proposition: Lemma eremove_vvalid: forall v, vvalid EdgeListGG_eremove v <-> vvalid g v.
proof: Proof. simpl. intros; split; auto. Qed.
imports: VST.floyd.proofauto CertiGraph.lib.Coqlib CertiGraph.lib.EquivDec_ext CertiGraph.lib.List_ext CertiGraph.graph.graph_model CertiGraph.graph.graph_gen CertiGraph.graph.FiniteGraph CertiGraph.graph.undirected_graph