| # nσ = ⌜m0⌝ + ⌜1⌝ , max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n) = ∞, n < nσ[m0], max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n).n + m + 1 < max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n + 1).n, stutf(nσ) ⊦ nσ[max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n).n + m + 1] = n + 1 |
# nσ = ⌜m0⌝ + ⌜1⌝ , max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n) = ∞, ∞.n + m + 1 < max∞(λ n0. ¬ m0 < n0 ∧ nσ[n0] = n + 1).n, n < nσ[m0], stutf(nσ) ⊦ nσ[∞.n + m + 1] = n + 1