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  2. Plus and minus signs - Wikipedia

    en.wikipedia.org/wiki/Plus_and_minus_signs

    U+2212 − MINUS SIGN; U+002D -HYPHEN-MINUS; U+FE63 ﹣ SMALL HYPHEN-MINUS; U+FE62 ﹢ SMALL PLUS SIGN; U+FF0B + FULLWIDTH PLUS SIGN; U+FF0D - FULLWIDTH HYPHEN-MINUS; Alternative minus signs "÷" being used as a minus sign (not as a division sign) in an excerpt from an official Norwegian trading statement form called «Næringsoppgave 1 ...

  3. Plus–minus sign - Wikipedia

    en.wikipedia.org/wiki/Plus–minus_sign

    The symbol also has a HTML entity representations of ±, ±, and ±. The rarer minus–plus sign is not generally found in legacy encodings, but is available in Unicode as U+2213 ∓ MINUS-OR-PLUS SIGN so can be used in HTML using ∓ or ∓. In TeX 'plus-or-minus' and 'minus-or-plus' symbols are denoted \pm and \mp ...

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    ± (plus–minus sign) 1. Denotes either a plus sign or a minus sign. 2. Denotes the range of values that a measured quantity may have; for example, 10 ± 2 denotes an unknown value that lies between 8 and 12. ∓ (minus-plus sign) Used paired with ±, denotes the opposite sign; that is, + if ± is –, and – if ± is +.

  5. Sign (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Sign_(mathematics)

    When a minus sign is used in between two numbers, it represents the binary operation of subtraction. When a minus sign is written before a single number, it represents the unary operation of yielding the additive inverse (sometimes called negation ) of the operand.

  6. List of trigonometric identities - Wikipedia

    en.wikipedia.org/wiki/List_of_trigonometric...

    Generally, for numbers t1, ..., tn−1 ∈ (−1, 1) for which θn = Σn−1. k=1 arctan tk ∈ (π/4, 3π/4), let tn = tan (π/2 − θn) = cot θn. This last expression can be computed directly using the formula for the cotangent of a sum of angles whose tangents are t1, ..., tn−1 and its value will be in (−1, 1).

  7. Wikipedia:Hyphens and dashes - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Hyphens_and_dashes

    In some styles, minus signs are represented using an en dash instead of a minus sign or a hyphen. This is not done in Wikipedia. In math formulas a hyphen-minus codes for a minus sign, but in text − produces the minus sign (see below). En dash ("–", MOS:ENDASH) are slightly longer than hyphens. They are used: in date ranges, such as ...

  8. Signed number representations - Wikipedia

    en.wikipedia.org/wiki/Signed_number_representations

    In computing, signed number representations are required to encode negative numbers in binary number systems. In mathematics, negative numbers in any base are represented by prefixing them with a minus sign ("−"). However, in RAM or CPU registers, numbers are represented only as sequences of bits, without extra symbols.

  9. Table of mathematical symbols by introduction date - Wikipedia

    en.wikipedia.org/wiki/Table_of_mathematical...

    Johann Rahn. ≤ ≥. 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. d. differential sign.

  10. Triple bar - Wikipedia

    en.wikipedia.org/wiki/Triple_bar

    The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign = with a third line.

  11. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    Order of operations. In mathematics and computer programming, the order of operations is a collection of rules that reflect conventions about which operations to perform first in order to evaluate a given mathematical expression . These rules are formalized with a ranking of the operations. The rank of an operation is called its precedence, and ...