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Proof step 1 from proof even-05 (conclusion)

⊦ m + m = (m0 + m0) + n → ¬ m < m0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
m + m = (m0 + m0) + n, m < m0 ⊦ m0 = 0

Rule argument

Additional information

Used simplifier rules: f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic1