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Learn the meanings and uses of various mathematical symbols, such as + (plus sign), − (minus sign), × (multiplication sign), and more. See examples, syntax, and Unicode and LaTeX renderings of each symbol.
Learn about the history, usage and meaning of the plus sign (+) and the minus sign (−) in mathematics and other fields. Find out how they are derived from Latin letters, how they are written in different languages and symbols, and how they are used as operators, functions and prefixes.
Learn about the meaning, usage and history of various symbols and signs used in typography, such as + (plus sign), ≈ (almost equal to), ́ (acute accent) and more. See the Unicode name, similar glyphs and related articles for each symbol.
Learn about the sign of a number, which is its property of being positive, negative, or 0. See how the sign of a number affects various operations, such as subtraction, negation, and absolute value, and how it applies to different number systems, such as integers, rationals, and complex numbers.
The plus–minus sign or plus-or-minus sign, ±, is a symbol with multiple meanings. In mathematics , it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction .
unstrict inequality signs (less-than or equals to sign and greater-than or equals to sign) 1670 (with the horizontal bar over the inequality sign, rather than below it) John Wallis: 1734 (with double horizontal bar below the inequality sign) Pierre Bouguer
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