Lemma eq_idtoiso_idtomor {C:precategory} (a b:ob C) (e:a = b) : pr1 (idtoiso e) = idtomor _ _ e. Proof. destruct e; reflexivity. Defined.
Require Import UniMath.Foundations.PartA. Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos.