def persistencePremium (J_high J_crit ρ c d_sq : ℝ) : ℝ := criticalFrictionReal J_high ρ c d_sq - criticalFrictionReal J_crit ρ c d_sq
thesis/CESProofs/Dynamics/RegimeShift.lean:130
Paper 3c, Section 3: First-Order Regime Shift