Definition inv_from_z_iso {C : precategory_data} {a b : C} (i : z_iso a b) : b --> a := is_z_isomorphism_mor (pr2 i).
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.