proposition: Lemma length_terms_of_aterms : forall n (ts : aterms n), length (terms_of_aterms ts) = n.
proof: Proof. induction ts; simpl; intros. refl. rewrite IHts. refl. Qed.
imports: CoLoR(LogicUtil ATerm VecUtil) CoLoR(term_spec EqUtil) CoLoR(NatUtil) Coq(List Relations) CoLoR(term SN ASubstitution)