∀ {ι : Type uι} [inst : Fintype ι] {𝕜 : Type u𝕜} [inst_1 : NontriviallyNormedField 𝕜] {E : ι → Type uE}
  [inst_2 : (i : ι) → SeminormedAddCommGroup (E i)] [inst_3 : (i : ι) → NormedSpace 𝕜 (E i)],
  (PiTensorProduct.mapL fun i => ContinuousLinearMap.id 𝕜 (E i)) =
    ContinuousLinearMap.id 𝕜 (PiTensorProduct 𝕜 fun i => E i)