Cgamma Cgamr Clngam Gamdratio Gamma Gamma1pm1 Gamr Gamratio Lngam Lngams Poch Poch1

Gamdratio() Function Gamdratio ( A As  Double, Delta As  Double, Optional Info As  Long  ) Ratio of gamma functions Γ(a)/Γ(a+δ) Purpose This routine computes the ratio of gamma functions Γ(a)/Γ(a+δ). The result is calculated accurately even when δ is small compared to a. Returns Double Ratio of gamma functions Γ(a)/Γ(a+δ). Parameters [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