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Q.E.D.


 

:For other meanings of the abbreviation "QED", see QED.

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Q. E. D. is an abbreviation of the Latin phrase "quod erat demonstrandum" (literally, "that which was to be demonstrated"). This is a translation of the Greek {{Polytonic|???? ???? ??????}} (hóper édei de?xai) which was used by many early mathematicians including Euclid and Archimedes. Q.E.D. may be written at the end of mathematical proofs to show that the result required for the proof to be complete has been obtained. It is not seen as frequently now as in earlier centuries.

Related Topics:
Latin phrase - Euclid - Archimedes - Mathematical proof

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