proposition: Fact meetUl : left_distributive (@meet T T') (@join T T').
proof: Proof. by move=> ? ? ?; congr pair; rewrite meetUl. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(path fintype tuple bigop finset div prime finfun) mathcomp(finset)