{M : Type u_1} →
  {N : Type u_2} →
    [inst : TopologicalSpace M] →
      [inst_1 : TopologicalSpace N] →
        [inst_2 : Add M] → [inst_3 : Add N] → (f : M ≃ₜ N) → (∀ (x y : M), f (x + y) = f x + f y) → M ≃ₜ+ N