| 2 * j + j0 = (j0 + j) + j, j * (i1 + i0) + j1 = i2 * j + j0, 0 < j1, 1 < j1, 0 < j + j0, j0 < 0, 0 ≤ i1 * j + j1, 0 < j, 1 < j, i0 < 0, j1 < j, j0 < j, j0 < j1, i2 * j + j0 < 0, j0 ≤ j1, j0 + j < j1, 2 * j + j0 < j, j0 + j < j, 2 * j + j0 ≤ j1 ⊦ j1 = j0 + j, j1 = 0, j0 = 0 |
2 * j + j0 = (j0 + j) + j, j * (i1 + i0) + j1 = i2 * j + j0, 0 < j1, 1 < j1, 0 < j + j0, j0 < 0, 0 ≤ i1 * j + j1, 0 < j, 1 < j, i0 < 0, j1 < j, j0 < j, j0 < j1, i2 * j + j0 < 0, j0 ≤ j1, j0 + j < j1, (j0 + j) + j < j, j0 + j < j, (j0 + j) + j ≤ j1 ⊦ j1 = j0 + j, j1 = 0, j0 = 0