proposition: Lemma Lmax_le_eq_l : ∏ x y : X, Lle lat y x → Lmax lat x y = x.
proof: Proof. intros x y <-. rewrite iscomm_Lmin. apply Lmax_absorb. Qed.
imports: UniMath.MoreFoundations.All UniMath.Algebra.Monoids UniMath.Algebra.Groups