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  2. Absolute value - Wikipedia

    en.wikipedia.org/wiki/Absolute_value

    In 1806, Jean-Robert Argand introduced the term module, meaning unit of measure in French, specifically for the complex absolute value, [1] [2] and it was borrowed into English in 1866 as the Latin equivalent modulus. [1] The term absolute value has been used in this sense from at least 1806 in French [3] and 1857 in English. [4] The notation ...

  3. Absolute value (algebra) - Wikipedia

    en.wikipedia.org/wiki/Absolute_value_(algebra)

    The standard absolute value on the integers. The standard absolute value on the complex numbers.; The p-adic absolute value on the rational numbers.; If R is the field of rational functions over a field F and () is a fixed irreducible polynomial over F, then the following defines an absolute value on R: for () in R define | | to be , where () = () and ((), ()) = = ((), ()).

  4. Root of unity - Wikipedia

    en.wikipedia.org/wiki/Root_of_unity

    In fact, the n th roots of unity being the roots of the polynomial X n – 1, their sum is the coefficient of degree n – 1, which is either 1 or 0 according whether n = 1 or n > 1. Alternatively, for n = 1 there is nothing to prove, and for n > 1 there exists a root z ≠ 1 – since the set S of all the n th roots of unity is a group , z S ...

  5. Template:Absolute value - Wikipedia

    en.wikipedia.org/wiki/Template:Absolute_value

    This template may be used to enclose text between two vertical bars (U+007C | VERTICAL LINE), such as to denote the absolute value. It adds padding (of width 0.1 em) on each side inside the bars. It adds padding (of width 0.1 em) on each side inside the bars.

  6. Absolutely integrable function - Wikipedia

    en.wikipedia.org/wiki/Absolutely_integrable_function

    Then | | + + + + + | | so | | + + + + + | | This shows that the sum of the four integrals (in the middle) is finite if and only if the integral of the absolute value is finite, and the function is Lebesgue integrable only if all the four integrals are finite. So having a finite integral of the absolute value is equivalent to the conditions for ...

  7. Absolute convergence - Wikipedia

    en.wikipedia.org/wiki/Absolute_convergence

    The same definition can be used for series = whose terms are not numbers but rather elements of an arbitrary abelian topological group.In that case, instead of using the absolute value, the definition requires the group to have a norm, which is a positive real-valued function ‖ ‖: + on an abelian group (written additively, with identity element 0) such that:

  8. Ostrowski's theorem - Wikipedia

    en.wikipedia.org/wiki/Ostrowski's_theorem

    The following proof follows the one of Theorem 10.1 in Schikhof (2007). Let | | be an absolute value on the rationals. We start the proof by showing that it is entirely determined by the values it takes on prime numbers.

  9. Absolute number - Wikipedia

    en.wikipedia.org/wiki/Absolute_number

    Absolute zero, the lowest limit of the thermodynamic temperature scale; Absolute magnitude, a measure of the luminosity of a celestial object; Relative change and difference, used to compare two quantities taking into account the "sizes" of the things being compared; Absolute (disambiguation) Number (disambiguation)

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