Theorem: MeasureTheory.tendstoInMeasure_of_tendsto_ae_of_stronglyMeasurable
File: Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean

tactic: refine fun ε hε => ENNReal.tendsto_atTop_zero.mpr fun δ hδ => ?_
state_before: α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
⊢ TendstoInMeasure μ f atTop g
state_after: α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ

tactic: by_cases hδi : δ = ∞
state_before: α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ
state_after: case pos
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
hδi : δ = ⊤
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ

case neg
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
hδi : ¬δ = ⊤
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ

tactic: lift δ to ℝ≥0 using hδi
state_before: case neg
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
hδi : ¬δ = ⊤
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ
state_after: case neg.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : ↑δ > 0
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: rw [gt_iff_lt, ENNReal.coe_pos, ← NNReal.coe_pos] at hδ
state_before: case neg.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : ↑δ > 0
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: obtain ⟨t, _, ht, hunif⟩ := tendstoUniformlyOn_of_ae_tendsto' hf hg hfg hδ
state_before: case neg.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ENNReal.ofReal ↑δ
hunif : TendstoUniformlyOn f g atTop tᶜ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: rw [ENNReal.ofReal_coe_nnreal] at ht
state_before: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ENNReal.ofReal ↑δ
hunif : TendstoUniformlyOn f g atTop tᶜ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : TendstoUniformlyOn f g atTop tᶜ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: rw [Metric.tendstoUniformlyOn_iff] at hunif
state_before: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : TendstoUniformlyOn f g atTop tᶜ
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: obtain ⟨N, hN⟩ := eventually_atTop.1 (hunif ε hε)
state_before: case neg.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: refine ⟨N, fun n hn => ?_⟩
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ

tactic: suffices { x : α | ε ≤ dist (f n x) (g x) } ⊆ t from (measure_mono this).trans ht
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ μ {x | ε ≤ dist (f n x) (g x)} ≤ ↑δ
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ {x | ε ≤ dist (f n x) (g x)} ⊆ t

tactic: rw [← Set.compl_subset_compl]
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ {x | ε ≤ dist (f n x) (g x)} ⊆ t
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ tᶜ ⊆ {x | ε ≤ dist (f n x) (g x)}ᶜ

tactic: intro x hx
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
⊢ tᶜ ⊆ {x | ε ≤ dist (f n x) (g x)}ᶜ
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
x : α
hx : x ∈ tᶜ
⊢ x ∈ {x | ε ≤ dist (f n x) (g x)}ᶜ

tactic: rw [Set.mem_compl_iff, Set.nmem_setOf_iff, dist_comm, not_le]
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
x : α
hx : x ∈ tᶜ
⊢ x ∈ {x | ε ≤ dist (f n x) (g x)}ᶜ
state_after: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
x : α
hx : x ∈ tᶜ
⊢ dist (g x) (f n x) < ε

tactic: exact hN n hn x hx
state_before: case neg.intro.intro.intro.intro.intro
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0
hδ : 0 < ↑δ
t : Set α
left✝ : MeasurableSet t
ht : μ t ≤ ↑δ
hunif : ∀ ε > 0, ∀ᶠ (n : ℕ) in atTop, ∀ x ∈ tᶜ, dist (g x) (f n x) < ε
N : ℕ
hN : ∀ b ≥ N, ∀ x ∈ tᶜ, dist (g x) (f b x) < ε
n : ℕ
hn : n ≥ N
x : α
hx : x ∈ tᶜ
⊢ dist (g x) (f n x) < ε
state_after: no goals

tactic: simp only [hδi, imp_true_iff, le_top, exists_const]
state_before: case pos
α : Type u_1
ι : Type u_2
E : Type u_3
m : MeasurableSpace α
μ : Measure α
inst✝¹ : MetricSpace E
f : ℕ → α → E
g : α → E
inst✝ : IsFiniteMeasure μ
hf : ∀ (n : ℕ), StronglyMeasurable (f n)
hg : StronglyMeasurable g
hfg : ∀ᵐ (x : α) ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))
ε : ℝ
hε : 0 < ε
δ : ℝ≥0∞
hδ : δ > 0
hδi : δ = ⊤
⊢ ∃ N, ∀ n ≥ N, μ {x | ε ≤ dist (f n x) (g x)} ≤ δ
state_after: no goals