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  2. Division sign - Wikipedia

    en.wikipedia.org/wiki/Division_sign

    Other symbols for division include the slash or solidus /, the colon:, and the fraction bar (the horizontal bar in a vertical fraction). [3] [4] The ISO 80000-2 standard for mathematical notation recommends only the solidus / or "fraction bar" for division, or the "colon" : for ratios; it says that the ÷ sign "should not be used" for division. [1]

  3. Division (mathematics) - Wikipedia

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

    This division sign is also used alone to represent the division operation itself, as for instance as a label on a key of a calculator. The obelus was introduced by Swiss mathematician Johann Rahn in 1659 in Teutsche Algebra. [10]: 211 The ÷ symbol is used to indicate subtraction in some European countries, so its use may be misunderstood. [11]

  4. Table of mathematical symbols by introduction date - Wikipedia

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

    See History of algebra: The symbol x. 1637 [2] René Descartes (La Géométrie) √ ̅ . ... 1684 (deriving from use of colon to denote fractions, dating back to 1633

  5. Glossary of mathematical symbols - Wikipedia

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

    2. In geometry and linear algebra, denotes the cross product. 3. In set theory and category theory, denotes the Cartesian product and the direct product. See also × in § Set theory. · 1. Denotes multiplication and is read as times; for example, 3 ⋅ 2. 2. In geometry and linear algebra, denotes the dot product. 3.

  6. Long division - Wikipedia

    en.wikipedia.org/wiki/Long_division

    An example of long division performed without a calculator. A more detailed breakdown of the steps goes as follows: Find the shortest sequence of digits starting from the left end of the dividend, 500, that the divisor 4 goes into at least once. In this case, this is simply the first digit, 5.

  7. Ideal quotient - Wikipedia

    en.wikipedia.org/wiki/Ideal_quotient

    In abstract algebra, if I and J are ideals of a commutative ring R, their ideal quotient ... (I : J) is sometimes referred to as a colon ideal because of the notation.

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  9. Set-builder notation - Wikipedia

    en.wikipedia.org/wiki/Set-builder_notation

    The vertical bar (or colon) is a separator that can be read as "such that", "for which", or "with the property that". The formula Φ(x) is said to be the rule or the predicate. All values of x for which the predicate holds (is true) belong to the set being defined.