std.internal.math.gammafunction

Implementation of the gamma and beta functions, and their integrals.
License
Boost License 1.0.
Copyright
Based on the CEPHES math library, which is
Copyright (C) 1994 Stephen L. Moshier (moshier@world.std.com).
Authors
Stephen L. Moshier (original C code). Conversion to D by Don Clugston

Functions 12

fnreal gamma(real x) pure nothrow @safe @nogcThe Gamma function, (x)

fnreal logGamma(real x) pure nothrow @safe @nogcNatural logarithm of gamma function.

fnreal sgnGamma(in real x) pure nothrow @safe @nogcsgn((x))

fnreal beta(in real x, in real y) pure nothrow @safe @nogcB(x,y)

fnreal betaIncomplete(real aa, real bb, real xx ) pure nothrow @safe @nogcIncomplete beta integral

fnreal betaIncompleteInv(real aa, real bb, real yy0 ) pure nothrow @safe @nogcInverse of incomplete beta integral

fnreal gammaIncomplete(real a, real x ) pure nothrow @safe @nogcIncomplete gamma integral and its complement

fnreal gammaIncompleteCompl(real a, real x ) pure nothrow @safe @nogcditto

fnreal gammaIncompleteComplInv(real a, real p) pure nothrow @safe @nogcInverse of complemented incomplete gamma integral

fnreal digamma(real x) pure nothrow @safe @nogcDigamma function

fnreal logmdigamma(real x) pure nothrow @safe @nogcLog Minus Digamma function

fnreal logmdigammaInverse(real y) pure nothrow @safe @nogcInverse of the Log Minus Digamma function

varreal [7] Bn_n