proposition: Lemma Qplus_monotone_r : forall a, Qpos_monotone (Qpos_plus a).
proof: Proof. intros a x y Hxy. repeat rewrite -> Q_Qpos_plus. apply Qplus_le_compat. apply Qle_refl. assumption. Qed.
imports: Coq.Logic.Eqdep_dec Coq.QArith.QArith Coq.QArith.Qabs Coq.QArith.Qpower Coq.QArith.Qround CoRN.model.totalorder.QMinMax CoRN.order.TotalOrder