Lemma TRRGraph_univalence_weq2_idpath (G : TRRGraph) : TRRGraph_univalence_weq2 G G (idpath (pr1 G) ,, idpath (((idpath (pr1 G)) # pr2 G)%transport)) = id_TRRGraphiso G. Proof. apply total2_paths_equiv. exists (idpath (idweq (pr1 G))). apply isaprop_isTRRGhomo. Qed.