∀ {α : Type u_1} {E : Type u_2} {𝕜 : Type u_3} [inst : RCLike 𝕜] [inst_1 : MeasurableSpace α]
  {μ : MeasureTheory.Measure α} [inst_2 : NormedAddCommGroup E] [inst_3 : InnerProductSpace 𝕜 E]
  (f : ↥(MeasureTheory.Lp E 2 μ)), ‖f‖ ^ 2 = RCLike.re (inner 𝕜 f f)