proposition: Lemma oiso2_trans : CRelationClasses.Transitive oiso2.
proof: Proof. move => F G H [isF isG FG] [isG' isH GH]. econstructor. apply: iso2_comp GH. apply: iso2_comp FG _. exact: pack_irrelevance. Defined.
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)