proposition: Lemma cpoly_double_sym_ind0_cs : forall P : cpoly_csetoid -> cpoly_csetoid -> Prop, Tsymmetric P -> (forall p, P p cpoly_zero_cs) -> (forall p q c d, P p q -> P (cpoly_linear_cs c p) (cpoly_linear_cs d q)) -> forall p q, P p q.
proof: Proof. intros. apply cpoly_double_ind0; auto. Qed.
imports: CoRN.algebra.CRing_Homomorphisms CoRN.tactics.Rational