n∞ < ⌜m⌝ , m ≤ m0 ⊦ n∞ < ⌜m0⌝
Used simplifier rules: less-fin: ⊦ ⌜m⌝ < ⌜n⌝ ↔ m < n;% ⊦ m < n ↔ ¬ n ≤ m; (ss)