English
The class of concepts forms a bounded ordered set with explicit top and bottom elements.
Русский
Класс концептов образует ограниченное упорядоченное множество с верхним и нижним пределами.
LaTeX
$$$\mathrm{BoundedOrder}(\mathrm{Concept}\,\alpha\,\beta\,r)$$$
Lean4
instance instBoundedOrderConcept : BoundedOrder (Concept α β r)
where
top := ⟨univ, upperPolar r univ, rfl, eq_univ_of_forall fun _ _ hb => hb trivial⟩
le_top _ := subset_univ _
bot := ⟨lowerPolar r univ, univ, eq_univ_of_forall fun _ _ ha => ha trivial, rfl⟩
bot_le _ := intent_subset_intent_iff.1 <| subset_univ _