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---
title: "Index of accounting articles"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Index_of_accounting_articles"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:36.783155+00:00"
instance: "kb-cron"
---
This page is an index of accounting topics.
== A ==
Accounting ethics - Accounting information system - Accounting research - Activity-Based Costing - Assets
== B ==
Balance sheet
- Big Four auditors
- Bond
- Bookkeeping
- Book value
== C ==
Cash-basis accounting
- Cash-basis versus accrual-basis accounting
- Cash flow statement
- Certified General Accountant
- Certified Management Accountants
- Certified Public Accountant
- Chartered accountant
- Chart of accounts
- Common stock
- Comprehensive income
- Construction accounting
- Convention of conservatism
- Convention of disclosure
- Cost accounting
- Cost of capital
- Cost of goods sold
- Creative accounting
- Credit
- Credit note
- Current asset
- Current liability
== D ==
Debitcapital reserve
- Debit note
- Debt
- Deficit (disambiguation)
- Depreciation
- Diluted earnings per share
- Dividend
- Double-entry bookkeeping system
- Dual aspect
== E ==
E-accounting
- EBIT
- EBITDA
- Earnings per share
- Engagement Letter
- Entity concept
- Environmental accounting
- Expense
- Equity
- Equivalent Annual Cost
== F ==
Financial Accounting Standards Board
- Financial accountancy
- Financial audit
- Financial reports
- Financial statements
- Fixed assets
- Fixed assets management
- Forensic accounting
- Fraud deterrence
- Free cash flow
- Fund accounting
== G ==
Gain
- General ledger
- Generally Accepted Accounting Principles
- Going concern
- Goodwill
- Governmental Accounting Standards Board
== H ==
Historical cost - History of accounting
== I ==
Income
- Income statement
- Institute of Chartered Accountants in England and Wales
- Institute of Chartered Accountants of Scotland
- Institute of Management Accountants
- Intangible asset
- Interest
- Internal audit
- International Accounting Standards Board
- International Accounting Standards Committee
- International Accounting Standards
- International Federation of Accountants
- International Financial Reporting Standards
- Inventory
- Investment
- Invoices
- Indian Accounting Standards
== J ==
Job costing
- Journal
== L ==
Lean accounting
- Ledger
- Liability
- Long-term asset
- Long-term liabilities
- Loss on sale of residential property
== M ==
Maker-checker
- Management accounting
- Management Assertions
- Mark-to-market accounting
- Matching principle
- Materiality
- Money measurement concept
- Mortgage loan
== N ==
Negative assurance
- Net income
- Notes to the Financial Statements - net worth
== O ==
OBERAC
- One-for-one checking
- Online Accounting
- Operating expense
- Ownership equity
== P ==
Payroll
- Petty cash
- Philosophy of Accounting
- Preferred stock
- P/E ratio
- Positive accounting
- Positive assurance
- PricewaterhouseCoopers
- Profit and loss account
- Pro-forma amount
- Production accounting
- Project accounting
== R ==
Retained earnings
- Revenue
- Revenue recognition
== S ==
Sales journal
- Security
- Social accounting
- Spreadsheet
- Statement of changes in equity
- Statutory accounting principles
- Stock option
- Stock split
- Share capital
- Shareholder
- Shareholders' equity
- South African Institute of Chartered Accountants
- Sunk cost
== T ==
Three lines of defence
- Throughput accounting
- Trade credit
- Treasury stock
- Trial balance
== U ==
UK generally accepted accounting principles
- Unified Ledger Accounting
- U.S. Securities and Exchange Commission
- US generally accepted accounting principles
- Work sheet
- Write off
== See also ==
Outline of accounting
Outline of business
Outline of economics
Outline of management
Outline of marketing
Outline of production
Index of auditing-related articles

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---
title: "Index of linguistics articles"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Index_of_linguistics_articles"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:11:57.009286+00:00"
instance: "kb-cron"
---
Linguistics is the scientific study of human language. Someone who engages in this study is called a linguist.
== A ==
Abbreviation -
Abessive case -
Ablaut -
Absolutive case -
Abugida -
Accusative case -
Acute accent -
Accent (phonetics) -
Accent (sociolinguistics) -
Acronym -
Adessive case -
Adjective -
Adjunct -
Adposition -
Adpositional phrase -
Adverb -
Adverbial -
Adverbial phrase -
Affix -
Affricate consonant -
Agglutination -
Agglutinative language -
Allative case -
Allomorph -
Allophone -
Alphabet -
Analytic language -
Anaphora -
Animacy -
Anthropological linguistics -
Alveolar consonant -
Antonym -
Aorist -
Applied linguistics -
Approximant -
Areal feature -
Article -
Articulatory gestures -
Articulatory phonetics -
Aspect -
Asterisk -
Attrition -
Attraction -
Augment (Bantu languages) -
Augment (Indo-European) -
Auxiliary verb
== B ==
Back-formation -
Backronym -
Bilabial consonant -
Breathy voice -
Breve
== C ==
Calque -
Capitalization -
Capitonym -
Cardinal vowel -
Case -
Case in tiers -
Cedilla -
Chiasmus -
Circumfix -
Circumflex -
Clefting -
Click consonant -
Closed-class word -
Cognate -
Cognitive science -
Coherence -
Colloquialism -
Comitative case -
Comparative -
Comparative linguistics -
Comparative method -
Compound noun and adjective -
Compound verb -
Computer-assisted language learning -
Computational linguistics -
Conjugation -
Conjunct -
Conjunction -
Consonant -
Constructed language -
Context -
Contrastive analysis -
Contrastive linguistics -
Conversation analysis -
Copula -
Corpus linguistics -
Cranberry morpheme -
Creaky voice -
Creole language -
Cryptanalysis -
Cuneiform
== D ==
Dangling modifier -
Dative case -
Decipherment -
Declension -
Defective verb -
Descriptive linguistics -
Dental consonant -
Derivation -
Determiner -
Diacritic -
Diaeresis -
Dialect -
Dictionary -
Diphthong -
Diplomatics -
Discourse -
Disjunct -
Dislocation -
Double acute accent -
Dual grammatical number
== E ==
Eggcorn -
Ecolinguistics -
Elative case -
Endangered language -
English pronunciation -
Entailment -
Ergative case -
Error -
Essive case -
Ethnologue -
Etymology -
Etymologist -
Eurolinguistics -
Evolution of languages -
Evolutionary linguistics -
Example-based machine translation -
Exegesis -
Expletive -
Expletive attributive
== F ==
False cognate -
False friend -
Figleaf-
Formal language -
Fricative consonant -
Function word -
Fusional language -
Future perfect -
Future tense
== G ==
Gender -
General semantics -
Genitive case -
Germanic umlaut -
Gerund -
Glottal consonant -
Glottal stop -
Glottochronology -
Government -
Grammar -
Grammatical gender -
Grammatical mood -
Grammatical number -
Grammatical voice -
Grave accent -
Great consonant shift -
Great Vowel Shift -
Grimm's law -
Guttural consonant
== H ==
Hacek -
Heaps' law -
Hermeneutics -
Hiatus (linguistics) -
High rising terminal -
Historical-comparative linguistics -
Historical linguistics -
History of linguistics -
Homonym -
Hypernym -
Hyponym
== I ==
I-mutation -
Ideogram -
Idiolect -
Idiom -
Illative case -
Impersonal pronoun -
Impersonal verb -
Implication (pragmatics) -
Indo-European languages -
Inessive case -
Infinitive -
Infix -
Inflected language -
Inflection -
Initialism -
Initial-stress-derived noun -
Instructive case -
Interjection -
Interactional linguistics -
International Phonetic Alphabet -
IPA chart for English -
Irregular verb
== J ==
== K ==
== L ==
Labiodental consonant -
Langue and parole -
Language -
Language acquisition -
Language attrition -
Language education -
Language families and languages -
Language game -
The Language Instinct -
Language isolate -
Laryngeal theory -
Lateral consonant -
Lemma -
Lexeme -
Lexical semantics -
Lexicography -
Lexicology -
Lexicon -
Linguist -
Linguistic anthropology -
Linguistic ecology -
Linguistic layers -
Linguistic relativity -
Linguistics -
Linguistics basic topics -
Liquid consonant -
List of linguists -
Loanword -
Locative case
== M ==
Machine translation -
macron -
Manner of articulation -
Mass noun -
Mathematical linguistics -
Meaning -
Meronymy -
Metathesis -
Minimal pair -
Mispronunciation -
Modality -
Mood -
Mora -
Morpheme -
Morphology -
Mutual intelligibility
== N ==
Nasal consonant -
Nasal stop -
Natural language -
Natural language processing -
Natural language understanding -
Negative raising -
Neologism -
Neurolinguistics -
Nomenclature -
Nominative case -
Noun -
Noun phrase -
Null morpheme
== O ==
Onomasiology -
Onomatopoeia -
Open class word -
Optimality theory -
Origin of language -
Orthography -
Objectsubjectverb -
Objectverbsubject -
Oxytone
== P ==
Palatal consonant -
Paradigm -
Paroxytone -
Part of speech -
Participle -
Particle -
Partitive case -
Past tense -
Perfect (grammar) -
Persuasion -
Pharyngeal consonant -
Philology -
Philosophy of language -
Phonation -
Phone -
Phonetics -
Phonetic complement -
Phonetic transcription -
Phonology -
Phoneme -
Phonemics -
Phrase -
Phrase structure rules -
Pidgin -
Place of articulation -
Pleonasm -
Pluperfect -
Polysemy -
Polysynthetic language -
Portmanteau -
Possessive case -
Postalveolar consonant -
Postposition -
Pragmatics -
Prefix -
Preposition -
Prepositional phrase -
Prescription and description -
Present tense -
Presupposition -
Preterite -
Principles of interpretation -
Profanity -
Prolative case -
Pronoun -
Pronunciation -
Prosody (linguistics) -
Proparoxytone -
Pseudo-acronym -
Pseudo-Anglicism -
Psycholinguistics -
Punctuation
== Q ==
Quirky subject
== R ==
Radical -
Retroflex consonant -
Retronym -
Rhetoric -
Rhotics -
Romanization -
Rounded vowel
== S ==
SAMPA -
Schwa -
Second language -
Semantics -
Semantic class -
Semantic feature -
Semantic property -
Semiotics -
Semivowel -
Sentence -
Sentence function -
Shall -
Sign -
Sign language -
Sociolinguistics -
Sociolect -
Sociophonetics -
Slack voice -
Slang -
Sound change -
Sound pattern of English -
SOV -
Speaker recognition -
Specialised lexicography -
Speech communication -
Speech act -
Speech disorder -
Speech processing -
Speech recognition -
Speech synthesis -
Speech therapy -
Spiritus asper -
Split infinitive -
Standard language -
Stop consonant -
Stratificational linguistics -
String grammar -
Structuralism -
Stylistics -
Subcategorization -
Superlative -
Suppletion -
Subject -
SVO -
Supine -
Syllabary -
Syllable -
Synonym -
Syntactic ambiguity -
Syntactic categories -
Syntax -
Synthetic language
== T ==
Tagmemics -
Telicity -
Tense -
Tenseaspectmood -
Terminology -
Text linguistics -
Text types -
Thematic role -
Theoretical linguistics -
Thesaurus -
Thou -
Timemannerplace -
Tonal language -
Tone (linguistics) -
Tongue-twister -
Transcription -
Transformational-generative grammar -
Translation -
Translative case -
Truth condition -
TV distinction -
Typology
== U ==
Uninflected word -
Universal grammar -
Uvular consonant
== V ==
V2 word order -
Variety -
Velar consonant -
Verb -
Verbobjectsubject -
Verb phrase -
Verbsubjectobject -
Verbal noun -
Verner's law -
Vocative case -
Vowel -
Vowel harmony -
Vowel stems -
== W ==
Weak suppletion -
Will (verb) -
Word -
Word-sense disambiguation -
Writing -
Writing systems -
Wug test
== X ==
X-bar theory
== Y ==
== Z ==
Zipf's law

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---
title: "Index of phonetics articles"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Index_of_phonetics_articles"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:09.282005+00:00"
instance: "kb-cron"
---
== A ==
Acoustic phonetics
Active articulator
Affricate
Airstream mechanism
Alexander John Ellis
Alexander Melville Bell
Alfred C. Gimson
Allophone
Alveolar approximant (ɹ)
Alveolar click (ǃ)
Alveolar consonant
Alveolar ejective (tʼ)
Alveolar ejective affricate (tsʼ)
Alveolar ejective fricative (sʼ)
Alveolar flap (ɾ)
Alveolar lateral approximant (l, l̥)
Alveolar lateral ejective affricate (tɬʼ)
Alveolar lateral ejective fricative (ɬʼ)
Alveolar lateral flap (ɺ)
Alveolar nasal (n)
Alveolar ridge
Alveolar trill (r, r̥)
Alveolo-palatal consonant
Alveolo-palatal ejective fricative (ɕʼ)
Apical consonant
Approximant consonant
Articulatory phonetics
Aspirated consonant (◌ʰ)
Auditory phonetics
== B ==
Back vowel
Basis of articulation
Bernd J. Kröger
Bilabial click (ʘ)
Bilabial consonant
Bilabial ejective (pʼ)
Bilabial flap (ⱱ̟)
Bilabial nasal (m)
Bilabial trill (ʙ)
Breathy voice
Bidental consonant
== C ==
Cardinal vowel
Central vowel
Checked vowel
Click consonant
Close back rounded vowel (u)
Close back unrounded vowel (ɯ)
Close central rounded vowel (ʉ)
Close central unrounded vowel (ɨ)
Close front rounded vowel (y)
Close front unrounded vowel (i)
Close vowel
Close-mid back rounded vowel (o)
Close-mid back unrounded vowel (ɤ)
Close-mid central rounded vowel (ɵ)
Close-mid central unrounded vowel (ɘ)
Close-mid front rounded vowel (ø)
Close-mid front unrounded vowel (e)
Close-mid vowel
Co-articulated consonant
Coarticulation
Comparison of ASCII encodings of the International Phonetic Alphabet
Consonant
Consonant cluster
Continuant
Creaky voice
== D ==
Daniel Jones
David Abercrombie
Dental click (ǀ)
Dental consonant
Dental ejective (t̪ʼ)
Dental ejective fricative (θʼ)
Dental nasal (n̪)
Diphthong
Dorsal consonant
== E ==
Eclipsis
Ejective consonant
Eli Fischer-Jørgensen
Elision
Epenthesis
Epiglottal consonant
Epiglottal flap (ʡ̯)
Epiglottal plosive (ʡ)
Epiglottal trill (ʢ)
== F ==
Formant
Fortis (phonetics)
Fortis and lenis
Free vowel
Fricative consonant
Front vowel
== G ==
Gemination
Georg Heike
Glide
Glottis
Glottal consonant
Glottalic consonant (ingressive, egressive)
Glottal stop (ʔ)
== H ==
Hard palate
Henry Sweet
High rising terminal
Hush consonant
== I ==
Ian Maddieson
Ilse Lehiste
Implosive consonant
Ingressive speech
International Phonetic Alphabet
International Phonetic Association
Intonation
== J ==
J. C. Catford
John C. Wells
John Laver
John Local
John Ohala
John Samuel Kenyon
== K ==
Kenneth Lee Pike
Kenneth N. Stevens
== L ==
Labialization
Labial-palatal approximant (ɥ)
Labial-palatal consonant
Labial-uvular consonant
Labial-uvular plosive (q͡p)
Labial-velar approximant (w)
Labial-velar consonant
Labial-velar nasal (ŋ͡m)
Labiodental approximant (ʋ)
Labiodental consonant
Labiodental ejective fricative (fʼ)
Labiodental flap (ⱱ)
Labiodental nasal (ɱ)
Lateral click (ǁ)
Laminal consonant
Lateral consonant
Length (phonetics)
Lenis
Lexical stress
Lilias Armstrong
Linguolabial consonant
Lips
Liquid consonant
List of consonants
List of vowels
Luciano Canepari
Ludmilla A. Chistovich
== M ==
Manner of articulation
Mark Liberman
Median consonant
Metathesis
Mid central vowel (ə)
Mid vowel
Monophthong
== N ==
Nasal consonant
Nasal stop
Nasal vowel
Nasalization
Near-close back rounded vowel (ʊ)
Near-close front rounded vowel (ʏ)
Near-close front unrounded vowel (ɪ)
Near-close vowel
Near-open central vowel (ɐ)
Near-open front unrounded vowel (æ)
Near-open vowel
== O ==
Obsolete and nonstandard symbols in the International Phonetic Alphabet
Occlusion
Open back rounded vowel (ɒ)
Open back unrounded vowel (ɑ)
Open front rounded vowel (ɶ)
Open front unrounded vowel (a)
Open vowel
Open-mid back rounded vowel (ɔ)
Open-mid back unrounded vowel (ʌ)
Open-mid central rounded vowel (ɞ)
Open-mid central unrounded vowel (ɜ)
Open-mid front rounded vowel (œ)
Open-mid front unrounded vowel (ɛ)
Open-mid vowel
Oral consonant
== P ==
Palatal approximant (j, j̊)
Palatal click (ǂ)
Palatal consonant
Palatal ejective (cʼ)
Palatal lateral approximant (ʎ)
Palatal lateral ejective affricate (cʎ̝̥ʼ)
Palatal lateral flap (ʎ̯)
Palatal nasal (ɲ, ɲ̟)
Palatalization
Palato-alveolar ejective affricate (tʃʼ)
Palato-alveolar ejective fricative (ʃʼ)
Palatography
Pāṇini
Passive articulator
Peter Ladefoged
Peter Roach (phonetician)
Pharyngeal consonant
Pharyngealization
Philip Lieberman
Phonation
Phone
Phoneme
Phonetic palindrome
Phonetics
Phonetic transcription
Pitch accent
Place of articulation
Plosive consonant
Postalveolar consonant
Postalveolar nasal (n̠)
Preaspiration
Prenasalized consonant
Prosody
Pulmonic egressive
== R ==
R-colored vowel
Retroflex approximant (ɻ)
Retroflex click (‼)
Retroflex consonant
Retroflex ejective (ʈʼ)
Retroflex ejective affricate (ʈʂʼ)
Retroflex ejective fricative (ʂʼ)
Retroflex flap (ɽ)
Retroflex nasal (ɳ)
Retroflex lateral approximant (ɭ)
Retroflex lateral flap (ɺ̢)
Retroflex trill (ɽr)
Rhotic consonant
Rounded vowel
== S ==
Sandhi
SAMPA
Semivowel
Sibilant consonant
Sj-sound (ɧ)
Slack voice
Jennifer Smith (sociolinguist)
Sociophonetics
Sonorant
Sourcefilter model of speech production
Spectrogram
Speech organ
Speech perception
Stress accent
Stress (linguistics)
Stricture
Syllable
Syncope
== T ==
Table of vowels
Tap or flap consonant
Teeth
Tenseness
Tonal language
Tone sandhi
Tongue
Trill consonant
Triphthong
== U ==
Unrounded vowel
Uvula
Uvular consonant
Uvular ejective (qʼ)
Uvular ejective affricate (qχʼ)
Uvular ejective fricative (χʼ)
Uvular flap (ɢ̆)
Uvular nasal (ɴ)
Uvular trill (ʀ)
== V ==
Velar approximant (ɰ)
Velar consonant
Velar ejective (kʼ)
Velar ejective affricate (kxʼ)
Velar ejective fricative (xʼ)
Velar lateral approximant (ʟ)
Velar lateral ejective affricate (kʟ̝̊ʼ)
Velar lateral flap (ʟ̆)
Velar nasal (ŋ)
Velaric egressive
Velarization
Velum
Vocal cords
Vocal stress
Vocal tract
Voice onset time
Voiced alveolar affricate (dz)
Voiced alveolar fricative (z, ð̠)
Voiced alveolar implosive (ɗ)
Voiced alveolar lateral affricate (dɮ)
Voiced alveolar lateral fricative (ɮ)
Voiced alveolar plosive (d)
Voiced alveolo-palatal affricate (dʑ)
Voiced alveolo-palatal fricative (ʑ)
Voiced bilabial fricative (β)
Voiced bilabial implosive (ɓ)
Voiced bilabial plosive (b)
Voiced consonant
Voiced dental affricate (d̪z̪, dð)
Voiced dental fricative (z̪), (ð)
Voiced dental plosive (d̪)
Voiced epiglottal fricative (ʢ)
Voiced glottal fricative (ɦ)
Voiced implosive consonant
Voiced labial-velar plosive (ɡ͡b)
Voiced labiodental affricate (b̪v)
Voiced labiodental fricative (v)
Voiced labiodental plosive (b̪)
Voiced palatal affricate (ɟʝ)
Voiced palatal fricative (ʝ)
Voiced palatal implosive (ʄ)
Voiced palatal plosive (ɟ)
Voiced palato-alveolar affricate (dʒ)
Voiced pharyngeal fricative (ʕ)
Voiced postalveolar fricative (ʒ)
Voiced retroflex affricate (ɖʐ)
Voiced retroflex fricative (ʐ)
Voiced retroflex implosive (ᶑ)
Voiced retroflex plosive (ɖ)
Voiced uvular affricate (ɢʁ)
Voiced uvular fricative (ʁ)
Voiced uvular implosive (ʛ)
Voiced uvular plosive (ɢ)
Voiced velar affricate (ɡɣ)
Voiced velar fricative (ɣ)
Voiced velar implosive (ɠ)
Voiced velar lateral affricate (ɡʟ̝)
Voiced velar lateral fricative (ʟ̝)
Voiced velar plosive (ɡ)
Voiceless alveolar affricate (ts)
Voiceless alveolar fricative (s, θ̠)
Voiceless alveolar lateral affricate (tɬ)
Voiceless alveolar lateral fricative (ɬ)
Voiceless alveolar nasal (n̥)
Voiceless alveolar plosive (t)
Voiceless alveolo-palatal affricate (tɕ)
Voiceless alveolo-palatal fricative (ɕ)
Voiceless bilabial fricative (ɸ)
Voiceless bilabial nasal (m̥)
Voiceless bilabial plosive (p)
Voiceless consonant
Voiceless dental affricate (t̪s̪, tθ)
Voiceless dental fricative (s̪, θ)
Voiceless dental plosive (t̪)
Voiceless epiglottal fricative (ʜ)
Voiceless glottal fricative (h)
Voiceless labial-velar fricative (ʍ)
Voiceless labial-velar plosive (k͡p)
Voiceless labiodental affricate (p̪f)
Voiceless labiodental fricative (f)
Voiceless labiodental plosive (p̪)
Voiceless palatal affricate (cç)
Voiceless palatal fricative (ç)
Voiceless palatal lateral affricate (cʎ̥˔)
Voiceless palatal lateral fricative (ʎ̝̊)
Voiceless palatal nasal (ɲ̊)
Voiceless palatal plosive (c)
Voiceless pharyngeal fricative (ħ)
Voiceless postalveolar affricate (tʃ)
Voiceless postalveolar fricative (ʃ)
Voiceless retroflex affricate (ʈʂ)
Voiceless retroflex fricative (ʂ)
Voiceless retroflex lateral fricative (ꞎ)
Voiceless retroflex nasal (ɳ̊)
Voiceless retroflex plosive (ʈ)
Voiceless retroflex trill (ɽr̥)
Voiceless uvular affricate (qχ)
Voiceless uvular fricative (χ)
Voiceless uvular nasal (ɴ̥)
Voiceless uvular plosive (q)
Voiceless uvular trill (ʀ̥)
Voiceless velar affricate (kx)
Voiceless velar fricative (x)
Voiceless velar lateral affricate (kʟ̝̊)
Voiceless velar lateral fricative (ʟ̝̊)
Voiceless velar nasal (ŋ̊)
Voiceless velar plosive (k)
Voicing
Vowel
Vowel backness
Vowel harmony
Vowel height
Vowel hiatus
Vowel length
Vowel reduction
Vowel roundedness
== W ==
Whispering
== X ==
X-SAMPA
== Y ==
Yi Tso-lin

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---
title: "Iron (metaphor)"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Iron_(metaphor)"
category: "reference"
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---
Iron, when used metaphorically, refers to certain traits of the metal iron. Used as an adjective and sometimes as a noun, it refers to something stern, harsh, strong, unyielding, inflexible, rigid, sturdy, strong, robust, hard.
== List of iron metaphors ==
=== Persons and characters ===
Iron Duke (disambiguation)
Iron Felix (disambiguation)
Iron Lady (disambiguation)
Iron Man (disambiguation)
Iron Mike (disambiguation)
Princess Iron Fan (disambiguation)
Otto von Bismarck, known as the Iron Chancellor
Iron Chef, a Japanese cooking show
Joseph LaFlesche, known as Iron Eye
Iron Eyes Cody, Sicilian-American actor
The Iron Heinrich, a rough translation of the German fairy tale The Frog Prince
Iron Heroes, a variant book of rules for the game Dungeons & Dragons
Iron John, a German fairy tale
Eon Kid, English title of the TV series Iron Kid
Iron Lad, a fictional superhero
Iron Maniac, an evil alternative universe character of fictional Marvel superhero Iron Man
Iron Munro, a fictional superhero
Persephone, known as the Iron Queen
Hossein Khosrow Ali Vaziri, known as the Iron Sheik
Iron Shell, Brule Sioux chief
Iron Tail, Oglala Sioux warrior
Tigran Petrosian, known as Iron Tigran
Timur as a name, meaning iron in Turkic languages, widespread in Western and Central Asia since the days of the Mongol Empire
Hadid is an Arabic name (both given and surname) literally meaning "iron"
=== Animals and plants ===
Iron Bird (disambiguation)
Iron Butterfly (disambiguation)
Iron Dragon (disambiguation)
Iron Eagle (disambiguation)
Iron Monkey (disambiguation)
Iron Wolf (disambiguation)
Iron horse (disambiguation)
Iron wood (disambiguation)
Ferrocalamus (iron bamboo)
Iron cobra, a "construct" in the game Dungeons & Dragons
Iron condor, an option trading strategy utilizing two vertical spreads
Iron Kong, a fictional character from the science fiction media franchise Zoids
=== Body parts ===
Iron Fist (disambiguation)
Iron Hand (disambiguation)
Iron Hands (disambiguation)
Iron lung (disambiguation)
See Joseph LaFlesche
The Iron Heel, a 1908 dystopian novel
Iron Palm, a body of training techniques in various Chinese martial arts
=== Geography ===
Iron City (disambiguation)
Iron Mountain (disambiguation)
Iron River (disambiguation)
Iron Range, regions around Lake Superior in the United States and Canada
=== Other iron metaphors ===
Iron Bird (disambiguation)
Iron Curtain (disambiguation)
Iron Maiden (disambiguation)
Iron Triangle (disambiguation)
Unguided bomb, known as an iron bomb
Iron Brigade, a Civil War brigade
Iron cage, a sociology term
Iron Fire, a Danish power and speed metal band
Iron Guard, a historical far-right movement in Romania
Iron harvest, an annual "harvest" collected by Belgian and French farmers after ploughing their fields
Iron Helix, a 1993 video game
Iron Seed, a 1994 DOS video game
Iron shirt, a form of hard style martial art exercise
Iron Sunrise, a 2004 hard science fiction novel
Iron Will, a 1994 film
== Gallery ==
== See also ==
Iron (disambiguation)
Big Iron, a country ballad
The dictionary definition of iron at Wiktionary
== References ==
== Further reading ==
Theodore Wertime and James Muhly, eds., The Coming of the Age of Iron (Yale, 1980, ISBN 0-300-02425-8) (hardcover)
"Iron, Master of Them All" from the University of Iowa Museum of Art and Project for the Advanced Study of Art and Life in Africa, discussing various metaphors (associated with iron) in African cultures.

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title: "LeipzigJakarta list"
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source: "https://en.wikipedia.org/wiki/LeipzigJakarta_list"
category: "reference"
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instance: "kb-cron"
---
The LeipzigJakarta list of 100 words is used by linguists to test the degree of chronological separation of languages by comparing words that are resistant to borrowing. The LeipzigJakarta list became available in 2009. The word list is named after the cities of Leipzig, Germany, and Jakarta, Indonesia, the places where the list was conceived and created.
In the 1950s, the linguist Morris Swadesh published a list of 200 words called the Swadesh list, allegedly the 200 lexical concepts found in all languages that were least likely to be borrowed from other languages. Swadesh later whittled his list down to 100 items. The Swadesh list, however, was based mainly on intuition, according to Martin Haspelmath and Uri Tadmor. In origin, the words in the Swadesh lists were chosen for their universal, culturally independent availability in as many languages as possible, regardless of their "stability". Nevertheless, the stability of the resulting list of "universal" vocabulary under language change and the potential use of this fact for purposes of glottochronology have been analyzed by numerous authors, including Marisa Lohr 1999, 2000.
The Swadesh list was put together by Morris Swadesh on the basis of his intuition. Similar more recent lists, such as the Dolgopolsky list (1964) or the LeipzigJakarta list, are based on systematic data from many different languages, but they are not yet as widely known nor as widely used as the Swadesh list. Although he was one of the pioneers of glottochronology and lexicostatistics, his theories were often controversial, and some have been deprecated by later linguists.
The Loanword Typology Project, with the World Loanword Database (WOLD), published by the Max Planck Digital Library, was established to rectify this problem. Experts on 41 languages from across the world were given a uniform vocabulary list and asked to provide the words for each item in the language on which they were an expert, as well as information on how strong the evidence was that each word was borrowed. The 100 concepts that were found in most languages and were most resistant to borrowing formed the LeipzigJakarta list. Only 62 items on the LeipzigJakarta list and on the 100-word Swadesh list overlap, hence a 38% difference between the two lists.
A quarter of the words in the LeipzigJakarta list are human body parts: mouth, eye, leg/foot, navel, liver, knee, etc. Six animal words appear on the list: fish, bird, dog, louse, ant and fly animal species that are present wherever humans are as well.
The items house, name, rope and to tie are products of human culture, but are probably found in all present-day human societies. Haspelmath and Tadmor drew the conclusion that "rope is the most basic of human tools and tying is the most basic technology".
== List ==
Lexical items in the LeipzigJakarta list are ranked by semantic stability, i.e. words least likely to be replaced by other words as a language evolves. The right two columns indicate inclusion on the 100-word and 207-word Swadesh lists.
== Other differences with the Swadesh list ==
Items on the 100-word Swadesh list but not on the LeipzigJakarta list:
== See also ==
ASJP list
Swadesh list
Dolgopolsky list
Comparative method
Holle lists
== References ==
Loanwords in the World's Languages: A Comparative Handbook, Martin Haspelmath and Uri Tadmor (editors), 2009, de Gruyter Publishing
== External links ==
The Leipzig-Jakarta list on Concepticon

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title: "List of Banach spaces"
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---
In the mathematical field of functional analysis, Banach spaces are among the most important objects of study. In other areas of mathematical analysis, most spaces which arise in practice turn out to be Banach spaces as well.
== Classical Banach spaces ==
According to Diestel (1984, Chapter VII), the classical Banach spaces are those defined by Dunford & Schwartz (1958), which is the source for the following table.
Glossary of symbols for the table below:
F
{\displaystyle \mathbb {F} }
denotes the field of real numbers
R
{\displaystyle \mathbb {R} }
or complex numbers
C
.
{\displaystyle \mathbb {C} .}
K
{\displaystyle K}
is a compact Hausdorff space.
p
,
q
R
{\displaystyle p,q\in \mathbb {R} }
are real numbers with
1
<
p
,
q
<
{\displaystyle 1<p,q<\infty }
that are Hölder conjugates, meaning that they satisfy
1
q
+
1
p
=
1
{\displaystyle {\frac {1}{q}}+{\frac {1}{p}}=1}
and thus also
q
=
p
p
1
.
{\displaystyle q={\frac {p}{p-1}}.}
Σ
{\displaystyle \Sigma }
is a
σ
{\displaystyle \sigma }
-algebra of sets.
Ξ
{\displaystyle \Xi }
is an algebra of sets (for spaces only requiring finite additivity, such as the ba space).
μ
{\displaystyle \mu }
is a measure with variation
|
μ
|
.
{\displaystyle |\mu |.}
A positive measure is a real-valued positive set function defined on a
σ
{\displaystyle \sigma }
-algebra which is countably additive.
== Banach spaces in other areas of analysis ==
The Asplund spaces
The Hardy spaces
The space
BMO
{\displaystyle \operatorname {BMO} }
of functions of bounded mean oscillation
The space of functions of bounded variation
Sobolev spaces
The BirnbaumOrlicz spaces
L
A
(
μ
)
.
{\displaystyle L^{A}(\mu ).}
Hölder spaces
C
k
(
Ω
)
.
{\displaystyle C^{k}(\Omega ).}
Lorentz space
ba space
== Banach spaces serving as counterexamples ==
James' space, a Banach space that has a Schauder basis, but has no unconditional Schauder Basis. Also, James' space is isometrically isomorphic to its double dual, but fails to be reflexive.
Tsirelson space, a reflexive Banach space in which neither
p
{\displaystyle \ell ^{p}}
nor
c
0
{\displaystyle c_{0}}
can be embedded.
W.T. Gowers construction of a space
X
{\displaystyle X}
that is isomorphic to
X
X
X
{\displaystyle X\oplus X\oplus X}
but not
X
X
{\displaystyle X\oplus X}
serves as a counterexample for weakening the premises of the SchroederBernstein theorem
== See also ==
List of mathematical spaces Mathematical set with some added structurePages displaying short descriptions of redirect targets
List of topologies List of concrete topologies and topological spaces
Minkowski distance Vector distance using pth powers
== Notes ==
== References ==
Diestel, Joseph (1984), Sequences and series in Banach spaces, Springer-Verlag, ISBN 0-387-90859-5.
Dunford, N.; Schwartz, J.T. (1958), Linear operators, Part I, Wiley-Interscience.

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title: "List of Boolean algebra topics"
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instance: "kb-cron"
---
This is a list of topics around Boolean algebra and propositional logic.
== Articles with a wide scope and introductions ==
Algebra of sets
Boolean algebra (structure)
Boolean algebra
Field of sets
Logical connective
Propositional calculus
== Boolean functions and connectives ==
Ampheck
Analysis of Boolean functions
Balanced Boolean function
Bent function
Boolean algebras canonically defined
Boolean function
Boolean matrix
Boolean-valued function
Conditioned disjunction
Evasive Boolean function
Exclusive or
Functional completeness
Logical biconditional
Logical conjunction
Logical disjunction
Logical equality
Logical implication
Logical negation
Logical NOR
Majority function
Material conditional
Minimal axioms for Boolean algebra
Peirce arrow
Read-once function
Sheffer stroke
Sole sufficient operator
Symmetric Boolean function
Symmetric difference
Zhegalkin polynomial
== Examples of Boolean algebras ==
Boolean domain
Complete Boolean algebra
Interior algebra
Two-element Boolean algebra
== Extensions of Boolean algebras ==
Derivative algebra (abstract algebra)
Free Boolean algebra
Monadic Boolean algebra
== Generalizations of Boolean algebras ==
De Morgan algebra
First-order logic
Heyting algebra
LindenbaumTarski algebra
Skew Boolean algebra
== Syntax ==
Algebraic normal form
Boolean conjunctive query
Canonical form (Boolean algebra)
Conjunctive normal form
Disjunctive normal form
Formal system
== Technical applications ==
And-inverter graph
Logic gate
Boolean analysis
== Theorems and specific laws ==
Boolean prime ideal theorem
Compactness theorem
Consensus theorem
De Morgan's laws
Duality (order theory)
Laws of classical logic
Peirce's law
Stone's representation theorem for Boolean algebras
== People ==
Boole, George
De Morgan, Augustus
Jevons, William Stanley
Peirce, Charles Sanders
Stone, Marshall Harvey
Venn, John
Zhegalkin, Ivan Ivanovich
== Philosophy ==
Boole's syllogistic
Boolean implicant
Entitative graph
Existential graph
Laws of Form
Logical graph
== Visualization ==
Truth table
Karnaugh map
Venn diagram
== Unclassified ==
Boolean function
Boolean-valued function
Boolean-valued model
Boolean satisfiability problem
Boolean differential calculus
Indicator function (also called the characteristic function, but that term is used in probability theory for a different concept)
Espresso heuristic logic minimizer
Logical matrix
Logical value
Stone duality
Stone space
Topological Boolean algebra

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title: "List of Latin-script alphabets"
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source: "https://en.wikipedia.org/wiki/List_of_Latin-script_alphabets"
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instance: "kb-cron"
---
The lists and tables below summarize and compare the letter inventories of some of the Latin-script alphabets. In this article, the scope of the word "alphabet" is broadened to include letters with tone marks, and other diacritics used to represent a wide range of orthographic traditions, without regard to whether or how they are sequenced in their alphabet or the table.
Parentheses indicate characters not used in modern standard orthographies of the languages, but used in obsolete and/or dialectal forms.
== Letters contained in the ISO basic Latin alphabet ==
=== Alphabets that contain only ISO basic Latin letters ===
Among alphabets for natural languages the English,[36] Indonesian, and Malay alphabets only use the 26 letters in both cases.
Among alphabets for constructed languages the Ido and Interlingua alphabets only use the 26 letters, while Toki Pona uses a 14-letter subset.
==== Extended by ligatures ====
German (ß), Scandinavian (æ)
==== Extended by diacritical marks ====
Spanish (ñ), German (ä, ö, and ü)
==== Extended by multigraphs ====
Filipino (ng)
Old French (ch)
=== Alphabets that contain all ISO basic Latin letters ===
Among alphabets for natural languages the Afrikaans,[54] Aromanian, Azerbaijani (some dialects),[53] Basque,[4] Celtic British, Catalan,[6] Cornish, Czech,[8] Danish,[9] Dutch,[10] Emilian-Romagnol, Filipino,[11] Finnish, French,[12], German,[13] Greenlandic, Hmong, Hungarian,[15] Javanese, Karakalpak,[23] Kurdish, Modern Latin, Luxembourgish, Norwegian,[9] Oromo[65], Papiamento[63], Portuguese, Quechua, Rhaeto-Romance, Romanian, Slovak,[24] Spanish,[25] Sundanese, Swedish, Tswana,[52] Venda,[51] Võro, Walloon,[27] West Frisian, Xhosa, Zhuang, Zulu alphabets include all 26 letters, at least in their largest version.
Among alphabets for constructed languages the Interglossa and Occidental alphabets include all 26 letters.
The International Phonetic Alphabet (IPA) includes all 26 letters in their lowercase forms, although g is always single-storey (ɡ) in the IPA and never double-storey ().
=== Alphabets that do not contain all ISO basic Latin letters ===
This list is based on official definitions of each alphabet. However, excluded letters might occur in non-integrated loan words and place names.
The I is used in two distinct versions in Turkic languages: dotless (I ı) and dotted (İ i). They are considered different letters, and case conversion must take care to preserve the distinction. Irish traditionally does not write the dot, or tittle, over the small letter i, but the language makes no distinction here if a dot is displayed, so no specific encoding and special case conversion rule is needed as it is for Turkic alphabets.
==== Statistics ====
The chart above lists a variety of alphabets that do not officially contain all 26 letters of the ISO basic Latin alphabet. In this list of 104 languages, at least one language lacks one of every letter. For each of the 26 basic ISO Latin alphabet letters, the number of alphabets in the list above using it is as follows:
== Letters not contained in the ISO basic Latin alphabet ==
Some languages have extended the Latin alphabet with ligatures, modified letters, or digraphs. These symbols are listed below.
=== Additional letters by type ===
==== Independent letters and ligatures ====
==== Letterdiacritic combinations: connected or overlaid ====
=== Other letters in collation order ===
The tables below are a work in progress. Eventually, table cells with light blue shading will indicate letter forms that do not constitute distinct letters in their associated alphabets. Please help with this task if you have the required linguistic knowledge and technical editing skill.
For the order in which the characters are sorted in each alphabet, see collating sequence.
==== Letters derived from AH ====
==== Letters derived from IO ====
==== Letters derived from PZ ====

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title: "List of Latin-script alphabets"
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---
=== Notes ===
↑↑↑↑ In classical Latin, the digraphs ⟨ch⟩, ⟨ph⟩, ⟨rh⟩, ⟨th⟩ were used in loanwords from Greek, but they were not included in the alphabet. The ligatures ⟨æ⟩, ⟨œ⟩ and ⟨w⟩, as well as lowercase letters, were added to the alphabet only in Middle Ages. The letters ⟨j⟩ and ⟨u⟩ were used as typographical variants of ⟨i⟩ and ⟨v⟩, respectively, roughly until the Enlightenment. ↑↑↑↑ In Afrikaans, ⟨c⟩ and ⟨q⟩ are only (and ⟨x⟩ and ⟨z⟩ almost only) used in loanwords. ↑↑↑↑ Albanian officially has the digraphs ⟨dh, gj, ll, nj, rr, sh, th, xh, zh⟩, which is sufficient to represent the Tosk dialect. The Gheg dialect supplements the official alphabet with 6 nasal vowels, namely ⟨â, ê, î, ô, û, ŷ⟩. ↑↑↑↑ Arbëresh officially has the digraphs ⟨dh, gj, hj, ll, nj, rr, sh, th, xh, zh⟩. Arbëresh has the distinctive ⟨hj⟩, which is considered as a letter in its own right. ↑↑ Achomi also has the digraph ⟨a'⟩. ↑↑↑↑ Azeri only uses the letter ⟨ä⟩ as a substitute for ⟨ə⟩ if the latter cannot be used (it was replaced by the schwa one year later because it is the most common letter). These cases should be avoided! The letters ⟨w⟩, ⟨đ⟩, ⟨ŋ⟩, ⟨q̇⟩, ⟨ć⟩ (or the digraph ⟨ts⟩), and the digraph ⟨dz⟩ are only used in certain dialects. ↑ Bambara also has the digraphs: ⟨kh⟩ (only present in loanwords), ⟨sh⟩ (also written as ⟨ʃ⟩; only present in some dialects). Historically, ⟨è⟩ was used instead of ⟨ɛ⟩, ⟨ny⟩ was used instead of ⟨ɲ⟩, and ⟨ò⟩ was used instead of ⟨ɔ⟩ in Mali. ↑↑↑↑ Basque has several digraphs: ⟨dd, ll, rr, ts, tt, tx, tz⟩. The ⟨ü⟩, which represents /ø/, is required for various words in its Zuberoan dialect. ⟨c, q, v, w, y⟩ are used in foreign words, but are officially considered part of the alphabet. ↑↑↑↑ Belarusian also has several digraphs: ⟨ch, dz, dź, dž⟩. ↑↑↑↑ Bislama also has the digraph ⟨ng⟩. ↑↑↑↑ Breton also has the digraphs ⟨ch, c'h, zh⟩. ⟨c, q, x⟩ are used in foreign words or digraphs only. ↑↑↑ Catalan also has a large number of digraphs: ⟨dj, gu, gü, ig, ix, ll, l·l, ny, qu, qü, rr, ss, tg, tj, ts, tx, tz⟩. The letters ⟨k, q, w, y⟩ are only used in loanwords or the digraphs mentioned. ↑↑ The Alphabet of Chad also uses the unique letters ⟨n̰⟩ and ⟨r̰⟩. ↑↑↑ Chamorro also has the digraphs ⟨ch, ng⟩. ⟨c⟩ used only in digraphs. ↑↑↑↑ Corsican has the trigraphs: ⟨chj, ghj⟩. ↑↑↑↑↑↑↑↑ Croatian Gaj's alphabet also has the digraphs: ⟨dž, lj, nj⟩. There are also four tone markers that are sometimes used on vowels to avoid ambiguity in homophones, but this is generally uncommon. Gaj's alphabet has been adopted by the Serbian and Bosnian standards and that it has complete one-to-one congruence with Serbian Cyrillic, where the three digraphs map to Cyrillic letters ⟨џ⟩, ⟨љ⟩ and ⟨њ⟩, respectively. Rarely and non-standardly, digraph ⟨dj⟩ is used instead of ⟨đ⟩ (like it was previously) (Cyrillic ⟨ђ⟩). Montenegrin variant additionally uses ⟨ś⟩ and ⟨ź⟩ to indicate dialectal pronunciation. ↑↑ Cypriot Arabic also has the letters ⟨Θ⟩ and ⟨Δ⟩. ↑↑↑↑ Czech also has the digraph ⟨ch⟩, which is considered a separate letter and is sorted between ⟨h⟩ and ⟨i⟩. While ⟨á, ď, é, ě, í, ň, ó, ť, ú, ů, ý⟩ are considered separate letters, in collation they are treated merely as letters with diacritics. However, ⟨č, ř, š, ž⟩ are sorted as separate letters. ⟨q, w, x⟩ occur only in loanwords. ↑ Dakelh also contains the letter ⟨'⟩, which represents the glottal stop. The letters ⟨f, p, r, v⟩ are only used in loanwords. ↑↑↑↑↑↑ The Norwegian alphabet is currently identical with the Danish alphabet. ⟨c⟩ is part of both alphabets and is not used in native Danish or Norwegian words (except some proper names), but occurs quite frequently in well-established loanwords in Danish. Norwegian and Danish use ⟨é⟩ in some words such as én, although ⟨é⟩ is considered a diacritic mark, while ⟨å, æ, ø⟩ are letters. ⟨q, w, x, z⟩ are not used except for names and some foreign words. ↑ Dinka also has the digraphs: ⟨dh, nh, ny, th⟩. ⟨h⟩ is only present in these digraphs. Dinka also used the letters ⟨ä, ë, ï, ö, ɛ̈, ɔ̈⟩ (the last two which do not exist as precomposed characters in Unicode)
↑↑↑ The status of ⟨ij⟩ as a letter, ligature or digraph in Dutch is disputed. ⟨c⟩ (outside the digraph ⟨ch⟩), ⟨q⟩, ⟨x⟩, and ⟨y⟩ occur mostly in foreign words. Letters with grave and letters with circumflex occur only in loanwords. ↑↑↑ English generally now uses extended Latin letters only in loan words, such as fiancé, fiancée, and résumé. Rare publication guides may still use the dieresis on words, such as "coöperate", rather than the now-more-common "co-operate" (UK) or "cooperate" (US). For a fuller discussion, see articles branching from Lists of English words of international origin, which was used to determine the diacritics needed for more unambiguous English. However, an ⟨é⟩ or ⟨è⟩ is sometimes used in poetry to show that a normally silent vowel is to be pronounced, as in "blessèd". ↑↑↑↑ Filipino [and also applicable in or to Tagalog, which is the topmost influencer and contributor language of Filipino, among the rest of the other influencer and contributor languages of the Philippines and foreign languages for Filipino's evolution, further development, and further enrichment; it (Tagalog) is also the de facto historical, traditional, and linguistic basis of Filipino and the de jure or official basis of Filipino's both predecessor Philippine national and official language/s or language phase/s or stage/s since 1937 (as a national language) and 1946 (as an official language), which is lastly institutionally, officially, and constitutionally named or renamed as or into Pilipino from 1959 to 1987, before being constitutionally and officially replaced by Filipino as the national and an official language since 1987] also uses the digraph ⟨ng⟩, even originally with a large tilde that spanned both ⟨n⟩ and ⟨g⟩ (as in ⟨n͠g⟩) when a vowel follows the digraph. (The use of the tilde over the two letters is now rare). Only ⟨ñ⟩ is required for everyday use (only in loanwords). The accented vowels are used in dictionaries to indicate pronunciation, and ⟨g⟩ with tilde is only present in older works. ⟨Ë⟩ and ⟨ë⟩ are new variants of ⟨E⟩ and ⟨e⟩, respectively, and we're introduced in 2013 by the Komisyon sa Wikang Filipino (Commission on the Filipino Language)'s "Ortograpiyang Pambansa" (National Orthography) and in 2014 by the Komisyon sa Wikang Filipino (Commission on the Filipino Language)'s KWF Manwal sa Masinop na Pagsulat (KWF Manual on Provident Writing) to represent and preserve the schwa vowel sound /ə/ in non-Tagalog Filipino words of Philippine origin or from the other languages of the Philippines that natively have this vowel sound in their languages. ↑↑↑ Uppercase diacritics in French are often (incorrectly) thought of as being optional, but the official rules of French orthography designate accents on uppercase letters as obligatory in most cases.

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category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:01.086550+00:00"
instance: "kb-cron"
---
⟨i⟩ or ⟨u⟩] and, when both are closed, generally over the first". In this context, the use of ⟨ï⟩ is rare, but part of the normative orthography. ↑ Swedish uses ⟨é⟩ in well integrated loan words like idé and armé, although ⟨é⟩ is considered a modified ⟨e⟩, while ⟨å⟩, ⟨ä⟩, ⟨ö⟩ are letters. ⟨á⟩ and ⟨à⟩ are rarely used words. ⟨w⟩ and ⟨z⟩ are used in some integrated words like webb and zon. ⟨q⟩, ⟨ü⟩, ⟨è⟩, and ⟨ë⟩ are used for names only, but exist in Swedish names. For foreign names ⟨ó⟩, ⟨ç⟩, ⟨ñ⟩ and more are sometimes used, but usually not. Swedish has many digraphs and some trigraphs. ⟨ch, dj, lj, rl, rn, rs, sj, sk, si, ti, sch, skj, stj⟩ and others are usually pronounced as one sound. ↑↑↑↑ Tswana also has the digraphs: ⟨kg, kh, ng, ph, th, tl, tlh, ts, tsh, tš, tšh⟩. The letters ⟨c⟩, ⟨q⟩, and ⟨x⟩ only appear in onomatopoeic and loanwords. The letters ⟨v⟩ and ⟨z⟩ only appear in loanwords. ↑↑↑↑ Turkmen had a slightly different alphabet in 19931995 (which used some rare letters) ⟨ý⟩ was written as ⟨ÿ⟩ (capital ⟨¥⟩), ⟨ň⟩ as ⟨ñ⟩, ⟨ş⟩ as ⟨¢⟩ (capital ⟨$⟩), and ⟨ž⟩ as ⟨⌠⟩ (capital ⟨£⟩) (so that all characters were available in Code page 437). In the new alphabet, all characters are available in ISO/IEC 8859-2. ↑↑↑ Ulithian also has the digraphs: ⟨ch, l', mw, ng⟩. ⟨c⟩ is used only in digraphs. ↑ Uzbek also has the digraphs: ⟨ch, ng, sh⟩ considered as letters. ⟨c⟩ is used only in digraphs. ⟨g'⟩, ⟨o'⟩ and apostrophe ⟨'⟩ are considered as letters. These letters have preferred typographical variants: ⟨gʻ⟩, ⟨oʻ⟩, and ⟨ʼ⟩ respectively. ↑↑↑↑ Venda also has the digraphs and trigraphs: ⟨bv, bw, dz, dzh, dzw, fh, hw, kh, khw, ng, ny, nz, ṅw, ph, pf, pfh, sh, sw, th, ts, tsh, tsw, ty, ṱh, vh, zh, zw⟩. ⟨c, j, q⟩ are used in foreign words. ↑↑↑↑ Vietnamese has seven additional base letters: ⟨ă â đ ê ô ơ ư⟩. It uses five tone markers that can go on top (or below) any of the 12 vowels (⟨a, ă, â, e, ê, i, o, ô, ơ, u, ư, y⟩); e.g.: grave accent (⟨à, ằ, ầ, è, ề, ì, ò, ồ, ờ, ù, ừ, ỳ⟩), hook above (⟨ả, ẳ, ẩ, ẻ, ể, ỉ, ỏ, ổ, ở, ủ, ử, ỷ⟩), tilde (⟨ã, ẵ, ẫ, ẽ, ễ, ĩ, õ, ỗ, ỡ, ũ, ữ, ỹ⟩), acute accent (⟨á, ắ, ấ, é, ế, í, ó, ố, ớ, ú, ứ, ý⟩), and dot below (⟨ạ, ặ, ậ, ẹ, ệ, ị, ọ, ộ, ợ, ụ, ự, ỵ⟩). It also uses several digraphs and trigraphs ⟨ch, gh, gi, kh, ng, ngh, nh, ph, th, tr⟩ but they are no longer considered letters. ↑↑↑↑ Walloon has the digraphs and trigraphs: ⟨ae, ch, dj, ea, jh, oe, oen, oi, sch, sh, tch, xh⟩. The letter ⟨x⟩ outside the digraph ⟨xh⟩ is in some orthographies, but not the default two. The letter ⟨q⟩ is in some orthographies, but not in the default two. Also in some orthographies are ⟨à⟩, ⟨ì⟩, ⟨ù⟩, and even ⟨e̊⟩ and ⟨o̊⟩ (which are not available as a precomposed character in Unicode, so ⟨ë⟩ and ⟨ö⟩ are used as substitutes)
↑↑↑↑ Welsh has the digraphs ⟨ch⟩, ⟨dd⟩, ⟨ff⟩, ⟨ng⟩, ⟨ll⟩, ⟨ph⟩, ⟨rh⟩, ⟨th⟩. Each of these digraphs is collated as a separate letter, and ⟨ng⟩ comes immediately after ⟨g⟩ in the alphabet. It also frequently uses circumflexes, and occasionally uses diaereses, acute accents and grave accents, on its seven vowels (⟨a, e, i, o, u, w, y⟩), but accented characters are not regarded as separate letters of the alphabet. ↑↑↑↑ Xhosa has a large number of digraphs, trigraphs, and even one tetragraph are used to represent various phonemes: ⟨bh, ch, dl, dy, dz, gc, gq, gr, gx, hh, hl, kh, kr, lh, mb, mf, mh, nc, ndl, ndz, ng, ng', ngc, ngh, ngq, ngx, nh, nkc, nkq, nkx, nq, nx, ntl, ny, nyh, ph, qh, rh, sh, th, ths, thsh, ts, tsh, ty, tyh, wh, xh, yh, zh⟩. It also occasionally uses acute accents, grave accents, circumflexes, and diaereses on its five vowels (⟨a, e, i, o, u⟩), but accented characters are not regarded as separate letters of the alphabet. ↑↑↑ Yapese has the digraphs and trigraphs: ⟨aa, ae, ch, ea, ee, ii, k', l', m', n', ng, ng', oe, oo, p', t', th, th', uu, w', y'⟩. ⟨q⟩, representing the glottal stop, is not always used. Often an apostrophe is used to represent the glottal stop instead. ⟨c⟩ is used only in digraphs. ⟨h⟩ is used only in digraphs and loanwords. ⟨q⟩ is used only in loanwords. ↑↑↑↑ Yoruba uses the digraph ⟨gb⟩. Also, vowels take a grave accent, an acute accent, or no accent, depending on tone. Although the "dot below" diacritic is widely used, purists prefer a short vertical underbar (Unicode COMBINING VERTICAL LINE BELOW U+0329) - this resembles the IPA notation for a syllabic consonant, attached to the base of the letter (⟨e⟩, ⟨o⟩ or ⟨s⟩). The seven Yoruba vowels (⟨a⟩, ⟨e⟩, ⟨ẹ⟩, ⟨i⟩, ⟨o⟩, ⟨ọ⟩, ⟨u⟩) can be uttered in three different tones: high (acute accent); middle (no accent) and low (grave accent). The letters ⟨m⟩ and ⟨n⟩, when written without diacritics, indicate nasalisation of the preceding vowel. ⟨m⟩ and ⟨n⟩ also occur as syllabics - in these circumstances, they take acute or grave tonal diacritics, like the vowels. Middle tone is marked with a macron to differentiate it from the unmarked nasalising consonants. A tilde was used in older orthography (still occasionally used) to indicate a double vowel. This is tonally ambiguous, and has now been replaced by showing the paired vowels, each marked with the appropriate tones. However, where a double vowel has the tonal sequence high-low or low-high, it may optionally be replaced by a single vowel with a circumflex (high-low) or caron (low-high), e.g. á + à = ⟨â⟩; à + á = ⟨ǎ⟩. ↑↑ Zuni contains the glottal stop ⟨'⟩ and the digraph: ⟨ch⟩; ⟨c⟩ is only used in that digraph. The other digraphs ⟨kw⟩, ⟨sh⟩, and ⟨ts⟩ are not part of the alphabet.
== Miscellaneous ==
Africa Alphabet
African reference alphabet
Beghilos
Gaj's Latin alphabet, is the only script of both the Croatian and Bosniak standard languages in current use, and one of the two scripts of both the Serbian and Montenegrin standard languages alongside the Cyrillic alphabet.
Initial Teaching Alphabet
International Phonetic Alphabet
Łatynka for Ukrainian
Leet (1337 alphabet)
Romani alphabet for most Romani languages
Sámi Latin alphabet
Standard Alphabet by Lepsius
Tatar alphabet, similar to Turkish alphabet and Jaꞑalif as a part of Uniform Turkic alphabet
Uralic Phonetic Alphabet
== See also ==
Diacritic
Latin-script alphabet
Latin-script multigraph
Latin script in Unicode
Ligature
List of Latin-script letters
List of precomposed Latin characters in Unicode
Romanization
Writing systems of Africa
Categories
Letters with diacritics
Latin-script ligatures
Phonetic transcription symbols
== Footnotes ==
== External links ==
Michael Everson's Alphabets of Europe
Typo.cz Information on Central European typography and typesetting
Letter database of the Institute of Estonian Language
Unicode language coverage tables
Diacritics Project All you need to design a font with correct accents

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title: "List of Russian language topics"
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source: "https://en.wikipedia.org/wiki/List_of_Russian_language_topics"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:15.976545+00:00"
instance: "kb-cron"
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The list of Russian language topics stores articles on grammar and other language-related topics that discuss (or should discuss) peculiarities of the Russian language (as well as of other languages) or provide examples from Russian language for these topics.
The list complements the Category:Russian language and does not overlap with it.
The "—" marks articles where the information about Russian language is inadequate or missing.
== Categories ==
Category:Cyrillic alphabets
Category:Cyrillic letters
Category:Cyrillization
Category:Language comparison
Category:Russian language
== Articles ==
Adposition
Assimilation (linguistics) (also reasonably covered in Russian phonology)
Barbarism (linguistics)
Capitalization
Clitic
Code-switching
Compound (linguistics)
Consonant mutation
Continuous and progressive aspects
Copula
Cyrillic script
Diacritic
Diminutive
Double negative
Expressive loan
False cognate
Filler (linguistics) —
Foreign language influences in English —
Four-letter word
Frequentative
Gemination
Gender-neutrality in languages with grammatical gender
Gobbledygook
Grammatical aspect
Grammatical cases:
Accusative case
Dative case
Genitive case
Instrumental case
Locative case
Nominative case
Prepositional case
Vocative case
Grammatical mood
Hypothetical mood
Hypocorism
Iotation
Khalyava
Language game —
Letter Zyu
List of ethnic slurs
List of offensive terms per nationality
List of Russian federal subject name etymologies
Malapropism#Examples in Russian language
Measure word
Metasyntactic variable
Minimal pair
Minced oath —
Mondegreen
Mojibake
Morse code
Morse code for Russian language —
Non-native pronunciations of English
Palatalization
Palindrome
Pangram --> List of pangrams
Patronymic
Paschal greeting
Piphilology
Placeholder name (kadigan)
Phonemes
Alveolar trill
Sibilant consonant
Voiceless velar fricative
Pseudo-anglicism
Relaxed pronunciation
Russification
Shibboleth —
Slavic languages
Stress (linguistics)
Isochrony —
Titlo
T-V distinction
Unstressed vowel —
Untranslatability
Zaum

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title: "List of Russian linguists and philologists"
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This list of Russian linguists and philologists includes notable linguists from the Russian Federation, the Soviet Union, the Russian Empire and other predecessor states of Russia.
== A ==
Vasily Abaev, prominent researcher of Iranian languages
Solomon Adlivankin, Soviet linguist, the founder of Perm derivatology school, took part in compiling Akchim dialect dictionary
Vladimir Admoni, linguist, literary critic, translator and poet, worked on the theory of grammar, historic and modern German syntax, defended Joseph Brodsky in court in 1964
Alexander Afanasyev, leading Russian folklorist, recorded and published over 600 Russian fairy tales, by far the largest folktale collection by any one man in the world
== B ==
Ivan Baudouin de Courtenay, co-inventor of the concept of phoneme and the systematic treatment of alternations, pioneer of synchronic analysis and mathematical linguistics
Victor Bayda, linguist specializing in Celtic and Germanic languages
Alexander Belskiy, Soviet specialist in literary criticism, famous Anglicist, founder of philological faculty at Perm State University, founder of Foreign literature Department at PSU
Otto von Böhtlingk, prominent Indologist and Sanskrit grammarian
Fyodor Buslaev, philologist and folklorist, representative of the Mythological school of comparative literature
Yakov Brandt, Sinologist
== D ==
Vladimir Dal, greatest Russian language lexicographer of the 19th century, folklorist and turkologist, author of the Explanatory Dictionary of the Live Great Russian language
Vladimir Dybo, a main figure in the Moscow School of Comparative Linguistics
== E ==
Tamara Erofeyeva, leader of school «Sociolinguistic study of urban language», head of Socio- and Psycholinguistics school at Department of General and Slavonic linguistics at Perm State National Research University, Honorary Figure of Russian Higher Education
=== F ===
Elena Fedorova, scholar of antiquity; doctor of philology, specialising in classical philology and cultural history
== G ==
Dmitry Gerasimov, medieval translator, diplomat and philologist, correspondent of European Renaissance scholars
== H ==
Eugene Helimski, a long-range comparative linguist
== I ==
Vladislav Illich-Svitych, founder of Nostratic linguistics and the Moscow School of Comparative Linguistics
Vyacheslav Ivanov, founder of glottalic theory of Indo-European consonantism
== J ==
Roman Jakobson, literary theorist and preeminent linguist of the 20th century, a founder of phonology, made numerous contributions to Slavic linguistics, author of Jackobson's Communication Model
== K ==
Pyotr Kafarov, prominent sinologist, developed the cyrillization of Chinese, discovered and published many invaluable manuscripts, including The Secret History of the Mongols
Alexander Kibrik, eminent typologist and caucasologist
Andrej Kibrik, specialist in linguistic typology, cognitive linguistics, discourse analysis, and Athabaskan languages
Valeriya Kirpichenko, linguist, translator, specialist in Arabic literature, professor at the Institute of Oriental Studies of the Russian Academy of Sciences
Yuri Knorozov, linguist, epigrapher and ethnographer, deciphered the ancient Maya script, proposed a decipherment for the Indus script
Rimma Komina, Soviet and Russian specialist in literary criticism, the Dean of philological faculty at Perm State University (19771982)
Andrey Korsakov, eminent linguist and language philosopher, specialised in the Germanic languages and English grammar, suggested philosophic reasoning for the parts of speech system and philosophic understanding of syntactic categories
Margarita Kozhina, Soviet and Russian linguist, specialist in stylistics, the founder of Perm school of functional stylistics
Nikolay Krushevsky, co-inventor of the concept of phoneme and the systematic treatment of alternations
== L ==
Gerasim Lebedev, pioneer of Indology, introduced Bengali script typing to Europe, founded the first European-style drama theater in India
Dmitry Likhachov, major 20th century expert on Old East Slavic language and literature
Mikhail Lomonosov, polymath scientist and artist, wrote a grammar that reformed Russian literary language by combining Old Church Slavonic with vernacular tongue
Nikolay Lvov, polymath artist and scientist, compiled the first significant collection of Russian folk songs, published epic bylinas
== M ==
Sergey Malov, turkologist, classified the Turkic alphabets, deciphered ancient Orkhon script
Nicholas Marr, put forth a pseudo-linguistic Japhetic theory on the origin of language
Igor Melchuk, structural linguist, author of Meaning-Text Theory
Anatoly Moskvin, philologist and linguist, arrested in 2011 after the bodies of 26 mummified young women were discovered in his home.
Leonid Murzin, Soviet and Russian linguist, the head of Perm derivatology school; he founded the Institute of dynamic linguistics
Vladimir Müller, linguist and lexicographer, author of popular EnglishRussian dictionary
== N ==
Sergei Nikolaev, a long-range comparative linguist
Semyon Novgorodov, Yakut politician and linguist, creator of written Yakut language (Sakha scripts)
== O ==
Sergei Ozhegov, author of the most widely used explanatory dictionary of Russian language
== P ==
Ilia Peiros, a long-range comparative linguist known for his work on Austric languages
Stephan of Perm, 14th century missionary, converted Komi Permyaks to Christianity and invented the Old Permic script
Yevgeny Polivanov, linguist, orientalist and polyglot, developed the cyrillization of Japanese
Nicholas Poppe, prominent Altaic languages researcher
Vladimir Propp, formalist scholar, major researcher of folk tales and mythology
Tatyana Proskuryakova, Mayanist scholarand archaeologist, deciphered the ancient Maya script
== R ==
George de Roerich, major 20th century Tibetologist
== S ==
Franz Anton Schiefner, prominent tibetologist, Finnic and Caucasus languages researcher
Isaac Jacob Schmidt, first researcher of Mongolian
Aleksey Shakhmatov, founder of textology, prepared major 20th century reforms of Russian orthography, pioneered the systematic research of Old Russian and medieval Russian literature
Lev Shcherba, phonetist and phonologist, author of the glokaya kuzdra phrase
Fyodor Shcherbatskoy, Indologist, initiated the scholarly study of Buddhist philosophy in the West
Vitaly Shevoroshkin, a long-range comparative linguists
Ivan Snegiryov, early collector of Russian proverbs and researcher of lubok prints
Izmail Sreznevsky, leading 19th century Slavist, published Codex Zographensis, Codex Marianus and Kiev Fragments
Georgiy Starostin, son of Sergei Starostin and long-range comparative linguistic researcher
Sergei Starostin, prominent supporter of Altaic languages theory, proposed DenéCaucasian languages macrofamily, reconstructed a number of Eurasian proto-languages
== T ==
Vasily Tatischev, geographer, ethnographer and historian, compiled the first encyclopedic dictionary of Russian
Chukchi Tenevil, reindeer herder who created a writing system for the Chukchi language
Nikolai Trubetzkoy, principal developer of phonology and inventor of morphophonology, defined phoneme, a founder of the Prague School of structural linguistics
== U ==
Dmitry Ushakov, author of the academic Explanatory Dictionary of the Russian Language
== V ==
Matrena Vakhrusheva, linguist and philologist, wrote the first Mansi-Russian dictionary and a pioneer in the development of Mansi literature and orthography for the Mansi language
Max Vasmer, leading Indo-European, Finno-Ugric and Turkic etymologist, author of the 'Etymological Dictionary of the Russian Language
Viktor Vinogradov, linguist and philologist, founder of the Russian Language Institute
Alexander Vostokov, coined the term Old Church Slavonic, discovered Ostromir Gospel (the most ancient East Slavic book), pioneer researcher of the Russian grammar
== Z ==
Andrey Zaliznyak, author of the comprehensive systematic description of Russian inflection, prominent researcher of the Old Novgorod dialect and birch bark documents, proved the authenticity of the Tale of Igor's Campaign
L. L. Zamenhof, inventor of Esperanto, the most widely spoken constructed international auxiliary language
== See also ==
List of linguists
List of Russian scientists
List of Russian historians
Linguistics of the Soviet Union
Moscow School of Comparative Linguistics
Russian language
Russian literature
Science and technology in Russia
== References ==

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title: "List of Serbo-Croatian words of Greek origin"
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source: "https://en.wikipedia.org/wiki/List_of_Serbo-Croatian_words_of_Greek_origin"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:21.339660+00:00"
instance: "kb-cron"
---
Greek influence was widespread throughout the Balkans during the Middle Ages, influencing the languages within it, including Serbo-Croatian. Many words of Greek origin were borrowed from other languages, while most others came via contact with the Greeks. Some words are present and common in the modern vernaculars of Serbo-Croatian: hiljada (хиљада), tiganj (тигањ), patos (патос). Almost every word of the Serbian Orthodox ceremonies are of Greek origin: parastos (парастос).
AG stands for Ancient Greek origin.
MG stands for Modern Greek origin.
C stands for Cyrillic (script).
L stands for Latin (script).
== See also ==
Arabic-Persian-Greek-Serbian Conversation Textbook
== References ==
"Grecizmi u srpskom jeziku". ЈУЖНОСЛОВЕНСКИ филолог. Srpska akademija nauka i umetnosti: 375403. GGKEY:00RD5D429DG.

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title: "List of Serbo-Croatian words of Turkish origin"
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source: "https://en.wikipedia.org/wiki/List_of_Serbo-Croatian_words_of_Turkish_origin"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:22.585909+00:00"
instance: "kb-cron"
---
Serbo-Croatian vernacular has over time borrowed and adopted a lot of words of Turkish origin. The Ottoman conquest of the Balkans began a linguistical contact between Ottoman Turkish and South Slavic languages, a period of influence since at least the late 14th up until the 20th century, when large territories of Shtokavian-speaking areas became conquered and made into provinces of the Ottoman Empire, into what was collectively known as Rumelia. As the Ottoman Turkish language itself extensively borrowed from Arabic, Persian and Central Asian Turkic languages other than itself, many words of such origins also entered Serbo-Croatian via Turkish. Numerous migrations in the war-torn Western Balkans helped spread Shtokavian and its enriched vernacular. Some Turkisms in Serbo-Croatian have entered the language through other languages, such as Italian, while some words of Greek origin have been adopted in their Turkish forms.
Over the passage of time, many Turkish loanwords were completely adopted into standardized varieties of Serbo-Croatian and are no longer considered loanwords, if not for lack of true synonyms. Numerous such Turkisms (e.g. bakar, alat, sat, čarape, šećer, or boja) are often preferred to later introduced Germanisms and Latinisms (farba, kolur, tinta, pigment). This is mostly the case with the Croatian variety of Serbo-Croatian, which has historically been more stringent to internationalisms. Out of all four varieties of the language, Bosnian has by far introduced and retained the most of Turkisms, largely due to its cultural Islamic ties. Turkish loanwords underwent pronunciation changes, principally on gender suffixes and adaptations of ö, ü, ı that are non-existent in Serbo-Croatian. Turkisms are also commonly called "Orientalisms".
== Characteristics ==
Turkisms often end in one of the following suffixes: luk, ci, li, which come from the original lik, çi, lı. Other suffixes include ak, hana, ija, suz and uk. Persian dār is also a common suffix. Many Serbo-Croatian words that are not of Turkish, Arabic or Persian origin have adopted these suffixes (e.g. kamiondžija, bezobrazluk, lopovluk), showing that influence of Turkish onto Serbo-Croatian extends past loanwords, into morphology and other linguistic characteristics.
== Number of Turkish loanwords ==
There is an uncertainly high number of Turkish loanwords (a lot of which are themselves loanwords from Arabic and Persian) in the modern Serbo-Croatian language, mostly contained within the prestige Shtokavian dialect, and fewer in Kajkavian and Chakavian. The first edition of Srpski rječnik from 1818 listed around 2,500 Turkisms among 26,270 total words (~9,5%), while the second edition from 1852 listed around 3,700 out of 40,000 (~9,25%).
Orientalist expert Olga Zirojević deems that a lot more Turkish loanwords have been used in Serbia's distant past - around 8,000 - than in the present, which is estimated to be around 3,000. First dictionary of Turkisms in Serbia was written by Djordje Popović-Daničar in 1884, called Turkish and other Eastern words in our language (Turske i druge istočanske reči u našem jeziku). The book contains around 6,000 words. Another academic, Dušan Marjanović, compiled a corpus of 5,000 Turkisms in early 1930s.
A prominent Sharia and jurist writer Abdulah Škaljić spent several years at the Institute for the study of folklore of University of Sarajevo thoroughly documenting Turkisms in the folk literature of Bosnia and Herzegovina. He subsequently created the most comprehensive dictionary of Turkisms, first published in 1957 in two volumes, then called Turkisms in the vernacular and folk literature of Bosnia and Herzegovina (Turcizmi u narodnom govoru i narodnoj književnosti Bosne i Hercegovine). Encouraged by great interest among domestic and international scientists and the demand for the dictionary, Škaljić expanded his research to the entirety of Serbo-Croatian-speaking area. In 1965 he published the dictionary named Turkisms in the Serbo-Croatian language (Turcizmi u srpskohrvatskom jeziku), which after several additions and revisions ended up having 8,742 words and 6,878 terms.
An academic research in the Croatian dialectological field was done by Silvana Vranić and Sanja Zubčić at the University of Rijeka. They analyzed a corpus of 443 Shtokavian, 122 Chakavian and 95 Kajkavian phrasemes typical of Croatian speech, in which they found 118, 45 and 29 Turkisms respectively. The ratio of phrasemes per Turkisms was found to be 4.1, 2.7 and 3.3 respectively, showing that Shtokavian contains the most Turkisms, although not equally distributed along regions where it is spoken - the most were found in Dalmatian Hinterland at 39%, then Slavonia at 36%, and Lika at 25%.
== List of loanwords ==
Only a number of Turkish loanwords are common to all four standardized varieties of Serbo-Croatian. Many more Turkisms lie in the vernacular speeches, which vary across regions and cultures. A large number of such loanwords are mainly found in the Bosnian standard, and are considered colloquial or non-existent in other varieties. The following is a non-exhaustive list thereof.
=== Food and cuisine loanwords ===
== See also ==
Arabic-Persian-Greek-Serbian Conversation Textbook
== References ==

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title: "List of abstract algebra topics"
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source: "https://en.wikipedia.org/wiki/List_of_abstract_algebra_topics"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:35.563780+00:00"
instance: "kb-cron"
---
In mathematics, more specifically algebra, abstract algebra or modern algebra is the study of algebraic structures, which are sets with specific operations acting on their elements. Algebraic structures include groups, rings, fields, modules, vector spaces, lattices, and algebras over a field. The term abstract algebra was coined in the early 20th century to distinguish it from older parts of algebra, and more specifically from elementary algebra, the use of variables to represent numbers in computation and reasoning. The abstract perspective on algebra has become so fundamental to advanced mathematics that it is simply called "algebra", while the term "abstract algebra" is seldom used except in pedagogy.
== Basic language ==
Algebraic structures are defined primarily as sets with operations.
Algebraic structure
Subobjects: subgroup, subring, subalgebra, submodule etc.
Binary operation
Closure of an operation
Associative property
Distributive property
Commutative property
Unary operator
Additive inverse, multiplicative inverse, inverse element
Identity element
Cancellation property
Finitary operation
Arity
Structure preserving maps called homomorphisms are vital in the study of algebraic objects.
Homomorphisms
Kernels and cokernels
Image and coimage
Epimorphisms and monomorphisms
Isomorphisms
Isomorphism theorems
There are several basic ways to combine algebraic objects of the same type to produce a third object of the same type. These constructions are used throughout algebra.
Direct sum
Direct limit
Direct product
Inverse limit
Quotient objects: quotient group, quotient ring, quotient module etc.
Tensor product
Advanced concepts:
Category theory
Category of groups
Category of abelian groups
Category of rings
Category of modules (over a fixed ring)
Morita equivalence, Morita duality
Category of vector spaces
Homological algebra
Filtration (algebra)
Exact sequence
Functor
Zorn's lemma
== Semigroups and monoids ==
Semigroup
Subsemigroup
Free semigroup
Green's relations
Inverse semigroup (or inversion semigroup, cf. [1])
KrohnRhodes theory
Semigroup algebra
Transformation semigroup
Monoid
Aperiodic monoid
Free monoid
Monoid (category theory)
Monoid factorisation
Syntactic monoid
== Group theory ==
=== Structure ===
Group (mathematics)
Lagrange's theorem (group theory)
Subgroup
Coset
Normal subgroup
Characteristic subgroup
Centralizer and normalizer subgroups
Derived group
Frattini subgroup
Fitting subgroup
Classification of finite simple groups
Sylow theorems
Local analysis
=== Constructions ===
Free group
Presentation of a group
Word problem for groups
Quotient group
Extension problem
Direct sum, direct product
Semidirect product
Wreath product
=== Types ===
Simple group
Finite group
Abelian group
Torsion subgroup
Free abelian group
Finitely generated abelian group
Rank of an abelian group
Cyclic group
Locally cyclic group
Solvable group
Composition series
Nilpotent group
Divisible group
Dedekind group, Hamiltonian group
=== Examples ===
Examples of groups
Trivial group
Additive group
Permutation group
Symmetric group
Alternating group
p-group
List of small groups
Klein four-group
Quaternion group
Dihedral group
Dicyclic group
Automorphism group
Point group
Circle group
Linear group
Orthogonal group
=== Applications ===
Group action
Conjugacy class
Inner automorphism
Conjugate closure
Stabilizer subgroup
Orbit (group theory)
Orbit-stabilizer theorem
Cayley's theorem
Burnside's lemma
Burnside's problem
Loop group
Fundamental group
== Ring theory ==
=== General ===
Ring (mathematics)
Commutative algebra, Commutative ring
Ring theory, Noncommutative ring
Algebra over a field
Non-associative algebra
Relatives to rings: Semiring, Nearring, Rig (algebra)
=== Structure ===
Subring, Subalgebra
Center (algebra)
Ring ideal
Principal ideal
Ideal quotient
Maximal ideal, minimal ideal
Primitive ideal, prime ideal, semiprime ideal
Radical of an ideal
Jacobson radical
Socle of a ring
unit (ring theory), Idempotent, Nilpotent, Zero divisor
Characteristic (algebra)
Ring homomorphism, Algebra homomorphism
Ring epimorphism
Ring monomorphism
Ring isomorphism
SkolemNoether theorem
Graded algebra
Morita equivalence
Brauer group
Stable range condition
=== Constructions ===
Direct sum of rings, Product of rings
Quotient ring
Matrix ring
Endomorphism ring
Polynomial ring
Formal power series
Monoid ring, Group ring
Localization of a ring
Tensor algebra
Symmetric algebra, Exterior algebra, Clifford algebra
Free algebra
Completion (ring theory)
=== Types ===
Field (mathematics), Division ring, division algebra
Simple ring, Central simple algebra, Semisimple ring, Semisimple algebra
Primitive ring, Semiprimitive ring
Prime ring, Semiprime ring, Reduced ring
Integral domain, Domain (ring theory)
Field of fractions, Integral closure
Euclidean domain, Principal ideal domain, Unique factorization domain, Dedekind domain, Prüfer domain
Von Neumann regular ring
Quasi-Frobenius ring
Hereditary ring, Semihereditary ring
Local ring, Semi-local ring
Discrete valuation ring
Regular local ring
CohenMacaulay ring
Gorenstein ring
Artinian ring, Noetherian ring
Perfect ring, semiperfect ring
Baer ring, Rickart ring
Lie ring, Lie algebra
Ideal (Lie algebra)
Jordan algebra
Differential algebra
Banach algebra
=== Examples ===
Rational number, Real number, Complex number, Quaternions, Octonions
Hurwitz quaternion
Gaussian integer
=== Theorems and applications ===
Algebraic geometry
Hilbert's Nullstellensatz
Hilbert's basis theorem
HopkinsLevitzki theorem
Krull's principal ideal theorem
Levitzky's theorem
Galois theory
AbelRuffini theorem
WedderburnArtin theorem
Jacobson density theorem
Wedderburn's little theorem
LaskerNoether theorem
== Field theory ==
=== Basic concepts ===
Field (mathematics)
Subfield (mathematics)
Multiplicative group
Primitive element (field theory)
Field extension
Algebraic extension
Splitting field
Algebraically closed field
Algebraic element
Algebraic closure
Separable extension
Separable polynomial
Normal extension
Galois extension
Abelian extension
Transcendence degree
Field norm
Field trace
Conjugate element (field theory)
Tensor product of fields
=== Types ===
Algebraic number field
Global field
Local field
Finite field
Symmetric function
Formally real field
Real closed field
=== Applications ===
Galois theory
Galois group
Inverse Galois problem
Kummer theory
== Module theory ==
=== General ===
Module (mathematics)
Bimodule
Annihilator (ring theory)
=== Structure ===
Submodule
Pure submodule
Module homomorphism
Essential submodule
Superfluous submodule
Singular submodule
Socle of a module
Radical of a module
=== Constructions ===
Free module
Quotient module
Direct sum, Direct product of modules
Direct limit, Inverse limit
Localization of a module
Completion (ring theory)
=== Types ===
Simple module, Semisimple module
Indecomposable module
Artinian module, Noetherian module
Homological types:
Projective module
Projective cover
Swan's theorem
QuillenSuslin theorem
Injective module
Injective hull
Flat module
Flat cover
Coherent module
Finitely-generated module
Finitely-presented module
Finitely related module
Algebraically compact module
Reflexive module

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=== Concepts and theorems ===
Composition series
Length of a module
Structure theorem for finitely generated modules over a principal ideal domain
Homological dimension
Projective dimension
Injective dimension
Flat dimension
Global dimension
Weak global dimension
Cohomological dimension
Krull dimension
Regular sequence (algebra), depth (algebra)
Fitting lemma
Schur's lemma
Nakayama's lemma
KrullSchmidt theorem
Steinitz exchange lemma
JordanHölder theorem
ArtinRees lemma
Schanuel's lemma
Morita equivalence
Progenerator
== Representation theory ==
Representation theory (& outline)
Algebra representation
Group representation
Lie algebra representation
Maschke's theorem
Schur's lemma
Equivariant map
Frobenius reciprocity
Induced representation
Restricted representation
Affine representation
Projective representation
Modular representation theory
Quiver (mathematics)
Representation theory of Hopf algebras
== Non-associative systems ==
=== General ===
Associative property, Associator
Heap (mathematics)
Magma (algebra)
Loop (algebra), Quasigroup
Nonassociative ring, Non-associative algebra
Universal enveloping algebra
Lie algebra (see also list of Lie group topics and list of representation theory topics)
Jordan algebra
Alternative algebra
Power associativity
Flexible algebra
=== Examples ===
CayleyDickson construction
Octonions
Sedenions
Trigintaduonions
Hyperbolic quaternions
Virasoro algebra
== Generalities ==
Algebraic structure
Universal algebra
Variety (universal algebra)
Congruence relation
Free object
Generating set (universal algebra)
Clone (algebra)
Kernel of a function
Kernel (algebra)
Isomorphism class
Isomorphism theorem
Fundamental theorem on homomorphisms
Universal property
Filtration (mathematics)
Category theory
Monoidal category
Groupoid
Group object
Coalgebra
Bialgebra
Hopf algebra
Magma object
Torsion (algebra)
== Computer algebra ==
Symbolic mathematics
Finite field arithmetic
Gröbner basis
Buchberger's algorithm
== See also ==
List of commutative algebra topics
List of homological algebra topics
List of linear algebra topics
List of algebraic structures
Glossary of field theory
Glossary of group theory
Glossary of ring theory
Glossary of tensor theory

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This is a list of algebraic coding theory topics.

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title: "List of algebraic constructions"
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An algebraic construction is a method by which an algebraic entity is defined or derived from another.
Instances include:
CayleyDickson construction
Proj construction
Grothendieck group
GelfandNaimarkSegal construction
Ultraproduct
ADHM construction
Burnside ring
Simplicial set
Fox derivative
Mapping cone (homological algebra)
Prym variety
Todd class
Adjunction (field theory)
Vaughan Jones construction
Strähle construction
Coset construction
Plus construction
Algebraic K-theory
GelfandNaimarkSegal construction
StanleyReisner ring construction
Quotient ring construction
Ward's twistor construction
Hilbert symbol
Hilbert's arithmetic of ends
Colombeau's construction
Vector bundle
Integral monoid ring construction
Integral group ring construction
Category of EilenbergMoore algebras
Kleisli category
Adjunction (field theory)
LindenbaumTarski algebra construction
Freudenthal magic square
StoneČech compactification

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This is a list of algebraic geometry topics, by Wikipedia page.
== Classical topics in projective geometry ==
Affine space
Projective space
Projective line, cross-ratio
Projective plane
Line at infinity
Complex projective plane
Complex projective space
Plane at infinity, hyperplane at infinity
Projective frame
Projective transformation
Fundamental theorem of projective geometry
Duality (projective geometry)
Real projective plane
Real projective space
Segre embedding of a product of projective spaces
Rational normal curve
== Algebraic curves ==
Conics, Pascal's theorem, Brianchon's theorem
Twisted cubic
Elliptic curve, cubic curve
Elliptic function, Jacobi's elliptic functions, Weierstrass's elliptic functions
Elliptic integral
Complex multiplication
Weil pairing
Hyperelliptic curve
Klein quartic
Modular curve
Modular equation
Modular function
Modular group
Supersingular primes
Fermat curve
Bézout's theorem
BrillNoether theory
Genus (mathematics)
Riemann surface
RiemannHurwitz formula
RiemannRoch theorem
Abelian integral
Differential of the first kind
Jacobian variety
Generalized Jacobian
Moduli of algebraic curves
Hurwitz's theorem on automorphisms of a curve
Clifford's theorem on special divisors
Gonality of an algebraic curve
Weil reciprocity law
Algebraic geometry codes
== Algebraic surfaces ==
EnriquesKodaira classification
List of algebraic surfaces
Ruled surface
Cubic surface
Veronese surface
Del Pezzo surface
Rational surface
Enriques surface
K3 surface
Hodge index theorem
Elliptic surface
Surface of general type
Zariski surface
== Algebraic geometry: classical approach ==
Algebraic variety
Hypersurface
Quadric (algebraic geometry)
Dimension of an algebraic variety
Hilbert's Nullstellensatz
Complete variety
Elimination theory
Gröbner basis
Projective variety
Quasiprojective variety
Canonical bundle
Complete intersection
Serre duality
Spaltenstein variety
Arithmetic genus, geometric genus, irregularity
Tangent space, Zariski tangent space
Function field of an algebraic variety
Ample line bundle
Ample vector bundle
Linear system of divisors
Birational geometry
Blowing up
Resolution of singularities
Rational variety
Unirational variety
Ruled variety
Kodaira dimension
Canonical ring
Minimal model program
Intersection theory
Intersection number
Chow ring
Chern class
Serre's multiplicity conjectures
Albanese variety
Picard group
Modular form
Moduli space
Modular equation
J-invariant
Algebraic function
Algebraic form
Addition theorem
Invariant theory
Symbolic method of invariant theory
Geometric invariant theory
Toric variety
Deformation theory
Singular point, non-singular
Singularity theory
Newton polygon
Weil conjectures
== Complex manifolds ==
Kähler manifold
CalabiYau manifold
Stein manifold
Hodge theory
Hodge cycle
Hodge conjecture
Algebraic geometry and analytic geometry
Mirror symmetry
== Algebraic groups ==
Linear algebraic group
Additive group
Multiplicative group
Algebraic torus
Reductive group
Borel subgroup
Radical of an algebraic group
Unipotent radical
LieKolchin theorem
Haboush's theorem (also known as the Mumford conjecture)
Group scheme
Abelian variety
Theta function
Grassmannian
Flag manifold
Weil restriction
Differential Galois theory
== Contemporary foundations ==
=== Commutative algebra ===
Prime ideal
Valuation (algebra)
Krull dimension
Regular local ring
Regular sequence
CohenMacaulay ring
Gorenstein ring
Koszul complex
Spectrum of a ring
Zariski topology
Kähler differential
Generic flatness
Irrelevant ideal
=== Sheaf theory ===
Locally ringed space
Coherent sheaf
Invertible sheaf
Sheaf cohomology
Coherent sheaf cohomology
HirzebruchRiemannRoch theorem
GrothendieckRiemannRoch theorem
Coherent duality
Dévissage
=== Schemes ===
Affine scheme
Scheme
Éléments de géométrie algébrique
Grothendieck's Séminaire de géométrie algébrique
Fiber product of schemes
Flat morphism
Smooth scheme
Finite morphism
Quasi-finite morphism
Proper morphism
Semistable elliptic curve
Grothendieck's relative point of view
Hilbert scheme
=== Category theory ===
Grothendieck topology
Topos
Derived category
Descent (category theory)
Grothendieck's Galois theory
Algebraic stack
Gerbe
Étale cohomology
Motive (algebraic geometry)
Motivic cohomology
A¹ homotopy theory
Homotopical algebra
== Algebraic geometers ==
Niels Henrik Abel
Carl Gustav Jacob Jacobi
Jakob Steiner
Julius Plücker
Arthur Cayley
Bernhard Riemann
Max Noether
William Kingdon Clifford
David Hilbert
Italian school of algebraic geometry
Guido Castelnuovo
Federigo Enriques
Francesco Severi
Solomon Lefschetz
Oscar Zariski
W. V. D. Hodge
Sir Michael Atiyah
Kunihiko Kodaira
André Weil
Jean-Pierre Serre
Alexander Grothendieck
Friedrich Hirzebruch
Igor Shafarevich
Heisuke Hironaka
Shreeram S. Abhyankar
Pierre Samuel
C.P. Ramanujam
David Mumford
Michael Artin
Phillip Griffiths
Pierre Deligne
Yuri Manin
Shigefumi Mori
Vladimir Drinfeld
Vladimir Voevodsky
Claire Voisin
János Kollár
Caucher Birkar
Burt Totaro
Patrick Brosnan
Robin Hartshorne
Joe Harris

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This is a list of algebraic number theory topics.
== Basic topics ==
These topics are basic to the field, either as prototypical examples, or as basic objects of study.
Algebraic number field
Gaussian integer, Gaussian rational
Quadratic field
Cyclotomic field
Cubic field
Biquadratic field
Quadratic reciprocity
Ideal class group
Dirichlet's unit theorem
Discriminant of an algebraic number field
Ramification (mathematics)
Root of unity
Gaussian period
== Important problems ==
Fermat's Last Theorem
Class number problem for imaginary quadratic fields
StarkHeegner theorem
Heegner number
Langlands program
== General aspects ==
Different ideal
Dedekind domain
Splitting of prime ideals in Galois extensions
Decomposition group
Inertia group
Frobenius automorphism
Chebotarev's density theorem
Totally real field
Local field
p-adic number
p-adic analysis
Adele ring
Idele group
Idele class group
Adelic algebraic group
Global field
Hasse principle
HasseMinkowski theorem
Galois module
Galois cohomology
Brauer group
== Class field theory ==
Class field theory
Abelian extension
KroneckerWeber theorem
Hilbert class field
Takagi existence theorem
Hasse norm theorem
Artin reciprocity
Local class field theory
== Iwasawa theory ==
Iwasawa theory
HerbrandRibet theorem
Vandiver's conjecture
Stickelberger's theorem
Euler system
p-adic L-function
== Arithmetic geometry ==
Arithmetic geometry
Complex multiplication
Abelian variety of CM-type
ChowlaSelberg formula
HasseWeil zeta function

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This is a list of possibly nonassociative algebras. An algebra is a module, wherein you can also multiply two module elements. (The multiplication in the module is compatible with multiplication-by-scalars from the base ring).
*-algebra
Affine Lie algebra
Akivis algebra
Algebra for a monad
Albert algebra
Alternative algebra
AW*-algebra
Azumaya algebra
Banach algebra
BirmanWenzl algebra
Boolean algebra
Borcherds algebra
Brauer algebra
C*-algebra
Central simple algebra
Clifford algebra
Cluster algebra
Dendriform algebra
Differential graded algebra
Differential graded Lie algebra
Exterior algebra
F-algebra
Filtered algebra
Flexible algebra
Freudenthal algebra
Functional-theoretic algebra
Factorization algebra
Genetic algebra
Geometric algebra
Gerstenhaber algebra
Graded algebra
Griess algebra
Group algebra
Group algebra of a locally compact group
Hall algebra
Hecke algebra of a locally compact group
Heyting algebra
Hopf algebra
Hurwitz algebra
Hypercomplex algebra
Incidence algebra
IwahoriHecke algebra
Jordan algebra
KacMoody algebra
Kleene algebra
Leibniz algebra
Lie algebra
Lie superalgebra
Malcev algebra
Matrix algebra
Non-associative algebra
Octonion algebra
Pre-Lie algebra
Poisson algebra
Process algebra
Quadratic algebra
Quadric geometric algebra
Quaternion algebra
Rees algebra
Relation algebra
Relational algebra
RotaBaxter algebra
Schur algebra
Semisimple algebra
Separable algebra
Shuffle algebra
Sigma-algebra
Simple algebra
Structurable algebra
Supercommutative algebra
Symmetric algebra
Tensor algebra
Universal enveloping algebra
Vertex operator algebra
von Neumann algebra
Weyl algebra
Zinbiel algebra
This is a list of fields of algebra.
Linear algebra
Homological algebra
Universal algebra

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This is a list of algorithm general topics.
Analysis of algorithms
Ant colony algorithm
Approximation algorithm
Best and worst cases
Big O notation
Combinatorial search
Competitive analysis
Computability theory
Computational complexity theory
Embarrassingly parallel problem
Emergent algorithm
Evolutionary algorithm
Fast Fourier transform
Genetic algorithm
Graph exploration algorithm
Heuristic
Hill climbing
Implementation
Las Vegas algorithm
Lock-free and wait-free algorithms
Monte Carlo algorithm
Numerical analysis
Online algorithm
Polynomial time approximation scheme
Problem size
Pseudorandom number generator
Quantum algorithm
Random-restart hill climbing
Randomized algorithm
Running time
Sorting algorithm
Search algorithm
Stable algorithm (disambiguation)
Super-recursive algorithm
Tree search algorithm
== See also ==
List of algorithms for specific algorithms
List of computability and complexity topics for more abstract theory
List of complexity classes, complexity class
List of data structures.

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An algorithm is a fundamental set of rules or defined procedures that are typically designed and used to be a simpler way to solve a specific problem or a broad set of problems.
Simply speaking, algorithms define different processes, sets of rules and regulations, or methodologies that are to be followed through in calculations, data processing, data mining, pattern recognition, automated reasoning or other problem-solving operations. With the increasing automation of services, more and more decisions are being made by algorithms. Some general examples are risk assessments, anticipatory policing, and pattern recognition technology.
The following is a list of well-known algorithms.
== Automated planning ==
== Combinatorial algorithms ==
=== General combinatorial algorithms ===
Brent's algorithm: finds a cycle in function value iterations using only two iterators
Floyd's cycle-finding algorithm: finds a cycle in function value iterations
GaleShapley algorithm: solves the stable matching problem
Pseudorandom number generators (uniformly distributed—see also List of pseudorandom number generators for other PRNGs with varying degrees of convergence and varying statistical quality):
ACORN generator
Blum Blum Shub
Lagged Fibonacci generator
Linear congruential generator
Mersenne Twister
=== Graph algorithms ===
Blossom algorithm: algorithm for constructing maximum-cardinality matching on graphs.
Coloring algorithm: algorithms for graph (vertex or edge) coloring (subject to constraints, e.g. proper coloring or list coloring)
HopcroftKarp algorithm: convert a bipartite graph to a maximum-cardinality matching
Hungarian algorithm: algorithm for finding a perfect matching
Prüfer coding: conversion between a labeled tree and its Prüfer sequence
Tarjan's off-line lowest common ancestors algorithm: computes lowest common ancestors for pairs of nodes in a tree
Topological sort: finds linear order of nodes (e.g. jobs) based on their dependencies.
==== Graph drawing ====
Coin graph drawing algorithms for finite connected planar graphs (approximately computing the theoretical circle-packing given by the Koebe-Andreev-Thurston theorem). See also Fáry's theorem on straight-line drawings of planar graphs.
Force-based algorithms (also known as force-directed algorithms or spring-based algorithms)
Spectral layout
==== Network theory ====
Network analysis
Link analysis
GirvanNewman algorithm: detect communities in complex systems
Web link analysis
Hyperlink-Induced Topic Search (HITS) (also known as Hubs and authorities)
PageRank
TrustRank
Flow networks
Dinic's algorithm: is a strongly polynomial algorithm for computing the maximum flow in a flow network.
EdmondsKarp algorithm: implementation of FordFulkerson
FordFulkerson algorithm: computes the maximum flow in a graph
Karger's algorithm: a Monte Carlo method to compute the minimum cut of a connected graph
Pushrelabel algorithm: computes a maximum flow in a graph
==== Routing for graphs ====
Edmonds' algorithm (also known as ChuLiu/Edmonds' algorithm): find maximum or minimum branchings
Euclidean minimum spanning tree: algorithms for computing the minimum spanning tree of a set of points in the plane
Longest path problem: find a simple path of maximum length in a given graph
Minimum spanning tree
Borůvka's algorithm
Kruskal's algorithm
Prim's algorithm
Reverse-delete algorithm
Nonblocking minimal spanning switch say, for a telephone exchange
Shortest path problem
BellmanFord algorithm: computes shortest paths in a weighted graph (where some of the edge weights may be negative)
Dijkstra's algorithm: computes shortest paths in a graph with non-negative edge weights
FloydWarshall algorithm: solves the all pairs shortest path problem in a weighted, directed graph
Johnson's algorithm: all pairs shortest path algorithm in sparse weighted directed graph
Transitive closure problem: find the transitive closure of a given binary relation
Traveling salesman problem
Christofides algorithm
Nearest neighbour algorithm
Vehicle routing problem
Clarke and Wright Saving algorithm
Warnsdorff's rule: a heuristic method for solving the Knight's tour problem
==== Graph search ====
A*: special case of best-first search that uses heuristics to improve speed
B*: a best-first graph search algorithm that finds the least-cost path from a given initial node to any goal node (out of one or more possible goals)
Backtracking: abandons partial solutions when they are found not to satisfy a complete solution
Beam search: is a heuristic search algorithm that is an optimization of best-first search that reduces its memory requirement
Beam stack search: integrates backtracking with beam search
Best-first search: traverses a graph in the order of likely importance using a priority queue
Bidirectional search: find the shortest path from an initial vertex to a goal vertex in a directed graph
Breadth-first search: traverses a graph level by level
Brute-force search: an exhaustive and reliable search method, but computationally inefficient in many applications
D*: an incremental heuristic search algorithm
Depth-first search: traverses a graph branch by branch
Dijkstra's algorithm: a special case of A* for which no heuristic function is used
General Problem Solver: a seminal theorem-proving algorithm intended to work as a universal problem solver machine.
Iterative deepening depth-first search (IDDFS): a state space search strategy
Jump point search: an optimization to A* which may reduce computation time by an order of magnitude using further heuristics
Lexicographic breadth-first search (also known as Lex-BFS): a linear time algorithm for ordering the vertices of a graph
SSS*: state space search traversing a game tree in a best-first fashion similar to that of the A* search algorithm
Uniform-cost search: a tree search that finds the lowest-cost route where costs vary
==== Subgraphs ====
Cliques
BronKerbosch algorithm: a technique for finding maximal cliques in an undirected graph
MaxCliqueDyn maximum clique algorithm: find a maximum clique in an undirected graph
Strongly connected components
Kosaraju's algorithm
Path-based strong component algorithm
Tarjan's strongly connected components algorithm
Subgraph isomorphism problem
=== Sequence algorithms ===

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==== Approximate sequence matching ====
Bitap algorithm: fuzzy algorithm that determines if strings are approximately equal.
Phonetic algorithms
DaitchMokotoff Soundex: a Soundex refinement which allows matching of Slavic and Germanic surnames
Double Metaphone: an improvement on Metaphone
Match rating approach: a phonetic algorithm developed by Western Airlines
Metaphone: an algorithm for indexing words by their sound, when pronounced in English
NYSIIS: phonetic algorithm, improves on Soundex
Soundex: a phonetic algorithm for indexing names by sound, as pronounced in English
String metrics: computes a similarity or dissimilarity (distance) score between two pairs of text strings
DamerauLevenshtein distance: computes a distance measure between two strings, improves on Levenshtein distance
Dice's coefficient (also known as the Dice coefficient): a similarity measure related to the Jaccard index
Hamming distance: sum number of positions which are different
JaroWinkler distance: is a measure of similarity between two strings
Levenshtein edit distance: computes a metric for the amount of difference between two sequences
Trigram search: search for text when the exact syntax or spelling of the target object is not precisely known
==== Selection algorithms ====
Introselect
Quickselect
==== Sequence search ====
Linear search: locates an item in an unsorted sequence
Selection algorithm: finds the kth largest item in a sequence
Sorted lists
Binary search algorithm: locates an item in a sorted sequence
Eytzinger binary search: cache friendly binary search algorithm
Fibonacci search technique: search a sorted sequence using a divide and conquer algorithm that narrows down possible locations with the aid of Fibonacci numbers
Jump search (or block search): linear search on a smaller subset of the sequence
Predictive search: binary-like search which factors in magnitude of search term versus the high and low values in the search. Sometimes called dictionary search or interpolated search.
Uniform binary search: an optimization of the classic binary search algorithm
Ternary search: a technique for finding the minimum or maximum of a function that is either strictly increasing and then strictly decreasing or vice versa
==== Sequence merging ====
k-way merge algorithm
Simple merge algorithm
Union (merge, with elements on the output not repeated)
==== Sequence permutations ====
FisherYates shuffle (also known as the Knuth shuffle): randomly shuffle a finite set
Heap's permutation generation algorithm: interchange elements to generate next permutation
Schensted algorithm: constructs a pair of Young tableaux from a permutation
SteinhausJohnsonTrotter algorithm (also known as the JohnsonTrotter algorithm): generates permutations by transposing elements
==== Sequence combinations ====
==== Sequence alignment ====
Dynamic time warping: measure similarity between two sequences which may vary in time or speed
Hirschberg's algorithm: finds the least cost sequence alignment between two sequences, as measured by their Levenshtein distance
NeedlemanWunsch algorithm: find global alignment between two sequences
SmithWaterman algorithm: find local sequence alignment
==== Sequence sorting ====
Exchange sorts
Bubble sort: for each pair of indices, swap the items if out of order
Cocktail shaker sort or bidirectional bubble sort, a bubble sort traversing the list alternately from front to back and back to front
Comb sort
Gnome sort
Oddeven sort
Quicksort: divide list into two, with all items on the first list coming before all items on the second list.; then sort the two lists. Often the method of choice
Humorous or ineffective
Bogosort: the list is randomly shuffled until it happens to be sorted
Slowsort
Stooge sort
Hybrid
Flashsort
Introsort: begin with quicksort and switch to heapsort when the recursion depth exceeds a certain level
Timsort: adaptative algorithm derived from merge sort and insertion sort. Used in Python 2.3 and up, and Java SE 7.
Insertion sorts
Cycle sort: in-place with theoretically optimal number of writes
Insertion sort: determine where the current item belongs in the list of sorted ones, and insert it there
Library sort
Patience sorting
Shell sort: an attempt to improve insertion sort
Tree sort (binary tree sort): build binary tree, then traverse it to create sorted list
Merge sorts
Merge sort: sort the first and second half of the list separately, then merge the sorted lists
Slowsort
Strand sort
Non-comparison sorts
Bead sort
Bucket sort
Burstsort: build a compact, cache efficient burst trie and then traverse it to create sorted output
Counting sort
Pigeonhole sort
Postman sort: variant of Bucket sort which takes advantage of hierarchical structure
Radix sort: sorts strings letter by letter
Selection sorts
Heapsort: convert the list into a heap, keep removing the largest element from the heap and adding it to the end of the list
Selection sort: pick the smallest of the remaining elements, add it to the end of the sorted list
Smoothsort
Other
Bitonic sorter
Pancake sorting
Spaghetti sort
Topological sort
Unknown class
Samplesort
==== Subsequences ====
Longest common subsequence problem: Find the longest subsequence common to all sequences in a set of sequences
Longest increasing subsequence problem: Find the longest increasing subsequence of a given sequence
RuzzoTompa algorithm: Find all non-overlapping, contiguous, maximal scoring subsequences in a sequence of real numbers
Shortest common supersequence problem: Find the shortest supersequence that contains two or more sequences as subsequences
==== Substrings ====
Kadane's algorithm: finds the contiguous subarray with largest sum in an array of numbers
Longest common substring problem: find the longest string (or strings) that is a substring (or are substrings) of two or more strings
Matching wildcards
Krauss matching wildcards algorithm: an open-source non-recursive algorithm
Rich Salz' wildmat: a widely used open-source recursive algorithm
Substring search
AhoCorasick string matching algorithm: trie based algorithm for finding all substring matches to any of a finite set of strings
BoyerMooreHorspool algorithm: Simplification of BoyerMoore
BoyerMoore string-search algorithm: amortized linear (sublinear in most times) algorithm for substring search
KnuthMorrisPratt algorithm: substring search which bypasses reexamination of matched characters
RabinKarp string search algorithm: searches multiple patterns efficiently
ZhuTakaoka string matching algorithm: a variant of BoyerMoore
Ukkonen's algorithm: a linear-time, online algorithm for constructing suffix trees
== Computational mathematics ==
=== Abstract algebra ===

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Chien search: a recursive algorithm for determining roots of polynomials defined over a finite field
SchreierSims algorithm: computing a base and strong generating set (BSGS) of a permutation group
ToddCoxeter algorithm: Procedure for generating cosets.
=== Computer algebra ===
Buchberger's algorithm: finds a Gröbner basis
CantorZassenhaus algorithm: factor polynomials over finite fields
Faugère F4 algorithm: finds a Gröbner basis (also mentions the F5 algorithm)
Gosper's algorithm: find sums of hypergeometric terms that are themselves hypergeometric terms
KnuthBendix completion algorithm: for rewriting rule systems
Multivariate division algorithm: for polynomials in several indeterminates
Pollard's kangaroo algorithm (also known as Pollard's lambda algorithm): an algorithm for solving the discrete logarithm problem
Polynomial long division: an algorithm for dividing a polynomial by another polynomial of the same or lower degree
Risch algorithm: an algorithm for the calculus operation of indefinite integration (i.e. finding antiderivatives)
=== Geometry ===
Closest pair problem: find the pair of points (from a set of points) with the smallest distance between them
Collision detection algorithms: check for the collision or intersection of two given solids
Cone algorithm: identify surface points
Convex hull algorithms: determining the convex hull of a set of points
Chan's algorithm
Gift wrapping algorithm or Jarvis march
Graham scan
KirkpatrickSeidel algorithm
Quickhull
Euclidean distance transform: computes the distance between every point in a grid and a discrete collection of points.
Geometric hashing: a method for efficiently finding two-dimensional objects represented by discrete points that have undergone an affine transformation
GilbertJohnsonKeerthi distance algorithm: determining the smallest distance between two convex shapes.
Jump-and-Walk algorithm: an algorithm for point location in triangulations
Laplacian smoothing: an algorithm to smooth a polygonal mesh
Line segment intersection: finding whether lines intersect, usually with a sweep line algorithm
BentleyOttmann algorithm
ShamosHoey algorithm
Minimum bounding box algorithms: find the oriented minimum bounding box enclosing a set of points
Nearest neighbor search: find the nearest point or points to a query point
Nesting algorithm: make the most efficient use of material or space
Point in polygon algorithms: tests whether a given point lies within a given polygon
Point set registration algorithms: finds the transformation between two point sets to optimally align them.
Rotating calipers: determine all antipodal pairs of points and vertices on a convex polygon or convex hull.
Shoelace algorithm: determine the area of a polygon whose vertices are described by ordered pairs in the plane
Triangulation
Delaunay triangulation
Chew's second algorithm: create quality constrained Delaunay triangulations
Ruppert's algorithm (also known as Delaunay refinement): create quality Delaunay triangulations
Marching triangles: reconstruct two-dimensional surface geometry from an unstructured point cloud
Polygon triangulation algorithms: decompose a polygon into a set of triangles
Quasitriangulation
Voronoi diagrams, geometric dual of Delaunay triangulation
BowyerWatson algorithm: create voronoi diagram in any number of dimensions
Fortune's Algorithm: create voronoi diagram
=== Number theoretic algorithms ===
Binary GCD algorithm: Efficient way of calculating GCD.
Booth's multiplication algorithm
Chakravala method: a cyclic algorithm to solve indeterminate quadratic equations, including Pell's equation
Discrete logarithm:
Baby-step giant-step
Index calculus algorithm
PohligHellman algorithm
Pollard's rho algorithm for logarithms
Euclidean algorithm: computes the greatest common divisor
Extended Euclidean algorithm: also solves the equation ax + by = c
Integer factorization: breaking an integer into its prime factors
Congruence of squares
Dixon's algorithm
Fermat's factorization method
General number field sieve
Lenstra elliptic curve factorization
Pollard's p 1 algorithm
Pollard's rho algorithm
prime factorization algorithm
Quadratic sieve
Shor's algorithm
Special number field sieve
Trial division
LenstraLenstraLovász algorithm (also known as LLL algorithm): find a short, nearly orthogonal lattice basis in polynomial time
Modular square root: computing square roots modulo a prime number
Berlekamp's root finding algorithm
Cipolla's algorithm
TonelliShanks algorithm
Multiplication algorithms: fast multiplication of two numbers
Karatsuba algorithm
SchönhageStrassen algorithm
ToomCook multiplication
OdlyzkoSchönhage algorithm: calculates nontrivial zeroes of the Riemann zeta function
Primality tests: determining whether a given number is prime
AKS primality test
BailliePSW primality test
Fermat primality test
Lucas primality test
MillerRabin primality test
Sieve of Atkin
Sieve of Eratosthenes
Sieve of Sundaram
=== Numerical algorithms ===
==== Differential equation solving ====
Backward Euler method
Euler method
Linear multistep methods
Multigrid methods (MG methods), a group of algorithms for solving differential equations using a hierarchy of discretizations
Partial differential equation:
CrankNicolson method for diffusion equations
Finite difference method
LaxWendroff for wave equations
RungeKutta methods
Euler integration
Trapezoidal rule (differential equations)
Verlet integration (French pronunciation: [vɛʁˈlɛ]): integrate Newton's equations of motion
==== Elementary and special functions ====

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Computation of π:
BaileyBorweinPlouffe formula: (BBP formula) a spigot algorithm for the computation of the nth binary digit of π
Borwein's algorithm: an algorithm to calculate the value of 1/π
Chudnovsky algorithm: a fast method for calculating the digits of π
GaussLegendre algorithm: computes the digits of pi
Division algorithms: for computing quotient and/or remainder of two numbers
Goldschmidt division
Long division
NewtonRaphson division: uses Newton's method to find the reciprocal of D, and multiply that reciprocal by N to find the final quotient Q.
Non-restoring division
Restoring division
SRT division
Exponentiation:
Addition-chain exponentiation: exponentiation by positive integer powers that requires a minimal number of multiplications
Exponentiating by squaring: an algorithm used for the fast computation of large integer powers of a number
Hyperbolic and Trigonometric Functions:
BKM algorithm: computes elementary functions using a table of logarithms
CORDIC: computes hyperbolic and trigonometric functions using a table of arctangents
Montgomery reduction: an algorithm that allows modular arithmetic to be performed efficiently when the modulus is large
Multiplication algorithms: fast multiplication of two numbers
Booth's multiplication algorithm: a multiplication algorithm that multiplies two signed binary numbers in two's complement notation
Fürer's algorithm: an integer multiplication algorithm for very large numbers possessing a very low asymptotic complexity
Karatsuba algorithm: an efficient procedure for multiplying large numbers
SchönhageStrassen algorithm: an asymptotically fast multiplication algorithm for large integers
ToomCook multiplication: (Toom3) a multiplication algorithm for large integers
Multiplicative inverse Algorithms: for computing a number's multiplicative inverse (reciprocal).
Newton's method
Rounding functions: the classic ways to round numbers
Spigot algorithm: a way to compute the value of a mathematical constant without knowing preceding digits
Square and Nth root of a number:
Alpha max plus beta min algorithm: an approximation of the square-root of the sum of two squares
Methods of computing square roots
nth root algorithm
Summation:
Binary splitting: a divide and conquer technique which speeds up the numerical evaluation of many types of series with rational terms
Kahan summation algorithm: a more accurate method of summing floating-point numbers
Unrestricted algorithm
==== Geometric ====
Filtered back-projection: efficiently computes the inverse 2-dimensional Radon transform.
Level set method (LSM): a numerical technique for tracking interfaces and shapes
==== Interpolation and extrapolation ====
Birkhoff interpolation: an extension of polynomial interpolation
Cubic interpolation
Hermite interpolation
Lagrange interpolation: interpolation using Lagrange polynomials
Linear interpolation: a method of curve fitting using linear polynomials
Monotone cubic interpolation: a variant of cubic interpolation that preserves monotonicity of the data set being interpolated.
Multivariate interpolation
Bicubic interpolation: a generalization of cubic interpolation to two dimensions
Bilinear interpolation: an extension of linear interpolation for interpolating functions of two variables on a regular grid
Lanczos resampling ("Lanzosh"): a multivariate interpolation method used to compute new values for any digitally sampled data
Nearest-neighbor interpolation
Tricubic interpolation: a generalization of cubic interpolation to three dimensions
Pareto interpolation: a method of estimating the median and other properties of a population that follows a Pareto distribution.
Polynomial interpolation
Neville's algorithm
Spline interpolation: Reduces error with Runge's phenomenon.
De Boor algorithm: B-splines
De Casteljau's algorithm: Bézier curves
Trigonometric interpolation
==== Linear algebra ====
Eigenvalue algorithms
Arnoldi iteration
Inverse iteration
Jacobi method
Lanczos iteration
Power iteration
QR algorithm
Rayleigh quotient iteration
GramSchmidt process: orthogonalizes a set of vectors
Krylov methods (for large sparse matrix problems; third most-important numerical method class of the 20th century as ranked by SISC; after fast-fourier and fast-multipole)
Matrix multiplication algorithms
Cannon's algorithm: a distributed algorithm for matrix multiplication especially suitable for computers laid out in an N × N mesh
CoppersmithWinograd algorithm: square matrix multiplication
Freivalds' algorithm: a randomized algorithm used to verify matrix multiplication
Strassen algorithm: faster matrix multiplication
Solving systems of linear equations
Biconjugate gradient method: solves systems of linear equations
Conjugate gradient: an algorithm for the numerical solution of particular systems of linear equations
GaussJordan elimination: solves systems of linear equations
GaussSeidel method: solves systems of linear equations iteratively
Gaussian elimination
Levinson recursion: solves equation involving a Toeplitz matrix
Stone's method: also known as the strongly implicit procedure or SIP, is an algorithm for solving a sparse linear system of equations
Successive over-relaxation (SOR): method used to speed up convergence of the GaussSeidel method
Tridiagonal matrix algorithm (Thomas algorithm): solves systems of tridiagonal equations
SMAWK Algorithm
Sparse matrix algorithms
CuthillMcKee algorithm: reduce the bandwidth of a symmetric sparse matrix
Minimum degree algorithm: permute the rows and columns of a symmetric sparse matrix before applying the Cholesky decomposition
Symbolic Cholesky decomposition: Efficient way of storing sparse matrix
==== Monte Carlo ====
Gibbs sampling: generates a sequence of samples from the joint probability distribution of two or more random variables
Hybrid Monte Carlo: generates a sequence of samples using Hamiltonian weighted Markov chain Monte Carlo, from a probability distribution which is difficult to sample directly.
MetropolisHastings algorithm: used to generate a sequence of samples from the probability distribution of one or more variables
Wang and Landau algorithm: an extension of MetropolisHastings algorithm sampling
==== Numerical integration ====
MISER algorithm: Monte Carlo simulation, numerical integration
==== Root finding ====
Bisection method
False position method: and Illinois method: 2-point, bracketing
Halley's method: uses first and second derivatives
ITP method: minmax optimal and superlinear convergence simultaneously
Muller's method: 3-point, quadratic interpolation
Newton's method: finds zeros of functions with calculus
Ridder's method: 3-point, exponential scaling
Secant method: 2-point, 1-sided

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=== Optimization algorithms ===
Hybrid Algorithms
Alphabeta pruning: search to reduce number of nodes in minimax algorithm
A hybrid BFGS-Like method (see more https://doi.org/10.1016/j.cam.2024.115857)
Branch and bound
Bruss algorithm: see odds algorithm
Chain matrix multiplication
Combinatorial optimization: optimization problems where the set of feasible solutions is discrete
Greedy randomized adaptive search procedure (GRASP): successive constructions of a greedy randomized solution and subsequent iterative improvements of it through a local search
Hungarian method: a combinatorial optimization algorithm which solves the assignment problem in polynomial time
Conjugate gradient methods (see more https://doi.org/10.1016/j.jksus.2022.101923)
Constraint satisfaction
AC-3 algorithm general algorithms for the constraint satisfaction
Chaff algorithm: an algorithm for solving instances of the Boolean satisfiability problem
DavisPutnam algorithm: check the validity of a first-order logic formula
Difference map algorithm general algorithms for the constraint satisfaction
DavisPutnamLogemannLoveland algorithm (DPLL): an algorithm for deciding the satisfiability of propositional logic formula in conjunctive normal form, i.e. for solving the CNF-SAT problem
Exact cover problem
Min conflicts algorithm general algorithms for the constraint satisfaction
Algorithm X: a nondeterministic algorithm
Dancing Links: an efficient implementation of Algorithm X
Cross-entropy method: a general Monte Carlo approach to combinatorial and continuous multi-extremal optimization and importance sampling
Differential evolution
Dynamic Programming: problems exhibiting the properties of overlapping subproblems and optimal substructure
Ellipsoid method: is an algorithm for solving convex optimization problems
Evolutionary computation: optimization inspired by biological mechanisms of evolution
Evolution strategy
Gene expression programming
Genetic algorithms
Fitness proportionate selection also known as roulette-wheel selection
Stochastic universal sampling
Tournament selection
Truncation selection
Memetic algorithm
Swarm intelligence
Ant colony optimization
Bees algorithm: a search algorithm which mimics the food foraging behavior of swarms of honey bees
Particle swarm
Frank-Wolfe algorithm: an iterative first-order optimization algorithm for constrained convex optimization
Golden-section search: an algorithm for finding the maximum of a real function
Gradient descent
Grid Search
Harmony search (HS): a metaheuristic algorithm mimicking the improvisation process of musicians
A hybrid HS-LS conjugate gradient algorithm (see https://doi.org/10.1016/j.cam.2023.115304)
Interior point method
Line search
Linear programming
Benson's algorithm: an algorithm for solving linear vector optimization problems
DantzigWolfe decomposition: an algorithm for solving linear programming problems with special structure
Delayed column generation
Integer linear programming: solve linear programming problems where some or all the unknowns are restricted to integer values
Branch and cut
Cutting-plane method
Karmarkar's algorithm: The first reasonably efficient algorithm that solves the linear programming problem in polynomial time.
Simplex algorithm: an algorithm for solving linear programming problems
Local search: a metaheuristic for solving computationally hard optimization problems
Random-restart hill climbing
Tabu search
Minimax used in game programming
Nearest neighbor search (NNS): find closest points in a metric space
Best Bin First: find an approximate solution to the nearest neighbor search problem in very-high-dimensional spaces
Newton's method in optimization
Nonlinear optimization
BFGS method: a nonlinear optimization algorithm
GaussNewton algorithm: an algorithm for solving nonlinear least squares problems
LevenbergMarquardt algorithm: an algorithm for solving nonlinear least squares problems
NelderMead method (downhill simplex method): a nonlinear optimization algorithm
Odds algorithm (Bruss algorithm): Finds the optimal strategy to predict a last specific event in a random sequence event
Random Search
Simulated annealing
Stochastic tunneling
Subset sum algorithm
== Computational science ==
=== Astronomy ===
Doomsday algorithm: day of the week
various Easter algorithms are used to calculate the day of Easter
Zeller's congruence is an algorithm to calculate the day of the week for any Julian or Gregorian calendar date
=== Bioinformatics ===
Basic Local Alignment Search Tool also known as BLAST: an algorithm for comparing primary biological sequence information
Bloom Filter: probabilistic data structure used to test for the existence of an element within a set. Primarily used in bioinformatics to test for the existence of a k-mer in a sequence or sequences.
Kabsch algorithm: calculate the optimal alignment of two sets of points in order to compute the root mean squared deviation between two protein structures.
Maximum parsimony (phylogenetics): an algorithm for finding the simplest phylogenetic tree to explain a given character matrix.
Sorting by signed reversals: an algorithm for understanding genomic evolution.
UPGMA: a distance-based phylogenetic tree construction algorithm.
Velvet: a set of algorithms manipulating de Bruijn graphs for genomic sequence assembly
=== Geoscience ===
Geohash: a public domain algorithm that encodes a decimal latitude/longitude pair as a hash string
Vincenty's formulae: a fast algorithm to calculate the distance between two latitude/longitude points on an ellipsoid
=== Linguistics ===
Lesk algorithm: word sense disambiguation
Stemming algorithm: a method of reducing words to their stem, base, or root form
Sukhotin's algorithm: a statistical classification algorithm for classifying characters in a text as vowels or consonants
=== Medicine ===
ESC algorithm for the diagnosis of heart failure
Manning Criteria for irritable bowel syndrome
Pulmonary embolism diagnostic algorithms
Texas Medication Algorithm Project
=== Physics ===
Constraint algorithm: a class of algorithms for satisfying constraints for bodies that obey Newton's equations of motion
Demon algorithm: a Monte Carlo method for efficiently sampling members of a microcanonical ensemble with a given energy
Featherstone's algorithm: computes the effects of forces applied to a structure of joints and links
Glauber dynamics: a method for simulating the Ising Model on a computer
Ground state approximation
Variational method
Ritz method
n-body problems
BarnesHut simulation: Solves the n-body problem in an approximate way that has the order O(n log n) instead of O(n2) as in a direct-sum simulation.
Fast multipole method (FMM): speeds up the calculation of long-ranged forces
Rainflow-counting algorithm: Reduces a complex stress history to a count of elementary stress-reversals for use in fatigue analysis
Sweep and prune: a broad phase algorithm used during collision detection to limit the number of pairs of solids that need to be checked for collision
VEGAS algorithm: a method for reducing error in Monte Carlo simulations
=== Statistics ===

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Algorithms for calculating variance: avoiding instability and numerical overflow
Approximate counting algorithm: allows counting large number of events in a small register
Bayesian statistics
Nested sampling algorithm: a computational approach to the problem of comparing models in Bayesian statistics
Clustering algorithms
Average-linkage clustering: a simple agglomerative clustering algorithm
Canopy clustering algorithm: an unsupervised pre-clustering algorithm related to the K-means algorithm
Chinese whispers
Complete-linkage clustering: a simple agglomerative clustering algorithm
DBSCAN: a density based clustering algorithm
Expectation-maximization algorithm
Fuzzy clustering: a class of clustering algorithms where each point has a degree of belonging to clusters
FLAME clustering (Fuzzy clustering by Local Approximation of MEmberships): define clusters in the dense parts of a dataset and perform cluster assignment solely based on the neighborhood relationships among objects
Fuzzy c-means
k-means clustering: cluster objects based on attributes into partitions
k-means++: a variation of this, using modified random seeds
k-medoids: similar to k-means, but chooses datapoints or medoids as centers
KHOPCA clustering algorithm: a local clustering algorithm, which produces hierarchical multi-hop clusters in static and mobile environments.
LindeBuzoGray algorithm: a vector quantization algorithm to derive a good codebook
Lloyd's algorithm (Voronoi iteration or relaxation): group data points into a given number of categories, a popular algorithm for k-means clustering
OPTICS: a density based clustering algorithm with a visual evaluation method
Single-linkage clustering: a simple agglomerative clustering algorithm
SUBCLU: a subspace clustering algorithm
WACA clustering algorithm: a local clustering algorithm with potentially multi-hop structures; for dynamic networks
Ward's method: an agglomerative clustering algorithm, extended to more general LanceWilliams algorithms
Estimation Theory
Expectation-maximization algorithm A class of related algorithms for finding maximum likelihood estimates of parameters in probabilistic models
Ordered subset expectation maximization (OSEM): used in medical imaging for positron emission tomography, single-photon emission computed tomography and X-ray computed tomography.
Kalman filter: estimate the state of a linear dynamic system from a series of noisy measurements
Odds algorithm (Bruss algorithm) Optimal online search for distinguished value in sequential random input
False nearest neighbor algorithm (FNN) estimates fractal dimension
Hidden Markov model
BaumWelch algorithm: computes maximum likelihood estimates and posterior mode estimates for the parameters of a hidden Markov model
Forwardbackward algorithm: a dynamic programming algorithm for computing the probability of a particular observation sequence
Viterbi algorithm: find the most likely sequence of hidden states in a hidden Markov model
Partial least squares regression: finds a linear model describing some predicted variables in terms of other observable variables
Queuing theory
Buzen's algorithm: an algorithm for calculating the normalization constant G(K) in the GordonNewell theorem
RANSAC (an abbreviation for "RANdom SAmple Consensus"): an iterative method to estimate parameters of a mathematical model from a set of observed data which contains outliers
Scoring algorithm: is a form of Newton's method used to solve maximum likelihood equations numerically
Yamartino method: calculate an approximation to the standard deviation σθ of wind direction θ during a single pass through the incoming data
Ziggurat algorithm: generates random numbers from a non-uniform distribution
== Computer science ==
=== Computer architecture ===
Tomasulo algorithm: allows sequential instructions that would normally be stalled due to certain dependencies to execute non-sequentially
=== Computer graphics ===
Binary space partitioning
Clipping
Line clipping
CohenSutherland
CyrusBeck
Fast-clipping
LiangBarsky
NichollLeeNicholl
Polygon clipping
SutherlandHodgman
Vatti
WeilerAtherton
Contour lines and Isosurfaces
Marching cubes: extract a polygonal mesh of an isosurface from a three-dimensional scalar field (sometimes called voxels)
Marching squares: generates contour lines for a two-dimensional scalar field
Marching tetrahedrons: an alternative to Marching cubes
Discrete Green's theorem: an algorithm for computing double integral over a generalized rectangular domain in constant time. It is a natural extension to the summed area table algorithm
Flood fill: fills a connected region of a multi-dimensional array with a specified symbol
Global illumination algorithms: Considers direct illumination and reflection from other objects.
Ambient occlusion
Beam tracing
Cone tracing
Image-based lighting
Metropolis light transport
Path tracing
Photon mapping
Radiosity
Ray tracing
Hidden-surface removal or visual surface determination
Newell's algorithm: eliminate polygon cycles in the depth sorting required in hidden-surface removal
Painter's algorithm: detects visible parts of a 3-dimensional scenery
Scanline rendering: constructs an image by moving an imaginary line over the image
Warnock algorithm
Line drawing: graphical algorithm for approximating a line segment on discrete graphical media.
Bresenham's line algorithm: plots points of a 2-dimensional array to form a straight line between 2 specified points (uses decision variables)
DDA line algorithm: plots points of a 2-dimensional array to form a straight line between specified points
Xiaolin Wu's line algorithm: algorithm for line antialiasing.
Midpoint circle algorithm: an algorithm used to determine the points needed for drawing a circle
RamerDouglasPeucker algorithm: Given a 'curve' composed of line segments to find a curve not too dissimilar but that has fewer points
Shading
Gouraud shading: an algorithm to simulate the differing effects of light and colour across the surface of an object in 3D computer graphics
Phong shading: an algorithm to interpolate surface normal-vectors for surface shading in 3D computer graphics
Slerp (spherical linear interpolation): quaternion interpolation for the purpose of animating 3D rotation
Summed area table (also known as an integral image): an algorithm for computing the sum of values in a rectangular subset of a grid in constant time
=== Cryptography ===

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Asymmetric (public key) encryption:
ElGamal
Elliptic curve cryptography
MAE1
NTRUEncrypt
RSA
Digital signatures (asymmetric authentication):
DSA, and its variants:
ECDSA and Deterministic ECDSA
EdDSA (Ed25519)
RSA
Cryptographic hash functions (see also the section on message authentication codes):
BLAKE
MD5 Note that there is now a method of generating collisions for MD5
RIPEMD-160
SHA-1 Note that there is now a method of generating collisions for SHA-1
SHA-2 (SHA-224, SHA-256, SHA-384, SHA-512)
SHA-3 (SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128, SHAKE256)
Tiger (TTH), usually used in Tiger tree hashes
WHIRLPOOL
Cryptographically secure pseudo-random number generators
Blum Blum Shub based on the hardness of factorization
Fortuna, intended as an improvement on Yarrow algorithm
Linear-feedback shift register (note: many LFSR-based algorithms are weak or have been broken)
Yarrow algorithm
Key exchange
DiffieHellman key exchange
Elliptic-curve DiffieHellman (ECDH)
Key derivation functions, often used for password hashing and key stretching
Argon2
bcrypt
PBKDF2
scrypt
Message authentication codes (symmetric authentication algorithms, which take a key as a parameter):
HMAC: keyed-hash message authentication
Poly1305
SipHash
Secret sharing, secret splitting, key splitting, M of N algorithms
Blakey's scheme
Shamir's secret sharing
Symmetric (secret key) encryption:
Advanced Encryption Standard (AES), winner of NIST competition, also known as Rijndael
Blowfish
ChaCha20 updated variant of Salsa20
Data Encryption Standard (DES), sometimes DE Algorithm, winner of NBS selection competition, replaced by AES for most purposes
IDEA
RC4 (cipher)
Salsa20
Threefish
Tiny Encryption Algorithm (TEA)
Twofish
Post-quantum cryptography
Proof-of-work algorithms
=== Digital logic ===
Boolean minimization
Espresso heuristic logic minimizer: a fast algorithm for Boolean function minimization
Petrick's method: another algorithm for Boolean simplification
QuineMcCluskey algorithm: also called as Q-M algorithm, programmable method for simplifying the Boolean equations
=== Machine learning and statistical classification ===
AlmeidaPineda recurrent backpropagation: Adjust a matrix of synaptic weights to generate desired outputs given its inputs
ALOPEX: a correlation-based machine-learning algorithm
Association rule learning: discover interesting relations between variables, used in data mining
Apriori algorithm
Eclat algorithm
FP-growth algorithm
One-attribute rule
Zero-attribute rule
Boosting (meta-algorithm): Use many weak learners to boost effectiveness
AdaBoost: adaptive boosting
BrownBoost: a boosting algorithm that may be robust to noisy datasets
LogitBoost: logistic regression boosting
LPBoost: linear programming boosting
Bootstrap aggregating (bagging): technique to improve stability and classification accuracy
Clustering: a class of unsupervised learning algorithms for grouping and bucketing related input vector
Computer Vision
Grabcut based on Graph cuts
Decision Trees
C4.5 algorithm: an extension to ID3
ID3 algorithm (Iterative Dichotomiser 3): use heuristic to generate small decision trees
k-nearest neighbors (k-NN): a non-parametric method for classifying objects based on closest training examples in the feature space
LindeBuzoGray algorithm: a vector quantization algorithm used to derive a good codebook
Locality-sensitive hashing (LSH): a method of performing probabilistic dimension reduction of high-dimensional data
Naive Bayes classifier: a family of probabilistic classifiers based on Bayes' theorem
Neural Network
Backpropagation: a supervised learning method which requires a teacher that knows, or can calculate, the desired output for any given input
Hopfield net: a Recurrent neural network in which all connections are symmetric
Perceptron: the simplest kind of feedforward neural network: a linear classifier.
Pulse-coupled neural networks (PCNN): Neural models proposed by modeling a cat's visual cortex and developed for high-performance biomimetic image processing.
Radial basis function network: an artificial neural network that uses radial basis functions as activation functions
Self-organizing map: an unsupervised network that produces a low-dimensional representation of the input space of the training samples
Random forest: classify using many decision trees
Reinforcement learning:
Q-learning: learns an action-value function that gives the expected utility of taking a given action in a given state and following a fixed policy thereafter
StateActionRewardStateAction (SARSA): learn a Markov decision process policy
Temporal difference learning
Relevance-Vector Machine (RVM): similar to SVM, but provides probabilistic classification
Supervised learning: Learning by examples (labelled data-set split into training-set and test-set)
Support Vector Machine (SVM): a set of methods which divide multidimensional data by finding a dividing hyperplane with the maximum margin between the two sets
Structured SVM: allows training of a classifier for general structured output labels.
Winnow algorithm: related to the perceptron, but uses a multiplicative weight-update scheme
=== Programming language theory ===
C3 linearization: an algorithm used primarily to obtain a consistent linearization of a multiple inheritance hierarchy in object-oriented programming
Chaitin's algorithm: a bottom-up, graph coloring register allocation algorithm that uses cost/degree as its spill metric
HindleyMilner type inference algorithm
Rete algorithm: an efficient pattern matching algorithm for implementing production rule systems
Sethi-Ullman algorithm: generates optimal code for arithmetic expressions
==== Parsing ====
CYK algorithm: an O(n3) algorithm for parsing context-free grammars in Chomsky normal form
Earley parser: another O(n3) algorithm for parsing any context-free grammar
GLR parser: an algorithm for parsing any context-free grammar by Masaru Tomita. It is tuned for deterministic grammars, on which it performs almost linear time and O(n3) in worst case.
Inside-outside algorithm: an O(n3) algorithm for re-estimating production probabilities in probabilistic context-free grammars
Lexical analysis
LL parser: a relatively simple linear time parsing algorithm for a limited class of context-free grammars
LR parser: A more complex linear time parsing algorithm for a larger class of context-free grammars. Variants:
Canonical LR parser
LALR (look-ahead LR) parser
Operator-precedence parser
Simple LR parser
Simple precedence parser
Packrat parser: a linear time parsing algorithm supporting some context-free grammars and parsing expression grammars
Pratt parser
Recursive descent parser: a top-down parser suitable for LL(k) grammars
Shunting-yard algorithm: converts an infix-notation math expression to postfix
=== Quantum algorithms ===
DeutschJozsa algorithm: criterion of balance for Boolean function
Grover's algorithm: provides quadratic speedup for many search problems
Shor's algorithm: provides exponential speedup (relative to currently known non-quantum algorithms) for factoring a number
Simon's algorithm: provides a provably exponential speedup (relative to any non-quantum algorithm) for a black-box problem
=== Theory of computation and automata ===

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Hopcroft's algorithm, Moore's algorithm, and Brzozowski's algorithm: algorithms for minimizing the number of states in a deterministic finite automaton
Powerset construction: algorithm to convert nondeterministic automaton to deterministic automaton.
TarskiKuratowski algorithm: a non-deterministic algorithm which provides an upper bound for the complexity of formulas in the arithmetical hierarchy and analytical hierarchy
== Information theory and signal processing ==
=== Coding theory ===
==== Error detection and correction ====
BCH Codes
BerlekampMassey algorithm
PetersonGorensteinZierler algorithm
ReedSolomon error correction
BCJR algorithm: decoding of error correcting codes defined on trellises (principally convolutional codes)
Forward error correction
Gray code
Hamming codes
Hamming(7,4): a Hamming code that encodes 4 bits of data into 7 bits by adding 3 parity bits
Hamming distance: sum number of positions which are different
Hamming weight (population count): find the number of 1 bits in a binary word
Redundancy checks
Adler-32
Cyclic redundancy check
Damm algorithm
Fletcher's checksum
Longitudinal redundancy check (LRC)
Luhn algorithm: a method of validating identification numbers
Luhn mod N algorithm: extension of Luhn to non-numeric characters
Parity: simple/fast error detection technique
Verhoeff algorithm
==== Lossless compression algorithms ====
BurrowsWheeler transform: preprocessing useful for improving lossless compression
Context tree weighting
Delta encoding: aid to compression of data in which sequential data occurs frequently
Dynamic Markov compression: Compression using predictive arithmetic coding
Dictionary coders
Byte pair encoding (BPE)
Deflate
LempelZiv
LZ77 and LZ78
LempelZiv Jeff Bonwick (LZJB)
LempelZivMarkov chain algorithm (LZMA)
LempelZivOberhumer (LZO): speed oriented
LempelZiv Ross Williams (LZRW)
LempelZivStac (LZS)
LempelZivStorerSzymanski (LZSS)
LempelZivWelch (LZW)
LZWL: syllable-based variant
LZX
Entropy encoding: coding scheme that assigns codes to symbols so as to match code lengths with the probabilities of the symbols
Arithmetic coding: advanced entropy coding
Range encoding: same as arithmetic coding, but looked at in a slightly different way
Huffman coding: simple lossless compression taking advantage of relative character frequencies
Adaptive Huffman coding: adaptive coding technique based on Huffman coding
Package-merge algorithm: Optimizes Huffman coding subject to a length restriction on code strings
ShannonFano coding
ShannonFanoElias coding: precursor to arithmetic encoding
Entropy coding with known entropy characteristics
Golomb coding: form of entropy coding that is optimal for alphabets following geometric distributions
Rice coding: form of entropy coding that is optimal for alphabets following geometric distributions
Truncated binary encoding
Unary coding: code that represents a number n with n ones followed by a zero
Universal codes: encodes positive integers into binary code words
Elias delta, gamma, and omega coding
Exponential-Golomb coding
Fibonacci coding
Levenshtein coding
Fast Efficient & Lossless Image Compression System (FELICS): a lossless image compression algorithm
Incremental encoding: delta encoding applied to sequences of strings
Prediction by partial matching (PPM): an adaptive statistical data compression technique based on context modeling and prediction
Run-length encoding: lossless data compression taking advantage of strings of repeated characters
SEQUITUR algorithm: lossless compression by incremental grammar inference on a string
==== Lossy compression algorithms ====
3Dc: a lossy data compression algorithm for normal maps
Audio and Speech compression
A-law algorithm: standard companding algorithm
Code-excited linear prediction (CELP): low bit-rate speech compression
Linear predictive coding (LPC): lossy compression by representing the spectral envelope of a digital signal of speech in compressed form
Mu-law algorithm: standard analog signal compression or companding algorithm
Warped Linear Predictive Coding (WLPC)
Image compression
Block Truncation Coding (BTC): a type of lossy image compression technique for greyscale images
Embedded Zerotree Wavelet (EZW)
Fast Cosine Transform algorithms (FCT algorithms): computes Discrete Cosine Transform (DCT) efficiently
Fractal compression: method used to compress images using fractals
Set Partitioning in Hierarchical Trees (SPIHT)
Wavelet compression: form of data compression well suited for image compression (sometimes also video compression and audio compression)
Transform coding: type of data compression for "natural" data like audio signals or photographic images
Vector quantization: technique often used in lossy data compression
TurboQuant: online vector quantization algorithm for lossy compression of high-dimensional vectors for LLMs
Video compression
=== Digital signal processing ===
Adaptive-additive algorithm (AA algorithm): find the spatial frequency phase of an observed wave source
Discrete Fourier transform: determines the frequencies contained in a (segment of a) signal
Bluestein's FFT algorithm
Bruun's FFT algorithm
CooleyTukey FFT algorithm
Fast Fourier transform
Prime-factor FFT algorithm
Rader's FFT algorithm
Fast folding algorithm: an efficient algorithm for the detection of approximately periodic events within time series data
GerchbergSaxton algorithm: Phase retrieval algorithm for optical planes
Goertzel algorithm: identify a particular frequency component in a signal. Can be used for DTMF digit decoding.
Karplus-Strong string synthesis: physical modelling synthesis to simulate the sound of a hammered or plucked string or some types of percussion
==== Image processing ====
Adaptive histogram equalization: histogram equalization which adapts to local changes in contrast - Contrast Enhancement
Blind deconvolution: image de-blurring algorithm when point spread function is unknown.
Connected-component labeling: find and label disjoint regions
Dithering and half-toning
Error diffusion
FloydSteinberg dithering
Ordered dithering
Riemersma dithering
Elser difference-map algorithm: a search algorithm for general constraint satisfaction problems. Originally used for X-Ray diffraction microscopy
Feature detection
Canny edge detector: detect a wide range of edges in images
Generalised Hough transform
Hough transform
MarrHildreth algorithm: an early edge detection algorithm
SIFT (Scale-invariant feature transform): is an algorithm to detect and describe local features in images.
SURF (Speeded Up Robust Features): is a robust local feature detector, first presented by Herbert Bay et al. in 2006, that can be used in computer vision tasks like object recognition or 3D reconstruction. It is partly inspired by the SIFT descriptor. The standard version of SURF is several times faster than SIFT and claimed by its authors to be more robust against different image transformations than SIFT.
Histogram equalization: use histogram to improve image contrast - Contrast Enhancement
RichardsonLucy deconvolution: image de-blurring algorithm
Median filtering
Seam carving: content-aware image resizing algorithm
Segmentation: partition a digital image into two or more regions
GrowCut algorithm: an interactive segmentation algorithm
Random walker algorithm
Region growing
Watershed transformation: a class of algorithms based on the watershed analogy
== Software engineering ==

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Cache algorithms
CHS conversion: converting between disk addressing systems
Double dabble: convert binary numbers to BCD
Hash function: convert a large, possibly variable-sized amount of data into a small datum, usually a single integer that may serve as an index into an array
FowlerNollVo hash function: fast with low collision rate
Pearson hashing: computes 8-bit value only, optimized for 8-bit computers
Zobrist hashing: used in the implementation of transposition tables
Unicode collation algorithm
Xor swap algorithm: swaps the values of two variables without using a buffer
== Database algorithms ==
Algorithms for Recovery and Isolation Exploiting Semantics (ARIES): transaction recovery
Join algorithms
Block nested loop
Hash join
Nested loop join
Sort-Merge Join
The Chase
== Distributed systems algorithms ==
Clock synchronization
Berkeley algorithm
Cristian's algorithm
Intersection algorithm
Marzullo's algorithm
Consensus (computer science): agreeing on a single value or history among unreliable processors
ChandraToueg consensus algorithm
Paxos algorithm
Raft (computer science)
Detection of Process Termination
Dijkstra-Scholten algorithm
Huang's algorithm
Lamport ordering: a partial ordering of events based on the happened-before relation
Leader election: a method for dynamically selecting a coordinator
Bully algorithm
Mutual exclusion
Lamport's Distributed Mutual Exclusion Algorithm
Naimi-Trehel's log(n) Algorithm
Maekawa's Algorithm
Raymond's Algorithm
RicartAgrawala Algorithm
Snapshot algorithm: record a consistent global state for an asynchronous system
ChandyLamport algorithm
Vector clocks: generate a partial ordering of events in a distributed system and detect causality violations
=== Memory allocation and deallocation algorithms ===
Buddy memory allocation: an algorithm to allocate memory such with less fragmentation
Garbage collectors
Cheney's algorithm: an improvement on the Semi-space collector
Generational garbage collector: Fast garbage collectors that segregate memory by age
Mark-compact algorithm: a combination of the mark-sweep algorithm and Cheney's copying algorithm
Mark and sweep
Semi-space collector: an early copying collector
Reference counting
== Networking ==
Karn's algorithm: addresses the problem of getting accurate estimates of the round-trip time for messages when using TCP
Luleå algorithm: a technique for storing and searching internet routing tables efficiently
Network congestion
Exponential backoff
Nagle's algorithm: improve the efficiency of TCP/IP networks by coalescing packets
Truncated binary exponential backoff
== Operating systems algorithms ==
Banker's algorithm: algorithm used for deadlock avoidance
Page replacement algorithms: for selecting the victim page under low memory conditions
Adaptive replacement cache: better performance than LRU
Clock with Adaptive Replacement (CAR): a page replacement algorithm with performance comparable to adaptive replacement cache
=== Process synchronization ===
Dekker's algorithm
Lamport's Bakery algorithm
Peterson's algorithm
=== Scheduling ===
Earliest deadline first scheduling
Fair-share scheduling
Least slack time scheduling
List scheduling
Multi level feedback queue
Rate-monotonic scheduling
Round-robin scheduling
Shortest job next
Shortest remaining time
Top-nodes algorithm: resource calendar management
=== I/O scheduling ===
==== Disk scheduling ====
Elevator algorithm: Disk scheduling algorithm that works like an elevator.
Shortest seek first: Disk scheduling algorithm to reduce seek time.
== See also ==
List of artificial intelligence algorithms
List of data structures
List of machine learning algorithms
List of pathfinding algorithms
List of algorithm general topics
List of terms relating to algorithms and data structures
Heuristic
== References ==

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title: "List of aperiodic sets of tiles"
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In geometry, a tiling is a partition of the plane (or any other geometric setting) into closed sets (called tiles), without gaps or overlaps (other than the boundaries of the tiles). A tiling is considered periodic if there exist translations in two independent directions which map the tiling onto itself. Such a tiling is composed of a single fundamental unit or primitive cell which repeats endlessly and regularly in two independent directions. An example of such a tiling is shown in the adjacent diagram (see the image description for more information). A tiling that cannot be constructed from a single primitive cell is called nonperiodic. If a given set of tiles allows only nonperiodic tilings, then this set of tiles is called aperiodic. The tilings obtained from an aperiodic set of tiles are often called aperiodic tilings, though strictly speaking it is the tiles themselves that are aperiodic. (The tiling itself is said to be "nonperiodic".)
The first table explains the abbreviations used in the second table. The second table contains all known aperiodic sets of tiles and gives some additional basic information about each set. This list of tiles is still incomplete.
== Explanations ==
== List ==
== References ==
== External links ==
Stephens P. W., Goldman A. I. The Structure of Quasicrystals
Levine D., Steinhardt P. J. Quasicrystals I Definition and structure
Tilings Encyclopedia

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This is a list of axioms as that term is understood in mathematics. In epistemology, the word axiom is understood differently; see axiom and self-evidence. Individual axioms are almost always part of a larger axiomatic system.
== ZF (the ZermeloFraenkel axioms without the axiom of choice) ==
Together with the axiom of choice (see below), these are the de facto standard axioms for contemporary mathematics or set theory. They can be easily adapted to analogous theories, such as mereology.
Axiom of extensionality
Axiom of empty set
Axiom of pairing
Axiom of union
Axiom of infinity
Axiom schema of replacement
Axiom of power set
Axiom of regularity
Axiom schema of specification
See also Zermelo set theory.
== Axiom of choice ==
With the ZermeloFraenkel axioms above, this makes up the system ZFC in which most mathematics is potentially formalisable.
=== Equivalents of AC ===
Hausdorff maximality theorem
Well-ordering theorem
Zorn's lemma
=== Stronger than AC ===
Axiom of global choice
=== Weaker than AC ===
Axiom of countable choice
Axiom of dependent choice
Boolean prime ideal theorem
Axiom of uniformization
=== Alternates incompatible with AC ===
Axiom of real determinacy
== Other axioms of mathematical logic ==
Von NeumannBernaysGödel axioms
Continuum hypothesis and its generalization
Freiling's axiom of symmetry
Axiom of determinacy
Axiom of projective determinacy
Martin's axiom
Axiom of constructibility
Rank-into-rank
KripkePlatek axioms
Diamond principle
== Geometry ==
Parallel postulate
Birkhoff's axioms (4 axioms)
Hilbert's axioms (20 axioms)
Tarski's axioms (10 axioms and 1 schema)
== Other axioms ==
Axiom of Archimedes (real number)
Axiom of countability (topology)
Diracvon Neumann axioms
Fundamental axiom of analysis (real analysis)
Gluing axiom (sheaf theory)
HaagKastler axioms (quantum field theory)
Huzita's axioms (origami)
Kuratowski closure axioms (topology)
Peano's axioms (natural numbers)
Probability axioms
Separation axiom (topology)
Wightman axioms (quantum field theory)
Action axiom (praxeology)
== See also ==
Axiomatic quantum field theory
Minimal axioms for Boolean algebra

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This is a list of calculus topics.
== Limits ==
Limit (mathematics)
Limit of a function
One-sided limit
Limit of a sequence
Indeterminate form
Orders of approximation
(ε, δ)-definition of limit
Continuous function
== Differential calculus ==
Derivative
Notation
Newton's notation for differentiation
Leibniz's notation for differentiation
Simplest rules
Derivative of a constant
Sum rule in differentiation
Constant factor rule in differentiation
Linearity of differentiation
Power rule
Chain rule
Local linearization
Product rule
Quotient rule
Inverse functions and differentiation
Implicit differentiation
Stationary point
Maxima and minima
First derivative test
Second derivative test
Extreme value theorem
Differential equation
Differential operator
Newton's method
Taylor's theorem
L'Hôpital's rule
General Leibniz rule
Mean value theorem
Logarithmic derivative
Differential (calculus)
Related rates
Regiomontanus' angle maximization problem
Rolle's theorem
== Integral calculus ==
Antiderivative/Indefinite integral
Simplest rules
Sum rule in integration
Constant factor rule in integration
Linearity of integration
Arbitrary constant of integration
Cavalieri's quadrature formula
Fundamental theorem of calculus
Integration by parts
Inverse chain rule method
Integration by substitution
Tangent half-angle substitution
Differentiation under the integral sign
Trigonometric substitution
Partial fractions in integration
Quadratic integral
Proof that 22/7 exceeds π
Trapezium rule
Integral of the secant function
Integral of secant cubed
Arclength
Solid of revolution
Shell integration
== Special functions and numbers ==
Natural logarithm
e (mathematical constant)
Exponential function
Hyperbolic angle
Hyperbolic function
Stirling's approximation
Bernoulli numbers
== Numerical formulas ==
See also List of numerical analysis topics
Rectangle method
Trapezoidal rule
Simpson's rule
NewtonCotes formulas
Gaussian quadrature
== Lists and tables ==
Table of common limits
Table of derivatives
Table of integrals
Table of mathematical symbols
List of integrals
List of integrals of rational functions
List of integrals of irrational functions
List of integrals of trigonometric functions
List of integrals of inverse trigonometric functions
List of integrals of hyperbolic functions
List of integrals of exponential functions
List of integrals of logarithmic functions
List of integrals of area functions
== Multivariable ==
Partial derivative
Disk integration
Gabriel's horn
Jacobian matrix
Hessian matrix
Curvature
Green's theorem
Divergence theorem
Stokes' theorem
Vector Calculus
== Series ==
Infinite series
Maclaurin series, Taylor series
Fourier series
EulerMaclaurin formula
== History ==
Adequality
Infinitesimal
Archimedes' use of infinitesimals
Gottfried Leibniz
Isaac Newton
Method of Fluxions
Infinitesimal calculus
Brook Taylor
Colin Maclaurin
Leonhard Euler
Gauss
Joseph Fourier
Law of continuity
History of calculus
Generality of algebra
== Nonstandard calculus ==
Elementary Calculus: An Infinitesimal Approach
Nonstandard calculus
Infinitesimal
Archimedes' use of infinitesimals
For further developments: see list of real analysis topics, list of complex analysis topics, list of multivariable calculus topics.

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In mathematics, a chaotic map is a map (an evolution function) that exhibits some sort of chaotic behavior. Maps may be parameterized by a discrete-time or a continuous-time parameter. Discrete maps usually take the form of iterated functions. Chaotic maps often occur in the study of dynamical systems.
Chaotic maps and iterated functions often generate fractals. Some fractals are studied as objects themselves, as sets rather than in terms of the maps that generate them. This is often because there are several different iterative procedures that generate the same fractal. See also Universality (dynamical systems).
== List of chaotic maps ==
== List of fractals ==
Cantor set
de Rham curve
Gravity set, or Mitchell-Green gravity set
Julia set - derived from complex quadratic map
Koch snowflake - special case of de Rham curve
Lyapunov fractal
Mandelbrot set - derived from complex quadratic map
Menger sponge
Newton fractal
Nova fractal - derived from Newton fractal
Quaternionic fractal - three dimensional complex quadratic map
Sierpinski carpet
Sierpinski triangle
== References ==

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This is a list of named algebraic surfaces, compact complex surfaces, and families thereof, sorted according to their Kodaira dimension following EnriquesKodaira classification.
== Kodaira dimension −∞ ==
=== Rational surfaces ===
Projective plane
==== Quadric surfaces ====
Cone (geometry)
Cylinder
Ellipsoid
Hyperboloid
Paraboloid
Sphere
Spheroid
==== Rational cubic surfaces ====
Cayley nodal cubic surface, a certain cubic surface with 4 nodes
Cayley's ruled cubic surface
Clebsch surface or Klein icosahedral surface
Fermat cubic
Monkey saddle
Parabolic conoid
Plücker's conoid
Whitney umbrella
==== Rational quartic surfaces ====
Châtelet surfaces
Dupin cyclides, inversions of a cylinder, torus, or double cone in a sphere
Gabriel's horn
Right circular conoid
Roman surface or Steiner surface, a realization of the real projective plane in real affine space
Tori, surfaces of revolution generated by a circle about a coplanar axis
==== Other rational surfaces in space ====
Boy's surface, a sextic realization of the real projective plane in real affine space
Enneper surface, a nonic minimal surface
Henneberg surface, a minimal surface of degree 15
Bour's minimal surface, a surface of degree 16
Richmond surfaces, a family of minimal surfaces of variable degree
==== Other families of rational surfaces ====
Coble surfaces
Del Pezzo surfaces, surfaces with an ample anticanonical divisor
Hirzebruch surfaces, rational ruled surfaces
Segre surfaces, intersections of two quadrics in projective 4-space
Unirational surfaces of characteristic 0
Veronese surface, the Veronese embedding of the projective plane into projective 5-space
White surfaces, the blow-up of the projective plane at
n
+
1
C
2
{\displaystyle _{n+1}C_{2}}
points by the linear system of degree-
n
{\displaystyle n}
curves through those points
Bordiga surfaces, the White surfaces determined by families of quartic curves
=== Non-rational ruled surfaces ===
=== Class VII surfaces ===
Vanishing second Betti number:
Hopf surfaces
Inoue surfaces; several other families discovered by Inoue have also been called "Inoue surfaces"
Positive second Betti number:
Enoki surfaces
InoueHirzebruch surfaces
Kato surfaces
== Kodaira dimension 0 ==
=== K3 surfaces ===
Kummer surfaces
Tetrahedroids, special Kummer surfaces
Wave surface, a special tetrahedroid
Plücker surfaces, birational to Kummer surfaces
Weddle surfaces, birational to Kummer surfaces
Smooth quartic surfaces
Supersingular K3 surfaces
=== Enriques surfaces ===
Reye congruences, the locus of lines that lie on at least two quadrics in a general three dimensional linear system of quadric surfaces in projective 3-space
P
3
{\displaystyle \mathbb {P} ^{3}}
.
The quotient of a K3 surface under a fixpointfree involution.
=== Abelian surfaces ===
HorrocksMumford surfaces, surfaces of degree 10 in projective 4-space that are the zero locus of sections of the rank-two HorrocksMumford bundle
=== Other classes of dimension-0 surfaces ===
Non-classical Enriques surfaces, a variation on the notion of Enriques surfaces that only exist in characteristic two
Hyperelliptic surfaces or bielliptic surfaces; quasi-hyperelliptic surfaces are a variation of this notion that exist only in characteristics two and three
Kodaira surfaces
== Kodaira dimension 1 ==
Dolgachev surfaces
== Kodaira dimension 2 (surfaces of general type) ==
Barlow surfaces
Beauville surfaces
Burniat surfaces
Campedelli surfaces; surfaces of general type with the same Hodge numbers as Campedelli surfaces are called numerical Campidelli surfaces
Castelnuovo surfaces
Catanese surfaces
Fake projective planes or Mumford surfaces, surfaces with the same Betti numbers as projective plane but not isomorphic to it
Fano surface of lines on a non-singular 3-fold; sometimes, this term is taken to mean del Pezzo surface
Godeaux surfaces; surfaces of general type with the same Hodge numbers as Godeaux surfaces are called numerical Godeaux surfaces
Horikawa surfaces
Todorov surfaces
== Families of surfaces with members in multiple classes ==
Surfaces that are also Shimura varieties:
Hilbert modular surfaces
Humbert surfaces
Picard modular surfaces
Shioda modular surfaces
Elliptic surfaces, surfaces with an elliptic fibration; quasielliptic surfaces constitute a modification this idea that occurs in finite characteristic
Raynaud surfaces and generalized Raynaud surfaces, certain quasielliptic counterexamples to the conclusions of the Kodaira vanishing theorem
Exceptional surfaces, surfaces whose Picard number achieve the bound set by the central Hodge number h1,1
Kähler surfaces, complex surfaces with a Kähler metric; equivalently, surfaces for which the first Betti number b1 is even
Minimal surfaces, surfaces that can't be obtained from another by blowing up at a point; they have no connection with the minimal surfaces of differential geometry
Nodal surfaces, surfaces whose only singularities are nodes
Cayley's nodal cubic, which has 4 nodes
Kummer surfaces, quartic surfaces with 16 nodes
Togliatti surface, a certain quintic with 31 nodes
Barth surfaces, referring to a certain sextic with 65 nodes and decic with 345 nodes
Labs surface, a certain septic with 99 nodes
Endrass surface, a certain surface of degree 8 with 168 nodes
Sarti surface, a certain surface of degree 12 with 600 nodes
Quotient surfaces, surfaces that are constructed as the orbit space of some other surface by the action of a finite group; examples include Kummer, Godeaux, Hopf, and Inoue surfaces
Zariski surfaces, surfaces in finite characteristic that admit a purely inseparable dominant rational map from the projective plane
== See also ==
EnriquesKodaira classification
List of surfaces
== References ==
Compact Complex Surfaces by Wolf P. Barth, Klaus Hulek, Chris A.M. Peters, Antonius Van de Ven ISBN 3-540-00832-2
Complex algebraic surfaces by Arnaud Beauville, ISBN 0-521-28815-0
== External links ==
Mathworld has a long list of algebraic surfaces with pictures.
Some more pictures of algebraic surfaces, especially ones with many nodes.
Pictures of algebraic surfaces by Herwig Hauser.
Free program SURFER to visualize algebraic surfaces in real-time, including a user gallery.

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title: "List of language reforms of English"
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For centuries, many people have called for language reforms of English, which vary in approach from the radical (completely overhauling existing conventions) to the conservative (preserving most while removing irregularities).
Phonetic alphabets limited to English do not belong here. See Category:Phonetic alphabets.
== Spelling reforms ==
Spelling reforms are attempts to regularize English spelling either by reducing the number of irregularities or by making it completely phonemic. This may be done using the existing basic English alphabet more uniformly (basic), by adding diacritics (diacriticized), by adding new letters (extended), by removing letters in the script or writing (squeezed), by removing letters and replacing it by new ones (altered) or by replacing it entirely (replaced). Such proposals include:
== Subsets ==
Subsets are reforms that use a restricted wordlist and grammar. English subsets include:
Attempto Controlled English
Aviation English
Basic English
ClearTalk
Common Logic Controlled English
E-Prime
Gellish Formal English
Globish
Learning English
Logical English
ModeLang
Newspeak (fictional)
Plain English
Processable English (PENG)
Seaspeak
SBVR Structured English
Simplified Technical English
Specialized English
== Vocabulary reforms ==
Vocabulary reforms seek to reform English by changing or restricting its words without changing its grammar.
Anglish: the use of native (Germanic) words only, and spellings of such without foreign influence—a form of linguistic purism
== References ==
== External links ==
Language Romanisation and Re-Romanisation

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Self-study language acquisition programs allow learning without having a teacher present, and the courses can supplement or replace classroom instruction. Universities use self-study programs for less-commonly taught languages, where having professors is not feasible. Self-study programs are available on paper, audio files, video files, smartphone apps, computers, or any combination.
This list is limited to programs that teach four or more languages. There are many others that teach one language.
Alphabetical lists of languages show the courses available to learn each language, at All Language Resources, Lang1234, Martindale's Language Center, Omniglot, and Rüdiger Köppe. (UCLA Language Materials Project has ended.) For the thousands of languages not listed on those sites, for which no course exists, Global Recordings Network has recorded a standard set of Bible stories in 6,000 languages. With effort, learners can study any language by comparing their recordings to the same story in a language they know.
The list of self-study programs, below, shows the number of languages taught by each program, the name of the program, and the number of different languages used for instruction. Multiple languages of instruction may be available for some but not all courses. For example, Reise Know-How uses six languages to teach German, but only German to teach the other languages. On the other hand Eurotalk, Pronunciator and 50Languages use all languages to teach all the other languages.
== List ==
== See also ==
Computer-assisted language learning
Language learning video games
Language MOOC
List of flashcard software
Virtual world language learning
== References ==

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A linguist in the academic sense is a person who studies natural language (an academic discipline known as linguistics). Ambiguously, the word is sometimes also used to refer to a polyglot (one who knows several languages), a translator/interpreter (especially in the military), or a grammarian (a scholar of grammar), but these uses of the word are distinct (and one does not have to be multilingual in order to be an academic linguist). The following is a list of notable academic linguists.
In the list, the description is presented as:
surname, given name (country, year of birthyear of death), main achievement
== A ==
Abbott, Barbara (United States, 1943), pragmatics, semantics
Abel, Carl (Germany, 18371906), comparative lexicography
Abdul Haq, Maulvi (India, 18701961), Urdu language
Abrams, Lise (United States), psycholinguistics
Abramson, Arthur S. (United States, 19252017), phonetics
Adamou, Evangelia (France), language contact
Adams, Douglas Q. (United States), English language, comparative linguistics, Tocharian language
Adler, George J. (Germany/United States, 18211868), lexicography, German language, English language
Aijmer, Karin (Sweden, 1939), pragmatics, semantics
Aikhenvald, Alexandra Yurievna (Russia, 1957), syntax, typology, Amazonian languages, Papuan languages, Hebrew language, Russian language
Aitken, Adam Jack (UK, 19211998), lexicography
Ajduković, Jovan (Serbia, 1968), Slavic languages, sociolinguistics, contact linguistics, Russian language, Serbian language
Albright, William Foxwell (United States, 18911971), Semitic languages
Alexiadou, Artemis (1969), Greek language, syntax
Al-Khalil ibn Ahmad al-Farahidi (Oman, 718786 CE), Arabic prosody
Al-Kisa'i (Iraq, d. 804), Arabic grammar
Allan, Keith (Australia, 1943), semantics
Allen, Shanley (1964), psycholinguistics, Inuktitut
Alleyne, Mervyn Coleridge (Trinidad and Tobago/Jamaica, 19332016), creole language
Ameka, Felix (Ghana, Australia, Netherlands, 1957), pragmatics, semantics
Amerias (Greece, 3rd century BC), Ancient Macedonian language, lexicography
Anagnostopoulou, Elena (1967), Greek language, theoretical linguistics
Anderson, Gregory D.S. (United States), Munda languages
Anderson, Stephen (United States, 1943), morphology and history of linguistics
Aoun, Joseph (Lebanon/United States, 1953), Arabic language, syntax
Aquilina, Joseph (Malta, 19111997), Maltese language
Ariel, Mira (Israel), Accessibility Theory, pragmatics
Arisaka Hideyo (Japan, 19081952), Japanese language
Aristar, Anthony (South Africa/United States, 1948), linguistic infrastructure
Armstrong, Lilias (UK, 18821937), phonetics
Aronoff, Mark (Canada, 1949), morphology
Ascoli, Graziadio Isaia (Italy, 18291907), substrata, Ladin language
Austin, John Langshaw (UK, 19111960), philosophy of language, speech act
Awobuluyi, Oladele (Nigeria, 1937), African languages
Ayres-Bennett, Wendy (UK), history of French and history of linguistic thought
Azad, Humayun (Bangladesh, 19472004), Bengali language
Al-Harbi, Abdul Aziz (Saudi Arabia, 1965)
Al-Mubarrad (Basra, c. 826c. 898)
== B ==
Babiniotis, Georgios (Greece, 1939), Greek language
Babych, Nadiya (Ukraine, 19432021), phraseology
Bach, Emmon (United States, 19292014), syntax, phonology, Haisla language
Baker, Mark (United States, 1959), Mohawk language, generative grammar
Bally, Charles (Switzerland, 18651947), French language, phraseology
Barbara, Leila (Brazil, 19382024), systemic functional linguistics
Bardovi-Harlig, Kathleen (United States, 1954), second-language acquisition, tense and aspect, pragmatics
Bar-Hillel, Yehoshua (Israel, 19151975), machine translation, categorial grammar
Barker, (Philip) Muhammad Abd-al-Rahman (United States, 19302012), Urdu language, Indian languages
Barlow, Robert Hayward (United States, 19181951), Nahuatl language
Barnhart, David K. (United States, 1941), lexicography, English language
Barnhart, Robert (United States, 19332007), lexicography, English language
Barsky, Robert (Canada), discourse analysis
Barthes, Roland (France, 19151980)
Bartlett, John Russell (United States, 18051886)
Basbøll, Hans (Denmark, 1943), phonology, Danish
Baudouin de Courtenay, Jan Niecisław (Poland, 18451929), phonology, Polish language
Bauer, Robert Stuart (United States, 1946), syntax, phonology, Sino-Tibetan languages (especially Cantonese)
Baugh, John (United States, 1949), sociolinguistics, linguistic profiling, forensic linguistics
Beckman, Mary E. (United States, 1953), phonetics, phonology
Beckwith, Christopher (United States, 1945), Asian languages, Tibetan language
Beddor, Patrice (United States), Phonetics, speech perception
Bedirxan, Celadet Alî (Syria, 18931951) Kurdish language
Beeken, Jeannine (Belgium, 1961), lexicography, syntax, Dutch language
Beekes, Robert S. P. (Netherlands, 19372017), historical linguistics, Indo-European linguistics, Greek linguistics
Bello, Andrés (Venezuela, 17811865), Spanish language, philology
Bellugi, Ursula (United States, 19312022), sign language, neurolinguistics
Ben-Yehuda, Eliezer (Israel, 18581922), lexicography, Revival of the Hebrew language
Bender, M. Lionel (United States, 19342008), African languages
Benedict, Paul K. (United States, 19121977), Sino-Tibetan languages, TaiKadai languages, historical linguistics
Benveniste, Émile (France, 19021976)
Berez-Kroeker, Andrea L. (United States, 1972), language documentation
Berlitz, Charles Frambach (United States, 19142003), language acquisition
Berlitz, Maximilian Delphinius (United States, 18521921), language acquisition
Bhartrihari (India, 450510), Sanskrit
Bickel, Balthasar (Switzerland, 1965), language typology, Kiranti languages
Bickerton, Derek (United States, 19262018), creole languages, origin of language
Bleek, Wilhelm Heinrich Immanuel (Germany, 18271875), languages of Africa
Bloch, Bernard (United States, 19071965), Japanese language
Bloch, Jules (France, 18801953), languages of India
Bloomfield, Leonard (United States, 18871949), structural linguistics
Blust, Robert (United States, 19402022), Austronesian languages
Boas, Franz (United States, 18581942), indigenous languages of the Americas
Bœck, Égide de (Belgium, Belgish Congo, 18751944), Bangala language, Lingala
Boersma, Paul (Netherlands, 1959), phonetics
Boiagi, Mihail G. (Habsburg monarchy, 1780uncertain), Aromanian grammar
Bohn, Ocke-Schwen (Germany, 1953), phonetics, second-language acquisition
Bolinger, Dwight Le Merton (United States, 19071992), semantics, Spanish language
Bomhard, Allan R. (United States, 1943), Nostratic languages, historical linguistics
Ester Bonet (Spain, born 1950), sports terminology
Bopp, Franz (Germany, 17911867), Indo-European languages, comparative linguistics
Boullón Agrelo, Ana Isabel (Spain, born 1962), Galician language toponymy, GalicianPortuguese philology
Bowerman, Melissa (19422011), psycholinguistics, language acquisition
Bowern, Claire, historical linguistics
Boyd, Julian Charles (United States, 19312005), English language
Bresnan, Joan (United States, 1945), syntax
Bright, William (United States, 19282006), Native American languages, South Asian languages
Brinton, Laurel J. (Canada, 1953), grammaticalization, discourse markers
Brody, Michael (Hungary, 1954), syntax
Broselow, Ellen (United States, 1949), second language acquisition, phonology
Browman, Catherine (United States, 19452008), phonetics, phonology
Brugmann, Karl (Germany, 18491919), Indo-European languages, Sanskrit, comparative linguistics
Bucholtz, Mary (United States, 1966), sociolinguistics
Burgess, Anthony (UK, 19171993), English language, phonetics
Burling, Robbins (United States, 19262021), languages of India
Burridge, Kate (Australia), Germanic languages
Butt, Miriam (Germany, 1966), syntax, South Asian languages
Butzkamm, Wolfgang (Germany, 1938), applied linguistics, English language
Byington, Cyrus (United States, 17931868), translated English religious text into Choctaw language
Badawi, El-Said (Egypt, 19292014), Arabic

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== C ==
Caland, Willem (Netherlands, 18591932), historical linguistics, Sanskrit
Campbell, Lyle (United States, 1942), Native American languages, historical linguistics
Canger, Una (Denmark, 1938), Mesoamerican languages
Canonge, Elliott D. (United States, 19211971), Comanche, Inuit
Capell, Arthur (Australia, 19021986), Australian languages, Austronesian languages, Papuan languages
Cardona, George (United States, 1936), Indo-European studies
Carnap, Rudolf (Germany, 18911970), syntax, constructed languages
Carnie, Andrew (Canada, 1969), syntax
Caro Baroja, Julio (19141995), Basque language
Caro, Miguel A. (Colombia, 18431909), Spanish language, Colombian Spanish
Carpenter, William Henry (United States, 18531936), Icelandic language
Cart, Théophile (France, 18551931), Esperanto
Carter, Hazel (UK, 19282016), Bantu languages
Catford, J. C. (UK, 19172009), phonetics
Chadwick, John (UK, 19201998), Linear B
Chafik, Mohamed (Morocco, 1926), writer and specialist in the Berber or Amazigh languages, dialects, and literature
Chafe, Wallace (United States, 19272019), cognitive linguistics, semantics
Chao Yuen Ren (China, 18921982), Chinese language
Chakrabarti, Byomkes (India, 19231981), Santali language, Bengali language, comparative linguistics
Champollion, Jean-François (France, 17901832), Egyptian hieroglyphs
Chambers, Jack (Canada, 1938), sociolinguistics
Chatterji, Suniti Kumar (India, 18901977), Bengali language
Chelliah, Shobhana, Tibeto-Burman languages
Chierchia, Gennaro (Italy, 1953), semantics, pragmatics
Choijinzhab (PR China, 19312022), Mongolian language
Chomsky, Noam (United States, 1928), syntax, universal grammar
Choueiri, Lina (Lebanon), syntax, Lebanese Arabic
Chyet, Michael L. (United States, 1957), Kurdish language
Clark, Eve V. (UK/United States, 1942), psycholinguistics, language acquisition
Clyne, Michael George (Australia, 19392010), Germanic languages
Cohen, Paul S. (United States), 1942), phonology, etymology
Cohen, Maurice Abraham (Australia), 18511923), Urdu
Collitz, Hermann (Germany/United States, 18551935), historical linguistics
Comrie, Bernard (UK, 1947), typology
Cook, Guy (UK, 1951), applied linguistics
Cook, Vivian (UK, 19402021), applied linguistics
Corder, Stephen Pit (UK, 19181990), applied linguistics
Coşeriu, Eugen (Romania/Germany, 19212002), Romance languages
Couper-Kuhlen, Elizabeth (1943), interactional linguistics
Cowgill, Warren (United States, 19291985), Indo-European studies
Cowper, Elizabeth (Canada, 1952), syntax
Creissels, Denis (France, 1943), syntax, phonology, NigerCongo languages, Nakh-Daghestanian languages
Croft, William (United States, 1956), syntax, cognitive linguistics
Crystal, David (UK, 1941), English language, language death, applied linguistics
Cuervo, Rufino José (Colombia, 18441911), Spanish language, Colombian Spanish
Culicover, Peter W. (United States), syntax, language change
Culioli, Antoine (France, 19242018), general linguistics
Cumakunova, Gülzura (Kyrgyzstan, 1954), Turkic languages
Curme, George Oliver, Sr. (United States, 18601948), German language, English language
Curzan, Anne (United States), English language, Descriptivism, Prescriptivism, lexicography
Calvet, Louis-Jean (France, 1942-), Sociolinguistique
== D ==
Dal, Vladimir (Russia, 18011872), lexicography, Russian language
Dahl, Östen (Sweden, 1945), tense and aspect in linguistic typology
Darzi, Ali (Iran, 1959), generative syntax, minimalist program
Das, Khudiram (India, 19162002), Bengali and Santali language
Dani, Ahmad Hasan (Pakistan, 19202009), South Asian languages
Daniels, Peter T. (United States, 1951), writing systems
Davies, Shaun (Australia), Yugambeh language
Dayal, Veneeta (United States, 1956), semantics, syntax
Deacon, Terrence (United States, 1950), language change, origin of language, cognitive linguistics
Dehkhoda, Ali-Akbar (Iran, 18791959), lexicography, Persian language
De Houwer, Annick (Belgium, 1958), early child bilingualism
Delbrück, Berthold (Germany, 18421922), Indo-European languages, syntax, comparative linguistics
DeLancey, Scott (United States, 1949), Tibeto-Burman languages, linguistic typology, historical linguistics
Dempwolff, Otto (Germany, 18711938), Austronesian languages
Diderichsen, Paul (Denmark, 19051964), Danish
Diffloth, Gérard (United States, 19392023), MonKhmer languages
van Dijk, Teun Adrianus (Netherlands, 1943), pragmatics, discourse analysis, text linguistics
Dik, Simon (the Netherlands, 19401995) Functional Grammar, theoretical linguistics
Dixon, Robert Malcolm Ward (Australia, 1939), syntax, typology, Australian languages, Amazonian languages
Dobrovský, Josef (Czech Republic, 17531829), Slavic languages, Czech language, lexicography
Dobson, Veronica Perrule (Australia, 1944), Arrernte language
Doke, Clement Martyn (South Africa, 18931980), Bantu languages, Lamba language
Dolgopolsky, Aharon (Russia/Israel, 19302012), Nostratic languages
Dorian, Nancy (United States, 19362024), language death, Scottish Gaelic
Dougherty, Ray C. (United States, 1940), transformational grammar, computational linguistics
Dowty, David (United States, 1945), semantics, syntax
Dozier, Edward P. (United States, 19161971), Native American languages, languages of the Philippines
Dressler, Wolfgang U. (Austria, 1939), phonology, morphology, text linguistics
van Driem, George (Netherlands, 1957), Tibeto-Burman languages, symbiosism, Dzongkha language
Dryer, Matthew (United States), typology, syntax, language documentation
Duden, Konrad (Germany, 18291911), lexicography, German language
Dunn, John Asher (United States,19392017), Tsimshian language
Dušková, Libuše (Czech Republic, 1930), English language, functional linguistics
== E ==
Eckert, Penelope (United States, 1942), sociolinguistics, language and gender
Edmondson, Jerold A. (United States, 19412023), TaiKadai languages, languages of Southeast Asia
Edwards, Jonathan, Jr. (United States, 17451801), North American languages, historical linguistics, Mohegan language
Ehret, Christopher (United States, 19412025), languages of Africa, historical linguistics
Elbert, Samuel Hoyt (United States, 19071997), Polynesian languages of Hawaiʻi and Rennell and Bellona, Puluwatese language
Elgin, Suzette Haden (United States, 19362015), constructed languages, transformational grammar
Ellis, Rod (UK), second-language acquisition
Elman, Jeffrey L. (United States, 19482018), language processing, neurolinguistics
Emeneau, Murray Barnson (United States, 19042005), Dravidian languages, linguist areas
Emre, Ahmet Cevat (Turkey, 18761961), Member of the Turkish Language Association, Turkish alphabet
Engberg-Pedersen, Elisabeth (Denmark, 1952), semantics, Danish Sign Language
Epps, Patience L., Amazonian languages, language documentation
Erdal, Marcel (Turkey, 1945), Turkic languages
Esenç, Tevfik (Turkey, 19041992), Ubykh language
Esling, John (Canada, 1939), phonetics
Estrella Santos, Ana (Ecuador, born 20th-c.), dialectology
Evans, Nicholas (Australia, 1956), Indigenous Australian languages, Papuan languages, typology
Evans, Vyvyan (UK, 1968), cognitive linguistics, digital communication, and emoji
Even-Shoshan, Avraham (Belarus/Israel, 19061984), Hebrew language, lexicography
Everett, Daniel Leonard (United States, 1951), languages of Brazil, Pirahã language
Everson, Michael (United States/Ireland, 1963), writing systems, historical linguistics

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== F ==
Fairuzabadi (Iran, 13291414), lexicography, Arabic grammar
Farhady, Hossein (Iran, born 1947), Iranian applied linguist
Fassi Fehri, Abdelkader (Morocco, 1947), Arabic syntax
Fierz-David, Linda (Germany, 18911955), philology
Fillmore, Charles J. (United States, 19292014), syntax, lexical semantics, cognitive linguistics, lexicography
Firbas, Jan (Czech Republic, 19212000), English language, functional linguistics
Firth, John Rupert (UK, 18901960), phonetics, phonology, prosody
Fischer-Jørgensen, Eli (Denmark 19112010), phonetics, phonology, Danish language
Fishman, Joshua (United States, 19262015), sociology of language
Fiske, Willard (United States, 18311904), Northern European languages, Icelandic language
Fodor, Janet Dean (United States, 19422023), psycholinguistics, semantics, syntax
Fodor, Jerry Alan (United States, 19352017), psycholinguistics, language of thought
Foley, William A. (Australia, 1949), Papuan languages, Austronesian languages
Ford, Jeremiah Denis Mathias (United States, 18731958), Spanish language
Fowler, Carol A. (United States), phonetics, phonology
François, Alexandre (France), Austronesian languages, historical linguistics, language contact
Freiman, Aleksandr Arnoldovich (Poland/Russia, 18791968), Iranian languages
French, David Heath (United States, 19181994), Native American languages
Friedrich, Johannes (Germany, 18931972), Hittite language
Fromkin, Victoria (United States, 19232000), theoretical linguistics, constructed languages
Fujitani Nariakira (Japan, 17381779), Japanese language
== G ==
Galloway, Brent D. (United States, 19442014), Amerindian languages, Halkomelem language
Gamkrelidze, Thomas V. (Georgia, 19292021), Indo-European studies, Georgian language
Gans, Eric (United States, 1941), origin of language
Garnier, Romain (France, 1976), Indo-European linguistics
Gazdar, Gerald (UK, 1950), computational linguistics, syntax, semantics
Gebauer, Jan (Czech Republic, 18381907), Czech language
Geeraerts, Dirk (Belgium, 1955), semantics, lexicography
van Geert, Paul (Netherlands, 1950), second language development
Giles, Howard (Wales/United States, 1946), sociolinguistics
Givón, Talmy (Israel/United States, 1936), syntax, semantics, pragmatics, typology, functionalism
Giegerich, Heinz (Germany/UK, 1952), English language, phonology
Gleason, Jean Berko (United States, 1931), psycholinguistics, language acquisition
Goatly, Andrew (UK), English language, Chinese language
Goddard, Cliff (Australia, 1953), semantics, pragmatics
Goddard, R.H. Ives, III (United States, 19412025), Algonquian languages, historical linguistics
Gode, Alexander (Germany/United States, 19061970), constructed languages, Germanic languages
Goldberg, Adele (United States, 1963), syntax, psycholinguistics
Goldsmith, John Anton (United States, 1951), phonology, computational linguistics
Goldstein, Louis M. (United States), phonetics, phonology
Gong Hwang-cherng (Republic of China, 19342010), Sino-Tibetan languages, Old Chinese, Tangut language
Gordon, Cyrus Herzl (United States, 19082001), ancient languages, cuneiform script
Gramsci, Antonio (Italy, 18911937), Italian language
Gray, Louis Herbert (United States, 18751955), Indo-Iranian languages, phonology
Green, Lisa (United States), syntax of African American English
Greenberg, Joseph Harold (United States, 19152001), typology, language universals, languages of Africa
Grenoble, Lenore (United States, 1958), language contact, language endangerment, deixis, Slavic and Arctic Indigenous languages
Grice, (Herbert) Paul (UK/United States, 19131988), pragmatics
Grierson, George Abraham (Ireland, 18511941), languages of India
Gries, Stefan Th. (Germany/United States, 1970), corpus linguistics, computational linguistics, cognitive linguistics, construction grammar
Grimm, Jakob Ludwig Carl (Germany, 17851863), historical linguistics, comparative linguistics, German language
Grinder, John Thomas (United States, 1940), neurolinguistics
Gross, Maurice (France, 19342001), lexicon-grammar
Grosz, Barbara J. (United States, 1948 ), natural language processing, computational modeling of discourse
Groupe μ (Belgium, 1967), rhetorics, semiotics
Grube, Wilhelm (Germany, 18551908), Tungusic languages, Nivkh language, Jurchen language
Grønnum, Nina (Denmark, 1945), intonation of Danish
Gumperz, John Joseph (United States, 19222013), sociolinguistics, discourse analysis, linguistic anthropology
Gutiérrez Eskildsen, Rosario María (Mexico, 18991979), Spanish language, dialectology
Guy, Gregory (United States, 1950), sociolinguistics, historical linguistics, phonetics, phonology
Guthrie, Malcolm (Britain, 19031972), Bantu languages
Gygax, Pascal (Swiss, 1974), inclusive language in French

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== H ==
Haarmann, Harald (Germany, 1946), evolutionary linguistics, language contact
Haas, Mary Rosamund (United States, 19101996), Native American languages, Thai language, historical linguistics
Haase, Martin (Germany, 1962), Romance languages
Hagberg, Carl August (Sweden, 18101864), Scandinavian languages
Hajič, Jan (Czech Republic), computational linguistics
Hajičová, Eva (Czech Republic, 1935), corpus linguistics
Hale, Kenneth Locke (United States, 19342001), syntax, phonology
Hall, Kira (United States, 1962), sociocultural linguistics
Hall, Robert A., Jr. (United States, 19111997), Romance languages, Pidgins and Creoles
Halle, Morris (Latvia/United States, 19232018), phonology, morphology
Halliday, Michael Alexander Kirkwood (UK/Australia, 19252018), systemic functional grammar, ecolinguistics, applied linguistics
Hammarström, Harald (Sweden, 1977), computational linguistics, historical linguistics, linguistic typology
Hammond, Michael (United States, 1957), phonology, computational linguistics, syntax
Hamp, Eric P. (United States, 19202019), Indo-European languages, Native American languages
Hanzeli, Victor (United States, 19251991), Romance languages
Haq, Mehr Abdul (Pakistan, 19151995), Saraiki language
Harder, Peter (Denmark, 1950), English language, functional linguistics
Harkavy, Alexander (Belarus/United States, 18631939), Yiddish language, lexicography
Harley, Heidi B. (United States, 1969), distributed morphology, syntax
Harrington, John Peabody (United States, 18841961), Native American languages, phonetics
Alice C. Harris (United States, 1947-), Kartvelian languages, historical linguistics
Harris, Roy (UK, 19312015), semiology, integrationism
Harris, Zellig Sabbetai (Ukraine/United States, 19091992), structural linguistics, discourse analysis, Semitic languages
Harrison, K. David (United States, 1966), phonology, endangered languages, language extinction
Hartmann, Reinhard Rudolf Karl (Austria/UK, 19382024), lexicography, contrastive linguistics
Hasan, Ruqaiya (India/Australia, 19312015), systemic functional grammar, sociolinguistics, applied linguistics
Hashimoto Mantarō (Japan, 19321987), Japanese language
Hashimoto Shinkichi (Japan, 18821945), Old Japanese language, Japanese language
Haspelmath, Martin (Germany, 1963), typology, language change, language contact, Lezgian language
Haugen, Einar Ingvald (United States, 1906 1994), sociolinguistics, Old Norse
Hawkins, John A. (UK), psycholinguistics, historical linguistics
Hayakawa, Samuel Ichiye (Canada/United States, 19061992), semantics
Hayes, Bruce (United States, 1955), phonology
Hays, David Glenn (United States, 19281995), computational linguistics, machine translation, dependency grammar, corpus linguistics, natural language processing, cognitive science
Heath, Jeffrey (United States, 1949), historical linguistics, morphology, linguistic anthropology
Heim, Irene Roswitha (Germany/United States, 1954), semantics
Heine, Bernd (Germany, 1939), languages of Africa, sociolinguistics, language contact
Hepburn, James Curtis (United States, 18151911), Japanese language, lexicography
Herbert, Robert Knox (United States, 19522007), phonology, languages of Africa, sociolinguistics
Hetzron, Robert (Hungary/United States, 19371997), Afro-Asiatic languages
Hewitt, John Napoleon Brinton (United States, 18591937), Iroquoian languages
Hjelmslev, Louis (Denmark, 18991965), comparative linguistics, semantics
Hobbs, Jerry R. (United States, 1942), computational linguistics, discourse analysis, syntax, semantics
Hock, Hans Henrich (Germany/United States, 1938), historical linguistics, comparative linguistics, Sanskrit
Hockett, Charles Francis (United States, 19162000), phonology, morphology
Hoey, Michael (UK, 19482021), lexical priming, textual interaction, corpus linguistics
Hoff, Erika (United States, 1951—), Psycholinguistics
Hoffmann, John-Baptist (Germany, 18571928), Mundari language
Hogg, Richard M. (UK, 19442007), phonology, historical linguistics
Hoijer, Harry (United States, 19041976), Athabaskan languages, Tonkawa language
Hopper, Paul (UK/United States), historical linguistics, emergent grammar
Hornstein, Norbert (United States), syntax
Hryhorchuk, Lidiia (Ukraine, 19262018), Ukrainian language
Hrozný, Bedřich (Czech Republic, 18791952), Hittite language, ancient languages
Huddleston, Rodney D. (UK/Australia, 1937—), English language
Hudson, Richard (UK, 1939), syntax, word grammar, linguistics in education
von Humboldt, Wilhelm (Germany, 17871835), Basque language
Hunston, Susan (UK, 1953), corpus linguistics, lexical semantics
Hupel, August Wilhelm (Germany/Estonia, 17371819), Estonian language, lexicography
Hurford, James R. (UK, United States, 1941), phonetics, semantics, grammar, computational linguistics, evolutionary linguistics
Husain Khan, Masud (India, 19192010), Urdu language, phonetics, stylistics, linguistic description
Hyman, Larry M. (United States, 1947), phonology, languages of Africa
Hymes, Dell Hathaway (United States, 19272009), sociolinguistics, Kathlamet language
== I ==
Ibn Sidah (Andalusia, c.10071066)
Ibn Manzur (c.12331311/1312)
Ibn Jinni (c.9321002)
Illich-Svitych, Vladislav Markovich (Ukraine/Russia, 19341966), comparative linguistics, Nostratic languages
Ivanov, Aleksei Ivanovich (Russia, 18781937), Chinese language, Tangut language
Ivanov, Vyacheslav Vsevolodovich (Russia, 19292017), Indo-European studies
Ivić, Pavle (Serbia, 19241999), South Slavic languages, phonology, Serbo-Croatian language
== J ==
Jackendoff, Ray (United States, 1945), syntax, lexical semantics
Jackson, Abraham Valentine Williams (United States, 1862—1937), Indo-Iranian languages, Avestan language
Jackson, Kenneth Hurlstone (UK, 1909—1991), Brythonic languages, Gaelic languages
Jacobsen, Lis (18821961), Danish and Nordic languages
Jacques, Guillaume (France, 1979—), Old Chinese, Rgyalrongic languages, Tangut language
Jagić, Vatroslav (Croatia, 1838—1923), Croatian language, Slavic languages
Jakobson, Roman Osipovich (Russia/Czech Republic/United States, 1896—1982), structuralism, phonology
Jarring, Gunnar (Sweden, 1907—2002), Turkic languages
Jasanoff, Jay (United States, 1942), Indo-European linguistics
Jaszczolt, Katarzyna (UK, 1963—), semantics, pragmatics, philosophy of language
Jaunius, Kazimieras (Lithuania, 1848—1908), Lithuanian language, comparative linguistics
Jendraschek, Gerd (Germany), Basque language, Turkish language, Iatmul language
Jensen, Eva Skafte (Denmark, 1966—), Danish language
Jespersen, Otto (Denmark, 1860—1943), English language, phonetics, constructed languages
Johnson, David E. (United States, 1946), syntax
Jones, Daniel (UK, 1881—1967), phonetics
Jones, Sir William (UK, 1746—1794), Indo-European studies, Sanskrit, comparative linguistics
Joshi, Aravind Krishana (India/United States, 19292017), computational linguistics
Junast (PR China, 19342010), Mongolian language, Monguor language, Eastern Yugur language, Phags-pa script
Jurafsky, Daniel (United States, 1962—), computational linguistics

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category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:04.693680+00:00"
instance: "kb-cron"
---
== K ==
Kaplan, Ronald M. (United States, 1946—), computational linguistics
Karadžić, Vuk Stefanović (Serbia, 1787—1864), Serbian language, lexicography
Kari, James (United States), Native American languages
Kasravi, Ahmad (Iran, 1890—1946), ancient languages, Iranian languages
Katz, Jerrold J. (United States, 1932—2002), semantics, generative grammar
Kaufman, Terrence (United States, 1937—2022), historical linguistics, contact linguistics, Mesoamerican languages
Kay, Martin (UK, United States, 19352021), computational linguistics
Kay, Paul (United States, 1934—), construction grammar
Kayne, Richard S. (United States, 1944—), syntax, transformational grammar
Kazama Kiyozō (Japan, 1928), Japanese language
Keating, Patricia (United States, 1952—), phonetics
Kellogg, Samuel H. (United States, 18391899), Hindi language
Kenyon, John Samuel (United States, 1874—1959), English language, lexicography, phonology
Keyser, Samuel Jay (United States, 1935), phonology, English language
Kiesling, Scott Fabius (United States), sociolinguistics
Kindaichi Haruhiko (Japan, 19132004), Japanese language
Kindaichi Kyōsuke (Japan, 18821971), Ainu language
Kinkade, M. Dale (United States, 1933—2004), Salishan languages
Kiparsky, Paul (Finland/United States, 1941), phonology, morphology
Kirby, Simon (UK), computational linguistics, evolutionary linguistics
Klima, Edward (United States, 1931—2008), sign language
Klinkenberg, Jean-Marie (Belgium, 1944), rhetorics, semiotics, stylistics
Kloekhorst, Alwin (Netherlands, 1978), Anatolian languages
Knechtges, David R. (United States, 1942), East Asian languages, Chinese language
Knorozov, Yuri Valentinovich (Russia, 1922—1999), Maya hieroglyphics, writing systems
Kober, Alice (UK/United States, 1906—1950), Linear B
Komárek, Miroslav (Czechia, 19242013), Czech language, morphology, phonology
Kordić, Snježana (Croatia, 1964), Serbo-Croatian language, syntax, sociolinguistics
Kornai András (Hungary/United States, 1957), mathematical linguistics, phonology, morphology, Hungarian language, syntax
Kornfilt, Jaklin, theoretical linguistics, syntax, morphology, Turkic languages, Germanic languages
Korsakov, Andrey Konstantinovich (Russia/Ukraine, 1916—2007), Germanic languages, English language, morphology, syntax
Kortlandt, Frederik (Netherlands, 1946), historical linguistics, Indo-European linguistics, Balto-Slavic languages
Korzybski, Alfred Habdank Skarbek (Poland/United States, 1879—1950), general semantics
Koster, Jan (Netherlands, 1945), generative grammar
Krahe, Hans (Germany, 1898—1965), Indo-European languages, Illyrian language
Krashen, Stephen (United States, 1941), second-language acquisition
Kratzer, Angelika (United States/Germany), semantics
Krauss, Michael E. (United States, 19412019), Native American languages
Krishnamurti, Bhadriraju (India, 19292012), Dravidian languages
Kroeber, Alfred Louis (United States, 1876—1960), Native American languages
Kučera, Henry (Czech Republic/United States, 19252010), computational linguistics
Kuiper, F. B. J. (Netherlands, 19072003), historical linguistics, Indo-European linguistics, and Sanskrit
Kuno Susumu (Japan/United States, 1933), Dravidian languages, Japanese language, syntax
Kurath, Hans (Austria/United States, 1891—1992), English language, lexicography, dialectology
Kuroda Shigeyuki (Japan, 19342009), Japanese language
Kuryłowicz, Jerzy (Poland, 1895—1978), Indo-European languages, syntax, morphology
Kvergić, Hermann Feodor (Slovakia, 1895sometime after 1948), Turkish language
Kychanov, Evgenij Ivanovich (Russia, 19322013), Tangut language
== L ==
Labov, William (United States, 19272024), sociolinguistics, English dialectology, phonology
Lado, Robert (United States, 19151995), applied linguistics, contrastive analysis
Ladefoged, Peter Nielsen (UK/United States, 19252006), phonetics, endangered languages
Laird, Charlton (United States, 19011984), lexicography, English language
Lakoff, George P. (United States, 1941), cognitive linguistics, transformational grammar, generative semantics, syntax
Lakoff, Robin Tolmach (United States, 19422025), sociolinguistics
Lamb, Sydney MacDonald (United States, 1929), stratificational grammar, Native American languages, historical linguistics, computational linguistics
Lambdin, Thomas Oden (United States, 19272020), Semitic languages, Egyptian language
Lane, Harlan (United States, 19362019), speech, Deaf culture, sign language
Langacker, Ronald W. (United States, 1942), cognitive linguistics
Langdon, Margaret (United States, 19262005), Native American languages
LaPolla, Randy J. (United States), morpho-syntax, Chinese, Qiang, Rawang
Lasersohn, Peter (United States), semantics
Lasnik, Howard (United States, 1945), syntax
Laycock, Donald (Australia, 19361988), languages of Papua New Guinea
Leech, Geoffrey (UK, 19362014), applied linguistics, English language
Lees, Robert (United States, 19221996), machine translation
Lehiste, Ilse (United States, 19222010), phonetics, Estonian language, Serbo-Croatian, phonology
Lehmann, Winfred P. (United States, 1916 2007), historical linguistics, Proto-Indo-European language
Leonard, Robert A. (United States), Forensic linguistics
Lepsius, Karl Richard (Germany, 1810 1884), Egyptian language, Nubian languages, phonology
Leslau, Wolf (Polish-born American, 19062006), Semitic languages, Languages of Ethiopia
Leskien, August (Germany, 18401916), comparative linguistics, Baltic languages, Slavic languages
Levin, Beth (United States, 1955), semantics
Levinson, Stephen C. (UK/Netherlands, 1947), pragmatics
Levstik, Fran (Slovenia, 18311881), Slovene language
Li Fanwen (PR China, 1932), Tangut language
Li, Fang-Kuei (China/United States, 19021987), Mattole language, Tai languages, Old Chinese, Tibetan language
Li, Paul Jen-kuei (Taiwan, 1936), Formosan languages, Austronesian languages, historical linguistics, lexicography
Liberman, Alvin Meyer (United States, 19172000), speech perception, phonology
Liberman, Anatoly (Russia/United States, 1937), etymology, Germanic languages
Liberman, Mark (United States), phonetics, prosody
Lieber, Rochelle (United States, 1954), morphology, syntax, lexical semantics
Lieberman, Philip (United States, 19342022), phonetics, language evolution
Lillo-Martin, Diane (United States), signed languages
Lisker, Leigh (United States, 19182006), phonetics, Dravidian languages
Local, John (UK, 1947), phonetics, phonology, conversation analysis
López Sández, María (Spain, born 1973), Galician philologist and essayist
Lounsbury, Floyd Glenn (United States, 19141998), Native American languages, Mayan languages
Lowman, Guy Sumner, Jr. (United States, 19091941), phonetics
Ludlow, Peter (United States, 1957), syntax, semantics
Lukoff, Fred (United States, 19202000), Korean language, phonology
Lunde, Ken (United States, 1965), East Asian languages
Lynch, John (Australia, 19462021), Austronesian languages, historical linguistics

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category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:04.693680+00:00"
instance: "kb-cron"
---
== M ==
MacWhinney, Brian (United States, 1945), language acquisition, second-language acquisition, corpus linguistics
Maddieson, Ian (United States, 1942), phonetics
Fray Francisco Maldonado (1571 c. 1640), Guatemalan Franciscan linguist and historian
Manzini, Rita (Italy), generative syntax, Romance languages
Malkiel, Yakov (United States, 19141998), etymology, philology
Manaster Ramer, Alexis (United States/Poland, 1956), phonology, syntax, poetics, etymology
Marantz, Alec (United States, 1959), distributed morphology
March, Francis Andrew (United States, 18251911), comparative linguistics, lexicography, Old English language, English language
Margolis, Max Leopold (Lithuania/United States, 18661932), Semitic languages
Marr, Nikolay Yakovlevich (Georgia/Russia, 18651934), historical linguistics, comparative linguistics, origin of language
Martin, James (Sydney, Australia, 1950), genre
Martin, Samuel Elmo (United States, 19242009), Korean language, Japanese language
Martinet, André (France, 19081999), structuralism, historical linguistics, constructed languages
Martinet, Jeanne (France, 19202018), semiotics, constructed languages
Massam, Diane (Canada), syntax, Austronesian languages
Matasović, Ranko (Croatia, 1968), historical linguistics, Celtic languages
Mathesius, Vilém (Czech Republic, 1882 1945), phonology, syntax, English language, Czech language
Matisoff, James A. (United States, 1937), Tibeto-Burman languages, phonology
Matthews, Peter Hugoe (UK, 19342023), morphology, syntax
Matthews, Stephen (UK/PR China), typology, syntax, semantics, Cantonese language
Mattingly, Ignatius G. (United States, 19272004), phonetics, speech synthesis, speech perception
Matveyev, Aleksandr (Russia, 19262010), onomastics, etymology
McArthur, Tom (UK, 19382020), English language, lexicography
McCarthy, John J. (United States, 1953), phonology, morphology, optimality theory
McCawley, James D. (UK/United States, 19381999), syntax, semantics, phonology
McConnell-Ginet, Sally (United States, 1938), language of gender and sexuality
McCulloch, Gretchen (Canada), internet linguistics
McCune, George McAfee (North Korea/United States, 19081988), Korean language
McNamara, Barbara (United States, 1942), Chinese language
McGregor, William B. (Australia, 1952), Australian Aboriginal languages, theoretical linguistics, Shua language
McWhorter, John Hamilton (United States, 1965), creole languages, Saramaccan language
Meillet, Antoine (France, 18661936), Comparative Linguistics, Armenian language, Philology
Meinhof, Carl Friedrich Michael (Germany, 18571944), languages of Africa
Melchert, H. Craig (United States, 1945), Anatolian languages
Merchant, Jason (United States, 1966), syntax, semantics, ellipsis
Michaelis, Laura A. (United States), syntax, English language
Michaud, Alexis (France, 1975), Phonetics, Tonology, Naish languages, Vietnamese
Miklosich, Franz (Slovenia/Austria, 18131891), Slavic languages
Miller, Wick R. (United States, 19321994), Keresan languages, Uto-Aztecan languages
Miller, Roy Andrew (United States, 19242014), Tibetan language, Japanese language
Mithun, Marianne (United States, 1946), Native American languages
Mitxelena Elissalt, Koldo (Spain, 19151987), Basque language
Miura Tsutomu (Japan, 19111989), Japanese language
Miyake, Marc (United States, 1971), historical linguistics, Old Japanese, Tangut language
Mönkh-Amgalan, Yümjiriin (Mongolia, 1956), pragmatics, semantics, syntax, Mongolian language, dialectology
Mori Hiromichi (Japan, 1949), Japanese language
Moskvin, Anatoly (Russia, 1966), academic and linguist, arrested in 2011 after the bodies of 26 mummified young women were discovered in his home
Motoori Norinaga (Japan, 17301801), Japanese language
Motoori Haruniwa (Japan, 17631828), Japanese language
Montague, Richard Merett (United States, 19301971), semantics, philosophy of language
Moro, Andrea (Italy, 1962), syntax, copula, expletive, antisymmetry, neurolinguistics
Moser, Edward W. (United States, 19241976), Seri language
Mufwene, Salikoko (United States), creole languages, African-American English, language evolution
Mulder, Jean (United States, 1954), Australian English, Tsimshianic languages
Munro, Pamela (United States, 1947), Native American languages, lexicography
Murayama Shichirō (Japan, 19081995), Japanese language
Murray, James (UK, 18371915), lexicography, English language, etymology
MutiI, Ibrahim (China, 19202010), Uyghur language
Myers-Scotton, Carol (United States, 1934), language contact
== N ==
Nábělková, Mira (Slovakia, 1956), lexical semantics, sociolinguistics
Nádasdy, Ádám (Hungary, 19472026), phonology, morphophonology
Napoli, Donna Jo (United States, 1948), syntax, phonetics, phonology, Japanese language
Neeleman, Ad (Netherlands/UK, 1964), syntax, semantics, phonology, generative grammar
Nelson, Andrew Nathaniel (United States, 18931975), Japanese language, lexicography
Nevsky, Nikolai Aleksandrovich (Russia, 1892 1937), Tangut language
Newman, Paul (United States, 1937-), African languages
Newmeyer, Frederick J. (United States, 1944), syntax, origin of language
Nichols, Johanna (United States, 1945), languages of the Caucasus, Chechen language, Ingush language, typology
Niftawayh (Iraq, c. 8585935), Arabic grammar, lexicography
Nishida Tatsuo (Japan, 19282012), Tangut language
Nolan, Francis (UK), phonetics
Noreen, Adolf Gotthard (Sweden, 18541925), dialectology, historical linguistics, Germanic languages
Nunberg, Geoffrey (United States, 19452020), lexical semantics, English language
== O ==
Odden, David A. (United States, 1954), phonology, African linguistics, Bantu languages
Odin, Louise (Switzerland, 18361909), Blonay dialect linguist, dialect researcher and author
Ogilvie, Sarah (Australia)
Ohala, John (United States, 19412020), phonetics, phonology
Okrand, Marc (United States, 1948), Klingon language, Mutsun language
Ōno Susumu (Japan, 19192008), Japanese language, Tamil language
Orešnik, Janez (Slovenia, 1935), comparative linguistics
Orikuchi Shinobu (Japan, 18871953), Japanese language
Orton, Harold (UK, 18981975), phonology, dialectology, English dialects
Osthoff, Hermann (Germany, 18471909), Indo-European studies, historical linguistics
Ōtsuki Fumihiko (Japan, 18471928), Japanese language
Özyürek, Aslı, psycholinguistics, neurolinguistics

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category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T08:12:04.693680+00:00"
instance: "kb-cron"
---
== P ==
Pāṇini (India, ca. 520460 BC), Sanskrit, morphology, descriptive linguistics, generative linguistics
Frank R. Palmer (England, 19222019), semantics, English language, Ethiopian languages
Partee, Barbara Hall (United States, 1940), semantics
Paul, Hermann Otto Theodor (Germany, 18461921), lexicography, German language
Pawley, Andrew Kenneth (Australia/New Zealand, 19412026), Austronesian languages, Papuan languages, lexicography, phraseology
Peacock, Dmitri Rudolf (Britain, 18421892), Kartvelian languages
Pedersen, Holger (Denmark, 18671953), Celtic languages, historical linguistics, Nostratic languages
Pedersen, Johannes (Denmark, 18831977), Hebrew language
Pei, Mario Andrew (Italy/United States, 19011978), Italian language, Indo-European languages
Pesetsky, David Michael (United States, 1957), transformational grammar
Keith Malcolm Petyt (UK, 1941), sociolinguistics
Phillipson, Robert (UK/Denmark, 1942), language policy
Pierrehumbert, Janet (United States, 1954), phonetics, phonology
Piller, Ingrid (Australia, 1967), applied linguistics, sociolinguistics, intercultural communication
Pinault, Georges-Jean (France, 1955), Tokharian, Indo-European linguistics
Pike, Kenneth Lee (United States, 19122000), English language, constructed languages, tagmemics
Pilch, Herbert (Germany, 19272018), Old English, Celtic languages, phonetics
Pimsleur, Paul (United States, 19271976), language acquisition, French language, phonetics
Pinker, Steven (Canada/United States, 1954), language acquisition, syntax, semantics
Piron, Claude (Switzerland, 19312008), Esperanto, psycholinguistics
Polinsky, Maria (United States), syntax, Austronesian languages
Pollard, Carl Jesse (United States, 1947), syntax, semantics
Pollock, Jean-Yves (France, 1946), syntax
Poplack, Shana (United States), sociolinguistics
Poppe, Nicholas (Russia, 18971991), Mongolic languages
Postal, Paul M. (United States, 1936), syntax, semantics
Pou, Saveros (Cambodia/France, 1929-2020), Khmer
Primer, Sylvester (United States, 18421912), English language, dialectology, phonetics, Germanic languages
Prince, Alan Sanford (United States, 1946), optimality theory, phonology
Prince, Ellen (United States, 19442010), pragmatics
Pulgram, Ernst (Austria/United States, 1915 2005), Romance languages, Italic languages
Pullum, Geoffrey K. (UK/United States, 1945), syntax, English language
Pustejovsky, James D. (United States, 1956), natural language processing, computational linguistics, semantics
== Q ==
Quirk, Charles Randolph (UK/Germany, 19202017), English language
== R ==
Radford, Andrew (UK, 1945), syntax, generative grammar, child language acquisition
Rael, Juan Bautista (United States, 19001993), phonology, morphology, New Mexican Spanish
Rankin, Robert L. (United States, 19392014), historical linguistics and Siouan linguistics
Rask, Rasmus Christian (Denmark, 17871832), lexicography, comparative linguistics, Indo-European language
Ratliff, Martha (United States, 1946), HmongMien languages, historical linguistics
Rauch, Irmengard (United States, 1933), Germanic languages, semiotics
Read, Allen Walker (United States, 19062002), etymology, lexicography, English language
Reinhart, Tanya (Israel, 19432007), syntax
Rice, Keren (Canada), phonology, morphology, Athapaskan languages
Rickford, John Russell (United States, 1949), sociolinguistics, African-American English
van Riemsdijk, Henk (Netherlands, 1948), prepositional phrases, free relatives, syntax, Germanic language
Rizzi, Luigi (Italy, 1952), syntax, language acquisition
Roberts, Ian G. (UK, 1957), syntax
Rock, Joseph Francis Charles (Austria/United States/PR China, 18841962), Naxi language, lexicography
Rosenblat, Ángel (Poland/Venezuela, 19021984), lexicography, Venezuelan Spanish, Philology
Ross, John Robert (United States, 19382025), semantics, syntax
Ross, Malcolm David (Australia, 1942), Austronesian languages, Papuan languages, historical linguistics, language contact
Rubach, Jerzy (Poland/United States, 1948), phonology, Polish language
Rubin, Philip E. (United States, 1949), articulatory synthesis, phonology
Ruhlen, Merritt (United States, 19442021), typology, historical linguistics

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date_saved: "2026-05-05T08:12:04.693680+00:00"
instance: "kb-cron"
---
== S ==
Sacks, Harvey (United States, 19351975), conversation analysis
Sadock, Jerrold (United States), syntax, morphology, pragmatics, Greenlandic language, Yiddish language
Sag, Ivan (United States, 19492013), syntax, construction grammar
Sagart, Laurent (France, 1951), Chinese linguistics and Austronesian languages
Sakaguchi, Alicja (Poland/Germany, 1954), interlinguistics, Esperanto
Shakirova, Liya (Soviet Union/Russia, 19212015), Russian language
Salo, David (United States, 1969), constructed languages, Tocharian languages, Elvish languages
Sampson, Geoffrey (UK, 1944), philosophy of language
Sánchez Carrión, José María (Spain, 1952), Basque language, sociolinguistics, historical linguistics
Sanders, Ted (Netherlands, 1963), Coherence in text, discourse
Sankoff, Gillian (Canada, 1943), sociolinguistics
Sankrityayan, Rahul (India, 18931963), Tibetan language, Hindi language
Sapir, Edward (Germany/United States, 18841939), Native American languages, constructed languages, semantics
Sarkar, Prabhat Ranjan (India, 19211990), Transliteration, Science of Letters
Saunders, Irene (United States/PR China), lexicography, Chinese language
de Saussure, Ferdinand (Switzerland/France, 18571913), semantics, Indo-European studies, structural linguistics
Saxon, Leslie (Canada), First Nations languages
Sayce, Archibald Henry (UK, 18461933), Akkadian language
Schegloff, Emanuel (United States, 1937), conversation analysis
Schleicher, August (Germany, 18211868), Indo-European studies, language development, historical linguistics
Schmidt, Johannes (Germany, 18431901), historical linguistics, Indo-European studies
Schmidt, Richard (United States, 19412017), second-language acquisition
Schmidt, Wilhelm (Germany/Austria/Switzerland, 18681954), MonKhmer languages
Searle, John Rogers (United States, 1932), philosophy of language, pragmatics
Selinker, Larry (United States), second-language acquisition
Sen, Sukumar (India, 19001992), Bengali language
Sequoyah (United States, 17671843), Cherokee language
Setälä, Eemil Nestor (Finland, 18641935), Finnish language, Uralic languages
Sgall, Petr (Czech Republic, 19262019), syntax
Shackle, Christopher (UK, 1942), Urdu language, Saraiki language
Shepard-Kegl, Judy (United States, 1953 ), Nicaraguan Sign Language
Shevoroshkin, Vitaly Victorovich (Russia/United States, 1932), Slavic languages, Nostratics
Shinmura Izuru (Japan, 18761967), Japanese language
Shipley, William F. (United States, 1921-2011), Maidu language
Sibawayh (Iran, ca. 760 796), Arabic language
Sidi Boushaki (Algeria, ca. 796857), Arabic language
Sievers, Eduard (Germany, 18501932), Germanic languages, historical linguistics
Siewierska, Anna (Poland/Netherlands/UK, 19552011), language typology
Sihler, Andrew Littleton (United States, 1941), comparative linguistics, Indo-European languages
Silvet, Johannes (Estonia, 18951979), lexicography
Sinclair, John McHardy (UK, 19332007), applied linguistics, corpus linguistics, discourse analysis
Skeat, Walter W. (UK, 18351912), Old English, Middle English, etymology, philology
Skinner, B.F. (United States, 19051992), verbal behavior
Skousen, Royal (United States, 1945), language modeling
Smith, Neilson Voyne (UK, 1939), syntax, language acquisition
Smith-Stark, Thomas (United States, 19482009), Mesoamerican languages
Smolensky, Paul (United States, 1955), phonology, optimality theory, syntax
Stachowski, Marek (Poland, 1957), historical linguistics, Turkic languages
Starostin, Georgiy Sergeevich (Russia, 1976), comparative linguistics, historical linguistics, Nostratics, Proto-World
Starostin, Sergei Anatolyevich (Russia, 19532005), comparative linguistics, historical linguistics, Nostratics, Proto-World
Stati, Sorin (Romania-French, 19312008), pragmatics, syntax
Steedman, Mark (UK, United States, 1946), theoretical linguistics, categorial grammar, syntax, computational linguistics
Steels, Luc (Belgium, 1952), computational linguistics, evolutionary linguistics
Steinmetz, Sol (United States, 19302011), Yiddish language
Stetson, Raymond Herbert (United States, d. 1950), phonetics
Stieber, Zdzisław (Poland, 19031980), Slavic languages, phonology
Stokoe, William (United States, 19192000), American Sign Language, cherology
Stollznow, Karen (United States, 1976), lexical semantics, sociolinguistics, cognitive linguistics
Stuart-Smith, Jane (United Kingdom, 1965), phonetics, sociolinguistics
Suzuki Takao (Japan, 19262021), Japanese language, sociolinguistics
Svoboda, Aleš (Czech Republic, 19412010), English language, Czech language, functional linguistics
Swadesh, Morris (United States, 19091967), typology, historical linguistics, Native American languages, lexicostatistics
de Swart, Henriette (Netherlands, 1961), semantics
Sweet, Henry (UK, 18451912), Germanic languages, phonetics
Sweetser, Eve (United States), cognitive linguistics, semantics, historical linguistics, Celtic languages
== T ==
Talmy, Leonard (United States, 1942), cognitive linguistics, semantics, Yiddish language, Native American languages
Tannen, Deborah Frances (United States, 1945), discourse analysis
Tarone, Elaine (United States, 1962), second-language acquisition
Tarpent, Marie-Lucie (Canada, 1941), Tsimshianic languages
Tha Myat (Burma, 18991977), Mon language, Burmese language, Pyu language, Nagari
Teeter, Karl van Duyn (United States, 1929 2007), Algic languages, endangered languages
Thieberger, Nicholas (Australia), Indigenous Australian languages
Thomas, Calvin (United States, 18541919), Germanic languages, German language
Thomason, Sarah Grey (United States, 1939), language contact, historical linguistics, typology, Montana Salish
Thompson, John Eric Sidney (UK, 1898 1975), Maya languages, Maya hieroglyphics
Thompson, Sandra A. (United States, 1941), syntax, discourse analysis, Mandarin language
Tokieda Motoki (Japan, 19001967), Japanese language
Tolkien, John Ronal Reuel (UK, 18921973), Old English language, constructed languages, Sindarin, Quenya
Toporišič, Jože (Slovenia, 19262014), Slovene language
Trager, George Leonard (United States, 19061992), phonemics, paralanguage, semantics
Trask, Robert Lawrence (United States, 19442004), Basque language, historical linguistics, origin of language
Traugott, Elizabeth C. (United States, 1939), grammaticalization
Troy, Jakelin (Australia, 1960), Aboriginal Australian languages, language revival, indigenous languages of Pakistan
Trubetzkoy, Nikolai Sergeyevich (Russia/Austria, 18901938), structural linguistics, morphology, phonology
Trudgill, Peter (UK, 1943), sociolinguistics, English language, dialectology
Tuite, Kevin (United States, 1954), Caucasian languages, Georgian language
Turin, Mark (UK, 1973), Himalayan languages, endangered languages
Turner, Mark (United States, 1954), cognitive linguistics
Tucker, Archibald (South Africa, 19041980), African languages
== U ==
Uldall, Elizabeth T. (United States, 19132004), phonetics
Uldall, Hans Jørgen (Denmark, 19071957), glossematics, Maidu language
Ullendorff, Edward (UK, 19202011), Semitic languages
Unger, James Marshall (United States, 1947), Japanese language, historical linguistics, writing systems
Upton, Clive (UK, 1946), English language, sociolinguistics, dialectology
== V ==
Vajda, Edward (United States, 1958), Ket language, historical linguistics, Na-Dené languages, comparative linguistics
van Valin, Robert D. (United States, 1952), syntax, semantics, cognitive linguistics
van Wijk, Nicolaas (Netherlands, 18801941), historical linguistics, Balto-Slavic languages
Valli, Clayton (United States, 19512003), American Sign Language,
Vasmer, Max (Russia/Germany, 18861962), etymology, historical linguistics, Russian language
Vassalli, Mikiel Anton (Malta, 17641829), Maltese language
Vaux, Bert (United States, 1968), phonology, morphology, Armenian language
Veltman, Calvin (United States/Canada/France, 1941), sociolinguistics
Vendler, Zeno (United States, 19212004), philosophy of language, event structure
Ventris, Michael George Francis (UK, 19221956), Linear B, Archaic Greek
Verner, Karl (Denmark, 18461896), phonology, comparative linguistics, historical linguistics
Vincent, Nigel (UK, 1947), morphology, syntax, historical linguistics
Voegelin, Charles F. (United States, 19061986), indigenous languages of North America
Voegelin, Florence M. (United States, 19271989), Hidatsa language
Voloshinov, Valentin Nikolaevich (Russia, 18951936), semantics
Vovin, Alexander (Russia/United States, 19612022), Japanese language, Siberian languages, Korean language, Ainu language, Central Asian languages

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== W ==
Wackernagel, Jacob (Switzerland, 18531938), Indo-European studies, Sanskrit
Wang Li (PR China, 19001986), Chinese language
Watanabe Shōichi (Japan, 19302017), Japanese language
Watkins, Calvert (United States, 19332013), comparative linguistics, Indo-European languages
Weeks, Raymond (United States, 18631954), phonetics, French language
Weinreich, Max (Latvia/United States, 1893 1969), Yiddish language
Weinreich, Uriel (Poland/United States, 19261967), sociolinguistics, dialectology, semantics, Yiddish language
Wells, John Christopher (UK, 1939), phonetics, Esperanto
Westermann, Diedrich Hermann (Germany, 18751956), languages of Africa, typology
Westphal, Ernst Oswald Johannes (South Africa/UK, 19191990), Bantu languages, Khoisan languages
Whalen, Douglas H. (United States), phonology, endangered languages
Wheeler, Benjamin Ide (United States, 18541927), historical linguistics, comparative linguistics, Greek language
White, Lydia (UK/Canada, 1946), second-language acquisition
Whitney, William Dwight (United States, 18271894), lexicography, Sanskrit, English language
Wilks, Yorick (UK, 19392023), artificial intelligence, computational linguistics, natural language processing, semantics
Whorf, Benjamin Lee (United States, 18971941), Native American languages, Maya script, linguistic relativity
Wichmann, Søren (Denmark, 1964), Mesoamerican languages, MixeZoque languages, Mayan languages, Maya script
Widdowson, Henry G. (UK, 1935), English language, discourse analysis
Wierzbicka, Anna (Poland/Australia, 1938), semantics, pragmatics
Wiese, Richard (Germany, 1953), phonology, morphology, neurolinguistics
Williams, Nicholas Jonathan Anselm (UK/Ireland, 1942), Cornish language, Irish language, Manx language, phonology
Williams, Samuel Wells (United States/China, 18121884), Chinese language, lexicography
Wilson, Robert Dick (United States, 18561930), comparative linguistics, Hebrew language, Syriac language
Wittmann, Henri (France/Canada, 1937), French language, creole languages, morphology, comparative linguistics
Wodak, Ruth (Austria/UK, 1950), discourse analysis
Wolvengrey, Arok (Canada, 1965), Cree language, syntax, Native American languages, lexicography
Worcester, Samuel (17981859), Presbyterian missionary, linguist, co-founder of Cherokee Phoenix with Elias Boudinot (first Cherokee newspaper in Indian Territory)
Wright, Alfred (United States, 17881853), Presbyterian minister, physician, linguist, Choctaw language
Wurm, Stephen Adolphe (Hungary/Australia, 19222001), Australian Aboriginal languages, Papuan languages
== Y ==
Yeda Pessoa de Castro (Brazil), African languages
Yamada Yoshio (Japan, 18731958), Japanese language
Yiakoumetti, Androula (Cyprus), Greek language, dialectology
Yip, Virginia (Hong Kong, 1962), bilingual language acquisition, Sinitic grammar
Yngve, Victor (United States, 19202012), computational linguistics, natural language processing
Young, Robert W. (United States, 19122007), Navajo language, lexicography
== Z ==
Zamenhof, Ludwik Łazarz (Poland, 18591917), Esperanto
Zepeda, Ofelia (United States, 1952), O'odham language
Zhang, Niina Ning (PR China), formal syntax, morphology
Zhou Youguang (PR China, 19062017), orthography, Romanization of Chinese
Zuazo, Koldo (Spain, 1956), Basque dialectology, sociolinguistics
Zuckermann, Ghil'ad (Israel, Italy, UK, Australia, 1971), contact linguistics, lexicology, revival linguistics
Zwicky, Arnold (United States, 1940), syntax, morphology
== See also ==
List of women linguists
List of Russian linguists and philologists
List of Jewish American linguists
List of lexicographers
== Notes ==

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This following list features abbreviated names of mathematical functions, function-like operators and other mathematical terminology.
This list is limited to abbreviations of two or more letters (excluding number sets). The capitalization of some of these abbreviations is not standardized different authors might use different capitalizations.
== A ==
A adele ring or algebraic numbers.
a.a.s. asymptotically almost surely.
AC Axiom of Choice, or set of absolutely continuous functions.
a.c. absolutely continuous.
acrd inverse chord function.
ad adjoint representation (or adjoint action) of a Lie group.
adj adjugate of a matrix.
a.e. almost everywhere.
AFSOC - Assume for the sake of contradiction
Ai Airy function.
AL Action limit.
Alt alternating group (Alt(n) is also written as An.)
A.M. arithmetic mean.
AP arithmetic progression.
arccos inverse cosine function.
arccosec inverse cosecant function. (Also written as arccsc.)
arccot inverse cotangent function.
arccsc inverse cosecant function. (Also written as arccosec.)
arcexsec inverse exsecant function.
arcosech inverse hyperbolic cosecant function. (Also written as arcsch.)
arcosh inverse hyperbolic cosine function.
arcoth inverse hyperbolic cotangent function.
arcsch inverse hyperbolic cosecant function. (Also written as arcosech.)
arcsec inverse secant function.
arcsin inverse sine function.
arctan inverse tangent function.
arctan2 inverse tangent function with two arguments. (Also written as atan2.)
arg argument of.
arg max argument of the maximum.
arg min argument of the minimum.
arsech inverse hyperbolic secant function.
arsinh inverse hyperbolic sine function.
artanh inverse hyperbolic tangent function.
a.s. almost surely.
atan2 inverse tangent function with two arguments. (Also written as arctan2.)
A.P. arithmetic progression.
Aut automorphism group.
== B ==
bd boundary. (Also written as fr or ∂.)
Bi Airy function of the second kind.
BIDMAS Brackets, Indices, Divide, Multiply, Add, Subtract.
Bias bias of an estimator .
BWOC by way of contradiction.
== C ==
C complex numbers.
Card cardinality of a set. (Card(X) is also written #X, ♯X or |X|.)
cas cos + sin function.
cdf cumulative distribution function.
c.f. cumulative frequency.
c.c. complex conjugate.
char characteristic of a ring.
Chi hyperbolic cosine integral function.
Ci cosine integral function.
cis cos + i sin function. (Also written as expi.)
Cl conjugacy class.
cl topological closure.
CLT central limit theorem.
cod, codom codomain.
cok, coker cokernel.
colsp column space of a matrix.
conv convex hull of a set.
Cor corollary.
corr correlation.
cos cosine function.
cosec cosecant function. (Also written as csc.)
cosech hyperbolic cosecant function. (Also written as csch.)
cosh hyperbolic cosine function.
cosiv coversine function. (Also written as cover, covers, cvs.)
cot cotangent function. (Also written as ctg.)
coth hyperbolic cotangent function.
cov covariance of a pair of random variables.
cover coversine function. (Also written as covers, cvs, cosiv.)
covercos covercosine function. (Also written as cvc.)
covers coversine function. (Also written as cover, cvs, cosiv.)
crd chord function.
CRT Chinese remainder theorem.
csc cosecant function. (Also written as cosec.)
csch hyperbolic cosecant function. (Also written as cosech.)
ctg cotangent function. (Also written as cot.)
curl curl of a vector field. (Also written as rot.)
cvc covercosine function. (Also written as covercos.)
cvs coversine function. (Also written as cover, covers, cosiv.)
== D ==
def define or definition.
deg degree of a polynomial, or other recursively defined objects such as well-formed formulas. (Also written as ∂.)
del del, a differential operator. (Also written as
{\displaystyle \nabla }
.)
det determinant of a matrix or linear transformation.
DFT discrete Fourier transform.
dim dimension of a vector space.
div divergence of a vector field.
DNE a solution for an expression does not exist, or is undefined. Generally used with limits and integrals.
dom, domain domain of a function. (Or, more generally, a relation.)
== E ==
End categories of endomorphisms.
Ei exponential integral function.
epi epigraph of a function.
Eqn equation.
erf error function.
erfc complementary error function.
erfcx scaled complementary error function.
erfi imaginary error function.
etr exponent of the trace.
excsc excosecant function. (Also written as coexsec.)
exsec exsecant function.
exp exponential function. (exp x is also written as ex.)
expi cos + i sin function. (Also written as cis.)
expm1 exponential minus 1 function. (Also written as exp1m.)
exp1m exponential minus 1 function. (Also written as expm1.)
Ext Ext functor.
ext exterior.
extr a set of extreme points of a set.
== F ==
FFT fast Fourier transform.
FIP finite intersection property.
FOC first order condition.
FOL first-order logic.
fr boundary. (Also written as bd or ∂.)
Frob Frobenius endomorphism.
FT Fourier transform.
FTA fundamental theorem of arithmetic or fundamental theorem of algebra.
== G ==
Gal Galois group. (Also written as Γ.)
gcd greatest common divisor of two numbers. (Also written as hcf.)
gd Gudermannian function.
GF Galois field.
GF generating function.
GL general linear group.
G.M. geometric mean.
glb greatest lower bound. (Also written as inf.)
G.P. geometric progression.
grad gradient of a function.
graph graph of a function.

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== H ==
H quaternion numbers.
hacover hacoversine function. (Also written as hacovers, hcv.)
hacovercos hacovercosine function. (Also written as hcc.)
hacovers hacoversine function. (Also written as hacover, hcv.)
hav haversine function. (Also written as sem.)
havercos havercosine function. (Also written as hvc.)
h.c. Hermitian conjugate, often used as part of + h.c. (Also written as H.c.)
hcc hacovercosine function. (Also written as hacovercos.)
hcv hacoversine function. (Also written as hacover, hacovers.)
hcf highest common factor of two numbers. (Also written as gcd.)
H.M. harmonic mean.
HOL higher-order logic.
Hom Hom functor.
hom hom-class.
hot higher order term.
HOTPO half or triple plus one.
hvc havercosine function. (Also written as havercos.)
hyp hypograph of a function.
== I ==
iff if and only if.
IH induction hypothesis.
iid independent and identically distributed random variables.
Im imaginary part of a complex number. (Also written as
{\displaystyle \Im }
.)
im image.
inf infimum of a set. (Also written as glb.)
int interior.
I.o. Infinitely often.
== K ==
ker kernel.
== L ==
lb binary logarithm (log2). (Also written as ld.)
lcm lowest common multiple (a.k.a. least common multiple) of two numbers.
LCHS locally compact Hausdorff second countable.
ld binary logarithm (log2). (Also written as lb.)
lsc lower semi-continuity.
lerp linear interpolation.
lg common logarithm (log10) or binary logarithm (log2).
LHS left-hand side of an equation.
Li offset logarithmic integral function.
li logarithmic integral function or linearly independent.
lim limit of a sequence, or of a function.
lim inf limit inferior.
lim sup limit superior.
LLN law of large numbers.
ln natural logarithm, loge.
lnp1 natural logarithm plus 1 function.
ln1p natural logarithm plus 1 function.
log logarithm. (If without a subscript, this may mean either log10 or loge.)
logh natural logarithm, loge.
LST language of set theory.
lub least upper bound. (Also written sup.)
== M ==
max maximum of a set.
MGF moment-generating function.
M.I. mathematical induction.
min minimum of a set.
mod modulo.
Mp metaplectic group.
mtanh modified hyperbolic tangent function. (Also written as mth.)
mth modified hyperbolic tangent function. (Also written as mtanh.)
mx matrix.
== N ==
N natural numbers.
NAND not-and in logic.
No. number.
NOR not-or in logic.
NTS need to show.
Null, null (See Kernel.)
Nullity, nullity nullity.
== O ==
O octonion numbers.
OBGF ordinary bivariate generating function.
ob object class.
ODE - ordinary differential equation
ord ordinal number of a well-ordered set.
O/W - otherwise.
== P ==
pdf probability density function.
pf proof.
PGL projective general linear group.
Pin pin group.
pmf probability mass function.
Pn previous number.
Pr probability of an event. (See Probability theory. Also written as P or
P
{\displaystyle \mathbb {P} }
.)
probit probit function.
PRNG pseudorandom number generator.
PSL projective special linear group.
PNT prime number theorem.
PRP probable prime.
PSO projective orthogonal group.
PSU projective special unitary group.
PU projective unitary group.
== Q ==
Q rational numbers.
QED "Quod erat demonstrandum", a Latin phrase used at the end of a definitive proof.
QEF "Quod erat faciendum", a Latin phrase sometimes used at the end of a geometrical construction.
== R ==
R real numbers.
ran range of a function.
rank rank of a matrix. (Also written as rk.)
Re real part of a complex number. (Also written
{\displaystyle \Re }
.)
resp respectively.
RHS right-hand side of an equation.
rk rank. (Also written as rank.)
RMS, rms root mean square.
rng non-unital ring.
rot rotor of a vector field. (Also written as curl.)
rowsp row space of a matrix.
RTP required to prove.
RV random variable. (Also written as R.V.)
== S ==
S sedenion numbers.
SD standard deviation.
SE standard error.
sec secant function.
sech hyperbolic secant function.
seg initial segment of.
sem haversine function. (Also written as hav.)
SFIP strong finite intersection property.
sgn sign function.
Shi hyperbolic sine integral function.
Si sine integral function.
sigmoid sigmoid function.
sin sine function.
sinc sinc function.
sinh hyperbolic sine function.
siv versine function. (Also written as ver, vers.)
SL special linear group.
SO special orthogonal group.
SOC second order condition.
Soln solution.
Sp symplectic group.
Sp trace of a matrix, from the German "spur" used for the trace.
sp, span linear span of a set of vectors. (Also written with angle brackets.)
Spec spectrum of a ring.
Spin spin group.
sqrt square root.
s.t. such that or so that or subject to.
st standard part function.
STP [it is] sufficient to prove.
SU special unitary group.
sup supremum of a set. (Also written as lub, which stands for least upper bound.)
supp support of a function.
swish swish function, an activation function in data analysis.
Sym symmetric group (Sym(n) is also written as Sn) or symmetric algebra.
== T ==
T trigintaduonion numbers.
tan tangent function. (Also written as tgn, tg.)
tanh hyperbolic tangent function.
TFAE the following are equivalent.
tg tangent function. (Also written as tan, tgn.)
tgn tangent function. (Also written as tan, tg.)
Thm theorem.
Tor Tor functor.
Tr field trace.
tr trace of a matrix or linear transformation. (Also written as Sp.)

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== U ==
undef a function or expression is undefined.
usc upper semi-continuity.
== V ==
V volume.
var variance of a random variable.
vcs vercosine function. (Also written as vercos.)
ver versine function. (Also written as vers, siv.)
vercos vercosine function. (Also written as vcs.)
vers versine function. (Also written as ver, siv.)
== W ==
W^5 which was what we wanted. Synonym of Q.E.D.
walog without any loss of generality.
wff well-formed formula.
whp with high probability.
wlog without loss of generality.
WMA we may assume.
WO well-ordered set.
WOP well-ordered principle.
w.p. with probability.
wp1 with probability 1.
wrt with respect to or with regard to.
WTP want to prove.
WTS want to show.
== X ==
XOR exclusive or in logic.
== Z ==
Z integer numbers.
ZF ZermeloFraenkel axioms of set theory.
ZFC ZermeloFraenkel axioms (with the Axiom of Choice) of set theory.
== See also ==
List of letters used in mathematics, science, and engineering
ISO 31-11
Language of mathematics
List of mathematical jargon
Mathematical notation
Notation in probability and statistics
Physical constants
List of logic symbols
Glossary of mathematical symbols
Mathematical operators and symbols in Unicode
List of mathematical functions
== References ==

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title: "List of mathematical artists"
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This is a list of artists who actively explored mathematics in their artworks. Art forms practised by these artists include painting, sculpture, architecture, textiles and origami.
Some artists such as Piero della Francesca and Luca Pacioli went so far as to write books on mathematics in art. Della Francesca wrote books on solid geometry and the emerging field of perspective, including De Prospectiva Pingendi (On Perspective for Painting), Trattato dAbaco (Abacus Treatise), and De corporibus regularibus (Regular Solids), while Pacioli wrote De divina proportione (On Divine Proportion), with illustrations by Leonardo da Vinci, at the end of the fifteenth century.
Merely making accepted use of some aspect of mathematics such as perspective does not qualify an artist for admission to this list.
The term "fine art" is used conventionally to cover the output of artists who produce a combination of paintings, drawings and sculptures.
== List ==
== References ==
== External links ==
Saint Louis University: List of mathematical artists, by field

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title: "List of mathematical topics in classical mechanics"
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This is a list of mathematical topics in classical mechanics, by Wikipedia page. See also list of variational topics, correspondence principle.
== Newtonian physics ==
Newton's laws of motion
Inertia,
Kinematics, rigid body
Momentum, kinetic energy
Parallelogram of force
Circular motion
Rotational speed
Angular speed
Angular momentum
torque
angular acceleration
moment of inertia
parallel axes rule
perpendicular axes rule
stretch rule
centripetal force, centrifugal force, Reactive centrifugal force
LaplaceRungeLenz vector
Euler's disk
elastic potential energy
Mechanical equilibrium
D'Alembert's principle
Degrees of freedom (physics and chemistry)
Frame of reference
Inertial frame of reference
Galilean transformation
Principle of relativity
== Conservation laws ==
Conservation of momentum
Conservation of linear momentum
Conservation of angular momentum
Conservation of energy
Potential energy
Conservative force
Conservation of mass
== Law of universal gravitation ==
Projectile motion
Kepler's laws of planetary motion
Escape velocity
Potential well
Weightlessness
Lagrangian point
N-body problem
KolmogorovArnoldMoser theorem
Virial theorem
Gravitational binding energy
Speed of gravity
Newtonian limit
Hill sphere
Roche lobe
Roche limit
== Hamiltonian mechanics ==
Phase space
Symplectic manifold
Liouville's theorem (Hamiltonian)
Poisson bracket
Poisson algebra
Poisson manifold
Antibracket algebra
Hamiltonian constraint
Moment map
Contact geometry
Analysis of flows
Nambu mechanics
== Lagrangian mechanics ==
Action (physics)
Lagrangian
EulerLagrange equations
Noether's theorem

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title: "List of multilingual countries and regions"
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This is an incomplete list of areas with either multilingualism at the community level or at the personal level.
There is a distinction between social and personal bilingualism. Many countries, such as Belarus, Belgium, Canada, Finland, India, Ireland, South Africa and Switzerland, which are officially multilingual, may have many monolinguals in their population (Canada exemplifies this situation, as it is a country in which western provinces are predominantly anglophone while the province of Quebec, along with the bilingual New Brunswick, emphasize French prominence in the eastern side). Officially monolingual countries, on the other hand, such as France, can have sizable multilingual populations. Some countries have official languages but also have regional and local official languages, notably Brazil, China, Indonesia, Mexico, Philippines, Russia, Spain and Taiwan.
== Africa ==
=== Central Africa ===
Cameroon: French and English (both official), as well as Cameroonian Pidgin. Many ethnic and tribal languages including Basaa, Duala, Manenguba, Bikya, Bung, Fula, Kanuri, Ngumba, Yeni, Bamum, Bafia, Bakweri language and many others. Some also have fluency in the German, Portuguese and Spanish languages.
Central African Republic: French & Sango (both official) and 50 other African languages.
Chad: French and Arabic (both official) + more than 100 African languages.
Democratic Republic of the Congo: French (official) + Lingala, Kongo, Swahili & Tshiluba (national languages) + 238 other languages.
Equatorial Guinea: Spanish, French and Portuguese are the official languages of the country. Fang, Bube, Igbo, Pidgin English, Annobonese are also spoken.
Republic of the Congo: French (official), Lingala and Kituba national languages plus other dialects, including Kikongo and Kituba.
=== East Africa ===
Burundi: Kirundi (national and official), French and English (both official).
Kenya: English (official), Swahili (national and official) and 100+ other languages (Bantu, Nilotes, Cushites, Indians).
Rwanda: Kinyarwanda, English, French and Swahili are all official languages. Kinyarwanda is the national language. English is the medium of instruction and the primary language of government and business.
Seychelles: French, English & Seychellois Creole are official.
Tanzania: Swahili is the national language and English and many other indigenous languages. Swahili and English are de facto official languages and Arabic is spoken in Zanzibar.
Uganda: English (official), Swahili (second official), Arabic, Luganda, other Bantu and. Nilo-Saharan languages.
=== Horn of Africa ===
Djibouti: French and Arabic (official) plus Somali (official) & Afar.
Eritrea: Tigrinya, Arabic and English are predominantly used in commerce and government affairs. The use and development of nine Eritrean languages (Tigrinya, Bilen, Afar, Saho, Rashaida, Tigre, Kunama, Nara and Hidarib) is encouraged at the local level and children attend primary school through the fifth grade in their mother tongue. Italian is an additional language spoken in commerce.
Ethiopia: The federal working language is Amharic. At a regional level, working languages are Tigrigna in Tigray, Afarigna in Afar, Afaan Oromoo in Oromia, Somali in Somali region, and Harari in Harari region.
Somalia: Somali (official) and Arabic ("second language" official). plus English and Italian (foreign languages).
=== North Africa ===
Algeria: Classic Arabic and Amazigh (both official and national language in the constitution) plus Algerian Arabic and French (in media, education and business).
Egypt: Arabic (official), Coptic, Egyptian Arabic, English and French.
Libya: Arabic (official), Amazigh, Tamahaq, Italian and English.
Mauritania: Arabic (official and national), French, Poular, Soninke, and Wolof (national).
Morocco: Arabic and Amazigh (co-official). Moroccan Arabic, Hassaniya (present in the media), French (its wide use in education is legally established), Spanish.
Western Sahara (under Moroccan control): Hassaniya, Berber, Moroccan Arabic, Spanish and French.
Sahrawi Arab Democratic Republic (in exile): Arabic (official) and Spanish (official) and French.
Sudan: Arabic and English (official working languages) plus indigenous African languages.
South Sudan: Arabic, English and other indigenous languages.
Tunisia: Modern Standard Arabic (official), Tunisian Arabic, French, Berber language, and English language.
=== Southern Africa ===
Angola: Portuguese (official language), Cokwe, Kikongo, Oshiwambo, Umbundu, Kimbundu and 32 additional indigenous African languages
Botswana: English, Tswana, Kalanga, Khoi, Herero, Afrikaans, Nama, San, Ndebele, Sign language, and 21 others.
Comoros: Comorian, French (official) and Arabic.
Eswatini (Swaziland): English and Swati.
Lesotho: English and Sotho.
Madagascar: French and Malagasy.
Malawi: Chewa (de facto language of national identity) and English (statutory national working language). Both are official.
Mauritius: English (official, national), French (administrative, national), Mauritian Creole (lingua franca), Hindi, Mandarin, Tamil, Telugu, Hakka, Urdu, Marathi, Bhojpuri and Arabic.
Mozambique: Portuguese (official language) and 43 additional indigenous African languages
Namibia: English (official), German, Afrikaans, and Ovambo (recognised regional languages)
South Africa: Afrikaans, English, Ndebele, Northern Sotho, Sotho, Swazi, Tswana, Tsonga, Venda, Xhosa, Zulu (co-official), sign language, Khoi, Nama and San (the languages, which the government is obliged to promote and to create conditions for their development).
Zambia: English (official), Bemba, Nyanja, Tonga, Lozi, Lunda, Kaonde, Luvale, Ila, Mambwe, Namwanga, Tumbuka, Aushi, Lenje, Lala and Lamba, and 57 others (72 in total).
Zimbabwe: Chewa, Chibarwe, English, Kalanga, Koisan, Nambya, Ndau, Ndebele, Shangani, Shona, sign language, Sotho, Tonga, Tswana, Venda and Xhosa (officially recognised).

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=== West Africa ===
Benin: French (official) and many indigenous languages including Fon, Yoruba & Songhay (specifically Dendi).
Burkina Faso: French (official), Moore and Jula (regional languages) and indigenous Sudanic languages.
Cape Verde: Portuguese and Cape Verdean Creole.
Côte d'Ivoire: French (official), Baule, Jula, and 60 other indigenous languages.
Gambia: English (official), Mandinka, Wolof, Fula and others.
Ghana: English (official), Akan, Dagaare/Wale, Dagbane, Dangme, Ewe, Ga, Gonja, Kasem, Nzema and 70 others.
Guinea: French (official), Maninka, Fula and Susu.
Guinea-Bissau: Portuguese (official), Kriol and indigenous languages.
Liberia: English (official) and 20 African languages.
Mali: French (official), Bambara (most widely spoken), Fula and Songhay (specifically Dendi). 11 languages are used as mediums of instruction in primary schools
Niger: French (official) plus ten other languages recognised as national ones, including Hausa (spoken by half the population) and Songhay (specifically Zarma)
Nigeria: English (official), Yoruba, Hausa and Igbo are the four languages of the parliament (each of which has over 20 million speakers) plus 529 other African languages (some of which have over a million speakers) and Pidgin.
Senegal: French (official), Wolof (widely spoken), Fula (specifically Pulaar), Diola, Malinké, Sérère, Soninké (national languages) plus other African languages
Sierra Leone: English (official), Krio (most widely spoken), Mende, Temne and other African languages
Togo: French (official), Ewe, Mina and Kabiyé.
== Americas ==
=== Caribbean ===
Antigua and Barbuda: No official language at national or local level. Antiguan and Barbudan Creole and English both spoken by majority of the population. Guyanese Creole and Jamaican Patois spoken by over 5% of the population each. Bilingual government services are often provided in Spanish.
Aruba: Papiamento and Dutch are the official languages, with Spanish and English also widely spoken. All four languages are taught in schools.
Caribbean Netherlands Dutch (overall), English (Sint Eustatius and Saba) and Papiamentu (Bonaire).
Curaçao Papiamento, Dutch and English are official languages. Spanish is also widely spoken.
Haiti: Creole and French
Jamaica: English and Jamaican Patois
Puerto Rico's official languages and languages of legislature are Spanish and English, yet 85 percent of its inhabitants reported that they did not speak English "very well."
Saint Lucia: English and Saint Lucian French Creole
Trinidad and Tobago in the predominantly Trinidadian English Creole-speaking country where Trinidadian English is official, Spanish was introduced as the second language of bilingual traffic signs and is spoken among 5% of the population fluently. and is generally the "first foreign language". Trinidadian Hindustani is rarely used, only spoken among Indo Trinidadian families, mostly the elders who preserve their ancestral language. Sanskrit/Hindi is also used when singing songs of East Indian origins and in the Hindu Temples. Trinidadian French Creole (Patois) is widely spoken in the communities of the northern suburbs of Port of Spain such as Maraval and Paramin, where there are descendants of the early French Immigrants to Trinidad.
=== Central America ===
Belize: English, Spanish and Mayan languages have some official usage, although the legacy of British rule emphasised English to be most commonly used for official purposes though the majority are Hispanophone.
Guatemala has one official language which is Spanish; however, there are 22 distinct Mayan languages. Maya, Garifuna and Xincan languages are recognized to be essential elements of the national identity.
Honduras: Spanish is the official language, despite Afro-Caribbean English, Garifuna and indigenous languages can be found in the rural outskirts of the country.
In Nicaragua, even while Spanish is the official language (spoken by almost 95%, according to some sources), there are other de facto languages such as Creole, English, Miskitu, Rama and Mayangna (Sumu) in their own linguistic communities. According to the Constitution, the languages of the Atlantic Coasts should be used officially in cases established by law.
In Panama, Spanish is the official language, and seven indigenous languages have been given official recognition

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=== Northern Europe ===
Denmark has one official language, Danish, but in South Jutland, use of German for certain functions is provided for. In Greenland, Greenlandic is the principal language, while Danish must be thoroughly taught, and all Greenlanders are Danish-Greenlandic bilinguals.
Faroe Islands has two official languages: Faroese and Danish. The other Scandinavian languages, Norwegian and Swedish, are understood by most without much difficulty. English is taught in schools, often as a third language.
Finland is constitutionally bilingual and has therefore two equally national languages, Finnish and Swedish, and the minority languages Sami (Northern Sami, Inari Sami and Skolt Sami), Romani and Finnish Sign Language are recognized by the constitution. The Swedish-speaking population of Finland comprises about 5.5% of the population, mostly in Svenskfinland. Municipalities are bilingual if the Swedish or Finnish minority is at least 68%. Åland is monolingually Swedish by law. Sami is an official language (besides Finnish) in the municipalities of northern Finland.
In Norway six municipalities of Troms and Finnmark county, Sami is used officially along Norwegian. In addition, kvensk, romani and romanes have status as minority languages.
Sweden has Swedish as its official language. Finnish, Meänkieli, Romani, Sami and Yiddish are recognized as minority languages. Meänkieli, a variant of Finnish, is spoken in Tornedalen and Haparanda in North Bothnia. Meänkieli, Finnish and Sami have a special status in the areas where speakers are significant minorities.
=== Southern Europe ===
Italy. The official language overall is Italian. However, the Italian law n. 482/1999 recognizes and protects twelve minority languages, like Sardinian, Friulian, Occitan, Greek, Albanian and other linguistic minorities. Bilingualism is also applied in some territories:
In the province of South Tyrol German is co-official.
In the Aosta Valley region French is co-official,
as is Slovene in some municipalities of the provinces of Trieste and Gorizia.
Ladin municipalities of South Tyrol are trilingual (Italian, Ladin, and German).
In Veneto, there is a regional law on Venetian linguistic and cultural heritage. In 2016, an additional law has been adopted, providing for the use of Venetian in schools, public institutions and toponymical signs.
In Calabria, there is a regional law on minority languages, with Greek, Albanian and Franco-Provençal specifically named.
In Piedmont, there is a regional law on promoting linguistic heritage, with Occitan, German, French and Franco-Provençal minorities specifically named.
In Sardinia, a 1997 law and a 2018 law establish detailed status for Sardinian, and give official recognition to Catalan in Alghero and to Gallurese, Tabarchino and Sassarese.
Malta has two official languages, Maltese and English. Italian is also spoken by a large percentage of the population.

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=== Southeastern Europe ===
Albania has one official language, Albanian. In some regions of southern Albania, Greek serves as co-official. Other languages such as Italian and Greek are widely spoken throughout the country, and are considered minority languages. Recognised minority languages include: Aromanian, Romanian, Serbo-Croatian, Macedonian, Bulgarian, French, Italian and Greek. The majority of Albanians are multilingual, speaking more than 3 languages, which is due to the large number of Albanian immigrants in Europe and elsewhere, as well as political and socio-cultural relations with their neighbours. As a consequence, Albanians are considered one of the most linguistically diverse peoples in Europe. During Albania's Italian occupation and the subsequent communist period, Italian television and radio were a source of education and entertainment for many Albanians; as a result, 6070% of Albania's population has a command of Italian. Albania's Greek communities, as well as returning migrants from Greece and Greek national arrivals, continue to raise the status of Greek in the country. Albania is also part of the Francophonie, with 320,000 French speakers.
In Bulgaria, the official language is Bulgarian, but significant minority languages are recognized at a local level, with commitments made in respect of use of Romanian, Czech, Croatian, German, Hungarian, Russian, Serbian, Slovak, Turkish and Ukrainian in areas where their share of speakers is at least 20%. The biggest ethnic minority is the Turkish community of 508,378 (8.5%). Bulgaria is also part of the Francophonie, with 320,000 French speakers.
Moldova the Law concerning the rights of persons belonging to the national minorities and the legal status of the organizations thereof provides for the use of Romanian and Russian in tertiary education, communication with authorities and publishing regulatory acts. It also provides for the use of Ukrainian, Gagauz, Bulgarian, Hebrew, Yiddish and other (unnamed) languages in education.
Gagauzia Romanian, Gagauz, Russian
Transnistria Moldovan, Russian, Ukrainian
In Romania, the official language is Romanian, but significant minority languages are recognized at a local level, with commitments made in respect of use of Bulgarian, Czech, Croatian, German, Hungarian, Russian, Serbian, Slovak, Turkish and Ukrainian in areas where their share of speakers is at least 20%. The biggest ethnic minority is the Hungarian community of 1.4 million (6.6%).
In successor countries of the former SFR Yugoslavia, official languages of Serbian, Croatian, Bosnian and Montenegrin are mutually intelligible by all four groups (see Serbo-Croatian). Other smaller languages in the new republics of Slovenia (Slovene) and North Macedonia (Macedonian) are not. There are other languages that have co-official status in some parts of these countries (e.g. Italian in Istria, Hungarian in Vojvodina).
Croatia the Constitution of Croatia defines Croatian as the official language of the country while permitting regional or local co-official usage of minority languages of Croatia and Cyrillic or other alphabets. The Istria County is the only bilingual region with Italian language as its second official language. At the level of local self-government units municipalities and towns with second official languages are primarily influenced in their policy by the Constitutional Act on the Rights of National Minorities in the Republic of Croatia and other national and international legal norms.
Kosovo has two official languages, Albanian and Serbian. Turkish, Bosnian, and Roma hold official status at a regional level.
Serbia: There are seven officially used languages in the northern autonomous province of Vojvodina (Serbian, Croatian, Romanian, Ruthenian, Hungarian, Slovak and Czech), and four in central Serbia (Serbian, Bosnian, Albanian and Bulgarian). Vojvodina has a multi-ethnic, multi-cultural and multi-lingual identity, with a number of mechanisms for the promotion of minority rights; there are more than 26 ethnic groups in the province. The province has six official languages. Some Serbs are recognised as fluent multilinguals; many of them can speak German, French and English, due to the huge number of Serbian immigrants in Europe, especially in Austria, Germany and France, whilst English is quite popular due to the large Serbian immigrant communities in Australia and Canada.
North Macedonia in 2019, Albanian was made co-official, while Macedonian remains the primary official language.
=== Southwestern Europe ===
Andorra has one official language, Catalan. Other languages (mainly Spanish, French and Portuguese) are also spoken without official recognition.
Gibraltar is a British overseas territory whose sole official language is English. Given Gibraltar's size, most of the population is also fluent in Spanish due to its vicinity with Spain. Gibraltarians also use Llanito as a local vernacular.
Portugal although Portuguese is practically universal, Mirandese, a related Leonese language, is spoken in Miranda do Douro, northeastern Portugal and is officially recognized (see: Languages of Portugal), and there is some familiarity with the Spanish language in towns bordering Spain.
Spain, where several autonomous communities have their own official language, additional to Spanish (also known as Castilian), official all over Spain (see: languages of Spain):
Basque Country and Northern Navarre: Basque, a language isolate.
Balearic Islands and Valencian Community: Catalan (officially called Valencian in Valencia).
Catalonia: Catalan and Aranese (Occitan).
Galicia: Galician, has a common origin with the Portuguese.
There are a number of languages which have official recognition of some kind but which are not fully official:
Aragonese and Catalan in certain areas of Aragon.
Asturian and, in some areas, Galician in Asturias.
Leonese and, to a smaller degree, Galician in Castile and León.

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=== Western Europe ===
Belgium has three official languages: Dutch (59%) in the north, French (40%) in the south and a small minority speaks German (1%). Its bilingual capital, Brussels is mainly French-speaking, with Dutch speakers as a minority. These languages have the status of 'official language' only in specified language areas as defined by the constitution. In Flanders, 59% and 53% of the Flemings know French and English respectively; in Wallonia, only 19% and 17% know Dutch or English. In each region, Belgium's third official language, German, is notably less known than Dutch, French or English. Wallonia recognises all of its vernacular dialect groups as regional languages, Flanders does not.
France has a monolingual policy for the republic to conduct government business only in French. There are, however, levels of fluency in regional languages: Alsatian, Basque (the department of Pyrénées-Atlantiques), Breton (the regional government of Brittany has adopted some policies to promote the teaching of Breton), Catalan (the department of Pyrénées-Orientales has a particular charter for supporting Catalan), Corsican (Corsican teaching in the island's schools is provided for by law), Flemish, Franco-Provençal, Lorraine Franconian and Occitan (sometimes called Provençal). The country as whole is linguistically dominated by French.
Ireland, the first official language of Ireland is Irish, with the second being English. English is the first language of the vast majority of the population.
Luxembourg is a rare example of a truly trilingual society, in that it not only has three official languages Luxembourgish, French and German but has a trilingual education system. For the first four years of school, Luxembourgish is the medium of instruction, before giving way to German, which in turn gives way to French. (In addition, children learn English and sometimes another European language, usually Spanish or Italian.) Similarly in the country's parliament, debates are conducted in Luxembourgish, draft legislation is drafted in German, while the statute laws are in French. Due to the large population of Portuguese descent, the Portuguese language is fairly prevalent in Luxembourg, though it remains limited to the relationships inside this community. Portuguese has no official status, but the administration sometimes makes certain informative documents available in Portuguese.
The Netherlands has four official languages. Dutch is the primary language, and West Frisian is recognized as a minority language and spoken by between 300,000 and 700,000 people. West Frisian is mostly spoken in the province of Friesland, where it is the official first language. Low Saxon is recognized as a regional language in the northeast of the country, and Limburgish is an official regional language in Netherlands Limburg. In Amsterdam, certain services are provided in English; English is official in the Dutch municipalities of Saba and Sint Eustatius. The fourth official language is Papiamento, spoken on Bonaire.
The only national language of the United Kingdom is English, however, there are several regional languages recognised to varying degrees in the UK or the Crown dependencies:
England: Cornish is currently recognised under the European Charter for Regional or Minority Languages. 557 people, mainly living in Cornwall, reported as speaking Cornish in 2011.
Wales: 611,000 Welsh speakers (but no monoglots), including the majority of the population in parts of north and west Wales. English is widely used. English and Welsh have equal official status in law. On road signs and branding of devolved organisations, Welsh is usually placed first above English. Prior to 2016, local authorities could decide whether Welsh or English should be first on road signage, leading to different orders of the languages between English-speaking and Welsh-speaking authorities, since 2016, new signage must be Welsh-first, remaining English-first signage and road paintings would become Welsh-first when they would've otherwise been replaced.
Northern Ireland: Ulster Scots, a variety of Scots, is spoken by some in Northern Ireland, but again English is far more commonly used and Ulster Scots is less actively used in media. Irish and Ulster Scots now both have official status in Northern Ireland as part of the 1998 Belfast Agreement; certain functions are granted to those two languages under the European Charter for Regional or Minority Languages.
Scotland: 58,652 Gaelic speakers, mostly concentrated in the Highlands and the Hebrides, the traditional heartland of Gaelic culture. The Gaelic Language (Scotland) Act 2005 provides for the status of the Gaelic language as an official language of Scotland commanding equal respect to the English language. Also Scots with approximately 2 to 3 million speakers a Germanic language closely related to English.
Jersey: along with English, the use of French for petitioning the parliament is provided for by its Standing Orders. Jèrriais is official as well.
Isle of Man: the main language is English, but a small percentage of the population have some knowledge of Manx Gaelic, which is used officially to a limited extent, e.g. in bilingual street signs, some official documents and for ceremonial purposes.
Guernsey: the main language is English. French is spoken as well.

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== Oceania ==
Australia English is the de facto official language of Australia. Auslan is recognised by the Australian Government and is spoken by many Australian deaf people. Australian Aboriginal languages, of which there are approximately 290363, have recognition though only a few are popularly spoken by Australian Indigenous people, including: Wiradjuri, Pitjantjatjara, Kalaw Lagaw Ya, Ngaanyatjarra, Warlpiri and Australian Kriol. Some government departments and agencies provide translations of documents in multiple languages for non-English speakers.
Fiji Fijian, English and Fiji Hindi (All official) Tongan and Tuvaluan are also spoken.
Kiribati Gilbertese and English (official); Gilbertese is the majority language, English language is the prevailing language for constitutional text
Marshall Islands Marshallese and English (both official)
Micronesia English (official) but each state has its own regional language: Chuukese (Chuuk), Kosraean (Kosrae), Pohnpeian (Pohnpei), and Yapese (Yap). In addition other language such as Pingelapese, Ngatikese, Satawalese, Puluwatese, Mortlockese, Mokilese, Ulithian, Woleaian, Nukuoro, and Kapingamarangi are recognized.
Nauru Nauruan is the official language. English is also spoken along with it.
New Caledonia, a special collectivity of France French and Kanak languages (primarily Drehu, Nengone, Paicî, Ajië and Xârâcùù)
New Zealand a small percentage of the population has some reasonable degree of bilingualism in English and Māori, mostly among the Māori themselves; few are fully fluent in Māori. New Zealand Sign Language has also an official status. English is the main language, with over 96% of the population speaking it fluently. Maori has been recognized as official since 1987.
Cook Islands Cook Islands Maori and English.
Niue Niuean and English.
Palau Palauan traditional languages are the national languages. Palauan and English are the official languages.
Papua New Guinea Tok Pisin (official), English (official), Hiri Motu (official), Papua New Guinea Sign Language (official) and some 836 indigenous languages spoken are spoken
Rapa Nui (Easter Island) Rapa Nui along with Chilean Spanish are the 2 co-official languages of the island.
Samoa Samoan and English
Tonga Tongan and English (both official)
Tuvalu Tuvaluan and English (both official)
Vanuatu the national language is Bislama, a creole language or pidgin English and French, which is also an official language alongside English and French. There are also over 110 local vernacular languages distinct to this island archipelago.
== References ==

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=== North America ===
Canada is officially bilingual under the Official Languages Act and the Constitution of Canada that require the federal government to deliver services in both official languages: English and French. As well, minority language rights are guaranteed where numbers warrant. 56.9% of the population speak English as their first language while 22.9% are native speakers of French. The remaining population belong to some of Canada's many immigrant populations or to the indigenous population. See Bilingualism in Canada
Alberta has a specific French policy since 2017. The Canadian province of British Columbia has a sizable population that speaks Mandarin or Cantonese, particularly in the city of Vancouver and its satellite town of Richmond. There is a provincial law on First Nations languages. The Canadian province of New Brunswick, with a large Acadian population (33% French-speaking) is officially bilingual. The Canadian province of Quebec, (7.9% English-speaking) Note: Quebec's largest city, Montreal, is a multilingual city with half the population having French as their mother tongue, and the other half having other languages (including English) as their mother tongue (see Language demographics of Quebec). A majority of Montrealers, whether they call themselves francophone, anglophone or allophone, know both French and English. The city's McGill University, an English-language institution, allows students to submit essays or tests in either English or French. Although there is a sizable English-speaking population in Quebec, French is the only official language of the provincial government. At the same time, many services are provided in English, such as health services, education, legislative activities and judiciary services. Many government services are available in English and French. In the Kahnawake reserve, Mohawk is the official language. Manitoba has a particular French Language Services Policy and bilingual in capital city Winnipeg, as well as a special law on recognition of seven indigenous languages. Nova Scotia has a governmental agency for Scots Gaelic language and culture affairs. French is regionally spoken, with a special law on French-language services. In Newfoundland and Labrador, in the autonomous area of Nunatsiavut, English and Inuttut are co-official There is also a particular provincial French Language Services Policy In Port au Port Peninsula French language is used as well. Nunavut is a Canadian territory with a population that is 85% Inuit. According to Official Languages Act, its official languages are Inuit, English and French. Northwest Territories have Chipewyan, Cree, English, French, Gwichin, Inuinnaqtun, Inuktitut, Inuvialuktun, North Slavey, South Slavey and Tłı̨chǫ Yatıì as the official languages. Ontario delivers services under the French Language Services Act. In Prince Edward Island, there is a Francophone region. Saskatchewan has a particular French-language Services Policy. Yukon allows the use of Yukon languages in its legislative assembly, along with French and English. In the 2006 Canadian census, information and questions are available in sixty-two languages, including eighteen First Nations languages. The city of Toronto is one of the most multilingual cities in the world. It is the home to over a dozen daily media outlets of different languages, including the Italian daily Corriere Canadese and the Chinese daily Sing Tao. Greenland: Greenlandic is the official language. Danish and English are spoken and taught; and all Greenlanders are Danish-Greenlandic bilinguals. Mexico: The government recognizes 62 indigenous languages, including Nahuatl, spoken by more than 1.5 million people and Aguacatec spoken by 27 people, along with Spanish. Indigenous languages are recognised as national languages in areas where they are spoken. There is no official language at the federal level, although Spanish is the de facto state language. In Guerrero, state constitution provides for use of indigenous languages in education and translating of main provincial laws to these languages. In Yucatán, Yucatec Maya language is recognised in the state constitution. In Oaxaca state constitution, 15 indigenous communities are listed. Certain use of their languages in education and court proceedings is provided for. In Puebla state constitution, use of indigenous languages in courts and education is provided for
In Campeche state constitution, use of indigenous languages in courts and teaching them in schools are provided for. In Quintana Roo state constitution, use of indigenous languages in courts and education is provided for; also, the laws are to be published in Maya language. In Chihuahua state constitution, use of indigenous languages in courts, education, health care and government-disseminated information is provided for. In Chiapas state constitution, use of indigenous languages in courts and education is provided for. In the United States, at the federal level, there is no official language, although there have been efforts to make English the official language. Use of several languages in electoral process under certain circumstances is provided for by federal law, including Spanish in the whole states of Florida, California and Texas. There are federal statutes promoting Native American languages: Native American Languages Act of 1990 and Esther Martinez Native American Languages Preservation Act. The US state of California has the Dymally-Alatorre Bilingual Services Act. requiring state and local agencies serving a "substantial number of non-English speaking people" to employ a "qualified bilingual staff" and to translate certain documents into clients' languages. The US state of New Mexico provides certain guarantees for the use of Spanish, alongside English, in its constitution and electoral laws. Its state laws also provide for using Spanish and Native American languages in education
The US state of New York provides translation of vital documents and interpretation into six languages alongside English. The US state of South Dakota recognises the Sioux language as the official indigenous language of the state. The US state of Texas provides in its law for translating to Spanish certain information on agency websites. The US state of Louisiana has mandated the Louisiana French Language Services Program and the Department of Culture, Recreation and Tourism to work on providing state government services in French, to the extent practicable It also expressly allows the use of French in legal process and publishing official documents. Spanish is also spoken. The Saint John River valley in the US state of Maine and some areas in Vermont are unofficially bilingual (de facto) in English and French. The US state of Hawaii is officially bilingual in English and Hawaiian. The US state of Alaska officially recognizes English and the following twenty Alaska Native languages: Inupiaq, Siberian Yupik, Central Alaskan Yup'ik, Alutiiq, Unanga, Dena'ina, Deg Xinag, Holikachuk, Koyukon, Upper Kuskokwim, Gwich'in, Tanana, Upper Tanana, Tanacross, Hän, Ahtna, Eyak, Tlingit, Haida, Tsimshian languages. Russian is spoken. Three US territories are also bilingual: American Samoa (Samoan and English), and Puerto Rico (Spanish and English). Guam Code provides for bilingual education (English and Chamorro). One US territory is trilingual: Northern Marianas Islands (English, Chamorro, and Carolinian). In US, states with a large historic (New Spain and First Mexican Empire) and recently arrived Spanish-speaking population such as California, Nevada, Arizona, Colorado, New Mexico, Texas and Florida will often provide government services at the municipal level in Spanish as well as English. For example, in Florida, Hialeah recognizes both English and Spanish while Miami recognizes English and Spanish as official government languages. Hopi Tribe constitution (Arizona) provides for specific requirements for Hopi language skills for officials
German is spoken due to Amish, German, Austrian and Swiss people.

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In Pennsylvania, the Pennsylvania Dutch dialect is spoken.

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=== South America ===
Argentina has several ethnic communities of European, Asian and indigenous origins (the Andean and northeast regions), who speak their own languages, but uses de facto Spanish as the official language of the country. In most of the country, there is a sizable but bilingual Italian-speaking population.
Chaco Province recognises Qom, Moqoit y Wichi as official languages of the province along with Spanish
Corrientes Province Guarani is recognised as the second official language
Santiago del Estero Province gives official recognition to Quechua in its constitution
Bolivia is officially multilingual, supporting Spanish and 36 native languages.
Brazil, Portuguese (official) and upwards to 100 languages spoken mainly in the urban areas (European and Asian) and indigenous languages in the Amazon. The use of indigenous languages in primary education is enshrined in the constitution.
Espírito Santo German and East Pomeranian are recognized by constitution as part of the state's cultural heritage
Rio de Janeiro Yoruba, Bantu and Jeje (African Languages) are recognized by constitution as part of the state's cultural heritage
Rio Grande do Sul Talian (Italian dialect) and Riograndense Hünsrick (German dialect) are recognized by constitution as part of the state's cultural heritage
Santa Catarina Talian are recognized by constitution as part of the state's cultural heritage
Chile uses de facto Spanish as official language, but there are not an act that declares officiality. The Indigenous Act ratified in 1992 permites the official usage of four indigenous languages: Aimara, Mapudungun, Quechua and Rapa Nui (Easter Island in Polynesia) inside the indigenous communities and areas with high native population density. In the southern portion, there is a sizable but bilingual German-speaking population.
Colombia The official language is Spanish. Languages of ethnic groups are official in their territories. English is co-official in San Andres and Providencia.
Ecuador defines Spanish as its official language, but Spanish, Quechua and Shuar as official languages of intercultural relations in the Article 2 of the 2008 Constitution.
Falkland Islands, English is the official & dominant language. Spanish is spoken by a minority of the population who comes from Chile and Argentina.
Guyana, English (official), Guyanese Hindustani (now mostly used among elders only from Indo-Guyanese community), Chinese, indigenous languages, and a small Portuguese-speaking community. The Amerindian Act orders the National Toshaos Council to promote the recognition and use of Amerindian languages.
Paraguay, More than 46% of its population is bilingual in Guaraní and Spanish (both official languages of the Republic), of whom 37% speak only Guaraní and 8% only Spanish but the latter increases with the use of Jopará. There is a large Mennonite German colony in the Gran Chaco region as well.
Peru's official languages are Spanish and, in the zones where they are predominant, Quechua, Aymara, and other aboriginal languages. In addition to that, in Peru there is a large community of immigrants, of which few keep their languages. Within those, there are the Japanese and the Chinese (Cantonese dialect), for example and in smaller numbers, the Germans (central Andes), Italian, the Arabic speakers, and the Urdu speakers retain their native languages in Peru. The last two are products of the recent wave of immigrants from Palestine and Pakistan. Lately English has been used by American and British residents.
In Suriname, Dutch, Sranan, and English are spoken by large segments of the population (as the national, de facto working language, and common educational language, respectively). In addition, Chinese, Javanese, and various Indian languages, such as Hindustani, are spoken as well.
Uruguay has a large Italian-speaking minority also proficient in Spanish. Its border with Brazil has a mixed Portuguese-speaking presence.
Venezuela has declared Spanish the official language, while there are some European and Arabic languages spoken in urban areas, Caribbean English dialects in the Caribbean and indigenous languages spoken in the Guayana department. The prominent additional European languages spoken are Italian and German. The use of native languages also has official status for native peoples.
== Asia ==
=== Central Asia ===
Kazakhstan: Kazakh and Russian both have official status—Kazakh as the "state" language and Russian as "officially used on equal grounds along with the Kazakh language". Kazakhstan is taking its huge step into multilingualism by accepting the trilingualism policy and making changes in law. Former president Nursultan Nazarbaev noted that "The multinationality and multilingualism are one of the values and the main feature of our state. "Dariga Nazarbayeva, then deputy prime minister and daughter of the then president, said in February 2016 that Kazakh children should learn Chinese in addition to Kazakh, Russian and English. “China is our friend, our trading partner and the biggest investor in the economy of our country", she said. "In the near future, we all need to know Chinese.”
Kyrgyzstan: Kyrgyz is the state language and Russian "used in the capacity of an official language".
Tajikistan: Tajik as the state language and Russian, designated as language of interethnic communication in the constitution, are widely spoken.
Uzbekistan: In Uzbekistan, Uzbek (official), Tajik, and Russian are all widely spoken. Use of Russian (alongside Uzbek) is foreseen for notarized documents and civic records
Karakalpakstan: In Karakalpakstan, Karakalpak is an official one, alongside Uzbek.

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=== East Asia ===
In Mainland China, Standard Mandarin (Putonghua) is the official language and is spoken in all regions. It is used for official and formal purposes, by the media, and in education as the language of instruction. However, on money notes, there are texts both in Mandarin (Han) and in Mongolian, Tibetan, Uyghur, and Zhuang. In every locality and region, local varieties of Chinese are spoken in daily life. These range from being quite similar to Putonghua, such as Tianjin dialect, to those that are mutually unintelligible with Putonghua such as Jiangsu, Zhejiang and Shanghai dialect (Wu) or Guangzhou dialect (Cantonese). In the autonomous regions, minority languages are used (such as Tibetan in Tibet or Mongolian in Inner Mongolia, Uyghur, Kazakh and others in Xinjiang).
Japan: a special law provides for promotion of Ainu in Hokkaido
Taiwan: A national language in Taiwan is legally defined as "a natural language used by an original people group of Taiwan and the Taiwan Sign Language". This includes Formosan languages, Hakka, Mandarin and Taiwanese.
In Hong Kong, English and Chinese are official languages. All road signs are written in both languages. English is the dominant language in the judiciary and in higher education. Hong Kong Cantonese is the first language of the majority of the population, and is the dominant language in many aspects of everyday life. While Cantonese is the widely spoken form of Chinese in Hong Kong, Standard Mandarin is also taught in schools. The degrees of proficiency in English and Mandarin vary from person to person.
In Macau, both Chinese and Portuguese are official languages. While Cantonese is the dominant form of Chinese, Standard Mandarin (Putonghua) is also spoken. Chinese is taught in all schools, while Portuguese is mainly taught in government schools. In addition, English is also taught in many schools. Macanese Patois, a local Portuguese-based creole generally known as Patuá, is now spoken only by a few older Eurasian population.
=== North Asia ===
Russia holds a List of minor indigenous peoples of Russia. This list currently mentions 50 peoples (40 until an amendment in 2015), and the "Law on the guarantees of the rights of the minor indigenous peoples of Russia" guarantees among other Federal programmes for the protection and development of their languages and cultures (article 5). The article 10 of the same law guarantees to people belonging to these peoples the right to preserve and develop their native language, and the right to receive and broadcast information in their native languages and to create media.
Several Republics of Russia make locally official the language of the main people(s) of those Republics:
Buryatia Russian and Buryat are co-official
Altai Republic Russian and Altai are co-official
Tuva Russian and Tuvan are co-official
Khakassia Russian and Khakas are co-official
Sakha Republic Russian and Sakha are co-official. The law "about the languages of the Sakha Republic" mentions in its article 6 that Evenki, Even, Yukagir, Dolgan, Chukchi languages are recognized as official in the places where those peoples live and are used as equal as the national languages. The Sakha Republic guarantees protection and care for the preservation and the free development of those languages. It is worth noting, however, that Chukchi has no official status in the neighbouring Chukotka. It is closely related to Koryak which is official in the North of Kamchatka (see below).
Administrative-territorial units with special status (formerly Federal subjects of Russia, downgraded in 20072008):
Ust-Orda Buryat Okrug (Irkutsk Oblast) and Agin-Buryat Okrug (Zabaykalsky Krai): Buryat is co-official with Russian.
Koryak Okrug (Kamchatka Krai): Koryak is co-official with Russian.
=== South Asia ===

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Afghanistan: Pashto and Dari (Afghan Persian) are the official and most widely spoken languages in Afghanistan, with the former serving as a national language and the latter spoken as a lingua franca. Other minor languages include Uzbek and Turkmen, Balochi and Pashayi, Nuristani (Askunu, Kamkata-viri, Vasi-vari, Tregami and Kalasha-ala), Pamiri (Shughni, Munji, Ishkashimi and Wakhi), Brahui, Hindko, Kyrgyz.
Bangladesh: Noidien Bengali is the official and most widely spoken language. However, there are many local languages (some of which are considered Bengali dialects, like Seletino, Nueklikos and Chetgonien) spoken in different regions of Bangladesh, as well as minority languages. Speakers of these languages are often bilingual in their local language and Standard Bangla. Additionally, the use of English is widespread in education and the judiciary in the country. In the CHT region, tribal languages like Genmanoos, Mouge/Reccen, Cucbarooco, Meru, Tensankês, Bomsche/Bomiano, Shö, Xumi, Sac, Penkaans, Lušei/Mizo, et cetera are spoken. Chetgonien and Nodien Bengali are the main dialects spoken in lower Chittagong. Chetgonien has a noticeable influence from Portuguese due to the historical presence of Portuguese traders and settlers in the area, which is much more pronounced in Chetgonien Bengali than Nodien Bengali. Chetgonien, as well as Seletino and other Bengali dialects have loanwords from a large number of foreign tongues, most notably Portuguese, Farsi/Persian, Arabic, Hindustani, Turkish and English, adding to the language's rich vocabulalry. In the Brampüter floodplain, languages like Cochense/Köch, Rajbągczyk, and Gerano are spoken. In the Eastern Baroque Valley, alongside Noidien Bengali and Seletino, Pnar, Micreesh, Kasee, Metois, Serimje, Reccüle, Reloch, Coıreğçâ and Secachfa are spoken. Gutte/Cutte Bengali, Urdu, and other forms of Hindustani are spoken in Dacca alongside Nodien/Standard Bengali. Sentale, Cursh, Oriense, Mentaoren, Ekristian alongside Renporee and Nodien Bengali are among the languages spoken in the north-western divisions. The nomadic River Gypsies speak Thet. Bagdi and Bindi languages are spoken in the south-western divisions as well as local Bengali dialects and other tribal languages. Numerous other languages like Rohingya Bengali, Ganju, Kanda, Bhumij, Baraik, Nepali, Bhojpuri et cetera are also spoken, as well as immigrant and liturgical languages like Chinese, French, Spanish, Arabic, Latin, Greek, Aramaic and Ebrogh. Languages like Armenian, Chinese, Greek and Persian were previously spoken at-home by certain communities, mostly traders, but have gone extinct.
India: There are 22 official languages in the states and territories of India (Including Hindi and English, the languages with official use by the Union Government). The largest, Hindi, is spoken natively by 26% of the population. English is also used, although mainly in some urban parts of the country. A large number of students with a high-school education would generally be trilingual speaking their own native language, in addition to Hindi and English, with varying fluency—because of the nation's long-standing three language formula that encourages students to learn English and another Indian language as second- and third-languages.
Nepal: The 2011 Nepal census reports 123 Nepalese languages spoken as a mother tongue. Most belong to the Indo-Aryan and Sino-Tibetan language families. These are considered to be national languages, and according to the Constitution of Nepal 2015 they are official in their own regions. Despite this, Nepali was selected as the sole working language for the Nepali government.
Pakistan. The national language is English and Urdu; English was to be replaced by Urdu however this has not occurred despite many attempts in the past to do so. Pakistan is unique in that both English and Urdu are non-native languages and nearly all Pakistani's need to learn them as a second and/or a third language. There are many regional languages and dialects (the latter are often unintelligible from other dialects of the "same language"). Many high-school and college educated Pakistanis are trilingual, being able to speak English and Urdu as well as their own regional language with varying fluency.
Sri Lanka. Sinhala and Tamil are official languages. English is referred to as the link language in the constitution.

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=== Southeast Asia ===
Brunei: Malay (official) and English
Cambodia: Khmer is the official language, but French is spoken by a minority and sometimes used in government and education. Mandarin is spoken in business and commerce.
East Timor Tetum and Portuguese are the official languages; English and Indonesian "shall be working languages within the public administration side by side with official languages as long as it is deemed necessary"
Indonesia is the largest bilingual country in the world, with approximately 200 million people speak more than one language. Indonesians speak about 746 different languages. Javanese has the most users in terms of native speakers (about 80 million). However, the sole official (or so-called "unity language") is Indonesian which has only 30 million L1 speakers (compared to Indonesia 260 million population). The role of Indonesian is important to glue together different ethnics and languages in Indonesia. Though Indonesian is considered the nation's only official language, regional governments have rights to conduct regional languages study at schools. Many people in Indonesia are bilingual at an early age. They speak a local native language with their families whereas the official Indonesian language is used to communicate with people from other regions and is taught in schools as a compulsory subject.
In Laos, Lao is the official language; however, French is understood and used by government.
In Malaysia, nearly all people have a working knowledge of Malay and English. Malay is the official language of the country, along with English in the state of Sarawak. Malay and English are compulsory subjects taught in all public schools. Chinese (Mandarin) and Tamil are spoken by the Chinese and Indian communities respectively, and are the languages of instruction in Chinese and Tamil primary schools respectively. Among the Chinese community, apart from Mandarin, several Chinese languages especially Hakka, Hokkien, Cantonese and Teochew and among Indians, Tamil is the most spoken and dominant language. The indigenous peoples of Sabah and Sarawak speak their ancestral languages (Dayak, Iban etc.). However, it is not uncommon for the locals to be fluent in several of the above languages. The Constitution provides for use of Sabah and Sarawak languages in native courts or for any code of native law and custom.
Philippines: The Philippine constitution designates Filipino as the national language and, along with English, as official languages. Regional languages are designated as auxiliary official languages in the regions which shall serve as auxiliary media of instruction therein. Spanish and Arabic are designated to be promoted on a voluntary and optional basis. Some people in native Tagalog areas are bilingual, while in non-Tagalog areas it is common to be multilingual in Filipino, English, and in one or more of the regional languages, or as in other cases in languages such as Spanish, Fukien (Hokkien), and Arabic due to factors such as ancestry and religion. Eleven regional languages are recognised by the government as auxiliary official languages in their respective regions, while 90+ other languages and dialects are spoken by various groups.
Singapore: English, Mandarin Chinese, Malay and Tamil are all official languages. Malay is the national language. English is the main language used in Singapore. As English links the different races and ethnic groups, a group with diverse races and ethnicities communicate using English. Most of the population can speak, read and write in English. In addition to English, many Singaporeans can speak their respective ethnic language like Mandarin Chinese fairly well, as it is a compulsory subject in school. In Chinese communities, the older generation usually speak their own language like Hakka and Hokkien besides Mandarin and/or English.
Thailand: Thai is the main and sole official language in Thailand. There are different dialects such as Phitsanulok, Ayutthaya, Suphan Buri (traditional dialect), Thonburi, but Standard Thai is influenced by Thai Chinese in Bangkok, Isan which is influenced from Lao and widely used in the northeastern area, Southern Thai is spoken in the southern provinces, Northern Thai is spoken in the provinces that were formerly part of the independent kingdom of Lanna. Karen languages are spoken along the border with Burma, Khmer near Cambodia (and previously throughout central Thailand), and Malay in the south near Malaysia. The Thai hill tribes speak numerous small languages. Also, there is a big population of Chinese descent people in Thailand and the old generation often use Teochew as well as Hakka as their first language. The new generation tends to speak them as a second language or some may not know it at all.
Vietnam: Vietnamese is the official language, and English is the most commonly used and studied second language, especially in education, international relations, and the media. In addition, French is spoken by a small minority of people and elders as it used to be the most common second language. The right to use own language, also in courts, is foreseen in the constitution.

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=== Western Asia ===
Bahrain: Arabic is the official language, and English is the most commonly used and studied second language, especially in education, international relations, and the media. In addition, Persian and Urdu are widely spoken.
Cyprus has two official languages: Greek and Turkish. Both languages were spoken throughout the island before 1974. After 1974, and the partition of the island, Turkish became the sole official language in the Turkish-Cypriot-controlled north whereas the internationally recognized Republic of Cyprus retains both languages as official. English is also widely spoken and understood throughout the island. Armenian and Arabic are the two official minority language.
In Iran, Persian is the only official language, but Azerbaijani (along with related varieties such as Qashqa'i and Kalaj) has upwards of 20 million speakers. Other minority languages include Kurdish, Turkmen, and Balochi. Assyrian is spoken by a Christian minority in the vicinity of Urmia. In the southwestern Iranian province of Khuzestan, most people speak Khuzestani Persian, Khuzestani Arabic, and Standard Persian, sometimes in addition to their own community languages such as Lur, Qashqa'i, Domari or Mandaic where applicable. None of the non-Persian languages are taught at schools.
In Iraq, Arabic is the official language of the state, Kurdish is the official language of the north where 4 million native speakers live. The use of Turkmen, Assyrian, and Armenian in education is provided for in the Constitution. Other languages also exist among Christian communities north of and around Baghdad, such as Aramaic. English is used as well.
In Israel, Hebrew has the official status of the state's language and Arabic a special status with protection of its pre-2018 functions (see Languages of Israel). Jewish immigrants to Israel (especially from Europe) have a different mother tongue, such as Arabic, Amharic, Yiddish, Ladino, Russian, Romanian, Polish, Ukrainian, English, or French and many Jewish immigrants from Latin America speak Spanish and Portuguese. The Arab population of Israel speaks Arabic. Functionally, almost all Arabs in Israel also speak Hebrew. English is widely spoken and understood as a second language by both Arabs and Jews. Officially, road signs must be in Hebrew, Arabic, and a romanized Hebrew transliteration.
In Lebanon, Arabic is the official and national language; the Constitution provides for the conditions of using French to be provided by law. Many Lebanese are fluent in French and in English. Armenian is also a language mainly used in the Armenian community.
Arabic is the official language of Palestine, and Palestinian Arabic is the dominant dialect spoken by most of the population. The dialect is distinct but shares features with Levantine Arabic spoken in Jordan, Syria, and Lebanon. Classical Arabic is used in religious contexts, media, and formal communication. Hebrew is spoken in certain areas, particularly where illegal Israeli settlements exist, and some Palestinians are bilingual in Arabic and Hebrew due to proximity to Israeli businesses and workplaces. English is widely taught in schools and used in higher education, diplomacy, and international communication. Several minority languages exist: French is spoken by parts of the population due to historical ties and education systems influenced by French institutions. Armenian is present within the Armenian community, primarily in Jerusalem and Bethlehem, where Armenian churches and schools exist. Domari, the language of Romani groups, is spoken by the Dom community, an often overlooked ethnic group within Palestine. There is also a deep linguistic connection to historical Palestine, where Aramaic was once widely spoken before Arabic became dominant. Some Christian communities still preserve liturgical Aramaic, keeping its legacy alive in religious texts and rituals.
In Qatar, Arabic is the official language, and English is common language.
Syria:
Arabic is the official language, English is taught as a second language in schools starting from first grade, and in middle school you get to choose between French and Russian as a third language.
Rojava: the constitution of the de facto autonomous region designates Kurdish, Arabic and Syriac as official languages.
In Turkey, the Constitution of Turkey defines Turkish as the only official language of the country (art. 3) and explicitly prohibits educational institutions to teach any language other than Turkish as a mother tongue to Turkish citizens (art. 42). Only exception is Greek and Armenian languages, which can be taught in schools as part of non-Muslim minorities rights of Treaty of Lausanne. In 2013, the Ministry of Education introduced Kurdish, Abkhaz, Adyghe and Laz languages into the academic programme of the basic schools as optional classes from the fifth year on. In 2010, Kurdish municipalities in the southeast decided to begin printing water bills, marriage certificates and construction and road signs, as well as emergency, social and cultural notices, in Kurdish alongside Turkish. Friday sermons by imams began to be delivered in the language, and Esnaf provided Kurdish price tags. Before August 2002, the Turkish government placed severe restrictions on the use of Kurdish, prohibiting the language in education and broadcast media. In March 2006, Turkey allowed private television channels to broadcast in Kurdish. However, the Turkish government said that they must avoid showing children's cartoons, or educational programs that teach Kurdish, and could broadcast only for 45 minutes a day or four hours a week. However, most of these restrictions on private Kurdish television channels were relaxed in September 2009.
United Arab Emirates: Arabic is the official language of the country, although English is an unofficial language it is widely accepted as the lingua franca as over 89% of the population is migrant. Almost everyone has a working knowledge of English. All road signs are written in both Arabic and English. English is dominant in higher education and is a required ability for most local jobs. English is a compulsory subject in all public schools and is the language of instruction for mathematics and science.
== Europe ==

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=== Central Europe ===
Austria has one official language: German. However, it also has Croatian and Slovenian minorities, all of whose languages are protected under federal laws. Certain functions are also guaranteed for Romany, Hungarian, Czech and Slovak in Vienna and Burgenland, under the European Charter for Regional or Minority Languages.
In the Czech Republic, several municipalities of Trans-Olza area have official bilingualism (Czech and Polish). Bilingual signs are permitted if a minority constitutes at least a 10% of the population of the municipality. German is recognized as a minority language because of the previous visible German presence in Bohemia.
Germany has German as its official national language. Low German is recognized as a regional language in at least five north German states. Lower Sorbian is an official minority language in Brandenburg, Upper Sorbian in Saxony, Sater Frisian in a part of Lower Saxony, and North Frisian varieties and Danish in Schleswig-Holstein. A language without its own territory, Romany (including the language of the Sinte people) is an official minority language as well. Germany is home to large numbers of people from other regions, and some of their languages, such as Turkish, Russian, and Polish, are widely used throughout the country. However, those languages are considered foreign and thus are given no official status.
Hungary, the official language is Hungarian. The country recognizes Beás, Croatian, German, Romani, Romanian, Bosnian, Serbian, Slovak, Slovene languages. Use of those languages for certain functions is provided for by law, applying to localities where the share of a relevant minority exceeds 10% or, for wider functions, 20%.
Poland 20 bilingual communes in Poland (mostly Polish-German) speak forms of the German language. Belarusian, Czech, Hebrew, Yiddish, Lithuanian, German, Armenian, Russian, Slovak, and Ukrainian are recognised as national minorities languages while Karaim, Lemko, Romani, and Tatar as ethnic minorities languages.
Slovakia has a Hungarian minority of 520,000 (9.7%). Bulgarian, Croatian, Czech, German, Bosnian, Serbian, Hungarian, Polish, Roma, Russian, Ruthenian, and Ukrainian languages are recognized as regional or minority languages, with guarantees of their use in municipalities where Slovak citizens belonging to the national minorities form at least 20% of the population.
Switzerland has four national languages; German, French, Italian, and Romansh. The cantons Valais, Fribourg and Bern are bilingual (French and German), while canton Graubünden is trilingual (German, Romansh, and Italian). Most Swiss nowadays learn English to communicate to Swiss speaking other native languages, as English is neutral among speakers of different national languages, making it a lingua franca, with no one national language dominating the other.
=== Eastern Europe ===
Ex-Soviet republics and Warsaw Pact countries: Many people speak Russian fluently, especially in Slavic countries within the area of the former USSR (typically in Belarus and Ukraine), along with Moldova, which has a Slavic minority. However, few Polish, Slovak or Czech people speak Russian, despite huge expenditures in the past.
Abkhazia. According to Georgian law, Georgian and Abkhazian are co-official; according to Abkhazian law Abkhazian and Russian. The elder generation of Abkhazis spoke Georgian, Russian and Abkhazi.
Belarus has two official languages: Belarusian and Russian.
Estonia has one official language, Estonian, but there is also a sizeable Russian-speaking community (around 30% in 2000) who speak Russian. Russian and other minority languages can theoretically be used in communication with local government and state institutions within the borders of certain constituencies where most permanent residents belong to a respective national minority (Article 51 of the Constitution). Only citizens of Estonia are considered to belong to national minorities; thus, the provision is only applicable in three parishes and two towns. Many Estonians can speak Russian, but many Russians are not fluent in Estonian including those who are Estonian citizens, however fluency varies considerably between age groups.
Latvia has one official language, Latvian. The Livonian language is recognized as autochthonous (in the Livonian coast, it is allowed to form toponyms in Livonian alongside Latvian); the others are defined as "foreign" in the Official Language Law, but there is also a sizeable minority with Russian as their native language 37.3% of those answering the question on language used at home named Russian in the 2011 census.
Lithuania has one official language, Lithuanian. The largest minorities in Lithuania are both Slavic-speaking: Russian and Polish. The latter are a majority in Šalčininkai district municipality.
Republics of Russia (see also North Asia for other languages of Russia):
Adygea Russian and Adyghe are co-official
Bashkortostan Russian and Bashkir are co-official
Dagestan Russian and 13 languages are co-official. The Constitution does not state the list of the languages but instead mentions that the languages of the peoples of Dagestan are official. The commonly used list of 13 languages can be derived for example from the languages in which the regional public Radio and Television company broadcasts programmes: Since 2017, The Atlas of multilingualism of Dagestan has become available online.
Ingushetia Russian and Ingush are co-official
Kabardino-Balkaria Russian, Kabardian, Balkar are co-official
Tatarstan Russian and Tatar are co-official
Kalmykia Russian and Kalmyk are co-official
Karachay-Cherkessia Russian (also as a language of interethnic communication), Abaza, Cherkess, Karachay and Nogai are co-official
Mari El Russian and Mari are co-official
Mordovia Russian and Mordvin are co-official
Komi Republic Russian and Komi are co-official
Karelia Russian is official, but Karelian is spoken by the ethnic Karelian minority.
North OssetiaAlania Russian and Ossetian are co-official
Udmurtia Russian and Udmurt are co-official
Chechnya Russian and Chechen are co-official
Chuvashia Russian and Chuvash are co-official
Komi-Permyak Okrug: Komi-Permyak language is official (along with Russian) in this administrative-territorial unit with special status of Perm Krai.
In Ukraine, Russian, Hungarian and Romanian were granted status of a regional language in certain areas in 201218 (Language policy in Ukraine). Carpathian Ruthenia, Ukraine, Slovaks living near Uzhhorod speak Ukrainian and Hungarian in addition to their mother tongue, Slovakian. In villages near Mukachevo Germans (Swabian dialect speakers) also speak Hungarian and Ukrainian.

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This is a list of notable people with a knowledge of six or more languages.
== Deceased ==
=== Antiquity and Middle Ages ===
Mithridates VI (13563 BC), King of Pontus. According to Pliny the Elder, Mithridates could speak the languages of all of the twenty-two nations that he ruled.
Cleopatra (6930 BC), Queen of Egypt. According to Plutarch, Cleopatra spoke many languages in addition to her native language, Greek, including Latin, Egyptian, Ethiopian, Trogodyte, and the languages of the Hebraioi, Arabes, Syrians, Medes, and Parthians.
Al-Farabi (870950), Islamic philosopher. He was reputed to know seventy languages.
Frederick II (11941250), King of Sicily and Holy Roman Emperor. He knew Sicilian, French, Latin, Greek, German, and Arabic.
=== Modern age, pre-18th century ===
Mehmed II (14321481), Sultan of the Ottoman Empire. In addition to his native language, Turkish, he learnt Arabic, Hebrew, Persian, Latin, and Greek.
Elizabeth I (15331603), Queen of England and Ireland. She is thought to have known English, Welsh, French, Spanish, Italian, Latin, Greek, and some German.
Athanasius Kircher (16021680), German Jesuit scholar. He was said to know twelve languages.
John Milton (16081674), English poet. He knew English, Italian, Latin, Greek, and Hebrew, and to a lesser extent Dutch, French, Spanish, Aramaic, and Syriac.
Wojciech Bobowski (16101675), Polish musician held captive by the Ottoman Empire. He is said to have known Polish, English, German, French, Italian, Latin, Ancient Greek, Persian, Arabic, Hebrew, and Turkish.
Alexander Mavrokordatos (c.16411709), Ottoman Greek physician and Grand Dragoman of the Porte. He knew Greek, Ottoman Turkish, Arabic, Persian, Latin, Italian, French, Old Church Slavonic, and possibly German.
Dimitrie Cantemir (16731723), Prince of Moldavia. He spoke Romanian, Italian, Latin, Modern Greek, Russian, Persian, Arabic, and Ottoman Turkish, and had an understanding of French, Ancient Greek, and Old Church Slavonic.
=== 18th century ===
Thomas Jefferson (17431826), third president of the United States. He spoke English, French, Italian, and Latin, and could read Spanish and Greek. He may also have had some knowledge of German.
William Jones (17461794), British philologist and jurist. He knew twenty-eight languages to varying degrees: English, Dutch, German, Swedish, Welsh, Russian, French, Spanish, Portuguese, Italian, Latin, Greek, Sanskrit, Pali, Hindi, Bengali, Persian, Middle Persian, Zoroastrian Dari, Arabic, Hebrew, Syriac, Geʽez, Coptic, Turkish, Chinese, Tibetan, and the various forms of early Germanic preserved in runic inscriptions.
John Oswald (c.17601793), Scottish revolutionary. He learnt Latin and Greek in his youth, and later studied French, Italian, Spanish, Portuguese, and Arabic.
Giuseppe Caspar Mezzofanti (17741849), Italian cardinal. One of his contemporaries recorded that he knew seventy-two languages to varying degrees; another calculated that he knew sixty or sixty-one. Both agreed that there were thirty languages that he had fully mastered: Italian, Spanish, Portuguese, French, Latin, English, Dutch, Flemish, German, Danish, Swedish, Russian, Polish, Czech, Illyrian, Greek, Romaic, Albanian, Ancient Armenian, Modern Armenian, Persian, Hungarian, Turkish, Hebrew, Rabbinical Hebrew, Arabic, Maltese, Aramaic, Coptic, and Chinese.
Carl Friedrich Gauss (17771855), German mathematician. He wrote in Latin and could read Greek. In addition to his native language, German, he knew a number of modern European languages. At the age of sixty-two, he began studying Russian and mastered it within two years.
Jean-François Champollion (17901832), French Egyptologist. He knew Latin, Greek, Sanskrit, Persian, Arabic, Hebrew, Aramaic, Syriac, Amharic, and Coptic.
Helmuth von Moltke the Elder (18001891), Prussian field marshal. He knew seven languages, but was habitually taciturn, so that he was said to be "silent in seven languages". Among the languages he knew were German, English, Danish, French, Italian, and Turkish.

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=== 19th century ===
William Rowan Hamilton (18051865), Irish mathematician. Encouraged by his uncle, he learnt many languages while still young, including Latin, Greek, Hindustani, Bengali, Marathi, Sanskrit, Persian, Arabic, Hebrew, Aramaic, Syriac, and Malay.
Henry Wadsworth Longfellow (18071882), American poet. He knew Latin, Italian, French, Spanish, Portuguese, and German. He also had some knowledge of Dutch, Danish, Swedish, Icelandic, and Finnish.
Jan Prosper Witkiewicz (18081839), Polish-Lithuanian explorer and diplomat. He spoke Polish, Russian, English, German, French, Persian, Pashto, Kazakh, and Chagatai Turkish.
Solomon Caesar Malan (18121894), British clergyman. He was conversant with around eighty languages, including German, Spanish, Italian, Latin, Sanskrit, Hebrew, Arabic, Chinese, and Tibetan.
Otto von Bismarck (18151898), Prussian statesman. In addition to his native language, German, he spoke English and French, and to a lesser extent Italian, Russian, Polish, and Plattdeutsch. He also had some knowledge of Latin.
Herschell Filipowski (18161872), Lithuanian-born British actuary and editor. He was conversant with Polish, Russian, German, English, French, Spanish, Latin, Hebrew, Arabic, and Chinese.
Karl Marx (18181883), German political theorist. He spoke German, English, and French, and could read Greek, Latin, Italian, Spanish, Romanian, and Russian.
C. V. Runganada Sastri (18191881), Indian civil servant. The Dictionary of Indian Biography states that he knew English, German, French, Latin, Greek, Persian, Sanskrit, Hindustani, Marathi, Tamil, Malayalam, Kannada, Telugu, Arabic, and some Hebrew. Other sources suggest he also knew Italian.
Friedrich Engels (18201895), German political theorist. He spoke German, English, Danish, French, Italian, and Spanish, and to a lesser extent Russian, Polish, and Romanian. He also studied a number of other languages, including Greek, Latin, Portuguese, Dutch, Frisian, Gothic, Irish, Czech, Slovenian, Serbian, Persian, Hebrew, Turkish, and Japanese.
Richard Francis Burton (18211890), British explorer and writer. He knew twenty-nine languages and eleven dialects, including Greek, Latin, Italian, Spanish, French, Provençal, Béarnais, Persian, Sanskrit, Hindustani, Gujarati, Punjabi, Sindhi, Marathi, Telugu, Toda, Arabic, Somali, and Swahili.
Heinrich Schliemann (18221890), German businessman and archaeologist. He knew eighteen languages, including German, Dutch, English, French, Italian, Spanish, Portuguese, and Russian.
Pedro II (18251891), last emperor of Brazil. He spoke Portuguese, Spanish, French, Italian, Latin, German, Hebrew, and Tupi-Guarani, and could read Provençal, Greek, Sanskrit, and Arabic.
Pashko Vasa (18251892), Albanian writer. He spoke Albanian, Italian, French, Greek, and Turkish. He also knew some English and Serbo-Croatian, and in his later years learnt Arabic.
Georg Sauerwein (18311904), German translator and private tutor. He spoke and wrote twenty-six languages.
Pétrus Ký (18371898), Vietnamese scholar. He spoke eight languages and had reasonable competence in several others.
James Murray (18371915), Scottish lexicographer. He was familiar with a wide range of languages and dialects, including Latin, Italian, Spanish, Portuguese, French, Catalan, Provençal, Vaudois, Anglo-Saxon, Mœso-Gothic, German, Dutch, Flemish, Danish, Russian, Persian, Sanskrit, Hebrew, Syriac, Aramaic, Phoenician, and Coptic.
Nikodim Milaš (18451915), Serbian Orthodox bishop and saint. He could read Serbian, Russian, German, English, French, Italian, Latin, and Greek.
Naim Frashëri (18461900), Albanian writer. He wrote in Albanian, Greek, Persian, and Turkish. He also knew French, Italian, and Arabic.
Sami Frashëri (18501904), Albanian writer. He knew Albanian, Greek, French, Italian, Persian, Arabic, and Turkish.
Eduardo Toda y Güell (18521941), Spanish diplomat. He spoke seven languages.
Emilio Kosterlitzky (18531928), Russian-born Mexican soldier. He spoke Russian, Polish, Spanish, French, Italian, English, German, Danish, and Swedish.
Arthur Rimbaud (18541891), French poet. He spoke and wrote five European languages: French, Italian, Spanish, English, and German. He also knew Arabic, Amharic, Harari, Oromo, and Somali, and may have had some knowledge of Argobba, Tigrinya, and a now-extinct language named Kotou.
Robert Dick Wilson (18561930), American Bible scholar. He learnt twenty-six languages and dialects, including Latin, Italian, French, Spanish, Portuguese, German, Hebrew, Aramaic, Syriac, and Arabic.
Nikola Tesla (18561943), Serbian-American inventor. He spoke eight languages, including Serbo-Croatian, English, German, French, and Italian.
Heinrich von Coudenhove-Kalergi (18591906), Austro-Hungarian diplomat. He spoke sixteen languages, including Japanese, Russian, Turkish, and Hebrew.
L. L. Zamenhof (18591917), creator of Esperanto. He spoke Russian, Polish, Yiddish, German, and French natively or at a native level. He also spoke English, but not well. He knew four classical languages, Latin, Greek, Hebrew, and Aramaic, and two constructed languages, Volapük and Esperanto, and may have had some knowledge of Italian and Lithuanian.
José Rizal (18611896), Filipino writer and nationalist. He spoke or could read Tagalog, Visayan, Ilocano, Cebuano, Subanen, Malay, Spanish, Portuguese, Italian, French, Catalan, Latin, English, Dutch, German, Swedish, Russian, Greek, Sanskrit, Hebrew, Arabic, Japanese, and Chinese.
Emil Krebs (18671930), German diplomat. By the time he left school, he could speak twelve languages. In 1914, he calculated that he could translate to and from German in thirty-two languages. Later he was said to know sixty or sixty-five languages, including English, Dutch, Icelandic, Norwegian, Danish, Swedish, Latin, Italian, Spanish, Portuguese, French, Catalan, Romanian, Russian, Ukrainian, Polish, Czech, Slovak, Serbo-Croatian, Slovenian, Bulgarian, Lithuanian, Latvian, Irish, Greek, Albanian, Armenian, Persian, Sanskrit, Hindi, Urdu, Gujarati, Hungarian, Finnish, Estonian, Georgian, Basque, Arabic, Hebrew, Syriac, Assyrian, Babylonian, Sumerian, Coptic, Swahili, Turkish, Tatar, Mongolian, Manchu, Japanese, Korean, Chinese, Tibetan, Burmese, Thai, Malay, and Javanese.
Minakata Kumagusu (18671941), Japanese scholar. He could read eighteen or nineteen languages, including Latin, Greek, Persian, and Arabic.
Rıza Tevfik Bölükbaşı (18691949), Turkish politician. He knew Turkish, English, German, French, Spanish, Italian, Latin, Albanian, Armenian, Persian, Arabic, and Hebrew.
Ahatanhel Krymsky (18711942), Ukrainian scholar. At the age of twenty-five, he was proficient in seventeen languages.
Sri Aurobindo (18721950), Indian philosopher. He could speak, read, and write Bengali, English, and French; read and write Sanskrit, Latin, and Greek; speak and read Gujarati, Marathi, and Hindi; and read German, Italian, and Spanish.
Harold Williams (18761928), New Zealand journalist. He knew more than forty languages, including Maori, Samoan, Tongan, Fijian, Ilocano, Russian, Ukrainian, Polish, Old Church Slavonic, Lithuanian, Latvian, Greek, Armenian, Persian, Sanskrit, Hungarian, Finnish, Estonian, Georgian, Turkish, Tatar, Buryat, Japanese, and Chinese.
Hrachia Acharian (18761953), Armenian linguist. Among the languages he knew were Armenian, Greek, English, German, French, Italian, Latin, Persian, Sanskrit, Hebrew, and Laz.
Harinath De (18771911), Indian scholar. He knew Hindi, Urdu, Bengali, Oriya, Marathi, Gujarati, Sanskrit, Pali, Persian, German, French, Spanish, Italian, Latin, Greek, and Arabic. He also had some knowledge of Danish, Dutch, Anglo-Saxon, Old and Middle High German, Portuguese, Romanian, Provençal, Hebrew, Turkish, and Chinese.
Martin Buber (18781965), Austrian philosopher. He spoke German, Yiddish, English, French, Italian, Polish, and Hebrew, and could read Dutch, Spanish, Latin, and Greek.
Muhammad Shahidullah (18851969), Bengali linguist. He knew twenty-four languages.
Ho Chi Minh (18901969), Vietnamese statesman. In addition to his native language, Vietnamese, he knew French, English, Russian, Cantonese, and Mandarin.
Ahmad Kasravi (18901946), Iranian scholar. He knew Persian, Middle Persian, Armenian, English, Arabic, and Esperanto.
Edmund Wilson (18951972), American literary critic. He studied French and Italian at university, and later learnt to read German, Russian, Hebrew, and some Hungarian.
Roman Jakobson (18961982), Russian linguist. He knew around twenty languages, including Russian, Czech, Bulgarian, French, and German.
William James Sidis (18981944), American child prodigy. He knew English, German, Russian, French, Latin, Greek, Armenian, and Turkish.
Paul Robeson (18981976), American singer and activist. He spoke ten languages, including Russian, German, French, Spanish, and Chinese, and had knowledge of a further ten. He sang in more than fifty languages.

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=== 20th century ===
==== 1900s ====
Sukarno (19011970), Indonesian politician. He spoke Javanese, Sundanese, Balinese, Indonesian, Dutch, German, English, French, Arabic, and Japanese.
Dora Bloch (19021976), Israeli hostage. She spoke Hebrew, Arabic, Russian, German, English, and Italian.
Steven Runciman (19032000), British historian. He began learning French, Latin, Greek, and Russian at a young age, and later learnt Bulgarian, Old Church Slavonic, Armenian, and some Turkish. He may also have had some knowledge of Arabic and a number of other languages.
John von Neumann (19031957), Hungarian mathematician. He spoke Hungarian, English, German, and French, and also knew Latin and Greek.
Syed Mujtaba Ali (19041974), Bangladeshi writer. He knew Bengali, Urdu, Hindi, Gujarati, Marathi, Sanskrit, Persian, Pashto, English, German, French, Italian, and Arabic.
Pent Nurmekund (19061996), Estonian linguist. He could read over eighty languages and could speak a great many of them.
H. S. David (19071981) Sri Lankan priest. He reportedly knew thirty-three languages: Tamil, Telugu, Kannada, Malayalam, Tulu, Kui, Brahui, Sinhalese, Hindi, Vedic, Sanskrit, Prakrit, Pali, Avestan, English, Dutch, German, Danish, Norwegian, Swedish, French, Spanish, Portuguese, Italian, Latin, Greek, Lithuanian, Russian, Malay, Arabic, Hebrew, Assyrian, and Sumerian.
Muhammad Hamidullah (19082002), stateless scholar. He knew ten languages and published works in seven of them (Urdu, Persian, English, German, French, Arabic, and Turkish).
João Guimarães Rosa (19081967), Brazilian novelist. He spoke Portuguese, Spanish, Italian, French, English, German, Esperanto, and some Russian, and could read with the aid of a dictionary Swedish, Dutch, Latin, and Greek. He studied the grammar of a number of other languages, including Sanskrit, Lithuanian, Polish, Czech, Danish, Finnish, Hungarian, Arabic, Hebrew, Japanese, and Tupi.
Kató Lomb (19092003), Hungarian interpreter. She spoke Hungarian, Russian, German, English, and French, and to a lesser extent Spanish, Italian, Polish, Japanese, and Chinese. She could also translate from Dutch, Swedish, Norwegian, Danish, Ukrainian, Czech, Bulgarian, Romanian, Portuguese, and Latin.
Uku Masing (19091985), Estonian scholar. He reputedly knew around sixty-five languages.
==== 1910s ====
Hugh Nibley (19102005), American scholar. He knew fourteen languages.
Lyuba Kutincheva (19101998), Bulgarian traveller. She spoke Bulgarian, Russian, Romanian, French, Turkish, Arabic, and Esperanto.
Enoch Powell (19121998), British politician and classical scholar. He spoke English, German, French, Italian, Modern Greek, and Urdu, and had a reading knowledge of Spanish, Portuguese, Russian, and Welsh. Among classical languages, he knew Ancient Greek, Latin, Hebrew, and Aramaic.
George L. Campbell (19122004), British linguist. He spoke forty-four languages and had a working knowledge of perhaps twenty others.
Meredith Gardner (19122002), American linguist and codebreaker. He spoke German, French, Italian, Spanish, Russian, Lithuanian, and Japanese, and could read Latin, Greek, Sanskrit, Old High German, Middle High German, and Old Church Slavonic.
Willy Brandt (19131992), German politician. He spoke German, English, Norwegian, Swedish, French, and Italian.
Toshihiko Izutsu (19141993), Japanese scholar. He knew more than thirty languages, including Arabic, Hebrew, Turkish, Persian, Sanskrit, Pali, Hindustani, Russian, Greek, and Chinese.
Aziz Ahmad (19141978), Pakistani novelist. He spoke Urdu, Persian, English, German, French, Italian, Arabic, and Turkish.
Charles Berlitz (19142003), American publisher and author. He learnt to speak English, German, French, and Spanish as a child, and ultimately came to speak thirty-two languages with varying degrees of fluency.
Vernon A. Walters (19172002), American soldier and diplomat. He spoke English, Dutch, German, French, Italian, Spanish, Portuguese, and Russian.
Anthony Burgess (19171993), British novelist and composer. He spoke English, German, French, Italian, Spanish, Russian, Chinese, and Malay.
Nabi Bakhsh Baloch (19172011), Pakistani scholar. He wrote in Sindhi, Seraiki, Urdu, Balochi, Persian, English, and Arabic.
Henryk Szeryng (19181988), Polish violinist. He spoke Polish, English, German, French, Italian, Spanish, and Portuguese.
Omeljan Pritsak (19192006), Ukrainian scholar. He spoke twelve languages.
Shūichi Katō (19192008), Japanese scholar. He spoke Japanese, Chinese, English, German, French, and Italian.
Fazlur Rahman Malik (19191988), Pakistani scholar. In addition to his native language, Urdu, he knew Arabic, Persian, English, German, French, Latin, and Ancient Greek.
==== 1920s ====
Pope John Paul II (19202005), former leader of the Catholic Church. In addition to his native language, Polish, he knew Latin, Italian, Spanish, Portuguese, French, English, and German.
Ahmad Hasan Dani (19202009), Pakistani archaeologist. He spoke fifteen languages, including French, Tamil, and Turkish.
Alessandro Bausani (19211988), Italian scholar. He had a good knowledge of as many as thirty languages, including Persian, Urdu, Arabic, Turkish, Indonesian, and Basque.
P. V. Narasimha Rao (19212004), Indian politician. He spoke seventeen languages, including English, German, Spanish, and French.
Max Mangold (19222015), Swiss linguist. He spoke almost forty languages.
Christopher Lee (19222015), British actor. He spoke English, German, French, Italian, and Spanish, and had some knowledge of Swedish, Russian, and Greek.
Michael Ventris (19221956), British architect and decipherer of Linear B. By the age of ten, he spoke English, German, Swiss German, French, and Polish. As an adult, he learnt Swedish, Danish, Italian, Spanish, Russian, Modern Greek, and some Turkish.
Stephen Wurm (19222001), Hungarian-born Australian linguist. "He was a genuine rapid language learner, and before he was 40, was fluent in five of the Germanic languages, five of the Romance languages, three Slavic languages, in Arabic, Swahili, Turkish, Uzbek, Mongol, Mandarin, Tok Pisin, and Police Motu, and could get by in perhaps 30 other languages—over 50 in all."
Jambuvijaya (19232009), Jain monk. He could read twenty-two languages, including Sanskrit, French, German, and Japanese.
Pope Benedict XVI (19272022), former leader of the Catholic Church. In addition to his native language, German, he spoke English, Italian, French, Spanish, and Latin, and could read Ancient Greek and Biblical Hebrew.
Hans Eberstark (19292001), Austrian interpreter. He interpreted into English and German from Dutch, French, Italian, Spanish, and Catalan. He also had some knowledge of Portuguese, Danish, Swedish, Norwegian, Surinamese Creole, Haitian Creole, Papiamento, Yiddish, several varieties of Swiss German, Albanian, Hebrew, and Amharic.

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==== 1930s ====
Barry Farber (19302020), American radio host. When inducted into the army, he qualified for work in fourteen languages. He had some knowledge of twenty-five languages in total.
George Fernandes (19302019), Indian politician. In addition to his mother tongue, Konkani, he spoke Marathi, Hindi, Urdu, English, Tamil, Malayalam, Kannada, and Tulu. He also knew Latin.
P. B. Sreenivas (19302013), Indian singer. He spoke eight languages, including Kannada, Urdu, and English.
Abdul Rahman Ghassemlou (19301989), Iranian politician. He spoke Kurdish, Persian, English, German, French, Russian, Czech, Slovak, Turkish, Azerbaijani, and Arabic.
Jon Elia (19312002), Pakistani poet. He knew Urdu, Sanskrit, Persian, English, Arabic, and Hebrew.
Corazon Aquino (19332009), former president of the Philippines. She spoke Kapampangan, Tagalog, English, Spanish, French, and Japanese.
Kenneth L. Hale (19342001), American linguist. He spoke over fifty languages, including Spanish, Portuguese, French, Dutch, Irish, Polish, Basque, Turkish, Hebrew, Chinese, Japanese, Navajo, Jemez, Hopi, Oʼodham, Wômpanâak, Ulwa, Miskitu, Warlpiri, and Lardil.
Jeong Su-il (19342025), Chinese-born North Korean spy. He spoke Korean, Chinese, Japanese, Tagalog, Malay, Arabic, Persian, Russian, French, Spanish, German, and English.
William Fulco (19362021), American Jesuit priest and scholar. He knew nine languages, including Latin, Greek, German, Aramaic, and Hebrew.
Pope Francis (19362025), former leader of the Catholic Church. Born in Argentina and of Italian descent, he spoke Spanish and Italian natively. In addition, he knew Latin, and could converse in German, French, Portuguese, and English.
Madeleine Albright (19372022), former U.S. secretary of state. She spoke Czech, Polish, Serbo-Croatian, Russian, English, German, and French.
Ivan Argüelles (19392024), American poet. He knew most of the Romance languages (including Spanish, French, Italian, Portuguese, Catalan, Provençal, and Romanian) and a number of Indic languages (Hindi, Bengali, Sinhala, and Nepali), as well as Persian, German, Russian, Arabic, and some Chinese. He also studied Latin, Ancient Greek, Sanskrit, Old Scandinavian, and Old Icelandic.
==== Post-1930s ====
Michael Henry Heim (19432012), American literary translator. He knew twelve languages and translated from eight of them: Russian, Czech, Serbo-Croatian, German, Dutch, French, Romanian, and Hungarian.
John Boswell (19471994), American historian. He spoke or read several Scandinavian languages, Old Icelandic, German, French, Spanish, Italian, Latin, Greek, early and modern Russian, Old Church Slavonic, Armenian, Persian, Arabic, Hebrew, Syriac, and Akkadian.
Daniel Kane (19482021), Australian linguist. He knew English, Italian, French, Spanish, Latin, Russian, Chinese, Jurchen, Khitan, and Esperanto.
J. Jayalalithaa (19482016), Indian politician and actress. She spoke Tamil, Malayalam, Kannada, Telugu, Hindi, and English.
Robert Hübner (19482025), German chess grandmaster. He spoke a dozen languages.
Sergei Starostin (19532005), Russian linguist. He spoke Russian, Polish, English, German, and French, and could read a further thirteen Slavic languages, as well as Chinese, Japanese, Dutch, Spanish, Italian, Latin, Greek, and Sanskrit. Through his research, he had some knowledge of a wide range of other languages.
Dikembe Mutombo (19662024), Congolese basketball player. He spoke English, French, Spanish, Portuguese, Tshiluba, Swahili, Lingala, and two other Central African languages.
Shahab Ahmed (19662015), Pakistani scholar. He mastered around fifteen languages.
Moses McCormick (19812021), American YouTuber. He spoke around twenty languages at a basic conversational level.
== Living ==
=== Africa ===
Peter Turkson (1948), Ghanaian Catholic cardinal. In addition to his native language, Fante, he speaks a number of other Ghanaian languages, as well as English, French, Italian, German, and Hebrew. He also knows Latin and Greek.
Mohamoud Dirir Gheddi (1959) Ethiopian politician. He speaks Somali, Oromo, Amharic, Harari, Arabic, English, French, and some Tigrigna.
Trevor Noah (1984), South African comedian. He speaks English, Afrikaans, Zulu, Xhosa, Tswana, Tsonga, and some German.
=== Asia ===
Lokesh Chandra (1927), Indian scholar. He knows Sanskrit, Pali, Hindi, Avestan, Old Persian, Greek, Latin, French, German, English, Russian, Chinese, Tibetan, Mongolian, Japanese, and Indonesian.
Mickey Curtis (1938), Japanese actor and singer. He speaks Japanese, English, German, French, Italian, and Thai.
Bartholomew I (1940), Ecumenical Patriarch of Constantinople. He knows Turkish, Greek, English, German, French, Italian, and Latin.
Levon Ter-Petrosyan (1945), former president of Armenia. He speaks Armenian, Russian, French, English, German, Arabic, and Assyrian. He also knows a number of ancient languages.
Gloria Macapagal Arroyo (1947), former president of the Philippines. She speaks Tagalog, Kapampangan, Ilocano, Cebuano, Spanish, and English.
Malcolm Ranjith (1947), current archbishop of Colombo. He speaks Sinhala, English, German, French, Spanish, Italian, Tamil, and Indonesian. He also knows Latin, Greek, and Hebrew.
Péter Frankl (1953), Hungarian mathematician, now living in Japan. He speaks eleven languages, including Hungarian, Japanese, Chinese, English, and French.
Kamal Haasan (1954), Indian actor. He speaks Tamil, Malayalam, Kannada, Telugu, Hindi, Marathi, and English.
Shabnam Mausi (1955), Indian politician. She speaks twelve languages.
Naela Chohan (1958), Pakistani diplomat. She speaks Urdu, Punjabi, Bengali, Persian, English, French, and Spanish.
Prakash Raj (1965), Indian actor. He speaks Kannada, Tulu, Tamil, Malayalam, Telugu, Hindi, and English.
Hikmat Hasanov (1975), Azerbaijani military officer. He speaks Azerbaijani, Turkish, Armenian, Russian, English, and Persian.
Asin Thottumkal (1985) Indian actress. She speaks Malayalam, Tamil, Telugu, Hindi, English, and French.
Priya Anand (1986), Indian actress. She speaks Tamil, Telugu, Hindi, Bengali, Marathi, Spanish, and English.
Henrikh Mkhitaryan (1989), Armenian footballer. He speaks Armenian, Russian, English, German, French, and Portuguese.

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title: "List of polyglots"
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=== Europe ===
John C. Wells (1939), British phonetician. He studied Latin and Ancient Greek at university, and speaks English, German, Welsh, French, Spanish, Italian, Modern Greek, and Esperanto with varying degrees of fluency. He also has some knowledge of Polish, Russian, Swedish, Danish, Norwegian, and Japanese.
Werner Herzog (1942), German filmmaker. In addition to his native Bavarian, he knows German, English, Ancient Greek, Modern Greek, Latin, Spanish, French, and some Italian.
Queen Silvia of Sweden (1943), spouse of King Carl XVI Gustaf. The daughter of a German father and a Brazilian mother, she speaks German and Portuguese natively. She also knows Spanish, French, English, and Swedish, and has some knowledge of Swedish sign language.
André Rieu (1949), Dutch violinist and conductor. He speaks Dutch, English, German, French, Spanish, and Italian.
Arsène Wenger (1949), French football manager. He speaks French, German, English, Spanish, and Italian, and has some knowledge of Japanese.
Noel Malcolm (1956), British historian. He speaks most Western and Eastern European languages.
Ranga Yogeshwar (1959), Luxembourgish physicist and science journalist. He speaks Luxembourgish, German, English, French, Hindi, Tamil, Kannada, and Malayalam.
Johan Vandewalle (1960), Belgian linguist. In 1987, at the age of twenty-six, he won the Polyglot of Flanders/Babel Prize, after demonstrating communicative competence in nineteen languages (Arabic, Azerbaijani, Bashkir, Dutch, English, French, German, Italian, Kyrgyz, Persian, Russian, Swahili, Tajik, Tatar, Turkish, Turkmen, Tuvan, Uyghur, and Uzbek).
Frans Timmermans (1961), Dutch politician. He speaks Dutch, English, German, French, Italian, and Russian.
Sigrid Kaag (1961), Dutch politician. She speaks Dutch, English, German, French, Spanish, and Arabic.
Elia Wallgrén (1961), Finnish Orthodox archbishop. He speaks Finnish, Estonian, Swedish, English, German, Spanish, Czech, Polish, and Russian with varying degrees of fluency.
José Mourinho (1963), Portuguese football manager. He speaks Portuguese, Spanish, Italian, French, Catalan, and English.
Ioannis Ikonomou (1964), translator at the European Commission. He speaks thirty-two modern languages, including twenty-one of the twenty-four official languages of the European Union (the three exceptions being Estonian, Maltese, and Irish). Among the other languages that he speaks are Russian, Bengali, Persian, Turkish, Arabic, Hebrew, Amharic, and Mandarin. He has also studied a number of ancient languages, such as Old Church Slavonic, Classical Armenian, Sanskrit, Sogdian, and Assyro-Babylonian.
Karin Kneissl (1965), Austrian diplomat and politician. She speaks German, English, French, Italian, Spanish, and Arabic, and has some knowledge of Russian, Hungarian, and Hebrew.
Connie Nielsen (1965), Danish actress. She speaks Danish, Norwegian, Swedish, English, German, French, Italian, and some Spanish.
Anatoly Moskvin (1966), Russian linguist, arrested in 2011 after twenty-six mummified bodies were discovered in his home. He has studied thirteen languages.
Mikheil Saakashvili (1967), former president of Georgia. He speaks Georgian, Russian, Ukrainian, English, and French, and has some command of Spanish and Ossetian.
Gianni Infantino (1970), current president of FIFA. Born in Switzerland to Italian parents, he speaks Italian, French, and Swiss German natively. He also knows English, Spanish, Portuguese, and Arabic.
Toto Wolff (1972), Austrian motorsport executive. He speaks German, English, French, Italian, Spanish, and Polish.
Željko Joksimović (1972), Serbian singer-songwriter. He speaks Serbian, Russian, Polish, Greek, English, and French.
Clarence Seedorf (1976), Dutch former footballer. He speaks Dutch, English, Italian, Portuguese, Spanish, and Surinamese.
Richard Simcott (1977), British language consultant. He speaks sixteen languages (English, French, Spanish, Welsh, German, Macedonian, Swedish, Italian, Serbian, Portuguese, Czech, Catalan, Russian, Dutch, Romanian, and Albanian) and can use around fifty languages in total to some degree.
Zdeno Chára (1977), Slovak ice hockey player. He speaks Slovak, Czech, Polish, Russian, Swedish, German, and English.
Daniel Tammet (1979), British author. In his book Born on a Blue Day, he states that he knows ten languages: English, German, Icelandic, French, Spanish, Romanian, Welsh, Lithuanian, Finnish, and Esperanto.
Victor Bayda (c.1981), Russian linguist. He speaks Russian, Irish, Scottish Gaelic, Welsh, Icelandic, Swedish, English, Dutch, German, and French.
Philip Crowther (1981), Luxembourgish journalist. He speaks Luxembourgish, German, English, French, Spanish, and Portuguese.
Mikel Arteta (1982), Spanish football manager. He speaks Basque, Spanish, Catalan, Portuguese, French, Italian, and English.
Novak Djokovic (1987), Serbian tennis player. He speaks Serbian, English, German, French, Italian, and Spanish.
Ivan Rakitić (1988), Croatian footballer. He speaks Croatian, English, German, French, Italian, and Spanish.
Miralem Pjanić (1990), Bosnian footballer. He speaks Bosnian, Luxembourgish, German, English, French, and Italian.
Romelu Lukaku (1993), Belgian footballer. He speaks Dutch, English, German, French, Spanish, Portuguese, Italian, and Lingala.

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=== North America ===
Powell Janulus (1939), Canadian court interpreter. According to the 1986 Guinness Book of World Records, he "has worked with 41 languages in the Provincial Court of British Columbia, Vancouver, Canada."
Stephen Krashen (1941), American linguist. He knows English, German, Yiddish, Spanish, French, Hebrew, and Amharic.
Steve Kaufmann (1945), Canadian businessman. He has some understanding of twenty languages, although his ability to speak and write these languages varies to a considerable degree. Some of the languages he has studied are French, Spanish, Portuguese, German, Swedish, Russian, Japanese, Mandarin, and Cantonese.
Pope Leo XIV (1955), leader of the Catholic Church. He speaks English, Italian, Spanish, Portuguese, and French, and can read Latin and German.
Viggo Mortensen (1958), Danish-American actor. He grew up bilingual in English and Spanish, and later learnt Danish, Italian, and French. He also has some knowledge of Arabic.
Julie Payette (1963), former governor general of Canada. She speaks French and English natively, and can converse in Spanish, Italian, Russian, and German.
Alexander Argüelles (1964), American linguist. He speaks most of the Germanic and Romance languages (in particular, German, Dutch, Swedish, French, Spanish, Portuguese, and Italian), as well as Russian, Korean, and Arabic, and he has a reading knowledge of many more languages, such as Persian and Old Norse.
Alberto Lati (1978), Mexican sports journalist. He speaks Spanish, English, Hebrew, Portuguese, German, Italian, Mandarin, Japanese, French, Greek, and Zulu with varying degrees of fluency.
Pete Buttigieg (1982), American politician. He speaks English, Norwegian, Spanish, French, Italian, Maltese, Arabic, and Dari with varying degrees of fluency.
Timothy Doner (1995), American foreign-policy analyst. He speaks English, German, French, Persian, Arabic, and Hebrew, and has some knowledge of a number of other languages, including Dutch, Yiddish, Italian, Latin, Russian, Croatian, Hindi, Pashto, Kurdish, Turkish, Indonesian, Mandarin, Hausa, Swahili, Xhosa, and Ojibwe.
=== Oceania ===
Sam Lim (1961), Malaysian-born Australian politician. He can speak ten languages, including Malay, Indonesian, Mandarin, and Burmese.
Ghil'ad Zuckermann (1971), Israeli linguist, now living in Australia. He can speak eleven languages, and has some knowledge of eleven more.
=== South America ===
Martha Argerich (1941), Argentine pianist. She speaks Spanish, Portuguese, French, Italian, German, and English.
Ziad Fazah (1954), Liberian-born Lebanese language teacher, now living in Brazil. He is famous for claiming to speak more than fifty languages, and for a time was listed in The Guinness Book of Records. It is unclear how many languages he can in fact speak.
Andrew Divoff (1955), Venezuelan actor and producer. He speaks Spanish, Portuguese, Catalan, French, Italian, English, German, and Russian. At one time he also knew Romanian, but forgot it through lack of use.
Sérgio Meira (1968), Brazilian linguist. He speaks Portuguese, French, Italian, Spanish, Romanian, English, German, and Esperanto, and to a lesser extent Catalan, Dutch, Russian, and Tiriyó. He can read with a dictionary Swedish, Latin, and Greek (both classical and modern), and has considerable knowledge of Volapük.
== References ==

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title: "List of radicals in Unicode"
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The List of Unicode radicals comprises those Unicode characters that represent radical components of CJK characters, Tangut characters or Yi syllables. These are used primarily for indexing characters in dictionaries.
There are two CJK radicals blocks: the "Kangxi Radicals" block that includes the 214 standard radicals used in the Kangxi Dictionary; and the "CJK Radicals Supplement" block that includes 115 radical components used in other modern dictionaries, including simplified Chinese and Japanese radicals forms.
There is one "Tangut Components" block that includes 768 radicals and components that are used to index Tangut characters in dictionaries of the Tangut script or to describe the structure of Tangut characters.
There is one "Yi Radicals" block that includes 55 radicals used to index Yi characters in dictionaries of the standardized Yi script used for writing the Nuosu language in Southern Sichuan and Northern Yunnan.
Sets of radicals for other sinoform scripts, such as Jurchen, have also been proposed for encoding in Unicode.
== Unicode tables ==
== See also ==
Section headers of a Chinese dictionary
List of Shuowen Jiezi radicals, a system of 540 components used by Xu Shen (d. ~147AD) in his Shuowen Jiezi
List of Kangxi radicals, a system of 214 components used by the Kangxi dictionary (1716), made under the leadership of the Kangxi Emperor
List of Xinhua Zidian radicals
Chinese characters description languages, computer and SVG based descriptions of CJK characters
== References ==

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title: "List of schools of linguistics"
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category: "reference"
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---
This is a list of schools in linguistics.
Columbia School of Linguistics
Copenhagen School
Formal linguistics
Functional linguistics
Systemic functional linguistics
Sydney School
Kharkiv Linguistic School
Leiden school
Leiden University Centre for Linguistics (LUCL)
London School of Linguistics
Moscow School of Comparative Linguistics
Prague linguistic circle
Structural linguistics
== References ==

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title: "List of summer schools of linguistics"
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tags: "science, encyclopedia"
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This is a list of summer schools of linguistics.
Eastern Generative Grammar (The EGG):
Romania: Brašov, Romania (2024)
Serbia: Novi Sad, Serbia (2023)
Czech Republic: Brno, Czech Republic (2022)
Online: (2021)
Poland: Wrocław, Poland (2019)
Hungary: European Summer School in Generative Grammar (EGG) - Debrecen (2014)
European Summer School in Logic, Language and Information (ESSLLI)
Belgium: Leuven, Belgium (2024)
Slovenia: Ljubljana, Slovenia (2023)
Ireland: Galway, Ireland (2022)
Netherlands: Utrecht, Netherlands (2021)
Germany: Forensic Linguistics Short Course (FLsc) - Düsseldorf (20182019, 20212024)
Germany: Summer School on Corpus Phonology - Augsburg (2008)
Greece: The Crete Summer School of Linguistics (CreteLing) - Rethymno (2017, 2018, 2019, 2022, 2023, 2024)
Poland: Summer Institute "Languages and Cultures in Contact / in Contrast" - Zakopane (2008)
Portugal: NOVA - Lisbon Summer School and Graduate Conference in Linguistics - Lisbon
Portugal: U. Minho - APL Summer School of Linguistics 2015: Experimental Methods in Syntax - Braga
United Kingdom: International Summer School in Forensic Linguistic Analysis - Birmingham (20002010)
United States: Summer Institute of Linguistics - University of North Dakota (every summer)
United States: Linguistics Society of America Summer Institutes, held in odd-numbered years, including:
Empirical Foundations for Theories of Language - Stanford (2007)
Linguistic Structure and Language Ecologies - UC Berkeley (2009)
Language in the World - University of Colorado at Boulder (2011)
Universality and Variability - University of Michigan (2013)
Linguistic Theory in a World of Big Data - University of Chicago (2015)
Language Across Space and Time - University of Kentucky (2017)
Linguistics in the Digital Era - University of California, Davis (2019)
Linguistics as Cognitive Science: universality and variation - University of Massachusetts, Amherst (2023)
InField (Institute on Field Linguistics and Language Documentation) and its successor CoLang (Institute on Collaborative Language Research), held in even-numbered years, including:
United States: InField - University of California, Santa Barbara (2008)
United States: InField - University of Oregon (2010)
United States: CoLang - University of Kansas (2012)
United States: CoLang - University of Texas at Arlington (2014)
United States: CoLang - University of Alaska Fairbanks (2016)
United States: CoLang - University of Florida (2018)
Netherlands: Leiden Summer School in Languages and Linguistics - Leiden
Netherlands: LOT Winter School - Leiden/Amsterdam/Nijmegen/Groningen/Utrecht (fixed rotation)
Netherlands: LOT Summer School - Leiden/Amsterdam/Nijmegen/Groningen/Utrecht (fixed rotation)
Netherlands: Utrecht Summer School - Utrecht (2010)
Norway: International Summer School Oslo - Oslo (2011)
Russia: NYI Institute of Linguistics, Cognition and Culture - St. Petersburg every summer since 2003
France: International School in Linguistic Fieldwork (FieldLing) every summer since 2010
== See also ==
Lists of schools
List of schools of linguistics
== References ==

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title: "List of syntactic phenomena"
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---
A list of phenomena in syntax.
Anaphora
Agreement
Answer ellipsis
Antecedent-contained deletion
Binding
Case
Clitics
Control
Coreference
Differential Object Marking
Discontinuity
Do-support
Dummy pronouns
Ellipsis
Ergative verb
Exceptional case-marking
Existential clauses
Expletives
Extraposition
Gapping
Heavy NP shift
Inverse copula sentences
Movement paradoxes
Negative inversion
Non-configurational language
Parasitic gaps
Pied-piping
Pro-drop
Pseudogapping
Raising (linguistics)
Reciprocal (grammar)
Reflexive pronouns
Reflexive verbs
Right node raising
Scrambling
Shifting
Sluicing
Small clause
Stripping
Subject-auxiliary inversion
Subject-verb inversion
Topicalization
Tough movement
Unaccusative verbs
V2 word order
Verb phrase ellipsis
Wh-movement

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title: "List of text corpora"
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Text corpora (singular: text corpus) are large and structured sets of texts, which have been systematically collected. Text corpora are used by both AI developers to train large language models and corpus linguists and within other branches of linguistics for statistical analysis, hypothesis testing, finding patterns of language use, investigating language change and variation, and teaching language proficiency.
== English language ==
American National Corpus
Bank of English
BookCorpus
British National Corpus
Bergen Corpus of London Teenage Language (COLT)
Brown Corpus, forming part of the "Brown Family" of corpora, together with LOB, Frown and F-LOB
COCA: see below at English-Corpora.org
COHA: see below at English-Corpora.org
Corpus Resource Database (CoRD), more than 80 English language corpora.
Coruña Corpus, a corpus of late Modern English scientific writing covering the period 17001900, developed by the Muste research group at the University of A Coruña
DBLP Discovery Dataset (D3), a corpus of computer science publications with sentient metadata.
English-Corpora.org, which contains (among others):
iWeb, the Intelligent Web-based Corpus: 14 billion words, 6 countries, 2017
COCA, the Corpus of Contemporary American English: 1.0 billion words, American, 1990-2019
COHA, the Corpus of Historical American English: 475 million words, American, 1820-2019
NOW, News on the Web: 23.2 billion+ words, 20 countries, 2010-present
English Trends, a large English monitor corpus of news articles gathered from RSS feeds, 86+ billion words, 2014present
GUM corpus, the open source Georgetown University Multilayer corpus, with very many annotation layers
Google Books Ngram Corpus
International Corpus of English
Oxford English Corpus
RE3D (Relationship and Entity Extraction Evaluation Dataset)
Santa Barbara Corpus of Spoken American English
Scottish Corpus of Texts & Speech
Strathy Corpus of Canadian English
== European languages ==
CETENFolha
Basque:
The Corpus of Electronic Texts
Corpus Inscriptionum Insularum Celticarum (CIIC), covering Primitive Irish inscriptions in Ogham
Google Books Ngram Corpus
The Georgian Language Corpus
Thesaurus Linguae Graecae (Ancient Greek)
Eastern Armenian National Corpus (EANC) 110 million words. Freely searchable online.
Spanish text corpus by Molino de Ideas, which contains 660 million words.
CorALit: the Corpus of Academic Lithuanian Academic texts published in 19992009 (approx. 9 million words). Compiled at the University of Vilnius, Lithuania
Reference Corpus of Contemporary Portuguese (CRPC)
Turkish National Corpus
CoRoLa - The Reference Corpus of the Contemporary Romanian Language (Corpus reprezentativ al limbii române contemporane )
TS Corpus - A large set of Turkish corpora. TS Corpus is a Free&Independent Project that aims to build Turkish corpora, NLP tools and linguistic datasets...
MacMorpho - an annotated corpus of Brazilian Portuguese text
=== Slavic ===
==== East Slavic ====
Belarusian N-korpus
Russian National Corpus
General Internet Corpus of Russian
General Regionally Annotated Corpus of Ukrainian
Ukrainian Language Corpus on the Mova.info Linguistic Portal
Ukrainian Language Corpus
Araneum Russicum
Russian Corpus of Biographical Texts
RuTweetCorp
RusAge: Corpus for Age-Based Text Classification
==== South Slavic ====
Bulgarian National Corpus
Macedonian Electronic Corpus
Croatian Language Corpus
Croatian National Corpus
Slovenian National Corpus
==== West Slavic ====
Czech National Corpus
National Corpus of Polish
Slovak National Corpora
=== German ===
German Reference Corpus (DeReKo) More than 4 billion words of contemporary written German.
Free corpus of German mistakes from people with dyslexia
== Middle Eastern Languages ==
Corpus Inscriptionum Semiticarum
Kanaanäische und Aramäische Inschriften
Hamshahri Corpus (Persian)
Persian in MULTEXT-EAST corpus (Persian)
Amarna letters (for Akkadian, Egyptian, Sumerogram's, etc.)
TEP: Tehran English-Persian Parallel Corpus
PTC: Persian Today Corpus: The Most Frequent Words of Today Persian, based on a one-million-word corpus (in Persian: Vāže-hā-ye Porkārbord-e Fārsi-ye Emrūz), Hamid Hassani, Tehran, Iran Language Institute (ILI), 2005, 322 pp. ISBN 964-8699-32-1
Kurdish-corpus.uok.ac.ir (Kurdish-corpus Sorani dialect) University of Kurdistan, Department of English Language and Linguistics
Bijankhan Corpus A Contemporary Persian Corpus for NLP researches, University of Tehran, 2012
Neo-Assyrian Text Corpus Project
Quranic Arabic Corpus (Classical Arabic)
Electronic Text Corpus of Sumerian Literature
Open Richly Annotated Cuneiform Corpus
Asosoft text corpus Central Kurdish (Sorani)
Thesaurus Linguae Aegyptiae (ancient Egyptian, Afro-Asiatic)
== Turkic languages ==
Uzbek national corpus (20 million words)
== Devanagari ==
Nepali Text Corpus (90+ million running words/6.5+ million sentences)
== East Asian Languages ==
Kotonoha Japanese language corpus
LIVAC Synchronous Corpus (Chinese)
== South Asian Languages ==
Hindi:
SinMin dataset (Sinhala)
== African languages ==
Amharic:
Creole (Gulf of Guinea):
Hausa:
Igbo:
Oromo:
Yoruba:
Zulu:

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== Parallel corpora of diverse languages ==
Chinese/English Political Interpreting Corpus (CEPIC) consists of transcripts of speeches delivered by top political figures from Hong Kong, Beijing, Washington DC and London, as well as their translated/interpreted texts. Developed by Jun Pan and HKBU Library.
Europarl Corpus - proceedings of the European Parliament from 1996 to 2012
EUR-Lex corpus - collection of all official languages of the European Union, created from the EUR-Lex database
OPUS: Open source Parallel Corpus in many many languages
Tatoeba A parallel corpus which contains over 8.9 million sentences in multiple languages; 107 languages have more than 1,000 sentences each; a further 81 languages have from 100 to 1,000 sentences each.
NTU-Multilingual Corpus in 7 languages (ara, eng, ind, jpn, kor, mcn, vie) (legacy repo)
SeedLing corpus - A Seed Corpus for the Human Language Project with 1000+ languages from various sources.
GRALIS parallel texts for various Slavic languages, compiled by the institute for Slavic languages at Graz University (Branko Tošović et al.)
The ACTRES Parallel Corpus (P-ACTRES 2.0) is a bidirectional English-Spanish corpus consisting of original texts in one language and their translation into the other. P-ACTRES 2.0 contains over 6 million words considering both directions together.
The JRC-Acquis Multilingual Parallel Corpus of the total body of European Union (EU) law: Acquis Communautaire with 231 language pairs.
European Parliament Proceedings Parallel Corpus 19962011
The Opus project aims at collecting freely available parallel corpora Archived 2013-12-14 at the Wayback Machine
Japanese-English Bilingual Corpus of Wikipedia's Kyoto Articles Archived 2012-08-22 at the Wayback Machine
COMPARA Portuguese/English parallel corpora
TERMSEARCH English/Russian/French parallel corpora (Major international treaties, conventions, agreements, etc.
TradooIT English/French/Spanish Free Online tools
Nunavut Hansard English/Inuktitut parallel corpus
ParaSol A parallel corpus of Slavic and other languages
Glosbe: Multilanguage parallel corpora Archived 2013-05-27 at the Wayback Machine with online search interface
InterCorp: A multilingual parallel corpus 40 languages aligned with Czech, online search interface
myCAT Olanto, concordancer (open source AGPL) with online search on JCR and UNO corpus
TAUS, with online search interface.
linguatools multilingual parallel corpora, online search interface.
EUR-Lex Corpus corpus built up of the EUR-Lex database consists of European Union law and other public documents of the European Union
Language Grid Multilingual service platform that includes parallel text services
== Comparable Corpora ==
Corpus of Political Speeches contains four collections of political speeches in English and Chinese from The Corpus of U.S. Presidential Speeches (17892015), The Corpus of Policy Address by Hong Kong Governors (19841996) and Hong Kong Chief Executives (19972014), The Corpus of Speeches given on New Year's days and Double Tenth days by Taiwan Presidents (19782014), and The Corpus of Report on the Work of the Government by Premiers of the People's Republic of China (19842013). Developed by HKBU Library.
WaCky - The Web-As-Corpus Kool Yinitiative Web as Corpus (eng, fre, deu, ita)
Disambiguating Similar Language Corpora Collection (DSLCC) (Bosnian, Croatian, Serbian, Indonesian, Malay, Czech, Slovak, Brazilian Portuguese, European Portuguese, Peninsular Spanish, Argentine Spanish)
Wikipedia Comparable Corpora(registration required) when (41 million aligned Wikipedia articles for 253 language pairs)
The TenTen Corpus Family comparable web corpora of target size 10 billion words. These corpora are available in the corpus management system Sketch Engine, currently, there exist TenTen corpora for more than 30 languages (such as English TenTen corpus, Arabic TenTen corpus, Spanish TenTen corpus, Russian Tenten corpus,). The overview of existing TenTen corpora can be found at https://www.sketchengine.co.uk/documentation/tenten-corpora/
Timestamped JSI web corpora web corpora of news articles crawled from a list of RSS feeds. Newsfeed corpora are being prepared in the framework of the project implemented by the Jožef Stefan Institute at Slovenian scientific research institute. and published in Sketch Engine. More information about the project is on the project websites.
== L2 (English) Corpora ==
Cambridge Learner Corpus
Corpus of Academic Written and Spoken English (CAWSE), a collection of Chinese students English language samples in academic settings. Freely downloadable online.
English as a Lingua Franca in Academic Settings (ELFA), an academic ELF corpus.
International Corpus of Learner English (ICLE), a corpus of learner written English.
Louvain International Database of Spoken English Interlanguage (LINDSEI), a corpus of learner spoken English.
Trinity Lancaster Corpus, one of the largest corpus of L2 spoken English.
University of Pittsburgh English Language Institute Corpus (PELIC)
Vienna-Oxford International Corpus of English (VOICE), an ELF corpus.
== References ==
== See also ==
Ancient text corpora
Wiktionary:Corpora

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title: "List of textbooks on classical mechanics and quantum mechanics"
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This is a list of notable textbooks on classical mechanics and quantum mechanics arranged according to level and surnames of the authors in alphabetical order.
== Undergraduate ==
=== Classical mechanics ===
Feynman, Richard P. (2005). The Feynman Lectures on Physics. Vol. 1 (2nd ed.). Addison-Wesley. ISBN 978-0-8053-9065-0.
Halliday, David; Resnick, Robert (1970). Fundamentals of Physics. John Wiley & Sons. Chapters 121. Numerous subsequent editions.
Hamill, Patrick (2014). A Student's Guide to Lagrangians and Hamiltonians. Cambridge University Press. ISBN 978-1107617520.
Hand, Louis; Finch, Janet (1998). Analytical Mechanics. Cambridge University Press. ISBN 0521573270.
Kibble, T. W.; Berkshire, F. H. (2004). Classical Mechanics. Imperial College Press. ISBN 1860944248.
Kleppner, Daniel; Kolenkow, Robert (1973). An Introduction to Mechanics. McGraw-Hill. ISBN 0-07-035048-5.
Marion, Jerry; Thornton, Stephen (2003). Classical Dynamics of Particles and Systems (5th ed.). Brooks Cole. ISBN 0534408966.
Morin, David (2005). Introduction to Classical Mechanics: With Problems and Solutions. Cambridge University Press. ISBN 9780521876223.
Müller-Kirsten, Harald J.W. (2024). Classical Mechanics and Relativity (2nd ed.). World Scientific. ISBN 9789811287114.
Taylor, John (2005). Classical Mechanics. University Science Books. ISBN 978-981-12-8711-4.
Young, Hugh D.; Freedman, Roger A. (2019). University Physics with Modern Physics (15th ed.). Pearson. ISBN 978-0135159552.
=== Quantum mechanics ===
Eisberg, Robert; Resnick, Robert (1985). Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles (2nd ed.). Wiley & Sons. ISBN 978-0471873730.
Feynman, Richard P. (2005). The Feynman Lectures on Physics. Vol. 3 (2nd ed.). Addison-Wesley. ISBN 978-0-8053-9065-0.
French, A. P.; Taylor, Edwin (1978). An Introduction to Quantum Physics. W. W. Norton & Company. ISBN 0393091066.
Gasiorowicz, Stephen (2003). Quantum Physics (3rd ed.). Wiley. ISBN 978-0471057000.
Griffiths, David (2005). Introduction to Quantum Mechanics (2nd ed.). Pearson Prentice Hall. ISBN 0131118927.
McIntyre, David H. (2012). Quantum Mechanics: A Paradigms Approach (1st ed.). Pearson Addison-Wesley. ISBN 978-0-321-76579-6.
Townsend, John (2012). A Modern Approach to Quantum Mechanics (2nd ed.). University Science Books. ISBN 978-1-891389-78-8.
Zettili, Nouredine (2009). Quantum Mechanics: Concepts and Applications. Chichester, UK: Wiley. ISBN 978-0470026793.
Binney, James; Skinner, David (2014). The Physics of Quantum Mechanics (1st ed.). Oxford University Press. ISBN 978-0-19-968856-2.
== Advanced undergraduate and graduate ==
=== Classical mechanics ===
Abraham, R.; Marsden, J. E. (2008). Foundations of Mechanics: A Mathematical Exposition of Classical Mechanics with an Introduction to the Qualitative Theory of Dynamical Systems (2nd ed.). AMS Chelsea Publishing. ISBN 978-0-8218-4438-0.
Arnold, V. I. (1997), Mathematical Methods of Classical Mechanics (2nd ed.), Springer-Verlag, ISBN 0-387-96890-3
Fetter, A. L.; Walecka, J. D. (1980). Theoretical mechanics of particles and continua. New York: McGraw-Hill. ISBN 978-0-07-020658-8. OCLC 6110997.
Goldstein, H. (1980). Classical Mechanics (2 ed.). Addison-Wesley. ISBN 0201029189.
Knauf, A. (2018). Mathematical Physics: Classical Mechanics. Springer. ISBN 9783662557723.
Lanczos, C. (1986). The Variational Principles of Mechanics (4th ed.). Dover Publications. ISBN 0486650677.
Landau, L. D.; Lifshitz, E. M. (1976). Course of Theoretical Physics Volume 1 - Mechanics. Translated by Sykes, J. B.; Bell, J. S. (3rd ed.). Elsevier. ISBN 0-7506-2896-0.
Marsden, J. E.; Ratiu, T. S. (1999). Introduction to Mechanics and Symmetry: A Basic Exposition of Classical Mechanical Systems (2nd ed.). Springer. ISBN 978-1-4419-3143-6.
Papastavridis, J. G. (2014). Analytical Mechanics: A Comprehensive Treatise on the Dynamics of Constrained Systems. World Scientific. ISBN 978-981-4338-71-4.
Sommerfeld, A. (1952). Mechanics: lectures on theoretical physics. New York: Academic Press Inc. ISBN 978-0-12-654670-5. OCLC 803152309. {{cite book}}: ISBN / Date incompatibility (help)
Whittaker, E. T. (1999). A treatise on the analytical dynamics of particles and rigid bodies : with an introduction to the problem of three bodies (4th ed.). Cambridge University Press. ISBN 0-521-35883-3.
=== Quantum mechanics ===
Cohen-Tannoudji, Claude; Diu, Bernard; Laloë, Franck (1977). Quantum Mechanics. Wiley. ISBN 978-0471164333. Three volumes.
Dirac, Paul (1958). The Principles of Quantum Mechanics (4th ed.). Oxford University Press. ISBN 978-0-198-52011-5. {{cite book}}: ISBN / Date incompatibility (help)
Feynman, Richard; Hibbs, Albert (2010). Styer, Daniel (ed.). Quantum Mechanics and Path Integrals. Dover Publications. ISBN 9780486477220.
Landau, L. D, and Lifshitz, E. M. Course of Theoretical Physics Volume 3 - Quantum Mechanics: Non-Relativistic Theory. Edited by Pitaevskiĭ L. P. Translated by J. B Sykes and J. S Bell, Third edition, revised and enlarged ed., Pergamon Press, 1977. ISBN 0080291406.
Peres, Asher (1993). Quantum Theory: Concepts and Methods. Kluwer. ISBN 0-7923-2549-4. OCLC 28854083.
Müller-Kirsten, Harald J.W. (2012). Introduction to Quantum Mechanics: Schrödinger Equation and Path Integral (2nd ed.). World Scientific. ISBN 9789814397735.
Sakurai, J. J.; Napolitano, Jim (2017). Modern Quantum Mechanics (2nd ed.). Cambridge University Press. ISBN 978-1-108-42241-3.
Leonard I. Schiff (1968) Quantum Mechanics McGraw-Hill Education
Davydov A.S. (1965) Quantum Mechanics Pergamon ISBN 9781483172026
Shankar, Ramamurti (2011). Principles of Quantum Mechanics (2nd ed.). Plenum Press. ISBN 978-0306447907.
von Neumann, John (2018). Nicholas A. Wheeler (ed.). Mathematical Foundations of Quantum Mechanics. Translated by Robert T. Beyer. Princeton University Press. ISBN 9781400889921.
=== Relativistic quantum mechanics and quantum field theory ===
Bjorken, S. Drell, James; Drell, Sidney (1964). Relativistic Quantum Mechanics. McGraw-Hill. ISBN 0-07-005493-2. {{cite book}}: ISBN / Date incompatibility (help)
Griffiths, David (2020-12-10). Introduction to Elementary Particles. John Wiley & Sons. ISBN 978-3-527-83464-8.
Peskin, Michael Edward; Schroeder, Daniel V. (1995). An Introduction to Quantum Field Theory. Reading: Addison-Wesley.
Schwartz, Matthew (2014). Quantum Field Theory and the Standard Model. Cambridge University Press. ISBN 978-1-107-03473-0.
Zee, Anthony (2003). Quantum Field Theory in a Nutshell. Princeton, N.J.: Princeton University Press. ISBN 9780691010199. OCLC 50479292.
=== Both quantum and classical mechanics ===
Byron, Frederick W.; Fuller, Robert W. (1992). Mathematics of Classical and Quantum Physics (Revised ed.). Dover Publications. ISBN 978-0486671642.
Sears, Francis; Zemansky, Mark; Young, Hugh; Freedman, Roger (2019). University Physics with Modern Physics (15th ed.). Pearson. ISBN 978-0-135-15955-2.
Thorne, Kip S.; Blandford, Roger D. (2017). Modern Classical Physics: Optics, Fluids, Plasmas, Elasticity, Relativity, and Statistical Physics. Princeton University Press. ISBN 978-0691159027.
Weinstock, Robert (1974). Calculus of Variations with Applications to Physics and Engineering. Dover Publications. ISBN 978-0486630694.
== See also ==
List of textbooks in thermodynamics and statistical mechanics
List of textbooks in electromagnetism
List of books on general relativity
Teaching quantum mechanics
== External links ==
A Physics Book List. John Baez. Department of Mathematics, University of California, Riverside. 19931997.

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This is the List of words having different meanings in British and American English: AL. For the second portion of the list, see List of words having different meanings in American and British English: MZ.
Asterisked (*) meanings, though found chiefly in the specified region, also have some currency in the other region; other definitions may be viewed by the other as Briticisms or Americanisms respectively. Additional usage notes are provided where useful.
== A ==
== B ==
== C ==
== D ==
== E ==
== F ==
== G ==
== H ==
== I ==
== J ==
== K ==
== L ==
== See also ==
List of words having different meanings in British and American English: MZ
List of American words not widely used in the United Kingdom
List of British words not widely used in the United States
== References ==
== Further reading ==
Note: the below are general references on this topic. Individual entries have not yet been audited against the references below and readers looking for verifiable information should consult the works below unless individual entries in the article's table are properly sourced.
Bickerton, Anthea (1985). American-English, English-American : a two-way glossary of words in daily use on both sides of the Atlantic. Abson. ISBN 978-0-902920-60-6.
Davies, Christopher (2005). Divided by a Common Language: A Guide to British and American English. Houghton Mifflin. ISBN 978-0-618-00275-7.
Hargraves, Orin (2003). Mighty Fine Words and Smashing Expressions: Making Sense of Transatlantic English. Oxford University Press. ISBN 978-0-19-515704-8.
== External links ==
The Septic's Companion: A British Slang Dictionary an online dictionary of British slang, viewable alphabetically or by category

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title: "List of works by Nikolay Bogolyubov"
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List of some published works of Nikolay Bogolyubov in chronological order:
== 1924 ==
N. N. Bogolyubov (1924). On the behavior of solutions of linear differential equations at infinity (Russian: О поведении решений линейных дифференциальных уравнений на бесконечности).
== 1934 ==
N. M. Krylov and N. N. Bogolyubov (1934). On various formal expansions of non-linear mechanics (in Ukrainian). Kiev: Izdat. Zagal'noukr. Akad. Nauk.
== 1937 ==
N. N. Bogoliubov and N. M. Krylov (1937). "La theorie generalie de la mesure dans son application a l'etude de systemes dynamiques de la mecanique non-lineaire" (in French). Ann. Math. II 38: 65113. Zbl. 16.86.
== 1945 ==
Боголюбов Н. Н. (1945). О некоторых статистических методах в математической физике (in Russian). Киев: Изд-во АН УССР.
N. N. Bogoliubov (1945). On Some Statistical Methods in Mathematical Physics (in Russian). Kyiv: Izdatelstvo AN USSR.
== 1946 ==
N. N. Bogoliubov (1946). "Kinetic Equations" (in Russian). Journal of Experimental and Theoretical Physics 16 (8): 691702.
N. N. Bogoliubov (1946). "Kinetic Equations" (in English). Journal of Physics 10 (3): 265274.
== 1947 ==
N. N. Bogoliubov, K. P. Gurov (1947). "Kinetic Equations in Quantum Mechanics" (in Russian). Journal of Experimental and Theoretical Physics 17 (7): 614628.
N. N. Bogoliubov (1947). "К теории сверхтекучести" (in Russian). Известия АН СССР, физика, 1947, 11, № 1, 77.
N. N. Bogoliubov (1947). "On the Theory of Superfluidity" (in English). Journal of Physics 11 (1): 2332.
== 1948 ==
N. N. Bogoliubov (1948). "Equations of Hydrodynamics in Statistical Mechanics" (in Ukrainian). Sbornik Trudov Instituta Matematiki AN USSR 10: 41—59.
== 1949 ==
Боголюбов М. М. (1949). Лекціï з квантовоï статистики. Питання статистичноï механіки квантових систем. (in Ukrainian). Киïв.{{cite book}}: CS1 maint: location missing publisher (link)
N. N. Bogoliubov (1967—1970): Lectures on Quantum Statistics. Problems of Statistical Mechanics of Quantum Systems. New York, Gordon and Breach.
== 1955 ==
Bogoliubov, N. N.; Ostap S. Parasyuk (1955). Теория умножения причинных исключительных функций [A theory of multiplication of causative singular functions]. Doklady Akademii Nauk SSSR (in Russian). 100: 2528.
Bogoliubov, N. N.; Shirkov D. V. (1955). Группа мультипликативной ренормировки в квантовой теории поля [Multiplicative renormalization group in quantum field theory]. JETP (in Russian). 30: 7786.
== 1957 ==
Боголюбов Н. Н.; Ширков Д. В. (1957). Введение в теорию квантованных полей (in Russian). М.: Наука.
N. N. Bogoliubov; D. V. Shirkov (1957). Introduction to the Theory of Quantized Field (in Russian). Moscow: Nauka.
N. N. Bogoliubov; D. V. Shirkov (1959). Introduction to the Theory of Quantized Field. John Wiley & Sons Inc. ISBN 0-470-08613-0. {{cite book}}: ISBN / Date incompatibility (help) (1st edition)
N. N. Bogoliubov; D. V. Shirkov (1980). Introduction to the Theory of Quantized Field. John Wiley & Sons Inc. ISBN 0-471-04223-4. (3rd edition)
N. N. Bogoliubov, O. S. Parasyuk (1957). "Uber die Multiplikation der Kausalfunktionen in der Quantentheorie der Felder" (in German). Acta Mathematica 97: 227266. doi:10.1007/BF02392399.
== 1958 ==
N. N. Bogoliubov (1958). On a New Method in the Theory of Superconductivity. Journal of Experimental and Theoretical Physics 34 (1): 58.
Боголюбов Н. Н.; Медведев Б. В.; Поливанов М. К. (1958). Вопросы теории дисперсионных соотношений (in Russian). М.: Физматгиз.
N. N. Bogoliubov; B. V. Medvedev; M. K. Polivanov (1958). Problems in the Theory of Dispersion Relations. Princeton: Institute for Advanced Study.
== 1965 ==
N. N. Bogolubov, B. V. Struminsky, A. N. Tavkhelidze (1965). On composite models in the theory of elementary particles. JINR Preprint D-1968, Dubna.
== External links ==
Complete list

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This is a list of lists of countries and territories by official language.
List of countries and territories where Afrikaans or Dutch are official languages
List of countries and territories where Arabic is an official language
List of countries and territories where Chinese is an official language
List of countries and territories where English is an official language
List of countries and territories where French is an official language
List of countries and territories where German is an official language
List of countries and territories where Persian is an official language
List of countries and territories where Romanian is an official language
List of countries and territories where Russian is an official language
List of countries and territories where Spanish is an official language
List of countries and territories where Tamil is an official language
== Other official languages ==
=== Greek ===
=== Hindustani ===
=== Italian ===
=== Malay ===
=== Portuguese ===
=== Turkish ===
== See also ==
List of official languages by country and territory
De facto
== References ==

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title: "Lists of mathematics topics"
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Lists of mathematics topics cover a variety of topics related to mathematics. Some of these lists link to hundreds of articles; some link to only a few. The template below includes links to alphabetical lists of all mathematical articles. This article brings together the same content organized in a manner better suited for browsing.
Lists cover aspects of basic and advanced mathematics, methodology, mathematical statements, integrals, general concepts, mathematical objects, and reference tables.
They also cover equations named after people, societies, mathematicians, journals, and meta-lists.
The purpose of this list is not similar to that of the Mathematics Subject Classification formulated by the American Mathematical Society. Many mathematics journals ask authors of research papers and expository articles to list subject codes from the Mathematics Subject Classification in their papers. The subject codes so listed are used by the two major reviewing databases, Mathematical Reviews and Zentralblatt MATH. This list has some items that would not fit in such a classification, such as list of exponential topics and list of factorial and binomial topics, which may surprise the reader with the diversity of their coverage.
== Basic mathematics ==
This branch is typically taught in secondary education or in the first year of university.
Outline of arithmetic
Outline of discrete mathematics
List of calculus topics
List of geometry topics
Outline of geometry
List of trigonometry topics
Outline of trigonometry
List of trigonometric identities
List of logarithmic identities
List of integrals of logarithmic functions
List of set identities and relations
List of topics in logic
== Areas of advanced mathematics ==
As a rough guide, this list is divided into pure and applied sections although in reality, these branches are overlapping and intertwined.
=== Pure mathematics ===
==== Algebra ====
Algebra includes the study of algebraic structures, which are sets and operations defined on these sets satisfying certain axioms. The field of algebra is further divided according to which structure is studied; for instance, group theory concerns an algebraic structure called group.
Outline of algebra
Glossary of field theory
Glossary of ring theory
List of abstract algebra topics
List of algebraic structures
List of Boolean algebra topics
List of category theory topics
List of cohomology theories
List of commutative algebra topics
List of homological algebra topics
List of group theory topics
Glossary of group theory
List of representation theory topics
List of linear algebra topics
Glossary of linear algebra
List of reciprocity laws
==== Calculus and analysis ====
Calculus studies the computation of limits, derivatives, and integrals of functions of real numbers, and in particular studies instantaneous rates of change. Analysis evolved from calculus.
Outline of calculus
Glossary of tensor theory
List of complex analysis topics
List of functional analysis topics
List of vector spaces in mathematics
List of integration and measure theory topics
List of harmonic analysis topics
List of Fourier analysis topics
List of mathematical series
List of multivariable calculus topics
List of q-analogs
List of real analysis topics
List of variational topics
See also Dynamical systems and differential equations section below.
==== Geometry and topology ====
Geometry is initially the study of spatial figures like circles and cubes, though it has been generalized considerably. Topology developed from geometry; it looks at those properties that do not change even when the figures are deformed by stretching and bending, like dimension.
Outline of geometry
Glossary of differential geometry and topology
Glossary of Riemannian and metric geometry
Glossary of scheme theory
List of algebraic geometry topics
List of complex and algebraic surfaces
List of circle topics
List of topics related to π
List of curves topics
List of differential geometry topics
List of geometric shapes
List of knot theory topics
List of Lie groups topics
List of mathematical properties of points
List of triangle topics
List of topology topics
List of general topology topics
Glossary of general topology
List of topologies
Topological property
List of algebraic topology topics
List of cohomology theories
List of geometric topology topics
==== Combinatorics ====
Combinatorics concerns the study of discrete (and usually finite) objects. Aspects include "counting" the objects satisfying certain criteria (enumerative combinatorics), deciding when the criteria can be met, and constructing and analyzing objects meeting the criteria (as in combinatorial designs and matroid theory), finding "largest", "smallest", or "optimal" objects (extremal combinatorics and combinatorial optimization), and finding algebraic structures these objects may have (algebraic combinatorics).
Outline of combinatorics
Glossary of graph theory
List of graph theory topics
==== Logic ====
Logic is the foundation that underlies mathematical logic and the rest of mathematics. It tries to formalize valid reasoning. In particular, it attempts to define what constitutes a proof.
Outline of logic
List of Boolean algebra topics
List of first-order theories
List of large cardinal properties
List of mathematical logic topics
List of set theory topics
Glossary of order theory
==== Number theory ====
The branch of mathematics deals with the properties and relationships of numbers, especially positive integers.
Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions. German mathematician Carl Friedrich Gauss said, "Mathematics is the queen of the sciences—and number theory is the queen of mathematics."
Number theory also studies the natural, or whole, numbers. One of the central concepts in number theory is that of the prime number, and there are many questions about primes that appear simple but whose resolution continues to elude mathematicians.
List of number theory topics
List of algebraic number theory topics
List of recreational number theory topics
Glossary of arithmetic and Diophantine geometry
List of prime numbers—not just a table, but a list of various kinds of prime numbers (each with an accompanying table)
List of zeta functions
=== Applied mathematics ===
==== Dynamical systems and differential equations ====

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A differential equation is an equation involving an unknown function and its derivatives.
In a dynamical system, a fixed rule describes the time dependence of a point in a geometrical space. The mathematical models used to describe the swinging of a clock pendulum, the flow of water in a pipe, or the number of fish each spring in a lake are examples of dynamical systems.
List of dynamical systems and differential equations topics
List of nonlinear partial differential equations
List of partial differential equation topics
==== Mathematical physics ====
Mathematical physics is concerned with "the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and for the formulation of physical theories".1
List of mathematical topics in classical mechanics
List of mathematical topics in quantum theory
List of mathematical topics in relativity
List of string theory topics
Index of wave articles
==== Theory of computation ====
The fields of mathematics and computing intersect both in computer science, the study of algorithms and data structures, and in scientific computing, the study of algorithmic methods for solving problems in mathematics, science, and engineering.
List of algorithm general topics
List of computability and complexity topics
Lists for computational topics in geometry and graphics
List of combinatorial computational geometry topics
List of computer graphics and descriptive geometry topics
List of numerical computational geometry topics
List of computer vision topics
List of formal language and literal string topics
List of numerical analysis topics
List of terms relating to algorithms and data structures
==== Information theory and signal processing ====
Information theory is a branch of applied mathematics and social science involving the quantification of information. Historically, information theory was developed to find fundamental limits on compressing and reliably communicating data.
Signal processing is the analysis, interpretation, and manipulation of signals. Signals of interest include sound, images, biological signals such as ECG, radar signals, and many others. Processing of such signals includes filtering, storage and reconstruction, separation of information from noise, compression, and feature extraction.
List of algebraic coding theory topics
List of information theory topics
List of cryptography topics
==== Probability and statistics ====
Probability theory is the formalization and study of the mathematics of uncertain events or knowledge. The related field of mathematical statistics develops statistical theory with mathematics. Statistics, the science concerned with collecting and analyzing data, is an autonomous discipline (and not a subdiscipline of applied mathematics).
Lists of statistics topics
Catalog of articles in probability theory
List of probability topics
List of stochastic processes topics
List of probability distributions
List of statistics articles
Outline of regression analysis
==== Game theory ====
Game theory is a branch of mathematics that uses models to study interactions with formalized incentive structures ("games"). It has applications in a variety of fields, including economics, anthropology, political science, social psychology and military strategy.
Glossary of game theory
List of games in game theory
==== Operations research ====
Operations research is the study and use of mathematical models, statistics, and algorithms to aid in decision-making, typically with the goal of improving or optimizing the performance of real-world systems.
List of knapsack problems
List of network theory topics
== Methodology ==
List of graphical methods
List of mathematics-based methods
List of rules of inference
== Mathematical statements ==
A mathematical statement amounts to a proposition or assertion of some mathematical fact, formula, or construction. Such statements include axioms and the theorems that may be proved from them, conjectures that may be unproven or even unprovable, and also algorithms for computing the answers to questions that can be expressed mathematically.
List of algorithms
List of axioms
List of conjectures
List of conjectures by Paul Erdős
Combinatorial principles
List of equations
List of formulae involving pi
List of representations of e
List of inequalities
List of lemmas
List of mathematical identities
List of mathematical proofs
List of theorems
== General concepts ==
List of convexity topics
List of dualities
List of exceptional set concepts
List of exponential topics
List of factorial and binomial topics
List of fractal topics
List of logarithm topics
List of mathematical properties of points
List of numeral system topics
List of order topics
List of partition topics
List of permutation topics
List of polynomial topics
List of properties of sets of reals
List of transforms
== Mathematical objects ==
Among mathematical objects are numbers, functions, sets, a great variety of things called "spaces" of one kind or another, algebraic structures such as rings, groups, or fields, and many other things.
List of mathematical examples
List of algebraic surfaces
List of curves
List of complex reflection groups
List of complexity classes
List of examples in general topology
List of finite simple groups
List of Fourier-related transforms
List of manifolds
List of mathematical constants
List of mathematical functions
List of mathematical knots and links
List of mathematical shapes
List of mathematical spaces
List of matrices
List of numbers
List of polygons, polyhedra and polytopes
List of regular polytopes
List of simple Lie groups
List of small groups
List of special functions and eponyms
List of surfaces
Table of Lie groups
== Equations named after people ==
Scientific equations named after people
== About mathematics ==
List of letters used in mathematics and science
List of mathematical societies
List of mathematics competitions
List of mathematics history topics
List of publications in mathematics
List of mathematics journals
=== Mathematicians ===
Mathematicians study and research in all the different areas of mathematics. The publication of new discoveries in mathematics continues at an immense rate in hundreds of scientific journals, many of them devoted to mathematics and many devoted to subjects to which mathematics is applied (such as theoretical computer science and theoretical physics).
List of films about mathematicians
List of game theorists
List of geometers
List of logicians
List of mathematicians
List of mathematical probabilists
List of statisticians
=== Work of particular mathematicians ===

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List of things named after Niels Henrik Abel
List of things named after George Airy
List of things named after Jean d'Alembert
List of things named after Archimedes
List of things named after Vladimir Arnold
List of things named after Emil Artin
List of things named after Stefan Banach
List of things named after Thomas Bayes
List of things named after members of the Bernoulli family
List of things named after Jakob Bernoulli
List of things named after Friedrich Bessel
List of things named after Élie Cartan
List of things named after Augustin-Louis Cauchy
List of things named after Arthur Cayley
List of things named after Pafnuty Chebyshev
List of things named after John Horton Conway
List of things named after Richard Dedekind
List of things named after Pierre Deligne
List of things named after Peter Gustav Lejeune Dirichlet
List of things named after Albert Einstein
List of things named after Euclid
List of things named after Leonhard Euler
List of things named after Paul Erdős
List of things named after Pierre de Fermat
List of things named after Fibonacci
List of things named after Joseph Fourier
List of things named after Erik Fredholm
List of things named after Ferdinand Georg Frobenius
List of things named after Carl Friedrich Gauss
List of things named after Évariste Galois
List of things named after Hermann Grassmann
List of things named after Alexander Grothendieck
List of things named after Jacques Hadamard
List of things named after William Rowan Hamilton
List of things named after Erich Hecke
List of things named after Eduard Heine
List of things named after Charles Hermite
List of things named after David Hilbert
List of things named after W. V. D. Hodge
List of things named after Carl Gustav Jacob Jacobi
List of things named after Johannes Kepler
List of things named after Felix Klein
List of things named after Joseph-Louis Lagrange
List of things named after Johann Lambert
List of things named after Pierre-Simon Laplace
List of things named after Adrien-Marie Legendre
List of things named after Gottfried Leibniz
List of things named after Sophus Lie
List of things named after Joseph Liouville
List of things named after Andrey Markov
List of things named after John Milnor
List of things named after Hermann Minkowski
List of things named after John von Neumann
List of things named after Isaac Newton
List of things named after Emmy Noether
List of things named after Henri Poincaré
List of things named after Siméon Denis Poisson
List of things named after Pythagoras
List of things named after Srinivasa Ramanujan
List of things named after Bernhard Riemann
List of things named after Issai Schur
List of things named after Anatoliy Skorokhod
List of things named after George Gabriel Stokes
List of things named after Jean-Pierre Serre
List of things named after James Joseph Sylvester
List of things named after Alfred Tarski
List of things named after Alan Turing
List of things named after Stanislaw Ulam
List of things named after Karl Weierstrass
List of things named after André Weil
List of things named after Hermann Weyl
List of things named after Norbert Wiener
List of things named after Ernst Witt
== Reference tables ==
List of mathematical reference tables
List of moments of inertia
Table of derivatives
=== Integrals ===
In calculus, the integral of a function is a generalization of area, mass, volume, sum, and total. The following pages list the integrals of many different functions.
Lists of integrals
List of integrals of exponential functions
List of integrals of hyperbolic functions
List of integrals of inverse hyperbolic functions
List of integrals of inverse trigonometric functions
List of integrals of irrational functions
List of integrals of logarithmic functions
List of integrals of rational functions
List of integrals of trigonometric functions
== Journals ==
List of mathematics journals
List of mathematics education journals
Category:History of science journals
Category:Philosophy of science literature
== Meta-lists ==
Glossary of mathematical symbols
List of important publications in mathematics
List of important publications in statistics
List of mathematical theories
List of mathematics categories
List of mathematical symbols by subject
Table of logic symbols
Table of mathematical symbols
== See also ==
Areas of mathematics
Computational mathematics
Glossary of areas of mathematics
Outline of mathematics
Timeline of women in mathematics
== Others ==
Lists of unsolved problems in mathematics
List of order theory topics
List of topics related to π
== Notes ==
^Note 1: Definition from the Journal of Mathematical Physics [1].
== External links and references ==
2000 Mathematics Subject Classification from the American Mathematical Society, scheme authors find many mathematics research journals asking them to use to classify their submissions; those published then include these classifications.
The Mathematical Atlas
Maths Formula
PlanetMath
Paul's Online Notes
ProofWiki
The Encyclopedia of Mathematics

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The following outline is provided as an overview of and topical guide to algebra:
Algebra is a branch of mathematics that deals with abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.
Elementary algebra is the main form of algebra taught in schools. It examines mathematical statements using variables for unspecified values and seeks to determine for which values the statements are true. To do so, it uses different methods of transforming equations to isolate variables. Linear algebra is a closely related field that investigates linear equations and combinations of them called systems of linear equations. It provides methods to find the values that solve all equations in the system at the same time, and to study the set of these solutions.
== Branches ==
Pre-algebra
Elementary algebra
Boolean algebra
Abstract algebra
Linear algebra
Universal algebra
== Algebraic equations ==
An algebraic equation is an equation involving only algebraic expressions in the unknowns. These are further classified by degree.
Linear equation algebraic equation of degree one.
Polynomial equation equation in which a polynomial is set equal to another polynomial.
Transcendental equation equation involving a transcendental function of one of its variables.
Functional equation equation in which the unknowns are functions rather than simple quantities.
Differential equation equation involving derivatives.
Integral equation equation involving integrals.
Diophantine equation equation where the only solutions of interest of the unknowns are the integer ones.
== History ==
History of algebra
== General algebra concepts ==
Fundamental theorem of algebra states that every non-constant single-variable polynomial with complex coefficients has at least one complex root. This includes polynomials with real coefficients, since every real number is a complex number with an imaginary part equal to zero.
Equations equality of two mathematical expressions
Linear equation an algebraic equation with a degree of one
Quadratic equation an algebraic equation with a degree of two
Cubic equation an algebraic equation with a degree of three
Quartic equation an algebraic equation with a degree of four
Quintic equation an algebraic equation with a degree of five
Polynomial an algebraic expression consisting of variables and coefficients
Inequalities a comparison between values
Functions mapping that associates a single output value with each input value
Sequences ordered list of elements either finite or infinite
Systems of equations finite set of equations
Vectors element of a vector space
Matrix two dimensional array of numbers
Vector space basic algebraic structure of linear algebra
Field algebraic structure with addition, multiplication and division
Groups algebraic structure with a single binary operation
Rings algebraic structure with addition and multiplication
== See also ==
Table of mathematical symbols
== External links ==
'4000 Years of Algebra' Archived 4 October 2007 at the Wayback Machine, lecture by Robin Wilson, at Gresham College, 17 October 2007 (available for MP3 and MP4 download, as well as a text file).
ExampleProblems.com Archived 8 September 2020 at the Wayback Machine Example problems and solutions from basic Archived 6 November 2020 at the Wayback Machine and abstract Archived 6 November 2020 at the Wayback Machine algebra.

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In mathematics, many types of algebraic structures are studied. Abstract algebra is primarily the study of specific algebraic structures and their properties. Algebraic structures may be viewed in different ways, however the common starting point of algebra texts is that an algebraic object incorporates one or more sets with one or more binary operations or unary operations satisfying a collection of axioms.
Another branch of mathematics known as universal algebra studies algebraic structures in general. From the universal algebra viewpoint, most structures can be divided into varieties and quasivarieties depending on the axioms used. Some axiomatic formal systems that are neither varieties nor quasivarieties, called nonvarieties, are sometimes included among the algebraic structures by tradition.
Concrete examples of each structure will be found in the articles listed.
Algebraic structures are so numerous today that this article will inevitably be incomplete. In addition to this, there are sometimes multiple names for the same structure, and sometimes one name will be defined by disagreeing axioms by different authors. Most structures appearing on this page will be common ones which most authors agree on. Other web lists of algebraic structures, organized more or less alphabetically, include Jipsen and PlanetMath Archived 2007-11-13 at the Wayback Machine. These lists mention many structures not included below, and may present more information about some structures than is presented here.
== Study of algebraic structures ==
Algebraic structures appear in most branches of mathematics, and one can encounter them in many different ways.
Beginning study: In American universities, groups, vector spaces and fields are generally the first structures encountered in subjects such as linear algebra. They are usually introduced as sets with certain axioms.
Advanced study:
Abstract algebra studies properties of specific algebraic structures.
Universal algebra studies algebraic structures abstractly, rather than specific types of structures.
Varieties
Category theory studies interrelationships between different structures, algebraic and non-algebraic. To study a non-algebraic object, it is often useful to use category theory to relate the object to an algebraic structure.
Example: The fundamental group of a topological space gives information about the topological space.
== Types of algebraic structures ==
In full generality, an algebraic structure may use any number of sets and any number of axioms in its definition. The most commonly studied structures, however, usually involve only one or two sets and one or two binary operations. The structures below are organized by how many sets are involved, and how many binary operations are used. Increased indentation is meant to indicate a more exotic structure, and the least indented levels are the most basic.
=== One set with no binary operations ===
Set: a degenerate algebraic structure S having no operations.
Pointed set: S has one or more distinguished elements, often 0, 1, or both.
Unary system: S and a single unary operation over S.
Pointed unary system: a unary system with S a pointed set.
=== One binary operation on one set ===
The following group-like structures consist of a set with a binary operation. The binary operation can be indicated by any symbol, or with no symbol (juxtaposition). The most common structure is that of a group. Other structures involve weakening or strengthening the axioms for groups, and may additionally use unary operations.
Magma or groupoid: S and a single binary operation over S.
Semigroup: an associative magma.
Monoid: a semigroup with identity element.
Group: a monoid with a unary operation (inverse), giving rise to inverse elements.
Abelian group: a group whose binary operation is commutative.
Quasigroup: a magma obeying the Latin square property. A quasigroup may also be represented using three binary operations.
Loop: a quasigroup with identity.
Semilattice: a semigroup whose operation is idempotent and commutative. The binary operation can be called either meet or join. This is basically "half" of a lattice structure (see below).
=== Two binary operations on one set ===
The main types of structures with one set having two binary operations are ring-like or ringoids and lattice-like or simply lattices. Ringoids and lattices can be clearly distinguished despite both having two defining binary operations. In the case of ringoids, the two operations are linked by the distributive law; in the case of lattices, they are linked by the absorption law. Ringoids also tend to have numerical models, while lattices tend to have set-theoretic models.
In ring-like structures or ringoids, the two binary operations are often called addition and multiplication, with multiplication linked to addition by the distributive law.

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Semiring: a ringoid such that S is a monoid under each operation. Addition is typically assumed to be commutative and associative, and the monoid product is assumed to distribute over the addition on both sides, and the additive identity 0 is an absorbing element in the sense that 0 x = 0 for all x.
Near-ring: a semiring whose additive monoid is a (not necessarily abelian) group.
Ring: a semiring whose additive monoid is an abelian group.
Commutative ring: a ring in which the multiplication operation is commutative.
Division ring: a nontrivial ring in which division by nonzero elements is defined.
Integral domain: A nontrivial commutative ring in which the product of any two nonzero elements is nonzero.
Field: a commutative division ring (i.e. a commutative ring which contains a multiplicative inverse for every nonzero element).
Nonassociative rings: These are like rings, but the multiplication operation need not be associative.
Lie ring: a ringoid whose additive monoid is an abelian group, but whose multiplicative operation satisfies the Jacobi identity rather than associativity.
Jordan ring: a commutative nonassociative ring that respects the Jordan identity
Boolean ring: a commutative ring with idempotent multiplication operation.
Kleene algebras: a semiring with idempotent addition and a unary operation, the Kleene star, satisfying additional properties.
*-algebra or *-ring: a ring with an additional unary operation (*) known as an involution, satisfying additional properties.
Arithmetic: addition and multiplication on an infinite set, with an additional pointed unary structure. The unary operation is injective successor, and has distinguished element 0.
Robinson arithmetic. Addition and multiplication are recursively defined by means of successor. 0 is the identity element for addition, and annihilates multiplication. Robinson arithmetic is listed here even though it is a variety, because of its closeness to Peano arithmetic.
Peano arithmetic. Robinson arithmetic with an axiom schema of induction. Most ring and field axioms bearing on the properties of addition and multiplication are theorems of Peano arithmetic or of proper extensions thereof.
Lattice-like structures have two binary operations called meet and join, connected by the absorption law.
Latticoid: meet and join commute but need not associate.
Skew lattice: meet and join associate but need not commute.
Lattice: meet and join associate and commute.
Complete lattice: a lattice in which arbitrary meet and joins exist.
Bounded lattice: a lattice with a greatest element and least element.
Complemented lattice: a bounded lattice with a unary operation, complementation, denoted by postfix ⊥. The join of an element with its complement is the greatest element, and the meet of the two elements is the least element.
Modular lattice: a lattice whose elements satisfy the additional modular identity.
Distributive lattice: a lattice in which each of meet and join distributes over the other. Distributive lattices are modular, but the converse does not hold.
Boolean algebra: a complemented distributive lattice. Either of meet or join can be defined in terms of the other and complementation. This can be shown to be equivalent with the ring-like structure of the same name above.
Heyting algebra: a bounded distributive lattice with an added binary operation, relative pseudo-complement, denoted by the infix operator →, and governed by the axioms:
x → x = 1
x (x → y) = x y
y (x → y) = y
x → (y z) = (x → y) (x → z)
=== Module-like structures on two sets ===
The following module-like structures have the common feature of having two sets, A and B, so that there is a binary operation from A×A into A and another operation from A×B into A. Modules, counting the ring operations, have at least three binary operations.
Group with operators: a group G with a set Ω and a binary operation Ω × G → G satisfying certain axioms.
Module: an abelian group M and a ring R acting as operators on M. Usually M is defined as "over R". The members of R are sometimes called scalars, and the binary operation of scalar multiplication is a function R × M → M, which satisfies several axioms.
Vector spaces: A module where the ring R is a division ring or a field.
Graded vector spaces: Vector spaces which are equipped with a direct sum decomposition into subspaces or "grades".
Quadratic space: a vector space V over a field F with a quadratic form on V taking values in F.
Other special types of modules, including free modules, projective modules, injective modules and flat modules are studied in abstract algebra.
=== Algebra-like structures on two sets ===
These structures are defined over two sets, a ring R and an R-module M equipped with an operation called multiplication. This can be viewed as a system with five binary operations: two operations on R, two on M and one involving both R and M. Many of these structures are hybrid structures of the previously mentioned ones.

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Algebra over a ring (also R-algebra): a module over a commutative ring R, which also carries a multiplication operation that is compatible with the module structure. This includes distributivity over addition and linearity with respect to multiplication by elements of R.
Algebra over a field: This is a ring which is also a vector space over a field. Multiplication is usually assumed to be associative. The theory is especially well developed.
Associative algebra: an algebra over a ring such that the multiplication is associative.
Nonassociative algebra: a module over a commutative ring, equipped with a ring multiplication operation that is not necessarily associative. Often associativity is replaced with a different identity, such as alternation, the Jacobi identity, or the Jordan identity.
Lie algebra: a special type of nonassociative algebra whose product satisfies the Jacobi identity.
Jordan algebra: a special type of nonassociative algebra whose product satisfies the Jordan identity.
Coalgebra: a vector space with a "comultiplication" defined dually to that of associative algebras.
Lie coalgebra: a vector space with a "comultiplication" defined dually to that of Lie algebras.
Graded algebra: a graded vector space with an algebra structure compatible with the grading. The idea is that if the grades of two elements a and b are known, then the grade of ab is known, and so the location of the product ab is determined in the decomposition.
Inner product space: an F-vector space V with a definite bilinear form V × V → F.
Bialgebra: an associative algebra with a compatible coalgebra structure.
Lie bialgebra: a Lie algebra with a compatible bialgebra structure.
Hopf algebra: a bialgebra with a connection axiom (antipode).
Clifford algebra: an associative
Z
2
{\displaystyle \mathbb {Z} _{2}}
-graded algebra additionally equipped with an exterior product from which several possible inner products may be derived. Exterior algebras and geometric algebras are special cases of this construction.
== Algebraic structures with additional non-algebraic structure ==
There are many examples of mathematical structures where algebraic structure exists alongside non-algebraic structure.
Topological vector spaces are vector spaces with a compatible topology.
Lie groups: These are topological manifolds that also carry a compatible group structure.
Ordered groups, ordered rings and ordered fields have algebraic structure compatible with an order on the set.
Von Neumann algebras: these are *-algebras on a Hilbert space which are equipped with the weak operator topology.
== Algebraic structures in different disciplines ==
Some algebraic structures find uses in disciplines outside of abstract algebra. The following is meant to demonstrate some specific applications in other fields.
In physics:
Lie groups are used extensively in physics. A few well-known ones include the orthogonal groups and the unitary groups.
Lie algebras
Inner product spaces
KacMoody algebra
The quaternions and more generally geometric algebras
In mathematical logic:
Boolean algebras are both rings and lattices, under their two operations.
Heyting algebras are a special example of boolean algebras.
Peano arithmetic
Boundary algebra
MV-algebra
In computer science:
Max-plus algebra
Syntactic monoid
Transition monoid
== See also ==
== References ==
== External links ==
Jipsen:
Alphabetical list of algebra structures; includes many not mentioned here.
Online books and lecture notes.
Map containing about 50 structures, some of which do not appear above. Likewise, most of the structures above are absent from this map.
PlanetMath Archived 2007-11-13 at the Wayback Machine topic index.
Hazewinkel, Michiel (2001) Encyclopaedia of Mathematics. Springer-Verlag.
Mathworld page on abstract algebra.
Stanford Encyclopedia of Philosophy: Algebra by Vaughan Pratt.

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The following outline is provided as an overview of and topical guide to arithmetic:
Arithmetic is an elementary branch of mathematics that deals with numerical operations like addition, subtraction, multiplication, and division. In a wider sense, it also includes exponentiation, extraction of roots, and taking logarithms, and the use of such operations to perform more complicated calculations.
Arithmetic is fundamental for both pure mathematics and its practical application to science and daily life. In pure mathematics, arithmetic is defined formally for various types of numbers, such as integers, fractions of integers (rational numbers), and real numbers. In practical application, arithmetic is usually approximate, operating on decimal or binary numbers, with rounding.
== Essence of arithmetic ==
Elementary arithmetic
Decimal arithmetic
Decimal point
Numeral
Place value
== History of arithmetic ==
== Arithmetic operations and related concepts ==
Order of operations
Addition
Summation Answer after adding a sequence of numbers
Additive inverse
Subtraction Taking away numbers
Multiplication Repeated addition
Multiple Product of multiplication
Least common multiple
Multiplicative inverse
Division Repeated subtraction
Modulo The remainder of division
Quotient Result of division
Quotition and partition How many parts are there, and what is the size of each part
Fraction A number that is not whole, often shown as a division equation
Decimal fraction Representation of a fraction in the form of a number
Proper fraction Fraction with a numerator that is less than the denominator
Improper fraction Fractions with a numerator that is any number
Ratio Showing how much one number can go into another
Least common denominator Least common multiple of two or more fractions' denominators
Factoring Breaking a number down into its products
Fundamental theorem of arithmetic
Prime number Number divisible by only 1 or itself
Prime number theorem
Distribution of primes
Composite number Number made of two smaller integers
Factor A number that can be divided from its original number to get a whole number
Greatest common factor Greatest factor that is common between two numbers
Euclid's algorithm for finding greatest common divisors
Exponentiation (power) Repeated multiplication
Square root Reversal of a power of 2 (exponent of 1/2)
Cube root Reversal of a power of 3 (exponent of 1/3)
Properties of Operations
Associative property
Distributive property
Commutative property
Factorial Multiplication of numbers from the current number to 0
== Types of numbers ==
Real number
Rational number
Integer
Natural number
Composite number
Irrational number
Odd number
Even number
Positive number
Negative number
Prime number
List of prime numbers
Highly composite number
Perfect number
Algebraic number
Transcendental number
Hypercomplex number
Transfinite number
Indefinite and fictitious numbers
== Elementary statistics ==
Mean
Weighted mean
Median
Mode
Range
== Other basic concepts ==
Combinations
Percentage
Permutations
Proportion
Rounding
Scientific notation
== Modern arithmetic ==
Computer-Based Math
Outline of number theory
Riemann zeta function
L-functions
Multiplicative functions
Modular forms
== See also ==
Elementary mathematics
Mathematical software and Computer-Based Math
Table of mathematical symbols
== External links ==
MathWorld article about arithmetic
The New Student's Reference Work/Arithmetic (historical)
Maximus Planudes' the Great Calculation Archived 2007-07-13 at the Wayback Machine an early western work on arithmetic at Convergence Archived 2007-07-13 at the Wayback Machine

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Calculus is a branch of mathematics focused on limits, functions, derivatives, integrals, and infinite series. This subject constitutes a major part of contemporary mathematics education. Calculus has widespread applications in science, economics, and engineering and can solve many problems for which algebra alone is insufficient.
== Branches of calculus ==
Differential calculus
Integral calculus
Multivariable calculus
Fractional calculus
Differential Geometry
== History of calculus ==
History of calculus
Important publications in calculus
== General calculus concepts ==
Continuous function
Derivative
Fundamental theorem of calculus
Integral
Limit
Non-standard analysis
Partial derivative
Infinite Series
== Calculus scholars ==
Sir Isaac Newton
Gottfried Leibniz
Leonhard Euler
== Calculus lists ==
List of calculus topics
== See also ==
Glossary of calculus
Table of mathematical symbols
== References ==
== External links ==
Weisstein, Eric W. "Calculus". MathWorld.
Topics on Calculus at PlanetMath.
Calculus Made Easy (1914) by Silvanus P. Thompson Full text in PDF
Calculus.org: The Calculus page at University of California, Davis contains resources and links to other sites
COW: Calculus on the Web Archived 2007-10-14 at the Wayback Machine at Temple University - contains resources ranging from pre-calculus and associated algebra
Online Integrator (WebMathematica) from Wolfram Research
The Role of Calculus in College Mathematics Archived 2021-07-26 at the Wayback Machine from ERICDigests.org
OpenCourseWare Calculus from the Massachusetts Institute of Technology
Infinitesimal Calculus an article on its historical development, in Encyclopaedia of Mathematics, Michiel Hazewinkel ed.
Calculus Concepts Master Calculus From Scratch

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The following outline is provided as an overview of and guide to category theory:
Category theory is a general theory of mathematical structures and their relations. It was introduced by Samuel Eilenberg and Saunders Mac Lane in the mid-20th century in their foundational work on algebraic topology. Category theory can be used in most areas of mathematics. In particular, many constructions of new mathematical objects from previous ones that appear similarly in several contexts are conveniently expressed and unified in terms of categories. Examples include quotient spaces, direct products, completion, and duality.
Many areas of computer science also rely on category theory, such as functional programming and semantics.
== Essence of category theory ==
Category
Functor
Natural transformation
== Branches of category theory ==
Homological algebra
Diagram chasing
Topos theory
Enriched category theory
Higher category theory
Categorical logic
Applied category theory
== Specific categories ==
Category of sets
Concrete category
Category of small categories
Category of vector spaces
Category of graded vector spaces
Category of chain complexes
Category of finite dimensional Hilbert spaces
Category of sets and relations
Category of topological spaces
Category of metric spaces
Category of preordered sets
Category of groups
Category of abelian groups
Category of rings
Category of magmas
== Objects ==
Initial object
Terminal object
Zero object
Subobject
Group object
Magma object
Natural number object
Exponential object
== Morphisms ==
Epimorphism
Monomorphism
Zero morphism
Normal morphism
Dual (category theory)
Groupoid
Image (category theory)
Coimage
Commutative diagram
Cartesian morphism
Slice category
== Functors ==
Isomorphism of categories
Natural transformation
Equivalence of categories
Subcategory
Faithful functor
Full functor
Forgetful functor
Representable functor
Functor category
Adjoint functors
Galois connection
Pontryagin duality
Affine scheme
Monad (category theory)
Comonad
Combinatorial species
Exact functor
Derived functor
Dominant functor
Enriched functor
Kan extension of a functor
Hom functor
Yoneda lemma
== Limits ==
Product (category theory)
Equaliser (mathematics)
Kernel (category theory)
Pullback (category theory)/fiber product
Inverse limit
Pro-finite group
Colimit
Coproduct
Coequalizer
Cokernel
Pushout (category theory)
Direct limit
Biproduct
Direct sum
== Additive structure ==
Preadditive category
Additive category
Pre-Abelian category
Abelian category
Exact sequence
Exact functor
Snake lemma
Nine lemma
Five lemma
Short five lemma
Mitchell's embedding theorem
Injective cogenerator
Derived category
Triangulated category
Model category
2-category
== Dagger categories ==
Dagger symmetric monoidal category
Dagger compact category
Strongly ribbon category
== Monoidal categories ==
Closed monoidal category
Braided monoidal category
Symmetric monoidal category
== Structure ==
Semigroupoid
Comma category
Localization of a category
Enriched category
Bicategory
== Topoi, toposes ==
Sheaf
Gluing axiom
Descent (category theory)
Grothendieck topology
Introduction to topos theory
Subobject classifier
Pointless topology
Heyting algebra
== History of category theory ==
History of category theory
== Persons influential in the field of category theory ==
=== Category theory scholars ===
Saunders Mac Lane
Samuel Eilenberg
Max Kelly
William Lawvere
André Joyal
== See also ==
Abstract nonsense
Glossary of category theory

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A Swadesh list () is a compilation of tentatively universal concepts for the purposes of lexicostatistics. That is, a Swadesh list is a list of forms and concepts which all languages, without exception, have terms for, such as star, hand, water, kill, sleep, and so forth. The number of such terms is small a few hundred at most, or possibly less than a hundred. The inclusion or exclusion of many terms is subject to debate among linguists; thus, there are several different lists, and some authors may refer to "Swadesh lists." The Swadesh list is named after linguist Morris Swadesh.
Translations of a Swadesh list into a set of languages allow for researchers to quantify the interrelatedness of those languages. Swadesh lists are used in lexicostatistics (the quantitative assessment of the genealogical relatedness of languages) and glottochronology (the dating of language divergence). For instance, the terms on a Swadesh list can be compared between two languages (since both languages will have them) to see if they are related and how closely, thus giving useful information that can be further applied to comparison of the languages. (Actual lexicostatistics is quite complicated, and usually sets of languages are compared.)
== Versions and authors ==
Morris Swadesh created several versions of his list. He started with a list of 215 meanings (falsely introduced as a list of 225 meanings in the paper due to a spelling error), which he reduced to 165 words for the Salish-Spokane-Kalispel language. In 1952, he published a list of 215 meanings, of which he suggested the removal of 16 for being unclear or not universal, with one added to arrive at 200 words. In 1955, he wrote, "The only solution appears to be a drastic weeding out of the list, in the realization that quality is at least as important as quantity. Even the new list has defects, but they are relatively mild and few in number." After minor corrections, the final 100-word list was published posthumously in 1971 and 1972.
Other versions of lexicostatistical test lists were published e.g. by Robert Lees (1953), John A. Rea (1958:145f), Dell Hymes (1960:6), E. Cross (1964 with 241 concepts), W. J. Samarin (1967:220f), D. Wilson (1969 with 57 meanings), Lionel Bender (1969), R. L. Oswald (1971), Winfred P. Lehmann (1984:35f), D. Ringe (1992, passim, different versions), Sergei Starostin (1984, passim, different versions), William S-Y. Wang (1994), M. Lohr (2000, 128 meanings in 18 languages). B. Kessler (2002), and many others. The Concepticon, a project hosted at the Cross-Linguistic Linked Data (CLLD) project, collects various concept lists (including classical Swadesh lists) across different linguistic areas and times, currently listing 240 different concept lists.
Frequently used and widely available on the internet, is the version by Isidore Dyen (1992, 200 meanings of 95 language variants). Since 2010, a team around Michael Dunn has tried to update and enhance that list.
== Principle ==
In origin, the words in the Swadesh lists were chosen for their universal, culturally independent availability in as many languages as possible, regardless of their stability (how prone the word is to changing, as all words do over time to a greater or lesser extent, which can include borrowing from another language).
However, stability may be important. The stability of terms on a Swadesh list under language change and the potential use of this fact for purposes of glottochronology (study of how languages develop and branch apart over time) have been analyzed by numerous authors, including Marisa Lohr 1999, 2000.
The Swadesh list was put together by Morris Swadesh on the basis of his intuition. Similar more recent lists, such as the Dolgopolsky list (1964) or the LeipzigJakarta list (2009), are based on systematic data from many different languages, but they are not yet as widely known nor as widely used as the Swadesh list.
== Usage in lexicostatistics and glottochronology ==
Lexicostatistical test lists are used in lexicostatistics to define subgroupings of languages, and in glottochronology to "provide dates for branching points in the tree." The task of defining (and counting the number) of cognate words in the list is far from trivial, and often is subject to dispute, because cognates do not necessarily look similar, and recognition of cognates presupposes knowledge of the sound laws of the respective languages.
== Swadesh 100 original final list ==
Swadesh's final list, published in 1971, contains 100 terms. Explanations of the terms can be found in Swadesh 1952 or, where noted by a dagger (†), in Swadesh 1955. Note that only this original sequence clarifies the correct meaning which is lost in an alphabetical order, e.g., in the case "27. bark" (originally without the specification here added).
^ "Claw" was only added in 1955, but again replaced by many well-known specialists with (finger)nail, because expressions for "claw" are not available in many old, extinct, or lesser known languages.
The 110-item Global Lexicostatistical Database list uses the original 100-item Swadesh list, in addition to 10 other words from the SwadeshYakhontov list.
== Swadesh 207 list ==
The most used list nowadays is the Swadesh 207-word list, adapted from Swadesh 1952.
In Wiktionary ("Swadesh lists by language"), Panlex and in Palisto's "Swadesh Word List of Indo-European languages", hundreds of Swadesh lists in this form can be found.
== Shorter lists ==
The SwadeshYakhontov list is a 35-word subset of the Swadesh list posited as especially stable by Russian linguist Sergei Yakhontov around the 1960s, although the list was only officially published in 1991. It has been used in lexicostatistics by linguists such as Sergei Starostin. With their Swadesh numbers, they are:

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Holman et al. (2008) found that in identifying the relationships between Chinese dialects the SwadeshYakhontov list was less accurate than the original Swadesh-100 list. Further they found that a different (40-word) list (also known as the ASJP list) was just as accurate as the Swadesh-100 list. However, they calculated the relative stability of the words by comparing retentions between languages in established language families. They found no statistically significant difference in the correlations in the families of the Old versus the New World.
The ranked Swadesh-100 list, with Swadesh numbers and relative stability, is as follows (Holman et al., Appendix. Asterisked words appear on the 40-word list):
=== Sign languages ===
In studying the sign languages of Vietnam and Thailand, linguist James Woodward noted that the traditional Swadesh list applied to spoken languages was unsuited for sign languages. The Swadesh list results in overestimation of the relationships between sign languages, due to indexical signs such as pronouns and parts of the body. The modified list is as follows, in mostly alphabetical order:
== See also ==
Other lists
A General Service List of English Words — roughly 2,000 of the most common English words
Dolgopolsky list — the 15 words that change least as languages evolve
LeipzigJakarta list — 100 words resistant to borrowing, used to estimate chronological separation of languages, intended to improve on the Swadesh list
Holle lists — about 1500 words in more than 250 languages of Indonesia
Wiktionary listings:
wikt:Appendix:Swadesh lists
wikt:Category:Swadesh lists by language
Projects and databases
Automated Similarity Judgment Program — a project applying computational approaches to comparative linguistics using a database of word lists
Evolution of Human Languages — a project to provide a genealogical classification of the world's languages
Intercontinental Dictionary Series — a database of vocabulary lists in over 200 languages, especially indigenous South American and Northeast Caucasian
Linguistic concepts and fields
Cognate — a word derived from the same word as another
Historical linguistics — the study of language change over time
Indo-European studies — the study of Indo-European languages and their hypothetical common ancestor, Proto-Indo-European
Proto-language — a postulated ancestral language from which a family of languages is presumed to have evolved
Methods of language reconstruction
Comparative method — feature-by-feature comparison of related languages to reconstruct their development and common ancestor
Mass lexical comparison — a controversial method, seen as a rival to the comparative method, to determine the relatedness of languages
Internal reconstruction — reconstruction of an earlier state of a language without comparing it to other languages
Other
Basic English — a simplified form of English for communication and learning
== Notes ==
== References ==
== External links ==
Lexico-semantic universals: A critical overview
Rosetta project
Swadesh Lists of Brazilian Native Languages
Illustrated linguistic and etymology blog by Stephan Steinbach

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