| ¬ max(x2 + x0) < a, max(x2 + x0) = max(x2), ordered≤(x0), x1 ⊑ x0, ∀ x, x3. max(x2 + x) = max(x2) ∧ ordered≤(x) ∧ x3 ⊑ x → max(x2 + x3) = max(x2) ⊦ max(x2 + x1) = max(x2), x2 + x1 = [], x2 = [], x2 + x0 = [], max(x2 + x1) < a, max(x2) < a |
max(x2 + x0) = max(x2), ordered≤(x0), x1 ⊑ x0, ∀ x, x3. max(x2 + x) = max(x2) ∧ ordered≤(x) ∧ x3 ⊑ x → max(x2 + x3) = max(x2) ⊦ max(x2 + x1) = max(x2), x2 + x1 = [], x2 = [], x2 + x0 = [], max(x2 + x1) < a, max(x2) < a