fact: Definition KernelEqualizer {x y : ob C} {f : x --> y} (K : Kernel Z f) : Equalizer f (ZeroArrow Z _ _).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Monics UniMath.CategoryTheory.Limits.Equalizers UniMath.CategoryTheory.Limits.Zero