∀ {𝕜 : Type u_3} [inst : NontriviallyNormedField 𝕜] {E : Type u_2} [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] [inst_3 : CompleteSpace 𝕜] (ι : Type u_1) [inst_4 : Fintype ι] [inst_5 : DecidableEq ι],
  Continuous (LinearMap.toContinuousLinearMap.symm ≪≫ₗ LinearEquiv.piRing 𝕜 E ι 𝕜).invFun