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Q.E.D. - Wikipedia, the free encyclopedia
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List of Latin abbreviations - Wikipedia, the free encyclopedia
Latin was once the universal academic language in Europe. From the eighteenth century authors started using their mother tongue to write books, papers or proceedings. However, many Latin abbreviations...
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Cf. is an abbreviation for the Latin-derived word confer, meaning "compare" or "consult", and is hence used to refer to other material or ideas which may provide auxiliary information or arguments.... (confer) means "bring together" and hence "compare" (confer is the imperative of the Latin verb conferre).
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The tombstone, halmos, or end of proof mark "" is used in mathematics to denote the end of a Mathematical proof, in place of the traditional abbreviation "QED" for the Latin phrase "Q.E.D." .... or Halmos symbol (after Paul Halmos...
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Definitions and Word Differences question: What is QED? ... QED is an abbreviation for the Latin "quod erat demonstrandum" (literally, "which was to be demonstrated" or "thus it is demonstrated". It is used at the end of a proof or logical argument by the author to state that he has reached the end of his argument and...
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I had always supposed that it must have been the standard ending for proofs in Latin, but a random survey of some early editions of Euclid's Elements proves otherwise. ... So is it to Barrow that we owe the use of the abbreviation QED? And how about reviving the latter two abbreviations, which seem to have fallen into disuse?
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QED is an abbreviation of the latin phrase quod erat demonstrandum which means "which was to be demonstrated". Traditionally it is used in mathematical proofs to signify that the last statement deduced was the one to be demonstrated.
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