proposition: Lemma isrunit_Dcuts_plus_zero : isrunit Dcuts_plus 0.
proof: Proof. intros x. rewrite iscomm_Dcuts_plus. now apply islunit_Dcuts_plus_zero. 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