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Proof step 2 from proof numeral-2 (previous step)

m ≠ 0 ⊦ n +1 < m ↔ n < m -1

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: psh-07: ⊦ ¬ n < m -1 → ¬ n +1 < m;%psh-04: ⊦ n ≠ 0 → (m < n -1 ↔ m +1 < n);