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Proof step 9 from proof fermat-1 (previous step)

prime(j), i ≤ 0 ⊦ i = 0, ≡mod(i ^ j, i, j)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
prime(j), i < 0 ⊦ i = 0, ≡mod(i ^ j, i, j)

Rule argument

Additional information

Used simplifier rules: forward-le-02: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward) from specification int-abs%lels-02: ⊦ i ≠ j → (i ≤ j ↔ i < j); from specification int-abs