theorem gaussCurvature_pos (hJ : 2 ≤ J) {ρ : ℝ} (hρ : ρ < 1) {c : ℝ} (hc : 0 < c) : 0 < gaussCurvature J ρ c := by simp only [gaussCurvature] exact pow_pos (curvature_pos hJ hρ hc) _
thesis/CESProofs/Foundations/IsoquantGeometry.lean:107
Differential Geometry of CES Isoquants (Gap #6)