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

clgamma_sub() void clgamma_sub ( doublecomplex  z, doublecomplex *  zout  ) Logarithm of gamma function ln(Γ(z)) (complex argument) Purpose clgamma_sub computes the logarithm of the gamma function at a complex number z. clgamma_sub is the subroutine version of clgamma. Parameters [in] z Argument z. (z != 0 and z != negative integer) [out] zout Logarithm of the gamma function ln(Γ(z)). Error handling If z is zero or real negative integer, domain error (EDOM) is reported. Range error (ERANGE) may occur. Reference netlib/cephes