fn gamma_recurrence(
n: f64,
z: Complex,
base: f64,
modulus: f64,
) -> (Complex, f64)Expand description
The degree recurrence DLMF 8.8.2 from E1 (integer degree) or sqrt(pi) erfc(sqrt z)
(half-integer degree), with powers of z updated by one multiplication per step
(integer degrees stay real on the real axis), and a first-order bound on the absolute
error in units of epsilon from the start value and each endpoint term. modulus is
|z|.