fact: Definition abses_pullback' {A B B' : AbGroup} (f : B' $-> B) : AbSES B A -->* AbSES B' A := Build_BasepointPreservingFunctor (abses_pullback f) (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