Lemma id2_rwhisker_CAT {C D E : category} (F : [C, D]) (G : [D, E]) : rwhisker_CAT G (id2_CAT F) = id2_CAT _. Proof. apply post_whisker_identity. Qed.
Require Import UniMath.Foundations.PartD. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.FunctorCategory. Require Import UniMath.CategoryTheory.whiskering.