theorem degradation_monotone {T₁ T₂ Tstar : ℝ} (hTs : 0 < Tstar)
(h12 : T₁ ≤ T₂) :
max 0 (1 - T₂ / Tstar) ≤ max 0 (1 - T₁ / Tstar) := by
apply max_le_max_left 0
apply sub_le_sub_left
exact div_le_div_of_nonneg_right h12 (le_of_lt hTs)Theorem 4 and Propositions 5-7, Corollary 1: