Gammainc

Command: Gammainc


Description
Computes the incomplete Gamma function
int(t^(a-1)*exp(-t) t=0..x) / Gamma(a)

Parameters
x (double): upper limit of integration
a (double): order of Gamma function

Author
H E Plesser

Synopsis
x a Gammainc -> result

References
http://sources.redhat.com/gsl/ref
Examples
2.2 1.5 Gammainc -> 0.778615

File
sli/specialfunctionsmodule.h
Remarks
This is the incomplete Gamma function P(a x) defined as no. 6.5.1
in Abramowitz&Stegun. Requires the GSL.

FirstVersion