Theorem: MeasureTheory.innerRegularWRT_isCompact_isClosed_measure_ne_top_of_group
File: Mathlib/MeasureTheory/Group/Measure.lean

Proof steps:
state_before: 𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
⊢ μ.InnerRegularWRT (fun s => IsCompact s ∧ IsClosed s) fun s => MeasurableSet s ∧ μ s ≠ ⊤
state_after: 𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
⊢ ∃ K ⊆ s, (fun s => IsCompact s ∧ IsClosed s) K ∧ r < μ K
tactic: intro s ⟨s_meas, μs⟩ r hr
state_before: 𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
⊢ ∃ K ⊆ s, (fun s => IsCompact s ∧ IsClosed s) K ∧ r < μ K
state_after: case intro.intro.intro
𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
K : Set G
Ks : K ⊆ s
K_comp : IsCompact K
hK : r < μ K
⊢ ∃ K ⊆ s, (fun s => IsCompact s ∧ IsClosed s) K ∧ r < μ K
tactic: rcases h.innerRegular ⟨s_meas, μs⟩ r hr with ⟨K, Ks, K_comp, hK⟩
state_before: case intro.intro.intro
𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
K : Set G
Ks : K ⊆ s
K_comp : IsCompact K
hK : r < μ K
⊢ ∃ K ⊆ s, (fun s => IsCompact s ∧ IsClosed s) K ∧ r < μ K
state_after: case intro.intro.intro.refine_1
𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
K : Set G
Ks : K ⊆ s
K_comp : IsCompact K
hK : r < μ K
⊢ closure K ⊆ s

case intro.intro.intro.refine_2
𝕜 : Type u_1
G : Type u_2
H : Type u_3
inst✝⁶ : MeasurableSpace G
inst✝⁵ : MeasurableSpace H
inst✝⁴ : TopologicalSpace G
inst✝³ : BorelSpace G
μ : Measure G
inst✝² : Group G
inst✝¹ : TopologicalGroup G
inst✝ : μ.IsMulLeftInvariant
h : μ.InnerRegularCompactLTTop
s : Set G
s_meas : MeasurableSet s
μs : μ s ≠ ⊤
r : ℝ≥0∞
hr : r < μ s
K : Set G
Ks : K ⊆ s
K_comp : IsCompact K
hK : r < μ K
⊢ r < μ (closure K)
tactic: refine ⟨closure K, ?_, ⟨K_comp.closure, isClosed_closure⟩, ?_⟩