{B A : AbGroup} (E : AbSES B A) : AbSESMorphism E (pt : AbSES B E) := abses_pushout_trivial_morphism E (inclusion E) grp_homo_id (fun _ => idpath).
Require Import Basics Types Truncations.Core. Require Import WildCat Pointed.Core Homotopy.ExactSequence HIT.epi. Require Import Modalities.ReflectiveSubuniverse. Require Import AbelianGroup AbPushout AbHom AbGroups.Biproduct. Require Import AbSES.Core AbSES.DirectSum.