proposition: Lemma oiso2_add_edgeE' F G i e1 e2 x y x' y' u v E1 E2 Vx Vy Vx' Vy' Ix Iy uv k : k \in vset F -> @oiso2_add_edge' F G i e1 e2 x y x' y' u v E1 E2 Vx Vy Vx' Vy' Ix Iy uv k = i k.
proof: Proof. move => Vk. destruct i => /=. 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)