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