⊦ mon<(nσ) ↔ (∀ n. ⌜n⌝ + ⌜1⌝ < # nσ → nσ[n] < nσ[n + 1])
mon<(⌜nl⌝ + ⌜nl0⌝ ) ⊦ ∀ n. ⌜n⌝ + ⌜1⌝ < # ⌜nl⌝ → ⌜nl⌝ [n] < ⌜nl⌝ [n + 1]
Used terms: ⌜nl⌝