proposition: Lemma Qpos_nonzero : forall x:Qpos, (x:Q)[#]0.
proof: Proof. intros ?. apply: pos_ap_zero. apply Qpos_prf. 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