quod erat demonstrandum


quod erat demonstrandum

(ˈkwɒd ˈɛræt ˌdɛmənˈstrændʊm) 1. (Logic) (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved. Abbreviation: QED 2. (Mathematics) (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved. Abbreviation: QED

quod erat demonstrandum

A Latin phrase meaning which was to be demonstrated, the full form of the abbreviation Q.E.D., used to show that something has been proved.