gammai gammaic gammait gammap gammapd gammapi gammapia gammaq gammaqi gammaqia

gammaic() double gammaic ( double  a, double  x  ) Complementary incomplete gamma function Γ(a, x) Purpose gammaic computes the complementary incomplete gamma function Γ(a, x). Γ(a, x) = ∫ t^(a-1)*exp(-t) dt [x, ∞] Returns Complementary incomplete gamma function Γ(a, x) Parameters [in] a Argument a. (a > 0) [in] x Argument x. (x >= 0) Error handling If a <= 0 or x < 0, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions