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  2. Absolute value - Wikipedia

    en.wikipedia.org/wiki/Absolute_value

    The real absolute value function is an example of a continuous function that achieves a global minimum where the derivative does not exist. The subdifferential of | x | at x = 0 is the interval [−1, 1]. [14] The complex absolute value function is continuous everywhere but complex differentiable nowhere because it violates the Cauchy–Riemann ...

  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. Magnitude (mathematics) - Wikipedia

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

    The absolute value (or modulus) ... [3, 4, 12] is 13 because + + = = This is equivalent to the square root of the dot product of the vector ...

  5. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    This allows to define the absolute value (or modulus or magnitude) of z to be the square root [12] | | = +. By Pythagoras' theorem, | | is the distance from the origin to the point representing the complex number z in the complex plane.

  6. Ostrowski's theorem - Wikipedia

    en.wikipedia.org/wiki/Ostrowski's_theorem

    The real absolute value on the rationals is the standard absolute value on the reals, defined to be | | := {, < This is sometimes ... 12 languages ...

  7. Absolute number - Wikipedia

    en.wikipedia.org/wiki/Absolute_number

    Absolute difference, the absolute value of the difference of two real numbers Absolute pseudoprime , a class of pseudoprimes that come from Fermat's little theorem Absolute scale , system of measurement that begins at a zero point and progresses in only one direction

  8. p-adic valuation - Wikipedia

    en.wikipedia.org/wiki/P-adic_valuation

    The p-adic valuation is a valuation and gives rise to an analogue of the usual absolute value. Whereas the completion of the rational numbers with respect to the usual absolute value results in the real numbers R {\displaystyle \mathbb {R} } , the completion of the rational numbers with respect to the p {\displaystyle p} -adic absolute value ...

  9. 12 (number) - Wikipedia

    en.wikipedia.org/wiki/12_(number)

    12 (twelve) is the natural number following 11 and preceding 13.. Twelve is the 3rd superior highly composite number, [1] the 3rd colossally abundant number, [2] the 5th highly composite number, and is divisible by the numbers from 1 to 4, and 6, a large number of divisors comparatively.