| ¬ ¬ gcd(abs(i), abs(j)) < gcd(abs(j), j0), abs(i) = i0 * abs(j) + j0, 0 ≤ i0, 0 ≤ j0, j0 < abs(j) ⊦ j = 0, gcd(abs(i), abs(j)) = gcd(abs(j), j0) |
abs(i) = i0 * abs(j) + j0, gcd(abs(i), abs(j)) < gcd(abs(j), j0), 0 ≤ i0, 0 ≤ j0, j0 < abs(j) ⊦ j = 0, gcd(abs(i), abs(j)) = gcd(abs(j), j0)