fact: Definition iso_to_z_iso {C : precategory} {b c : C} : iso b c -> z_iso b c := λ f, pr1 f ,, is_z_iso_from_is_iso (pr1 f) (pr2 f).
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories