Definition z_iso_identity {C : precategory} (c : C) : z_iso c c. Proof. use make_z_iso. - exact (identity c). - exact (identity c). - exact (is_inverse_in_precat_identity c). Defined.
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.