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Proof step 2 from proof gcd-zero-01 (previous step)

gcd(m, n) = 0 ⊦ m = 0 ∧ n = 0

User applied rule cut formula

And obtained the following new goals

Proof step 3:
gcd(m, n) = 0 ⊦ m = n, m = 0 ∧ n = 0

Rule argument

fma: m = n

Additional information

Used simplifier rules: gcd-id: ⊦ gcd(m, m) = m; Used formulas: m = n