proposition: Lemma plusNonnegativeRationals_minus_l : ∏ q r : NonnegativeRationals, (q + r) - q = r.
proof: Proof. intros q r. rewrite iscomm_plusNonnegativeRationals. now apply plusNonnegativeRationals_minus_r. Qed.
imports: UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Sets UniMath.MoreFoundations.Orders UniMath.RealNumbers.Sets UniMath.RealNumbers.Fields UniMath.Algebra.DivisionRig UniMath.OrderTheory.Lattice.Lattice UniMath.RealNumbers.Prelim