{A A' B B' : AbGroup} (f : A $-> A') (g : B $-> B') `{IsEquiv _ _ f} `{IsEquiv _ _ g} : GroupIsomorphism (ab_biprod A B) (ab_biprod A' B') := Build_GroupIsomorphism _ _ _ (isequiv_functor_ab_biprod f g).
Require Import Basics Types Truncations.Core. Require Import WildCat. Require Import HSet. Require Import AbelianGroup. Require Import Modalities.ReflectiveSubuniverse.