∀ {ι : Type u_2} [inst : Fintype ι] {𝕜 : Type u_3} [inst_1 : NontriviallyNormedField 𝕜] {E : ι → Type u_1}
  [inst_2 : (i : ι) → SeminormedAddCommGroup (E i)] [inst_3 : (i : ι) → NormedSpace 𝕜 (E i)],
  ContinuousAdd (PiTensorProduct 𝕜 fun i => E i)