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Proof step 8 from proof gcd-zero-05 (previous step)

gcd(i, j) + gcd(i0, j0) = 0 ⊦ gcd(i, j) = 0

User applied rule insert lemma

And obtained the following new goals

Proof step 9:
⊦ 0 ≤ gcd(i, j)
Proof step 10:
0 ≤ gcd(i, j), gcd(i, j) + gcd(i0, j0) = 0 ⊦ gcd(i, j) = 0

Rule argument

spec: int-gcd inst: name: gcd-pos seq: ⊦ 0 ≤ gcd(i, j) subst: [i, j] → [i, j] flags: current, []

Additional information

Used terms: i, j