fact: Definition abses_pullback_pmap_id `{Univalence} {A B : AbGroup} : abses_pullback_pmap (A:=A) (@grp_homo_id B) ==* pmap_idmap.
imports: Basics Types HSet Limits.Pullback WildCat Pointed.Core Homotopy.ExactSequence Modalities.ReflectiveSubuniverse AbGroups.AbelianGroup AbGroups.AbPullback AbGroups.Biproduct AbSES.Core AbSES.DirectSum