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).
Require Import UniMath.Foundations.PartA. Require Import UniMath.Foundations.Propositions. Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.CategoryTheory.Core.Categories.