| i / i0 + j / i0 < i0, i / i0 + j / i0 < i + j, 0 ≤ i + j, i / i0 + j / i0 < 0, 0 < i0, (i / i0 + j / i0) + 1 < i0, 0 ≤ i, i / i0 + j / i0 < i ⊦ |
⊦ 0 < j ∧ 0 ≤ i → (i0 = i / j ∧ j0 = i % j ↔ i = i0 * j + j0 ∧ 0 ≤ j0 ∧ j0 < j)
i = i1 * i0 + j0 ∧ 0 ≤ j0 ∧ j0 < i0, i1 + j / i0 < i0, i1 + j / i0 < i + j, 0 ≤ i + j, i1 + j / i0 < 0, 0 < i0, (i1 + j / i0) + 1 < i0, 0 ≤ i, i1 + j / i0 < i ⊦
Used terms: i, i0, i1, j0