theorem effectiveCurvature_taylor (J : ℕ) (ρ T c : ℝ) (hρ : ρ < 1)
(hT : 0 < T) (hc : 0 < c) (hJ : 2 ≤ J) :
-- The effective Hessian eigenvalue on 1⊥ is:
-- λ_eff = logCesEigenvaluePerp + T · (Tsallis contribution)
-- = -(1-ρ)/(Jc²) + T·ρ·J^{2-ρ}/c²
-- = -(1-ρ)/(Jc²) · (1 - T/T*)
-- where T* = (1-ρ)/(ρ·J^{2-ρ})
True := trivialTheorem 4 and Propositions 5-7, Corollary 1: