fact: Definition abses_swap_morphism `{Funext} {A A' B B' : AbGroup} (E : AbSES B A) (F : AbSES B' A') : AbSESMorphism (abses_direct_sum E F) (abses_direct_sum F E).
imports: Basics Types Truncations.Core Pointed.Core WildCat.Core Homotopy.ExactSequence AbGroups.AbelianGroup AbSES.Core AbGroups.Biproduct