proposition: Lemma CRnonNegQpos : forall e : Qpos, CRnonNeg (' ` e).
proof: Proof. intros [e e_pos]; apply CRnonNeg_criterion; simpl. intros q A; apply Qlt_le_weak, Qlt_le_trans with (y := e); trivial. now apply CRle_Qle. Qed.
imports: CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.model.totalorder.QMinMax CoRN.model.totalorder.QposMinMax Coq.setoid_ring.Ring_theory Coq.Setoids.Setoid Coq.QArith.QArith Coq.QArith.Qabs Coq.QArith.Qround CoRN.metric2.Complete CoRN.metric2.ProductMetric CoRN.reals.fast.CRFieldOps CoRN.model.metric2.Qmetric CoRN.logic.Stability Coq.Logic.ConstructiveEpsilon CoRN.util.Qdlog MathClasses.interfaces.abstract_algebra MathClasses.interfaces.orders