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Atlas.TheoryOfProbability.code.BoundedConvergence

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 G] {F : αG} {f : αG} {C : } (hF_meas : ∀ (n : ), AEStronglyMeasurable (F n) μ) (h_bound : ∀ (n : ), ∀ᵐ (a : α) μ, F n a C) (h_lim : TendstoInMeasure μ F Filter.atTop f) :
Filter.Tendsto (fun (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.