| Name: | Gammainc - incomplete gamma function
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| Synopsis: | x a Gammainc -> result
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| Description: | Computes the incomplete Gamma function
int(t^(a-1)*exp(-t), t=0..x) / Gamma(a)
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| Parameters: | x (double): upper limit of integration
a (double): order of Gamma function
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| Examples: | 2.2 1.5 Gammainc -> 0.778615
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| Author: | H E Plesser
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| FirstVersion: | 2001-07-26
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| Remarks: | This is the incomplete Gamma function P(a,x) defined as no. 6.5.1
in Abramowitz&Stegun. Requires the GSL.
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| References: | http://sources.redhat.com/gsl/ref
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| Source: | /home/abuild/rpmbuild/BUILD/nest-2.4.1/sli/specialfunctionsmodule.h
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