fact: Definition abses_pullback_point `{Univalence} {A B B' : AbGroup} (f : B' $-> B) : abses_pullback f pt = pt :> AbSES B' A := equiv_path_abses_iso (abses_pullback_point' f).
imports: Basics Types HSet Limits.Pullback WildCat Pointed.Core Homotopy.ExactSequence Modalities.ReflectiveSubuniverse AbGroups.AbelianGroup AbGroups.AbPullback AbGroups.Biproduct AbSES.Core AbSES.DirectSum