Definition iso_comp {C : precategory} {a b c : ob C} (f : iso a b) (g : iso b c) : iso a c. Proof. exists (f · g). apply is_iso_comp_of_isos. 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.