| (max(x0) < a ⊃ a;max(x0)) = a, ordered≤(x0), x1 ⊑ x0, a < max(x1) ⊦ x0 = [], max(x1) = a, x1 = [] |
max(x0) < a, a = a, ordered≤(x0), x1 ⊑ x0, a < max(x1) ⊦ x0 = [], max(x1) = a, x1 = []
¬ max(x0) < a, max(x0) = a, ordered≤(x0), x1 ⊑ x0, a < max(x1) ⊦ x0 = [], max(x1) = a, x1 = []