| n2 < n0 ∧ m0 < m ∧ n1 < n0 → m0 * n0 + n1 < m * n0 + n2, n < n0, m0 < m, m * n0 + n2 ≤ m0 * n + n1, n1 < n0, n1 < n, n2 < n0, n1 + 1 < n0 ⊦ n = 0, n0 = 0, m = 0, n = n0 |
m0 * n0 + n1 < m * n0 + n2, n < n0, m0 < m, m * n0 + n2 ≤ m0 * n + n1, n1 < n0, n1 < n, n2 < n0, n1 + 1 < n0 ⊦ n = 0, n0 = 0, m = 0, n = n0