fact: Fixpoint shiftLeft (v: V) (l: list (E * V)) : list (V * E) := match l with | nil => nil | (e, v') :: l' => (v, e) :: (shiftLeft v' l') end.
imports: Coq.Classes.Morphisms Coq.micromega.Lia Coq.Logic.FunctionalExtensionality CertiGraph.lib.Coqlib CertiGraph.lib.EquivDec_ext CertiGraph.lib.EnumEnsembles CertiGraph.lib.List_ext CertiGraph.graph.graph_model CertiGraph.graph.path_lemmas CertiGraph.graph.graph_gen CertiGraph.graph.FiniteGraph