∀ {α : Type u_2} {β : Type u_3} [inst : AddCommMonoid α] [inst_1 : AddCommMonoid β] {A₁ A₂ : Set α} {B₁ B₂ : Set β}
  {f : α → β} {n : ℕ}, A₁ ⊆ A₂ → IsAddFreimanHom n A₂ B₂ f → Set.MapsTo f A₁ B₁ → IsAddFreimanHom n A₁ B₁ f