proposition: Lemma CoproductIn2Commutes (a b : C) (CC : CoproductCocone a b): ∏ (c : C) (f : a --> c) g, CoproductIn2 CC · CoproductArrow CC f g = g.
proof: Proof. intros c f g. exact (binarySum_in_2_eqn CC f g). Qed.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.FunctorCategory UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.RepresentableFunctors.Representation