Definition z_iso_to_iso {C : precategory} {b c : C} (f : z_iso b c) : iso b c := pr1 f ,, is_iso_from_is_z_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.