| (∀ n0. ∃ n1. n0 < n1 ∧ ¬ n < n1 ∧ nσ[n1] = nσ[n]) ∨ (∀ n0. ¬(¬ n < n0 ∧ nσ[n0] = nσ[n])), leninv(nσ) = ⌜n1⌝ , # nσ = ⌜n⌝ + ⌜1⌝ , stutf(nσ), nσ[n] < n1 ⊦ ∞.n = n |
leninv(nσ) = ⌜n1⌝ , # nσ = ⌜n⌝ + ⌜1⌝ , stutf(nσ), nσ[n] < n1, (∀ n0. ∃ n1. n0 < n1 ∧ ¬ n < n1 ∧ nσ[n1] = nσ[n]) ∨ (∀ n0. n < n0 ∨ nσ[n0] ≠ nσ[n]) ⊦ ∞.n = n