fact: Definition pack_v (x : VT) : pack := match @idP (x \in vset G) with | ReflectT p => Sub x p | ReflectF _ => input end.
imports: Coq(Relation_Definitions Morphisms RelationClasses) mathcomp(all_ssreflect) GraphTheory(edone finite_quotient preliminaries bij equiv) GraphTheory(setoid_bigop structures pttdom mgraph mgraph2) GraphTheory(rewriting open_confluence finmap_plus)