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Quod erat demonstrandum, Q.E.D., QED
Which was the thing to be demonstrated; Which was to be demonstrated.
A formula appended at the end of a proof in geometry, or other mathematical solution, with the meaning, "We have proven the proposition we set out to prove."
This entry is located in the following units: Latin Proverbs, Mottoes, Phrases, and Words: Group Q (page 3) monstro-, monstr-, mone-, monu-, moni- (page 4)