⊦ mon<(nσ) ∧ m < n ∧ ⌜n⌝ < # nσ → nσ[m] < nσ[n]
mon<(nσ) ∧ n < n0 ∧ ⌜n0⌝ < # nσ → nσ[n] < nσ[n0], nσ[n] = nσ[n0], mon<(nσ), ⌜n⌝ < # nσ, ⌜n0⌝ < # nσ ⊦ n = n0
Used terms: nσ, n, n0