fact: Definition vfun_body (G H : pre_graph) (graph_G : is_graph G) (graph_H : is_graph H) (h : bij (pack G) (pack H)) (x : VT) : VT := locked (match @idP (x \in vset G) with | ReflectT p => val (h (Sub x p)) | ReflectF _ => x 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)