fact: Definition EqualizerArrow {y z : C} {f g : y --> z} (E : Equalizer f g) : C⟦E, y⟧ := pr2 (pr1 E).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Monics UniMath.CategoryTheory.Retracts