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Proof step 1 from proof one-02 (conclusion)

⊦ m ≠ 0 → (m ≤ 1 ↔ m = 1)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: lels-02: ⊦ m ≠ n → (m ≤ n ↔ m < n);%one-01: ⊦ m < 1 ↔ m = 0; from specification nat-basic1