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Q.E.D. or QED is an initialism of the Latin phrase quod erat demonstrandum, meaning "that which was to be demonstrated". Literally, it states "what was to be shown". [ 1 ] Traditionally, the abbreviation is placed at the end of mathematical proofs and philosophical arguments in print publications, to indicate that the proof or the argument is ...
quod erat faciendum (Q.E.F.) which was to be done: Or "which was to be constructed". Used in translations of Euclid's Elements when there was nothing to prove, but there was something being constructed, for example a triangle with the same size as a given line. quod est (q.e.) which is: quod est necessarium est licitum: what is necessary is lawful
quod erat demonstrandum "that which was to be demonstrated" [1] Cited in many texts at the end of a mathematical proof. Example: "At the end of the long proof, the professor exclaimed ' QED! '" q.v. qq.v. quod vide quae vide "which see" Imperative, [1] used after a term or phrase that should be looked up elsewhere in the current document or book.
In mathematics, the tombstone, halmos, end-of-proof, or Q.E.D. symbol "∎" (or " ") is a symbol used to denote the end of a proof, in place of the traditional abbreviation "Q.E.D." for the Latin phrase "quod erat demonstrandum". It is inspired by the typographic practice of end marks, an element that marks the end of an article. [1] [2]
Chicago Sun-Times/Chicago Daily News collection/Chicago History Museum/Getty ImagesDuring Prohibition, enforcing the nation’s liquor ban was a game of cat and mouse. Smugglers, speakeasies, and ...
Q.E.D. (quod erat demonstrandum), used at the end of a mathematical proof; Quantum electrodynamics, a field in particle physics; QED manifesto and project, a database of mathematical knowledge; QED: The Strange Theory of Light and Matter, a 1985 physics book by Richard Feynman
This abbreviation stands for "quod erat demonstrandum", which is Latin for "that which was to be demonstrated". A more common alternative is to use a square or a rectangle, such as or ∎, known as a " tombstone " or "halmos" after its eponym Paul Halmos .
When she visited Italy for the first time with her father back in 1975, Rabbi Barbara Aiello, from the United States, remembers thinking, “I’ll live here one day.”