# logValue (3) - Linux Manuals

## logValue: Gamma function class.

## NAME

QuantLib::GammaFunction - Gamma function class.

## SYNOPSIS

#include <ql/math/distributions/gammadistribution.hpp>

Inherits std::unary_function<Real,Real>.

### Public Member Functions

## Detailed Description

Gamma function class.

This is a function defined by [ Gamma(z) = int_0^{infty}t^{z-1}e^{-t}dt ]

The implementation of the algorithm was inspired by 'Numerical Recipes in C', 2nd edition, Press, Teukolsky, Vetterling, Flannery, chapter 6

**Tests**

- the correctness of the returned value is tested by checking it against known good results.

## Author

Generated automatically by Doxygen for QuantLib from the source code.