| 0 < j / gcd(i, j) * i0 / gcd(i0, j0) ∧ 0 < j * i0, 0 < i, 0 < i0, 0 < j, 0 < j0 ⊦ j = 0, i = 0, j0 = 0, i0 = 0, (i / gcd(i, j) * j0 / gcd(i0, j0)) * j * i0 = (i * j0) * j / gcd(i, j) * i0 / gcd(i0, j0) |
0 < i, 0 < j, 0 < j0, 0 < i0, 0 < j / gcd(i, j) * i0 / gcd(i0, j0) ⊦ j = 0, i = 0, j0 = 0, i0 = 0, (i / gcd(i, j) * j0 / gcd(i0, j0)) * j * i0 = (i * j0) * j / gcd(i, j) * i0 / gcd(i0, j0)
Used simplifier rules: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward)% ⊦ i * j = j * i;% ⊦ i * j * j0 = (i * j) * j0;% ⊦ 0 < i → (0 < i * j ↔ 0 < j);