theorem keff_below_critical (J : ℕ) (ρ T Tstar : ℝ)
(hTs : 0 < Tstar) (hT : T < Tstar) :
effectiveCurvatureKeff J ρ T Tstar =
curvatureK J ρ * (1 - T / Tstar) := by
simp only [effectiveCurvatureKeff]
congr 1
exact max_eq_right (by rw [sub_nonneg, div_le_one hTs]; exact le_of_lt hT)Phase Transition at T* (Gap #8)