gammaUpperIncomplete function

double gammaUpperIncomplete (double a, double x)

Returns the upper incomplete gamma function Gamma(a,x) = int(exp(-t)t^(a-1),t=0..x) for real a > 0, x > 0.

Implementation

double gammaUpperIncomplete(double a, double x) =>
    gammaUpperRegularized(a, x) * gamma(a);