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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). The meaning of the Latin phrase is "that [thing] which was to be demonstrated" (with demonstrandum in the gerundive).
Origins: Quod Erat Demonstrandum. Aristotle was the first thinker to know how he was thinking logically. When did people begin to think logically? There is no answer to this question.
19 Φεβ 2015 · It's an abbreviation of quod erat demonstrandum, which is the Latin translation of a Greek phrase meaning "which had to be proven". To the ancient Greeks, a proof wasn't complete unless the last sentence in your proof was basically the statement of the theorem.
Quod erat demonstrandum is a Latin phrase meaning 'which was to be demonstrated.' It is often abbreviated as Q.E.D. and is traditionally used at the end of a mathematical proof or philosophical argument to signify that the proof has been completed successfully.
Philippe van Lansberge's 1604 Triangulorum Geometriæ used quod erat demonstrandum to conclude some proofs; others ended with phrases such as sigillatim deinceps demonstrabitur, magnitudo demonstranda est, and other variants.
19 Αυγ 2022 · Scripture. Our verse for today comes from Philippians 1:6, ” And I am sure of this, that He who began a good work in you will bring it to completion unto the day of Jesus Christ. Background. When...
What is the Greek version of " quod erat demonstrandum "? Edit: The symbol will denote the end of a proof; it may be read as "Q.E.D." abbreviating the Latin quod erat demonstrandum, which translates the Greek of Euclid of Alexandria "ὅπερ ἔδει δεῖξαι".
