∀ {ι : Type u_1} {𝕜 : Type u_3} [inst : RCLike 𝕜] [inst_1 : DecidableEq ι] [inst_2 : Fintype ι] {ι' : Type u_7}
  [inst_3 : Fintype ι'] [inst_4 : DecidableEq ι'] (e : ι' ≃ ι) (i' : ι') (v : 𝕜),
  (LinearIsometryEquiv.piLpCongrLeft 2 𝕜 𝕜 e) (EuclideanSpace.single i' v) = EuclideanSpace.single (e i') v