theorem adjustmentTimescale_at_zero {τ₀ Tstar : ℝ} (_hTs : 0 < Tstar) : adjustmentTimescale τ₀ 0 Tstar = τ₀ := by simp [adjustmentTimescale]
thesis/CESProofs/Potential/EffectiveCurvature.lean:232
Theorem 4 and Propositions 5-7, Corollary 1: