fact: Definition isEqualizer_eq {C : category} {e x y : C} {f g f' g' : x --> y} {i i' : e --> x} (p : i · f = i · g) (q : i' · f' = i' · g') (s₁ : f = f') (s₂ : g = g') (s₃ : i = i') (He : isEqualizer f g i p) : isEqualizer f' g' i' q.
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