theorem safety_zone_shrinking {c_0 phi1 phi2 : ℝ} (hc : 0 < c_0) (hphi : phi1 < phi2) : (1 - phi2) * c_0 < (1 - phi1) * c_0 := by nlinarith
thesis/CESProofs/Applications/SettlementFeedback.lean:275
Paper 7: Settlement Feedback and Monetary Policy in a Mesh Economy