`{Univalence} {B A : AbGroup} (E : AbSES B A) : abses_pushout (inclusion E) E = pt := abses_pushout_component3_id (abses_pushout_inclusion_morphism E) (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.