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