Special Functions

Function Notation
Erf $$\operatorname{Erf}$$ $z={\frac{2}{\sqrt {\pi }}}\int_{0}^{z}e^{-t^2}\,dt$
The Error function is the integral of the Gaussian distribution numeric
Erfc $$\operatorname {Erfc}$$ $$z=1-\operatorname {Erf} z$$
The Complementary Error Function numeric
Factorial $$n!$$ The products of all positive integers less than or equal to $$n$$ numeric
Gamma $$\gamma(n)$$ $$(n-1)!$$
The Gamma Function, an extension of the factorial function to real and complex numbers Q190573 numeric
LogGamma $$\ln(\gamma(n))$$ numeric
SignGamma numeric