proposition: Lemma CRealLe_proper_l : forall x y z : CReal, CRealEq x y -> CRealLe x z -> CRealLe y z.
proof: Proof. intros x y z Hxeqy Hxlez. apply (CRealLe_morph x y Hxeqy z z). - apply CRealEq_refl. - apply Hxlez. Qed.
imports: QArith Qpower Qabs Qround Logic.ConstructiveEpsilon Lia Lqa QExtra ConstructiveExtra