proposition: Lemma equiv_Cokernel1_eq {a b : C} (f : C⟦a, b⟧) (CK : Limits.Cokernels.Cokernel (equiv_Zero2 Z) f) : f · (CokernelArrow CK) = ZeroArrow Z a b · (CokernelArrow CK).
proof: Proof. rewrite CokernelCompZero. rewrite postcomp_with_ZeroArrow. apply equiv_ZeroArrow. Qed.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Limits.Graphs.Limits UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Graphs.Zero UniMath.CategoryTheory.Limits.Graphs.Coequalizers UniMath.CategoryTheory.Limits.Cokernels