Gamma function
EXTENSION OF THE FACTORIAL FUNCTION, WITH ITS ARGUMENT SHIFTED DOWN BY 1, TO REAL AND COMPLEX NUMBERS
Gamma-function; Complete gamma function; Gamma Function; Gamma integral; Euler Gamma Function; Γ(x); Γ function; Raabe's formula; Approximations of the gamma function; Weierstrass definition of the gamma function; Complex number factorial
In mathematics, the gamma function (represented by , the capital letter gamma from the Greek alphabet) is one commonly used extension of the factorial function to complex numbers. The gamma function is defined for all complex numbers except the non-positive integers.