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Proof step 54 from proof gcd-rec-sub-03 (previous step)

⊦ abs(i0) = gcd(i0, i0)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 55:
⊦ i ≠ 0 → gcd(i, i) = abs(i)

Rule argument

spec: int-gcd inst: name: gcd-same seq: ⊦ i ≠ 0 → gcd(i, i) = abs(i) subst: [i] → [i0] flags: rewrite, current

Additional information

Used simplifier rules: gcd-zero: ⊦ gcd(0, 0) = 0; Used terms: i0