{A : Type u_2} →
  {B : Type u_3} →
    {C : Type u_4} →
      [inst : AddMonoid A] →
        [inst_1 : AddMonoid B] →
          [inst_2 : AddMonoid C] →
            [inst_3 : TopologicalSpace A] →
              [inst_4 : TopologicalSpace B] → [inst_5 : TopologicalSpace C] → (A →ₜ+ B) → (A →ₜ+ C) → A →ₜ+ B × C