theorem timescale_exponent (τ₀ T Tstar : ℝ) : adjustmentTimescale τ₀ T Tstar = τ₀ * (1 - T / Tstar)⁻¹ := by simp [adjustmentTimescale, div_eq_mul_inv]
thesis/CESProofs/CurvatureRoles/PhaseTransition.lean:167
Phase Transition at T* (Gap #8)