Lemma iso_comp_right_isweq {C : precategory_data} {a b : ob C} (h : iso a b) (c : C) : isweq (fun f : b --> c => h · f). Proof. apply (pr2 h _ ). 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.