∀ {α : Type u_1} {β : Type u_2} {γ : Type u_3} [inst : AddCommGroup α] [inst_1 : UniformSpace α] [IsUniformAddGroup α]
  {f : β → α} [CompleteSpace α] {i : γ → β}, Summable f → Function.Injective i → Summable (f ∘ i)