⊦ i | j ↔ (∃ i0. i * i0 = j)
0 < j, 0 ≤ j, 2 ≤ j, ∀ i. 1 < i ∧ i < j → ¬ i | j, ∃ i0. i * i0 = j ⊦ abs(i) = j, abs(i) = 1
Used terms: j, i