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

poch() double poch ( double  a, double  x  ) Pochhammer's symbol (a)x Purpose poch computes the Pochhammer's symbol (a)x = Γ(a + x)/Γ(a) Returns Pochhammer's symbol (a)x. Parameters [in] a Argument a. (If a + x = 0 or negative integer, a = 0 or negative integer) [in] x Argument x. Error handling If a + x = 0 or negative integer but a != 0 nor negative integer, domain error (EDOM) occurs. If the estimated precision is less than half, range error (ERANGE) occurs. Other range error (ERANGE) may occur.