proposition: Lemma help_eq : ζ ▹ p = (((k ◃ α) • δp) • (f ◃ α ^-1)) • (β ▹ p).
proof: Proof. rewrite !vassocl. use vcomp_move_L_pM. { is_iso. apply property_from_invertible_2cell. } cbn. rewrite <- vcomp_whisker. rewrite q. rewrite !vassocl. rewrite <- vcomp_whisker. apply idpath. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.DisplayedCats.StreetFibration UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence