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Proof step 85 from proof inv-get-inverse (previous step)

stutf(nσ), max∞(λ n0. ⌜n0⌝ < # nσ ∧ nσ[n0] = n) = ⌜n1⌝ , (# nσ = ∞ ⊃ ∃ m. nσ[m] = n2 ∧ (∀ m0. m < m0 → nσ[m0] = n2 + 1);nσ[(# nσ).n - 1] = n2), stutf(nσ), n ≤ n2 ⊦ nσ[n1] = n

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 86:
max∞(λ n0. ⌜n0⌝ < # nσ ∧ nσ[n0] = n) = ⌜n1⌝ , stutf(nσ), n ≤ n2, (# nσ = ∞ ⊃ nσ[m] = n2 ∧ (∀ m0. m < m0 → nσ[m0] = nσ[m] + 1);nσ[(# nσ).n - 1] = n2) ⊦ nσ[n1] = n

Proof step 85 from proof inv-get-inverse (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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