fact: Definition islunit_Lmin_Ltop : islunit (Lmin l) (Ltop l) := pr2 (pr2 (pr2 (pr2 l))).
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.Propositions UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.OrderTheory.Lattice.Lattice