| ∃ i, j. rj = rational(i, j) ∧ 0 < j, 0 < j ⊦ (rational(i, j) * rj) * rj1 = rational(i, j) * rj * rj1 |
0 < j, 0 < j0 ⊦ (rational(i, j) * rational(i0, j0)) * rj1 = rational(i, j) * rational(i0, j0) * rj1
Used simplifier rules: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward)