fact: Definition ucycle g p l := match p with | nil => False | u::nil => False | u::v::p' => connected_by_path g p u u /\ fits_upath g l p /\ NoDup l end.
imports: Coq.Logic.Classical CertiGraph.lib.List_ext CertiGraph.lib.EquivDec_ext CertiGraph.graph.graph_model CertiGraph.graph.graph_relation CertiGraph.graph.path_lemmas CertiGraph.graph.graph_gen CertiGraph.graph.FiniteGraph