proposition: Lemma issymm_Dcuts_eq : issymm Dcuts_eq.
proof: Proof. intros x y Hxy r. split. - exact (pr2 (Hxy r)). - exact (pr1 (Hxy r)). Qed.
imports: UniMath.MoreFoundations.Orders UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.Notations UniMath.RealNumbers.Sets UniMath.Algebra.ConstructiveStructures UniMath.OrderTheory.Lattice.Lattice UniMath.RealNumbers.Prelim UniMath.RealNumbers.NonnegativeRationals