func CdfExponentialPinv(p float64, mu float64) float64 { return float64(C.gsl_cdf_exponential_Pinv(C.double(p), C.double(mu))) }
// ExponentialPinv returns the inverse cumulative distribution function Pinv(x) for // the lower tail of an exponential distribution. func ExponentialPinv(P, mu float64) float64 { return float64(C.gsl_cdf_exponential_Pinv(C.double(P), C.double(mu))) }