WGami WGamic WGamit WGammap WGammapd WGammapi WGammapia WGammaq WGammaqi WGammaqia

WGammapd() Function WGammapd ( A As  Double, X As  Double  ) Derivative of normalized incomplete gamma function P(a, x) Purpose This function computes the derivative of normalized incomplete gamma function P(a, x) with respect to x. d/dx P(a, x) = exp(-x)*x^(a-1)/Γ(a) Returns Derivative of normalized incomplete gamma function P(a, x) with respect to x. Parameters [in] A Argument a. (A > 0) [in] X X As Double Argument x. (X >= 0) Reference boost/math/special_functions