fact: Definition uf_equiv (g1 g2: PreGraph Vertex Edge) : Prop := (forall x, vvalid g1 x <-> vvalid g2 x) /\ (forall x r1 r2, uf_root g1 x r1 -> uf_root g2 x r2 -> r1 = r2).
imports: CertiGraph.lib.Coqlib CertiGraph.lib.EquivDec_ext CertiGraph.lib.List_ext CertiGraph.lib.Ensembles_ext CertiGraph.lib.EnumEnsembles CertiGraph.graph.graph_model CertiGraph.graph.path_lemmas CertiGraph.graph.graph_gen CertiGraph.graph.MathGraph CertiGraph.graph.LstGraph CertiGraph.graph.FiniteGraph CertiGraph.graph.reachable_computable