theorem epsPQ_pos (e : TwoWorldEconomy N) (n : Fin N) : 0 < epsPQ e n := by simp only [epsPQ] exact div_pos (e.hℓ n) (e.hv n)
thesis/CESProofs/Dynamics/TwoWorldDefs.lean:60
Two-World Economy: Price vs. Production Timescale Separation