⊦ n∞ = n∞1, n∞ < n∞1, n∞1 < n∞
Used simplifier rules: lele-trans: ⊦ ¬ n∞1 < n∞ ∧ ¬ n∞2 < n∞1 → ¬ n∞2 < n∞;%ls-irref: ⊦ ¬ n∞ < n∞;