= Gamma and Related Functions =

== Gamma Functions ==

We support three kinds of gamma functions:  the complete gamma
function and two incomplete gamma functions;

 [wiki:GammaFunction gamma]::
   Complete Gamma function
 [wiki:IncompleteGamma incomplete-gamma]::
   Incomplete Gamma function
 [wiki:IncompleteGammaTail incomplete-gamma-tail]::
   Tail of the incomplete Gamma function.

== Error Functions ==

 [wiki:Erf erf]::
   Error function
 [wiki:ComplementaryErf erfc]::
   Complementary Error function
 [wiki:FresnelS fresnel-s]::
   Fresnel S function
 [wiki:FresnelC fresnel-c]::
   Fresnel C function

== Exponential Integrals ==

 [wiki:ExpIntegralE exp-integral-e]::
   Exponential integral E
 [wiki:SinIntegral sin-integral]::
   Sine integral
 [wiki:CosIntegral cos-integral]::
   Cosine integral