_cgamma _cgamma_sub _clgamma _clgamma_sub _crgamma _crgamma_sub _lgammas _poch _poch1 _rgamma _tgamma1pm1 _tgammadratio _tgammaratio

_cgamma() double _Complex _cgamma ( double _Complex  z ) Gamma function Γ(z) (complex argument) Purpose cgamma computes the gamma function at a complex number z. Returns Gamma function Γ(z). Parameters [in] z Argument z. (z != 0 and z != negative integer) Error handling If z is zero or real negative integer, domain error (EDOM) is reported. Range error (ERANGE) may occur. Reference netlib/cephes