theorem superadditivity_bound_conservative (hJ : 2 ≤ J) {ρ : ℝ} (hρ : ρ < 1)
{c : ℝ} (hc : 0 < c) :
0 < sectionalCurvature J ρ c := by
simp only [sectionalCurvature]; exact sq_pos_of_pos (curvature_pos hJ hρ hc)Differential Geometry of CES Isoquants (Gap #6)