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Proof step 1 from proof leninv-succ (conclusion)

⊦ stutf(nσ) → (leninv(nσ) = ⌜n⌝ + ⌜1⌝ ↔ (# nσ = ∞ ⊃ ∃ m. nσ[m] = n ∧ (∀ m0. m < m0 → nσ[m0] = n + 1);nσ[(# nσ).n - 1] = n))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information