| ¬(~(i / gcd(i, i0)) < 0 ∧ ~(i0 / gcd(i, i0)) < 0), 0 < i, i0 < 0 ⊦ i0 = 0, i = 0, rational(~(i / gcd(i, i0)), ~(i0 / gcd(i, i0))).num + i / gcd(i, i0) = 0 ∧ i0 / gcd(i, i0) + rational(~(i / gcd(i, i0)), ~(i0 / gcd(i, i0))).denom = 0 |
0 < i, i0 < 0 ⊦ i0 = 0, i = 0, rational(~(i / gcd(i, i0)), ~(i0 / gcd(i, i0))).num + i / gcd(i, i0) = 0 ∧ i0 / gcd(i, i0) + rational(~(i / gcd(i, i0)), ~(i0 / gcd(i, i0))).denom = 0
Used simplifier rules: ⊦ i0 < 0 → i0 / gcd(i, i0) ≤ 0;% ⊦ 0 < i → ¬ i / gcd(i, i0) ≤ 0;% ⊦ ¬ i < j ↔ j ≤ i;% ⊦ ~ i < 0 ↔ 0 < i;