fact: Record eqvG (G H : pre_graph) : Prop := WeqG { sameV : vset G = vset H; sameE : eset G = eset H; same_endpt b : {in eset G, endpt G b =1 endpt H b }; eqv_lv x : x \in vset G -> lv G x ≡ lv H x; eqv_le e : e \in eset G -> le G e ≡ le H e; same_in : p_in G = p_in H; same_out : p_out G = p_out H }.
imports: HB(structures) Coq(Relation_Definitions Morphisms RelationClasses) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom rewriting) GraphTheory(finmap_plus)