| i * j0 = i0 * j, 0 < j, 0 < j0 ⊦ rational(i, j) = rational(i0, j0) |
i * j0 = i0 * j, 0 < j, 0 < j0, 0 < i, 0 < i0 ⊦ rational(i, j) = rational(i0, j0)
i * j0 = i0 * j, 0 < j, 0 < j0 ⊦ 0 < i ∧ 0 < i0, rational(i, j) = rational(i0, j0)
Used terms: i, j0, i0, j