def geodesicDistSq (J : ℕ) (x y : Fin J → ℝ) : ℝ := ∑ j : Fin J, ((x j / ∑ i, x i) - (y j / ∑ i, y i)) ^ 2
thesis/CESProofs/CurvatureRoles/Superadditivity.lean:25
Superadditivity of CES (Paper 1, Section 6):