fact: Definition Cokernel {x y : C} (f : x --> y) : UU := ∑ D : (∑ z : ob C, y --> z), ∑ (e : f · (pr2 D) = ZeroArrow Z x (pr1 D)), isCokernel f (pr2 D) e.
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