| i0 < sum(ar0, n, m), n + m ≤ # ar0, ∀ n, m. (n + m ≤ # ar → sum(ar, n, m) ≤ i) → n + m ≤ # ar0 → sum(ar0, n, m) ≤ i0, ∀ n, m. n + m ≤ # ar → sum(ar, n, m) ≤ i ⊦ |
i0 < sum(ar0, n, m), n + m ≤ # ar0, (n + m ≤ # ar → sum(ar, n, m) ≤ i) → n + m ≤ # ar0 → sum(ar0, n, m) ≤ i0, ∀ n, m. n + m ≤ # ar → sum(ar, n, m) ≤ i, ∀ n, m. (n + m ≤ # ar → sum(ar, n, m) ≤ i) → n + m ≤ # ar0 → sum(ar0, n, m) ≤ i0 ⊦
Used terms: n, m