The special functions portion of Commons-Math contains several useful functions not provided by java.lang.Math. These functions mostly serve as building blocks for other portions of Commons-Math but, as others may find them useful as stand-alone methods, these special functions were included as part of the Commons-Math public API.

org.apache.commons.math.special.Gamma contains several useful functions involving the Gamma Function.

Function	Method	Reference
Log Gamma	logGamma	See Gamma Function from MathWorld
Regularized Gamma	regularizedGammaP	See Regularized Gamma Function from MathWorld

org.apache.commons.math.special.Beta contains several useful functions involving the Beta Function.

Function	Method	Reference
Log Beta	logBeta	See Beta Function from MathWorld
Regularized Beta	regularizedBeta	See Regularized Beta Function from MathWorld