# SuanShu, a Java numerical and statistical library

com.numericalmethod.suanshu.analysis.function.special.gamma

## Interface Gamma

• All Known Implementing Classes:
GammaGergoNemes, GammaLanczos, GammaLanczosQuick

public interface Gamma
The Gamma function is an extension of the factorial function to real and complex numbers, with its argument shifted down by 1. For real numbers, it is defined as: $\Gamma(z) = \int_0^\infty e^{-t} t^{z-1} dt$
• ### Method Summary

All Methods
Modifier and Type Method and Description
double evaluate(double x)
Evaluate $$\Gamma(z) = \int_0^\infty e^{-t} t^{z-1} dt$$.
• ### Method Detail

• #### evaluate

double evaluate(double x)
Evaluate $$\Gamma(z) = \int_0^\infty e^{-t} t^{z-1} dt$$.
Parameters:
x - x
Returns:
$$\Gamma(z)$$