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Proof step 1 from proof psh-01 (conclusion)

⊦ m < n0 → (n < n0 -1 ↔ n +1 < n0)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: f: ⊦ m < n → n ≠ 0;%psh-04: ⊦ n ≠ 0 → (m < n -1 ↔ m +1 < n);