Function rgsl::coupling_coefficients::_9j

pub fn _9j(two_ja: i32, two_jb: i32, two_jc: i32, two_jd: i32, two_je: i32, two_jf: i32, two_jg: i32, two_jh: i32, two_ji: i32) -> f64

This routine computes the Wigner 9-j coefficient,

{ja jb jc jd je jf jg jh ji} where the arguments are given in half-integer units, ja = two_ja/2, ma = two_ma/2, etc.