fact: Definition relabel2 (G: graph2 Lv1 Le1): graph2 Lv2 Le2 := point (relabel G) input output.
imports: HB(structures) Coq(Setoid Morphisms) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom mgraph ptt)