∀ {R : Type u_5} {ι : Type u_3} {M₁ : ι → Type u_4} [inst : Semiring R] [inst_1 : (i : ι) → AddCommMonoid (M₁ i)]
  [inst_2 : (i : ι) → Module R (M₁ i)] [inst_3 : (i : ι) → TopologicalSpace (M₁ i)] {ι' : Type u_1} {M' : ι' → Type u_2}
  [inst_4 : (i : ι') → AddCommMonoid (M' i)] [inst_5 : (i : ι') → TopologicalSpace (M' i)]
  [inst_6 : (i : ι') → Module R (M' i)],
  Function.LeftInverse (fun f i => (ContinuousLinearMap.proj i).compContinuousMultilinearMap f)
    ContinuousMultilinearMap.pi