⊦ j ≤ (* i1) * j + i ↔ 0 ≤ (i1 - 1) * j + i
j < j0, j < 0, j < i0 * j + j0, 0 < i0, j0 < i0, j0 ≤ 0, 0 ≤ (i0 - 1) * j + j0 ⊦ i0 = 0
Used terms: j0, i0, j