Algebraic Lattices

Let L be a non empty reflexive relational structure. The functor CompactSublatt (L) yielding a strict full relational substructure of L is defined as follows: (Def. 1) For every element x of L holdsx∈ the carrier of CompactSublatt (L) iff x is compact. Let L be a lower-bounded non empty reflexive antisymmetric relational structure. Observe that CompactSublatt (L) is non empty. We now state three propositions: