`{Univalence} {A B B' : AbGroup} : const pt == @abses_pullback A B B' grp_homo_const := fun x => (equiv_path_abses_iso (' x)).
Require Import Basics Types. Require Import HSet Limits.Pullback. Require Import WildCat Pointed.Core Homotopy.ExactSequence. Require Import Modalities.ReflectiveSubuniverse. Require Import AbGroups.AbelianGroup AbGroups.AbPullback AbGroups.Biproduct. Require Import AbSES.Core AbSES.DirectSum.