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In the AMS Theorem Environment for LaTeX, the hollow square is the default end-of-proof symbol. Unicode explicitly provides the "end of proof" character, U+220E (∎). Some authors use other Unicode symbols to note the end of a proof, including, (U+25AE, a black vertical rectangle), and ‣ (U+2023, a triangular bullet).
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]
Use of the letter x for an independent variable or unknown value. See History of algebra: The symbol x. 1637 [2] ... end of proof sign (a.k.a. tombstone) 1950 [5]
Used for marking the end of a proof and separating it from the current text. The initialism Q.E.D. or QED ( Latin : quod erat demonstrandum , "as was to be shown") is often used for the same purpose, either in its upper-case form or in lower case.
BSI proof-correction marks (conforming to BS 5261C:2005) as prepared by the Chartered Institute of Editing and Proofreading; The style guide for publications of the European Union is presented in 24 European languages and includes a section on proofreading. Each edition has a sheet of proofreader's marks that appears to be the same apart from ...
Provide the letter to the seller: As soon as you receive the proof of funds letter, pass copies along to your lender and the seller. As with all of your mortgage documents , keep another copy of ...
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Proof Description of proof End. The end of the proof may be signaled by the letters Q.E.D. (quod erat demonstrandum) or by one of the tombstone marks, such as " " or "∎", meaning "end of proof", introduced by Paul Halmos following their use in magazines to mark the end of an article. [15] The exact style depends on the author or publication.
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