fact: Definition islunit_Lmax_Lbot : islunit (Lmax l) (Lbot l) := pr1 (pr2 (pr2 (pr2 l))).
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.Propositions UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.OrderTheory.Lattice.Lattice