func Cauchy(r *rng.GslRng, a float64) float64 { return float64(C.gsl_ran_cauchy((*C.gsl_rng)(unsafe.Pointer(r.Ptr())), C.double(a))) }
// Cauchy returns a random variate from the Cauchy distribution with scale parameter a. func Cauchy(rng RngState, a float64) float64 { return float64(C.gsl_ran_cauchy(rng.state, C.double(a))) }