proposition: Theorem plusTerm_comp_l : forall a b c : Term, eqT a c -> eqT b c -> eqTerm a b -> eqTerm (plusTerm a c) (plusTerm b c).
proof: Proof. Proof using multA minusA invA divA cs A1 A0. intros a b c; case a; case b; case c; simpl in |- *; auto. intuition. Qed.
imports: Coq(Relation_Definitions) Buchberger(CoefStructure moreCoefStructure) Buchberger(OrderStructure Monomials)