proposition: Lemma eqvG_iso2E (G H : pre_graph) (isG : is_graph G) (isH : is_graph H) (E : G ≡G H) x : x \in vset G -> @eqvG_iso2 G H isG isH E x = x.
proof: Proof. move => Vx. rewrite /= vfun_bodyE /=. destruct E. rewrite /=. by rewrite bij_castE. 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)