Theorem: MeasureTheory.lintegral_iSup'
File: Mathlib/MeasureTheory/Integral/Lebesgue.lean

Proof steps:
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
⊢ ∫⁻ (a : α), ⨆ n, f n a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: simp_rw [← iSup_apply]
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: let p : α → (ℕ → ℝ≥0∞) → Prop := fun _ f' => Monotone f'
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: have hp : ∀ᵐ x ∂μ, p x fun i => f i x := h_mono
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ∫⁻ (a : α), (⨆ i, f i) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ∫⁻ (a : α), (⨆ n, aeSeq hf p n) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: rw [lintegral_congr_ae (aeSeq.iSup hf hp).symm]
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ∫⁻ (a : α), (⨆ n, aeSeq hf p n) a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ∫⁻ (a : α), ⨆ i, aeSeq hf p i a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: simp_rw [iSup_apply]
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ∫⁻ (a : α), ⨆ i, aeSeq hf p i a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ⨆ n, ∫⁻ (a : α), aeSeq hf p n a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
tactic: rw [lintegral_iSup (aeSeq.measurable hf p) h_ae_seq_mono]
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
⊢ ⨆ n, ∫⁻ (a : α), aeSeq hf p n a ∂μ = ⨆ n, ∫⁻ (a : α), f n a ∂μ
state_after: case e_s.h
α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
n : ℕ
⊢ ∫⁻ (a : α), aeSeq hf p n a ∂μ = ∫⁻ (a : α), f n a ∂μ
tactic: congr with n
state_before: case e_s.h
α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
m : MeasurableSpace α
μ ν : Measure α
f : ℕ → α → ℝ≥0∞
hf : ∀ (n : ℕ), AEMeasurable (f n) μ
h_mono : ∀ᵐ (x : α) ∂μ, Monotone fun n => f n x
p : α → (ℕ → ℝ≥0∞) → Prop := fun x f' => Monotone f'
hp : ∀ᵐ (x : α) ∂μ, p x fun i => f i x
h_ae_seq_mono : Monotone (aeSeq hf p)
n : ℕ
⊢ ∫⁻ (a : α), aeSeq hf p n a ∂μ = ∫⁻ (a : α), f n a ∂μ
state_after: no goals
tactic: exact lintegral_congr_ae (aeSeq.aeSeq_n_eq_fun_n_ae hf hp n)