{B A : AbGroup@{u}} (E : AbSES B A) : E $-> E := (grp_iso_id; (fun _ => idpath, fun _ => idpath)).
Require Import Basics Types Truncations.Core. Require Import HSet WildCat. Require Import Groups.QuotientGroup Groups.ShortExactSequence. Require Import AbelianGroup AbGroups.Biproduct AbHom. Require Import Homotopy.ExactSequence Pointed. Require Import Modalities.ReflectiveSubuniverse.