| prime(j), prime(j0), 0 < i, 0 ≤ i0, ≡mod(i ^ i0, i, j), j0 | i ^ i0 - i ⊦ j = j0, j * j0 | i ^ i0 - i |
⊦ ≡mod(i, i0, j) ↔ j | abs(i - i0)
prime(j), prime(j0), 0 < i, 0 ≤ i0, j | abs(i ^ i0 - i), j0 | i ^ i0 - i ⊦ j = j0, j * j0 | i ^ i0 - i
Used terms: j, i, i ^ i0