fact: Definition edge_src_fst (g: AdjMatGG) := @esf g ((@sound_gg _ _ _ _ _ _ _ _ g)).
imports: Coq.ZArith.BinInt Coq.Classes.EquivDec compcert.lib.Integers CertiGraph.lib.List_ext CertiGraph.graph.graph_model CertiGraph.graph.FiniteGraph CertiGraph.graph.path_lemmas