fact: Definition pregraph_join (PV: V -> Prop) (PE: E -> Prop) (G1 G2: Graph) : Prop := Prop_join (vvalid G1) PV (vvalid G2) /\ Prop_join (evalid G1) PE (evalid G2) /\ (forall e : E, evalid G1 e -> evalid G2 e -> src G1 e = src G2 e) /\ (forall e : E, evalid G1 e -> evalid G2 e -> dst G1 e = dst G2 e).
imports: Coq.Logic.ProofIrrelevance Coq.Sets.Ensembles Coq.Sets.Finite_sets Coq.Classes.Morphisms CertiGraph.lib.Coqlib CertiGraph.lib.Ensembles_ext CertiGraph.lib.relation_list CertiGraph.lib.List_ext CertiGraph.lib.Equivalence_ext CertiGraph.lib.EquivDec_ext VST.msl.Coqlib2 Coq.Lists.List CertiGraph.graph.graph_model CertiGraph.graph.path_lemmas CertiGraph.graph.reachable_ind CertiGraph.graph.graph_gen