proposition: Corollary graph_to_wedgelist_edgeless_GG: graph_to_wedgelist edgeless_GG = nil.
proof: Proof. unfold graph_to_wedgelist; intros. rewrite edgeless_GG_EList. 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