theorem
MeasureTheory.tendsto_integral_of_bounded_convergence
{α : Type u_1}
{m : MeasurableSpace α}
{μ : Measure α}
[IsProbabilityMeasure μ]
{G : Type u_2}
[NormedAddCommGroup G]
[NormedSpace ℝ G]
{F : ℕ → α → G}
{f : α → G}
{C : ℝ}
(hF_meas : ∀ (n : ℕ), AEStronglyMeasurable (F n) μ)
(h_bound : ∀ (n : ℕ), ∀ᵐ (a : α) ∂μ, ‖F n a‖ ≤ C)
(h_lim : TendstoInMeasure μ F Filter.atTop f)
:
Filter.Tendsto (fun (n : ℕ) => ∫ (a : α), F n a ∂μ) Filter.atTop (nhds (∫ (a : α), f a ∂μ))
Bounded convergence theorem. Let μ be a probability measure and let Fₙ
be a sequence of (a.e. strongly) measurable functions into a normed space with
‖Fₙ‖ ≤ C almost surely. If Fₙ → f in measure (i.e. in probability), then
∫ Fₙ dμ → ∫ f dμ.