pub(super) const SPECTRAL_SWITCH_LOSS: f64 = 1e-12;Expand description
Relative rounding error, on the scale of max(|S|, 1), from which a component of
a 1D spherical Ewald sum is taken from its spectral series instead, if that bounds
it more tightly. Derivatives count on the scale |dS| + max(|S|, 1) s with
s = |k| for length derivatives and 1 / |k| for inverse-length ones.