fact: Definition make_isEqualizer {x y z : C} (f g : y --> z) (e : x --> y) (H : e · f = e · g) : (∏ (w : C) (h : w --> y) (H' : h · f = h · g), ∃! ψ : w --> x, ψ · e = h) -> isEqualizer f g e H.
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