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Proof step 9 from proof fle (previous step)

m < n, n ≤ n0, n0 ≤ m ⊦ ¬ m < n0, n = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 10:
m < n0, m < n, n ≤ n0, n0 ≤ m ⊦ n = 0, n0 = 0

Rule argument

Additional information

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