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The phrase quod erat demonstrandum is a translation into Latin from the Greek ὅπερ ἔδει δεῖξαι (hoper edei deixai; abbreviated as ΟΕΔ). Translating from the Latin phrase into English yields "that was to be demonstrated".
The meaning of QUOD ERAT DEMONSTRANDUM is which (is what) was to be shown (originally) —abbreviation QED—used at the end of a logical or mathematical proof.
Quod erat demonstrandum means 'which was to be shown, or proved'. (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved.... Click for English pronunciations, examples sentences, video.
Oct 8, 2018 · The Latin quod erat demonstrandum literally means “what was to be demonstrated.” It is actually a transliteration of a phrase ancient Greek mathematicians placed at the end of logical proofs—a kind of stamp that says “I proved what I set out to.
There are two meanings listed in OED's entry for the phrase quod erat demonstrandum. See ‘Meaning & use’ for definitions, usage, and quotation evidence.
"Q.E.D." is an abbreviation derived from the Latin phrase "quod erat demonstrandum," which translates to "which was to be demonstrated" in English. It is used at the end of a proof or argument to signify that the desired outcome or conclusion has been successfully demonstrated or proven.
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Quod erat demonstrandum means 'which was to be shown, or proved'. (at the conclusion of a proof, esp of a theorem in Euclidean geometry) which was to be proved.... Click for pronunciations, examples sentences, video.
