fact: Definition abses_pushout_const_morphism {B A A' : AbGroup} (E : AbSES B A) : AbSESMorphism E (pt : AbSES B A') := abses_pushout_trivial_morphism E grp_homo_const grp_homo_const (fun _ => idpath).
imports: Basics Types Truncations.Core WildCat Pointed.Core Homotopy.ExactSequence HIT.epi Modalities.ReflectiveSubuniverse AbelianGroup AbPushout AbHom AbGroups.Biproduct AbSES.Core AbSES.DirectSum