i < 0, 0 < j ⊦ (2 * i - 1) / (2 * j) = i / j
i < 0, 0 < j ⊦ (2 * (i + 1) - 1) / (2 * j) = (i + 1) / j, i + 1 < 0 ∧ 0 < j
Used terms: j, i + 1