Feb 19, 2015Β Β· 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. In mathematical notation, what are the usage differences between the various approximately-equal signs "β‰ˆ", "≃", and "β‰…"? The Unicode standard lists all of them inside the Mathematical. May 6, 2015Β Β· The meaning of various equality symbols Ask Question Asked 10 years, 8 months ago Modified 9 years, 8 months ago

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Jul 1, 2022Β Β· Textbook Notation: Meaning of cf. [closed] Ask Question Asked 3 years, 6 months ago Modified 3 years, 6 months ago

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