proposition: Lemma CokernelCoequalizer_eq {x y : ob C} {f : x --> y} (CK : Cokernel Z f) : f · CokernelArrow CK = ZeroArrow Z x y · CokernelArrow CK.
proof: Proof. rewrite ZeroArrow_comp_left. use CokernelCompZero. Qed.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Epis UniMath.CategoryTheory.Limits.Coequalizers UniMath.CategoryTheory.Limits.Zero