fact: Definition reachable_by_path (g: Gph) (p: path) (n : V) (P : Ensemble V) : Ensemble V := fun n' => path_ends g p n n' /\ good_path g P p.
imports: Coq.Logic.ProofIrrelevance Coq.micromega.Lia CertiGraph.lib.Coqlib CertiGraph.lib.EnumEnsembles CertiGraph.lib.List_ext CertiGraph.lib.EquivDec_ext CertiGraph.graph.graph_model Coq.Lists.List Coq.Lists.ListDec