| prime(i), 0 < j, i | j ∨ i | fac(j - 1), prime(i), j < i, 1 < i, 0 < i, 0 < j, ∀ j0, i. i→n(j0) < i→n(j) → true → prime(i) ∧ j0 < i ∧ 0 < j0 → ¬ i | fac(j0) ⊦ |
prime(i), j < i, 1 < i, 0 < i, 0 < j, i | fac(j - 1), ∀ j0, i. i→n(j0) < i→n(j) → true → prime(i) ∧ j0 < i ∧ 0 < j0 → ¬ i | fac(j0) ⊦
Used simplifier rules: div-not-ls: ⊦ i < j ∧ 0 < i → ¬ j | i; from specification int-gcd