fn order_zero(
v: f64,
y: f64,
frac_cot: f64,
slopes: Slopes,
) -> Result<OrderZero>Expand description
OrderZero at degree ν: the logarithmic expansion at the largest degree ν₀ ≡ ν
(mod 1) with (ν₀ + 1/2) θ small, then the degree recurrence (μ = 0) for both solutions.
Only the requested slopes are formed, unless the recurrence needs both.