pub fn wigner_small_d(l: i32, m: i32, k: i32, theta: Complex) -> Result<Complex>Expand description
Wigner small-d element d^l_(mk)(theta) at a real or complex angle, without a matrix.
Orders with |m| > l or |k| > l give zero.
Upstream: treams.special.wignersmalld. Differences: degrees above 128 and
non-finite angles give an error.