proposition: Lemma inject_Q_CR_abs : forall q : Q, (CRabs (inject_Q_CR q) == inject_Q_CR (Qabs q))%CR.
proof: Proof. intros q. apply regFunEq_equiv. intros e1 e2. apply ball_refl, (Qpos_nonneg (e1+e2)). Qed.
imports: CoRN.algebra.RSetoid CoRN.metric2.Metric CoRN.metric2.UniformContinuity CoRN.model.totalorder.QposMinMax CoRN.reals.fast.CRArith CoRN.model.metric2.Qmetric Coq.QArith.Qabs CoRN.model.totalorder.QMinMax CoRN.logic.Stability