proposition: Lemma oiso2_remove_edgesE (F G : pre_graph) (i : F ⩭2 G) E E' S EE' z : z \in vset F -> @oiso2_remove_edges F G i E E' S EE' z = i z.
proof: Proof. case: i EE' => isF isG j EE' Vx. by rewrite /= !vfun_bodyE. Qed.
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)