proposition: Lemma Vid_eq : forall (n:nat) (v:Vector.t A n), v = Vid v.
proof: Proof. destruct v; auto. Qed.
imports: CoRN.algebra.CPolynomials CoRN.algebra.CSums CoRN.tactics.Rational CoRN.model.ordfields.Qordfield CoRN.algebra.COrdFields2 CoRN.algebra.CRing_Homomorphisms Coq(Lia)