fn spherical_pair(kind: Bessel, order: f64, z: Complex) -> Result<[Complex; 2]>Expand description
Spherical functions of orders order and order + 1. Hankel functions share one
AMOS sequence, which agrees with single evaluations to 2e-14 relative. J and Y
sequences differ from single evaluations by up to 1e-12, so these stay single.