∀ {ι : Type u_1} {α : ι → Type u_3} [inst : Fintype ι] {m : (i : ι) → MeasureTheory.OuterMeasure (α i)}
  {n : MeasureTheory.OuterMeasure ((i : ι) → α i)},
  n ≤ MeasureTheory.OuterMeasure.pi m ↔
    ∀ (s : (i : ι) → Set (α i)), (Set.univ.pi s).Nonempty → n (Set.univ.pi s) ≤ ∏ i, (m i) (s i)