| prime(i) ∧ 0 < j0, ∀ j1, i, j. i→n(j1) < i→n(j0) → prime(i) ∧ 0 < j1 → (i | j ^ j1 ↔ i | j) ∨ j = 0 ⊦ (i | j ^ j0 ↔ i | j) ∨ j = 0 |
prime(i), 0 < j0, ∀ j1, i, j. i→n(j1) < i→n(j0) → prime(i) ∧ 0 < j1 → (i | j ^ j1 ↔ i | j) ∨ j = 0 ⊦ i | j ^ j0 ↔ i | j, j = 0