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Signum function = . In mathematics, the sign function or signum function (from signum, Latin for "sign") is a function that has the value −1, +1 or 0 according to whether the sign of a given real number is positive or negative, or the given number is itself zero.
In mathematics and physics, ... The sign function or signum function extracts the sign of a real number, by mapping the set of real numbers to the set of the three ...
The matrix sign function is a generalization of the complex signum function = {() >, <, to the matrix valued analogue ().Although the sign function is not analytic, the matrix function is well defined for all matrices that have no eigenvalue on the imaginary axis, see for example the Jordan-form-based definition (where the derivatives are all zero).
In mathematics, when X is a finite ... the permutations of X (i.e. the bijective functions from X to X) ... The sign, signature, or signum of a permutation ...
A wide variety of sigmoid functions including the logistic and hyperbolic tangent functions have been used as the activation function of artificial neurons. Sigmoid curves are also common in statistics as cumulative distribution functions (which go from 0 to 1), such as the integrals of the logistic density , the normal density , and Student's ...
Signum, part of Roman naming conventions; Signum, an alternative name for some Roman Republic army units; Signum (anatomy), a part of the female Lepidoptera genitalia; Signum function or sign function in mathematics; Signum manus, type of signature; Signum (blockchain) Signum University, an online educational institution
I think the lead section of the article should be changed to something like: "In mathematics, the signum function (from signum, Latin for "sign") is an odd mathematical function that extracts the sign of a real number. This function is also sometimes called the sign function, although this may lead to confusion with the sine function.
In mathematics, Tanaka's equation is ... The signum function does not satisfy the Lipschitz continuity condition required for the usual theorems guaranteeing ...