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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
The 219 area code covers the northwest part of the state, including the cities of Gary, Hammond, Merrillville, Valparaiso and Michigan City. The 574 area code covers north-central Indiana, and includes the cities of South Bend, North Judson and Warsaw. The 260 area code covers the northeast section of Indiana, including Fort Wayne and Angola.
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.
With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning ten-digit dialing within the city limits of Chicago. The remaining area without an overlay in the northern part of Illinois, 708, eventually received such with area code 464 taking effect on January 21 ...
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
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]
a quod, the main playing item in the fictional sport of Quodpot in the Harry Potter universe; Quod (board game), an abstract strategy game; The word is also common in several Latin phrases used in different (English) contexts: per quod; ad quod damnum; nemo dat quod non habet; quod erat demonstrandum (often abbreviated "Q.E.D.")