fact: Hypothesis Hz : z \in cp G input output :\: IO.
imports: Coq(RelationClasses Morphisms Setoid Lia) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries) GraphTheory(digraph sgraph minor checkpoint cp_minor) GraphTheory(setoid_bigop structures pttdom ptt) GraphTheory(mgraph mgraph2 skeleton bounded)