proposition: Lemma inverse_pentagon_6 {V W X Y Z : C} (k : C⟦Y,Z⟧) (h : C⟦X,Y⟧) (g : C⟦W,X⟧) (f : C⟦V,W⟧) : rassociator f (h ∘ g) k o id₂ k ⋆⋆ rassociator f g h = lassociator g h k ⋆⋆ id₂ f o rassociator f g (k ∘ h) o rassociator (g ∘ f) h k.
proof: Proof. rewrite !vassocr. use vcomp_move_L_Mp. { is_iso. } cbn. symmetry. rewrite <- !vassocr. apply inverse_pentagon. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Unitors