| n = n1 + n2, m * n = m * n2 + n0, n2 ≤ n ⊦ m * n1 = n0 |
m * (n1 + n2) = m * n2 + n0 ⊦ m * n1 = n0
Used simplifier rules: c: ⊦ m + n = n + m; from specification nat-basic2%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic2%lep: ⊦ m ≤ m + n; from specification nat