fact: Definition redirect (G : graph2) (H : {set G}) : graph2 := if [pick z in H | adjacent input z] isn't Some z then 1 else redirect_to H z.
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)