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  2. C mathematical functions - Wikipedia

    en.wikipedia.org/wiki/C_mathematical_functions

    C mathematical operations are a group of functions in the standard library of the C programming language implementing basic mathematical functions. [1] [2] All functions use floating-point numbers in one manner or another. Different C standards provide different, albeit backwards-compatible, sets of functions.

  3. 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 ...

  4. Real number - Wikipedia

    en.wikipedia.org/wiki/Real_number

    Download as PDF; Printable version; ... Absolute value: the absolute value of a real number a, ... This is the case in constructive mathematics and computer programming.

  5. 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)

  6. Sign function - Wikipedia

    en.wikipedia.org/wiki/Sign_function

    A subderivative value 0 occurs here because the absolute value function is at a minimum. The full family of valid subderivatives at zero constitutes the subdifferential interval [ − 1 , 1 ] {\displaystyle [-1,1]} , which might be thought of informally as "filling in" the graph of the sign function with a vertical line through the origin ...

  7. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    A complex number can also be defined by its geometric polar coordinates: the radius is called the absolute value of the complex number, while the angle from the positive real axis is called the argument of the complex number. The complex numbers of absolute value one form the unit circle.

  8. 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 ((), ()) = = ((), ()).

  9. Algebraic number theory - Wikipedia

    en.wikipedia.org/wiki/Algebraic_number_theory

    Ostrowski's theorem states that these are all possible absolute value functions on Q (up to equivalence). Therefore, absolute values are a common language to describe both the real embedding of Q and the prime numbers. A place of an algebraic number field is an equivalence class of absolute value functions on K. There are two types of places.