Definition nat_trans_comp_assoc (F1 F2 F3 F4 : functor A B) (α: nat_trans F1 F2) (β: nat_trans F2 F3) (γ: nat_trans F3 F4): nat_trans_comp _ _ _ α (nat_trans_comp _ _ _ β γ) = nat_trans_comp _ _ _ (nat_trans_comp _ _ _ α β) γ.
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.TransportMorphisms. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.Univalence.