0 < j, j0 < j, 0 ≤ i0, 0 ≤ j0, 0 ≤ j, i→n(j) ≤ i→n(j0) ⊦ i→n(j0) = i→n(j0) % i→n(j)
Used simplifier rules: ⊦ m < n ↔ ¬ n ≤ m; (ss)