theorem monetary_divergence_symmetric (T_h T_f : ℝ) : monetaryDivergenceFriction T_h T_f = monetaryDivergenceFriction T_f T_h := by simp only [monetaryDivergenceFriction, abs_sub_comm]
thesis/CESProofs/Applications/OpenEconomy.lean:223
Open Economy Monetary Transmission