theorem sectorCurvature_pos (e : NSectorEconomy N) (n : Fin N) : 0 < sectorCurvature e n := by unfold sectorCurvature exact curvatureK_pos (e.hJ n) (e.hρ n)
thesis/CESProofs/Dynamics/MultiplierCycles.lean:38
Multiplier-Cycle Duality in a Multi-Sector Economy