pub fn intrinsic_chord_bound2(curve: &Intrinsic2, a: f64, b: f64) -> Option<f64>Expand description
Certified chord bound of a 2D intrinsic curve over [a, b]:
h^2 / 8 sigma sup |k|, across seams of its law too. None outside
[0, length] or for a law with no closed-form bound.