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Proof step 9 from proof cong-neg (previous step)

⊦ j | i0 - i ↔ j | ~(i0 - i)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: int-gcd inst: name: div-neg seq: ⊦ i | ~ j ↔ i | j subst: [j, i] → [i0 - i, j] flags: rewrite

Additional information

Used terms: i0 - i, j