fact: Definition iscomplex_abses_pullback `{Univalence} {A B0 B1 B2 : AbGroup} (f : B0 $-> B1) (g : B1 $-> B2) (h : g $o f == grp_homo_const) : IsComplex (abses_pullback_pmap (A:=A) g) (abses_pullback_pmap f).
imports: Basics Types HSet Limits.Pullback WildCat Pointed.Core Homotopy.ExactSequence Modalities.ReflectiveSubuniverse AbGroups.AbelianGroup AbGroups.AbPullback AbGroups.Biproduct AbSES.Core AbSES.DirectSum