Definition CoproductOfArrows'_comp (I : UU) (C : category) (CC : Coproducts I C) (a b c : I -> C) (f : ∏ i, a i --> b i) (g : ∏ i, b i --> c i) : CoproductOfArrows' _ _ _ _ f · CoproductOfArrows' _ _ (CC _) (CC _) g = CoproductOfArrows' _ _ (CC _) (CC _)(λ i, f i · g i).
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. 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.Core.Univalence. Require Import UniMath.CategoryTheory.FunctorCategory. Require Import UniMath.CategoryTheory.ProductCategory. Require Import UniMath.CategoryTheory.Limits.Graphs.Colimits. Require Import UniMath.CategoryTheory.whiskering.