j < 0, 0 < j0 ⊦ (i % (j * j0)) % j = i % j, j = 0, 0 < j ∧ 0 ≤ i
0 < j0 ⊦ j < 0, (i % (j * j0)) % j = i % j, j = 0, 0 < j ∧ 0 ≤ i
Used formulas: j < 0