func CdfUgaussianPinv(p float64) float64 { return float64(C.gsl_cdf_ugaussian_Pinv(C.double(p))) }
// UgaussianPinv returns the inverse cumulative distribution function // Pinv(x) for the lower tail of a unit Gaussian. func UgaussianPinv(P float64) float64 { return float64(C.gsl_cdf_ugaussian_Pinv(C.double(P))) }