theorem discountGap_solow_still_dynamic {D₀ γ τ : ℝ} (hγ : 0 < γ) (hτ : 0 < τ) : D₀ < discountGap D₀ γ τ := by simp only [discountGap] linarith [mul_pos hγ hτ]
thesis/CESProofs/Macro/GrowthTax.lean:183
Growth and Dynamic Tax Revenue (Layer 4-5 of Macro Extension)