fact: Definition equiv_path_abses_1 `{Univalence} {B A : AbGroup@{u}} {E : AbSES B A} : equiv_path_abses_iso (abses_path_data_1 E) = idpath.
imports: Basics Types Truncations.Core HSet WildCat Groups.QuotientGroup Groups.ShortExactSequence AbelianGroup AbGroups.Biproduct AbHom Homotopy.ExactSequence Pointed Modalities.ReflectiveSubuniverse