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quod erat demonstrandum

[ kwawd e-raht dey-mawn-strahn-doom; English kwod er-uht dem-uhn-stran-duhm ]

Latin.
  1. which was to be shown or demonstrated.


quod erat demonstrandum

/ 藞kw蓲d 藞蓻r忙t 藢d蓻m蓹n藞str忙nd蕣m /

(no translation)

  1. (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved QED
鈥淐ollins English Dictionary 鈥 Complete & Unabridged鈥 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

quod erat demonstrandum

  1. A phrase used to signal that a proof has just been completed. From Latin , meaning 鈥渢hat which was to be demonstrated.鈥
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Example Sentences

Examples have not been reviewed.

He might usefully have concluded his column with the letters we had to put next to solved mathematical equations: QED 鈥 quod erat demonstrandum 鈥 just to prove his point.

From

At one point, he quotes approvingly a passage from Mein Kampf on how 鈥淢arxism itself systematically plans to hand the world over to the Jews鈥, and then insists that 鈥淲ell, you can鈥檛 argue with logic of that calibre. No: quod erat demonstrandum. Next question, please.鈥

From

QED: quod erat demonstrandum, Latin for 鈥渨hich was to be demonstrated or proved.鈥

From

鈥淏urning Bush鈥 joins the ranks of other recent films from the former Eastern Bloc 鈥 like 鈥淚da鈥 from Poland, 鈥淨uod Erat Demonstrandum鈥 from Romania, 鈥淏arbara鈥 from Germany 鈥 that try to grasp, with the benefit of hindsight but without too much ex post facto gloating, the logic of Communist dictatorship.

From

Queen's Counsel; Queen's College. q.d., quasi dicat=As if he should say. q.e., quod est=Which is. q.e.d., quod erat demonstrandum=Which was to be demonstrated. q.e.f., quod erat faciendum=Which was to be done. q.e.i, quod erat inveniendum=Which was to be found out. q.l., quantum libet=As much as you please.

From

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quodquod erat faciendum