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Q.E.D.

Index Q.E.D.

Q.E.D. (also written QED and QED) is an initialism of the Latin phrase quod erat demonstrandum meaning "what was to be demonstrated" or "what was to be shown." Some may also use a less direct translation instead: "thus it has been demonstrated." Traditionally, the phrase is placed in its abbreviated form at the end of a mathematical proof or philosophical argument when the original proposition has been restated exactly, as the conclusion of the demonstration or completion of the proof. [1]

80 relations: A Greek–English Lexicon, A priori and a posteriori, Acronym, Albanian language, Arabic, Archimedes, Argument, Armenian language, Axiom, Baruch Spinoza, Bengali language, Bob's your uncle, Catalan language, Catch-22, Chaplain Tappman, Chinese language, Cryptonomicon, Czech language, Danish language, Diary, Dutch language, Equilateral triangle, Esperanto, Estonian language, Ethics (Spinoza), Euclid, Finnish language, French language, Galician language, Geometry, Georgian language, German language, Greek language, Hebrew language, Hindi, Hungarian language, Icelandic language, Ipso facto, Italian language, Joseph Heller, Latvian language, Lemma (mathematics), List of Latin abbreviations, List of Latin phrases, List of Latin phrases (full), List of races and species in The Hitchhiker's Guide to the Galaxy, List of works published posthumously, Macmillan Publishers, Masterpiece, Mathematical proof, ..., Meditations on First Philosophy, Neal Stephenson, Norwegian language, Paul Halmos, Philosophy, Polish language, Portuguese language, Renaissance, René Descartes, Romanian language, Russian language, Sanskrit, Serbo-Croatian, Slovak language, Slovene language, Spanish language, Swedish language, Tamil language, TeX, Thai language, The Hitchhiker's Guide to the Galaxy, The Hitchhiker's Guide to the Galaxy (fictional), The Hitchhiker's Guide to the Galaxy (novel), Theorem, Thomas Dolby, Tombstone (typography), Turkish language, Ukrainian language, Unicode, Vietnamese language. Expand index (30 more) »

A Greek–English Lexicon

A Greek–English Lexicon, often referred to as Liddell & Scott, Liddell–Scott–Jones, or LSJ, is a standard lexicographical work of the Ancient Greek language.

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A priori and a posteriori

The Latin phrases a priori ("from the earlier") and a posteriori ("from the latter") are philosophical terms of art popularized by Immanuel Kant's Critique of Pure Reason (first published in 1781, second edition in 1787), one of the most influential works in the history of philosophy.

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Acronym

An acronym is a word or name formed as an abbreviation from the initial components in a phrase or a word, usually individual letters (as in NATO or laser) and sometimes syllables (as in Benelux).

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Albanian language

Albanian (shqip, or gjuha shqipe) is a language of the Indo-European family, in which it occupies an independent branch.

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Arabic

Arabic (العَرَبِيَّة) or (عَرَبِيّ) or) is a Central Semitic language that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world. It is named after the Arabs, a term initially used to describe peoples living from Mesopotamia in the east to the Anti-Lebanon mountains in the west, in northwestern Arabia, and in the Sinai peninsula. Arabic is classified as a macrolanguage comprising 30 modern varieties, including its standard form, Modern Standard Arabic, which is derived from Classical Arabic. As the modern written language, Modern Standard Arabic is widely taught in schools and universities, and is used to varying degrees in workplaces, government, and the media. The two formal varieties are grouped together as Literary Arabic (fuṣḥā), which is the official language of 26 states and the liturgical language of Islam. Modern Standard Arabic largely follows the grammatical standards of Classical Arabic and uses much of the same vocabulary. However, it has discarded some grammatical constructions and vocabulary that no longer have any counterpart in the spoken varieties, and has adopted certain new constructions and vocabulary from the spoken varieties. Much of the new vocabulary is used to denote concepts that have arisen in the post-classical era, especially in modern times. During the Middle Ages, Literary Arabic was a major vehicle of culture in Europe, especially in science, mathematics and philosophy. As a result, many European languages have also borrowed many words from it. Arabic influence, mainly in vocabulary, is seen in European languages, mainly Spanish and to a lesser extent Portuguese, Valencian and Catalan, owing to both the proximity of Christian European and Muslim Arab civilizations and 800 years of Arabic culture and language in the Iberian Peninsula, referred to in Arabic as al-Andalus. Sicilian has about 500 Arabic words as result of Sicily being progressively conquered by Arabs from North Africa, from the mid 9th to mid 10th centuries. Many of these words relate to agriculture and related activities (Hull and Ruffino). Balkan languages, including Greek and Bulgarian, have also acquired a significant number of Arabic words through contact with Ottoman Turkish. Arabic has influenced many languages around the globe throughout its history. Some of the most influenced languages are Persian, Turkish, Spanish, Urdu, Kashmiri, Kurdish, Bosnian, Kazakh, Bengali, Hindi, Malay, Maldivian, Indonesian, Pashto, Punjabi, Tagalog, Sindhi, and Hausa, and some languages in parts of Africa. Conversely, Arabic has borrowed words from other languages, including Greek and Persian in medieval times, and contemporary European languages such as English and French in modern times. Classical Arabic is the liturgical language of 1.8 billion Muslims and Modern Standard Arabic is one of six official languages of the United Nations. All varieties of Arabic combined are spoken by perhaps as many as 422 million speakers (native and non-native) in the Arab world, making it the fifth most spoken language in the world. Arabic is written with the Arabic alphabet, which is an abjad script and is written from right to left, although the spoken varieties are sometimes written in ASCII Latin from left to right with no standardized orthography.

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Archimedes

Archimedes of Syracuse (Ἀρχιμήδης) was a Greek mathematician, physicist, engineer, inventor, and astronomer.

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Argument

In logic and philosophy, an argument is a series of statements typically used to persuade someone of something or to present reasons for accepting a conclusion.

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Armenian language

The Armenian language (reformed: հայերեն) is an Indo-European language spoken primarily by the Armenians.

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Axiom

An axiom or postulate is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments.

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Baruch Spinoza

Baruch Spinoza (born Benedito de Espinosa,; 24 November 1632 – 21 February 1677, later Benedict de Spinoza) was a Dutch philosopher of Sephardi/Portuguese origin.

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Bengali language

Bengali, also known by its endonym Bangla (বাংলা), is an Indo-Aryan language spoken in South Asia.

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Bob's your uncle

...And Bob's your uncle is an expression of unknown origin, that means "and there it is" or "and there you have it." It is commonly used in United Kingdom and Commonwealth countries.

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Catalan language

Catalan (autonym: català) is a Western Romance language derived from Vulgar Latin and named after the medieval Principality of Catalonia, in northeastern modern Spain.

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Catch-22

Catch-22 is a satirical novel by American author Joseph Heller.

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Chaplain Tappman

Chaplain Captain Albert Taylor Tappman (A.T. Tappman) (usually referred to as "the Chaplain") is a fictional character in Joseph Heller's novel Catch-22.

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Chinese language

Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family.

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Cryptonomicon

Cryptonomicon is a 1999 novel by American author Neal Stephenson, set in two different time periods.

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Czech language

Czech (čeština), historically also Bohemian (lingua Bohemica in Latin), is a West Slavic language of the Czech–Slovak group.

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Danish language

Danish (dansk, dansk sprog) is a North Germanic language spoken by around six million people, principally in Denmark and in the region of Southern Schleswig in northern Germany, where it has minority language status.

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Diary

A diary is a record (originally in handwritten format) with discrete entries arranged by date reporting on what has happened over the course of a day or other period.

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Dutch language

The Dutch language is a West Germanic language, spoken by around 23 million people as a first language (including the population of the Netherlands where it is the official language, and about sixty percent of Belgium where it is one of the three official languages) and by another 5 million as a second language.

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Equilateral triangle

In geometry, an equilateral triangle is a triangle in which all three sides are equal.

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Esperanto

Esperanto (or; Esperanto) is a constructed international auxiliary language.

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Estonian language

Estonian (eesti keel) is the official language of Estonia, spoken natively by about 1.1 million people: 922,000 people in Estonia and 160,000 outside Estonia.

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Ethics (Spinoza)

Ethics, Demonstrated in Geometrical Order (Ethica, ordine geometrico demonstrata), usually known as the Ethics, is a philosophical treatise written by Benedict de Spinoza.

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Euclid

Euclid (Εὐκλείδης Eukleidēs; fl. 300 BC), sometimes given the name Euclid of Alexandria to distinguish him from Euclides of Megara, was a Greek mathematician, often referred to as the "founder of geometry" or the "father of geometry".

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Finnish language

Finnish (or suomen kieli) is a Finnic language spoken by the majority of the population in Finland and by ethnic Finns outside Finland.

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French language

French (le français or la langue française) is a Romance language of the Indo-European family.

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Galician language

Galician (galego) is an Indo-European language of the Western Ibero-Romance branch.

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Geometry

Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.

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Georgian language

Georgian (ქართული ენა, translit.) is a Kartvelian language spoken by Georgians.

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German language

German (Deutsch) is a West Germanic language that is mainly spoken in Central Europe.

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Greek language

Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.

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Hebrew language

No description.

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Hindi

Hindi (Devanagari: हिन्दी, IAST: Hindī), or Modern Standard Hindi (Devanagari: मानक हिन्दी, IAST: Mānak Hindī) is a standardised and Sanskritised register of the Hindustani language.

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Hungarian language

Hungarian is a Finno-Ugric language spoken in Hungary and several neighbouring countries. It is the official language of Hungary and one of the 24 official languages of the European Union. Outside Hungary it is also spoken by communities of Hungarians in the countries that today make up Slovakia, western Ukraine, central and western Romania (Transylvania and Partium), northern Serbia (Vojvodina), northern Croatia, and northern Slovenia due to the effects of the Treaty of Trianon, which resulted in many ethnic Hungarians being displaced from their homes and communities in the former territories of the Austro-Hungarian Empire. It is also spoken by Hungarian diaspora communities worldwide, especially in North America (particularly the United States). Like Finnish and Estonian, Hungarian belongs to the Uralic language family branch, its closest relatives being Mansi and Khanty.

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Icelandic language

Icelandic (íslenska) is a North Germanic language, and the language of Iceland.

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Ipso facto

Ipso facto is a Latin phrase, directly translated as "by the fact itself", which means that a specific phenomenon is a direct consequence, a resultant effect, of the action in question, instead of being brought about by a previous action.

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Italian language

Italian (or lingua italiana) is a Romance language.

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Joseph Heller

Joseph Heller (May 1, 1923 – December 12, 1999) was an American author of novels, short stories, plays and screenplays.

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Latvian language

Latvian (latviešu valoda) is a Baltic language spoken in the Baltic region.

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Lemma (mathematics)

In mathematics, a "helping theorem" or lemma (plural lemmas or lemmata) is a proven proposition which is used as a stepping stone to a larger result rather than as a statement of interest by itself.

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List of Latin abbreviations

This is a list of common Latin abbreviations.

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List of Latin phrases

This page lists direct English translations of common Latin phrases, such as veni, vidi, vici and et cetera.

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List of Latin phrases (full)

This page lists direct English translations of common Latin phrases.

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List of races and species in The Hitchhiker's Guide to the Galaxy

This is a list of races, fauna, and flora (as well as creatures without category) featured in various incarnations of The Hitchhiker's Guide to the Galaxy.

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List of works published posthumously

The following is a list of works that were published or distributed posthumously.

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Macmillan Publishers

Macmillan Publishers Ltd (occasionally known as the Macmillan Group) is an international publishing company owned by Holtzbrinck Publishing Group.

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Masterpiece

Masterpiece, magnum opus (Latin, great work) or chef-d’œuvre (French, master of work, plural chefs-d’œuvre) in modern use is a creation that has been given much critical praise, especially one that is considered the greatest work of a person's career or to a work of outstanding creativity, skill, profundity, or workmanship.

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Mathematical proof

In mathematics, a proof is an inferential argument for a mathematical statement.

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Meditations on First Philosophy

Meditations on First Philosophy —The original Meditations, translated, in its entirety.

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Neal Stephenson

Neal Town Stephenson (born October 31, 1959) is an American writer and game designer known for his works of speculative fiction.

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Norwegian language

Norwegian (norsk) is a North Germanic language spoken mainly in Norway, where it is the official language.

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Paul Halmos

Paul Richard Halmos (Halmos Pál; March 3, 1916 – October 2, 2006) was a Hungarian-Jewish-born American mathematician who made fundamental advances in the areas of mathematical logic, probability theory, statistics, operator theory, ergodic theory, and functional analysis (in particular, Hilbert spaces).

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Philosophy

Philosophy (from Greek φιλοσοφία, philosophia, literally "love of wisdom") is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language.

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Polish language

Polish (język polski or simply polski) is a West Slavic language spoken primarily in Poland and is the native language of the Poles.

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Portuguese language

Portuguese (português or, in full, língua portuguesa) is a Western Romance language originating from the regions of Galicia and northern Portugal in the 9th century.

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Renaissance

The Renaissance is a period in European history, covering the span between the 14th and 17th centuries.

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René Descartes

René Descartes (Latinized: Renatus Cartesius; adjectival form: "Cartesian"; 31 March 1596 – 11 February 1650) was a French philosopher, mathematician, and scientist.

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Romanian language

Romanian (obsolete spellings Rumanian, Roumanian; autonym: limba română, "the Romanian language", or românește, lit. "in Romanian") is an East Romance language spoken by approximately 24–26 million people as a native language, primarily in Romania and Moldova, and by another 4 million people as a second language.

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Russian language

Russian (rússkiy yazýk) is an East Slavic language, which is official in Russia, Belarus, Kazakhstan and Kyrgyzstan, as well as being widely spoken throughout Eastern Europe, the Baltic states, the Caucasus and Central Asia.

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Sanskrit

Sanskrit is the primary liturgical language of Hinduism; a philosophical language of Hinduism, Sikhism, Buddhism and Jainism; and a former literary language and lingua franca for the educated of ancient and medieval India.

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Serbo-Croatian

Serbo-Croatian, also called Serbo-Croat, Serbo-Croat-Bosnian (SCB), Bosnian-Croatian-Serbian (BCS), or Bosnian-Croatian-Montenegrin-Serbian (BCMS), is a South Slavic language and the primary language of Serbia, Croatia, Bosnia and Herzegovina, and Montenegro.

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Slovak language

Slovak is an Indo-European language that belongs to the West Slavic languages (together with Czech, Polish, and Sorbian).

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Slovene language

Slovene or Slovenian (slovenski jezik or slovenščina) belongs to the group of South Slavic languages.

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Spanish language

Spanish or Castilian, is a Western Romance language that originated in the Castile region of Spain and today has hundreds of millions of native speakers in Latin America and Spain.

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Swedish language

Swedish is a North Germanic language spoken natively by 9.6 million people, predominantly in Sweden (as the sole official language), and in parts of Finland, where it has equal legal standing with Finnish.

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Tamil language

Tamil (தமிழ்) is a Dravidian language predominantly spoken by the Tamil people of India and Sri Lanka, and by the Tamil diaspora, Sri Lankan Moors, Burghers, Douglas, and Chindians.

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TeX

TeX (see below), stylized within the system as TeX, is a typesetting system (or "formatting system") designed and mostly written by Donald Knuth and released in 1978.

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Thai language

Thai, Central Thai, or Siamese, is the national and official language of Thailand and the first language of the Central Thai people and vast majority Thai of Chinese origin.

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The Hitchhiker's Guide to the Galaxy

The Hitchhiker's Guide to the Galaxy (sometimes referred to as HG2G, HHGTTG or H2G2) is a comedy science fiction series created by Douglas Adams.

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The Hitchhiker's Guide to the Galaxy (fictional)

The Hitchhiker's Guide to the Galaxy is a fictional electronic guide book in the multimedia scifi/comedy series of the same name by Douglas Adams.

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The Hitchhiker's Guide to the Galaxy (novel)

The Hitchhiker's Guide to the Galaxy is the first of five books in the Hitchhiker's Guide to the Galaxy comedy science fiction "trilogy" by Douglas Adams.

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Theorem

In mathematics, a theorem is a statement that has been proven on the basis of previously established statements, such as other theorems, and generally accepted statements, such as axioms.

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Thomas Dolby

Thomas Morgan Robertson (born 14 October 1958), known by the stage name Thomas Dolby, is an English musician, singer and producer.

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Tombstone (typography)

The tombstone, Halmos, end of proof, or Q.E.D. mark "∎" is used in mathematics to denote the end of a proof, in place of the traditional abbreviation "Q.E.D." for the Latin phrase "quod erat demonstrandum", "which was to be shown".

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Turkish language

Turkish, also referred to as Istanbul Turkish, is the most widely spoken of the Turkic languages, with around 10–15 million native speakers in Southeast Europe (mostly in East and Western Thrace) and 60–65 million native speakers in Western Asia (mostly in Anatolia).

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Ukrainian language

No description.

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Unicode

Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.

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Vietnamese language

Vietnamese (Tiếng Việt) is an Austroasiatic language that originated in Vietnam, where it is the national and official language.

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Redirects here:

C.Q.F.D., Cqfd, Q E D, Q. E. D., Q.E.D, Q.E.F, Q.E.F., Q.e.d., QEF, Quad Erat Demonstrandum, Quod Erat Demonstrandum, Quod Erat Demonstrantum, Quod erat demonstrandum, Quod erat demonstratum, Quod erat faciendum, Ὅπερ ἔδει δειξαι.

References

[1] https://en.wikipedia.org/wiki/Q.E.D.

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