Cgamma Cgamr Clngam Gamdratio Gamdratio_sub Gamma Gamma1pm1 Gamma1pm1_sub Gamr Gamr_sub Gamratio Gamratio_sub Lngam Lngam_sub Lngams Lngams_sub Poch Poch1 Poch1_sub Poch_sub

Gamdratio_sub() Sub Gamdratio_sub ( Ret As  Double, A As  Double, Delta As  Double, Optional Info As  Long  ) Ratio of gamma functions Γ(a)/Γ(a + δ) (Subroutine version) Purpose Computes the ratio of gamma functions Γ(a)/Γ(a + δ). The result is computed accurately even when δ is small compared to a. Parameters [out] Ret Ratio of gamma functions Γ(a)/Γ(a + δ). [in] A Argument a. (A > 0) [in] Delta Argument δ. (A + Delta > 0) [out] Info = 0: Successful exit. = -1: The argument A had an illegal value. (A <= 0) = -2: The argument Delta had an illegal value. (A + Delta <= 0) = 1: Floating point range error. Reference boost/math/special_functions