proposition: Lemma joinIl : left_distributive (@join _ L) (@meet _ L).
proof: Proof. by move=> x y z; rewrite meetUr joinIK meetUl -joinA meetUKC. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)