func CdfGammaQ(x float64, a float64, b float64) float64 { return float64(C.gsl_cdf_gamma_Q(C.double(x), C.double(a), C.double(b))) }
// GammaQ returns the cumulative distribution function Q(x) for // the upper tail of a gamma distribution. func GammaQ(x, a, b float64) float64 { return float64(C.gsl_cdf_gamma_Q(C.double(x), C.double(a), C.double(b))) }