gammai gammaic gammait gammap gammapd gammapi gammapia gammaq gammaqi gammaqia

gammaqia() double gammaqia ( double  x, double  q  ) Inverse function of a for normalized complementary incomplete gamma function Q(a, x) Purpose gammaqia computes the inverse function of a for normalized complementary incomplete gamma function Q(a, x). Returns Inverse function of a for normalized complementary incomplete gamma function Q(a, x). Parameters [in] x Argument x. (x >= 0) [in] q Argument q. (0 <= q <= 1) Error handling If x < 0, q < 0 or q > 1, domain error (EDOM) occurs. Range error (ERANGE) may occur. Reference boost/math/special_functions