English
There is a nontrivial linear order on a type with SuccOrder and IsSuccArchimedean, built from directedness and the duality with nuclei.
Русский
Существует ненулевой линейный порядок на типе с SuccOrder и IsSuccArchimedean, построенный через направленность и дуальность нуклеуса.
LaTeX
$$linearOrder on α with SuccOrder and IsSuccArchimedean$$
Lean4
theorem le_total_of_directed {r v₁ v₂ : α} (h₁ : v₁ ≤ r) (h₂ : v₂ ≤ r) : v₁ ≤ v₂ ∨ v₂ ≤ v₁ :=
Or.symm (le_total_of_codirected (α := αᵒᵈ) h₁ h₂)