cgamma cgamma_sub clgamma clgamma_sub crgamma crgamma_sub lgammas poch poch1 rgamma tgamma1pm1 tgammadratio tgammaratio

rgamma() double rgamma ( double  x ) Reciprocal of gamma function 1/Γ(x) Purpose rgamma computes the reciprocal of the gamma function at x. Returns Reciprocal of the gamma function 1/Γ(x). Parameters [in] x Argument x. Error handling If x is an negative integer, NaN is returned and domain error (EDOM) is reported. If x is 0, 0 is returned and range error (ERANGE) is reported. Other range error (ERANGE) may occur.