pub(crate) fn kambe_with_bound(
n: i32,
z: Complex,
eta: Complex,
) -> (Complex, f64)Expand description
kambe with a first-order bound on the absolute rounding error of its value in
units of epsilon: from the series for I_-3 and I_-1, below the base pair from
the series or the downward recurrence that kambe takes, and above the base pair
propagated through the upward recurrence. Requires nonzero eta, and nonzero z
from order -1 up.