Lemma is_functor_rwhisker (g : C⟦b, c⟧) : is_functor (rwhisker_functor_data g). Proof. split; red; cbn. - intro f. apply id2_rwhisker. - intros f1 f2 f3 x y. apply pathsinv0, rwhisker_vcomp. Qed.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.PrecategoryBinProduct.