proposition: Lemma isrunit_Dcuts_mult_one : isrunit Dcuts_mult Dcuts_one.
proof: Proof. intros x. rewrite iscomm_Dcuts_mult. now apply islunit_Dcuts_mult_one. 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