theorem generalKeff_zero_friction
{J : ℕ} {ρ : ℝ} {a : Fin J → ℝ} {Tstar : ℝ} (_hTs : 0 < Tstar) :
generalEffectiveCurvatureKeff J ρ a 0 Tstar
= generalCurvatureK J ρ a := by
unfold generalEffectiveCurvatureKeff
simp [zero_div, sub_zero, mul_one]## General-Weight Effective Curvature Theorems