| stutf(nσ), (# nσ = ∞ ⊃ ∃ m. nσ[m] = n1 ∧ (∀ m0. m < m0 → nσ[m0] = n1 + 1);nσ[(# nσ).n - 1] = n1), ⌜n⌝ < # nσ, stutf(nσ), n1 + 1 < nσ[n] ⊦ nσ[n] = 0 |
⌜n⌝ < # nσ, stutf(nσ), n1 + 1 < nσ[n], (# nσ = ∞ ⊃ nσ[m] = n1 ∧ (∀ m0. m < m0 → nσ[m0] = nσ[m] + 1);nσ[(# nσ).n - 1] = n1) ⊦ nσ[n] = 0