func Lnchoose(n uint32, m uint32) float64 { return float64(C.gsl_sf_lnchoose(C.uint(n), C.uint(m))) }
/* log(n choose m) */ func LnChoose(n, m uint32) (r float64) { r = float64(C.gsl_sf_lnchoose(C.uint(n), C.uint(m))) return }