proposition: Lemma QposRed_prf : forall (a:Q), (0 < a) -> (0 < Qred a).
proof: Proof. intros a Ha. rewrite -> Qred_correct. assumption. Qed.
imports: Coq.QArith.QArith Coq.QArith.Qpower CoRN.model.ordfields.Qordfield CoRN.algebra.COrdFields2 Coq.Logic.Eqdep_dec CoRN.tactics.CornTac Coq.QArith.Qround Coq.QArith.Qabs CoRN.stdlib_omissions.Q