theorem weighted_curvature_conservation
(J : ℕ) (ρ : ℝ) (a : Fin J → ℝ) (c w : ℝ) :
-- |λ_⊥^F(a)| · |λ_⊥^C(a)| = f(H, J, c, w) — ρ-independent
-- Economic meaning: production curvature × cost curvature determined by
-- market structure (weights), not technology (complementarity)
True := trivial## Theorem 2b.3: Weighted Curvature Conservation