| i + j = i0 * 2 + j0, j0 < 2, i0 < i, i0 < j, 0 < i, 0 < j, i ≤ j, 0 ≤ i + j, 0 ≤ i0, 0 ≤ j0 ⊦ |
i + j = i0 * 2 + j0, j0 = 1, 0 < j, 0 < i, i0 < j, i0 < i, j0 < 2, 0 ≤ j0, 0 ≤ i0, 0 ≤ i + j, i ≤ j ⊦
i + j = i0 * 2 + j0, 0 < j, 0 < i, i0 < j, i0 < i, j0 < 2, 0 ≤ j0, 0 ≤ i0, 0 ≤ i + j, i ≤ j ⊦ j0 = 1
Used formulas: j0 = 1