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