`{Univalence} {A B : AbGroup} : abses_pushout (B:=B) (@grp_homo_id A) == idmap := fun E => abses_pushout_component3_id (abses_morphism_id 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.