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Proof step 1 from proof neq-02 (conclusion)

⊦ m < m0 ∧ n0 < n → m + n0 + 1 ≠ n + m0

System applied rule normalize

And obtained the following new goals

Proof step 2:
m + n0 + 1 = n + m0, m < m0, n0 < n ⊦

Rule argument

Additional information