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Proof step 1 from proof eq (conclusion)

⊦ m < n → (¬ m +1 < n ↔ n = m +1)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: lrec: ⊦ m +1 < n +1 ↔ m < n;%ref-1: ⊦ ¬ n < n;%neq-01: ⊦ m ≠ n → (¬ m < n ↔ n < m);%s: ⊦ m < n +1 ↔ ¬ n < m;