Definition identity_iso {C : precategory} (a : ob C) : iso a a := tpair _ _ (identity_is_iso C a).
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.