fact: Definition equiv_path_abgroup_group `{Univalence} {A B : AbGroup} : (A = B :> AbGroup) <~> (A = B :> Group) := equiv_path_group oE equiv_path_abgroup^-1.
imports: Basics Types Classes.interfaces.canonical_names (Zero, zero) Classes.interfaces.abstract_algebra (IsAbGroup(..), abgroup_group, abgroup_commutative) Algebra.Groups.Group Algebra.Groups.Subgroup Algebra.Groups.QuotientGroup WildCat