theorem efficiencyGap_nonneg {K T Tstar : ℝ} (hK : 0 ≤ K) (hT : 0 ≤ T) (hTs : 0 < Tstar) :
0 ≤ efficiencyGap K T Tstar := by
simp only [efficiencyGap]
apply div_nonneg
· exact mul_nonneg hK hT
· linarithCore definitions for the Lean formalization of Paper 3: