fact: Definition abses_pushout_inclusion `{Univalence} {B A : AbGroup} (E : AbSES B A) : abses_pushout (inclusion E) E = pt := abses_pushout_component3_id (abses_pushout_inclusion_morphism E) (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