𝕜 : Type u_2
E : Type u_1
ι : Type ?u.126319
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousSMul 𝕜 E
U : Set E
inst✝ : RegularSpace E
s : Set E
hs : s ∈ 𝓝 0 ∧ IsClosed s
⊢ ∃ i', (i' ∈ 𝓝 0 ∧ IsClosed i' ∧ Balanced 𝕜 i') ∧ id i' ⊆ id s
𝕜 : Type u_2
E : Type u_1
ι : Type ?u.126319
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousSMul 𝕜 E
U : Set E
inst✝ : RegularSpace E
⊢ HasBasis (𝓝 0) (fun s => s ∈ 𝓝 0 ∧ IsClosed s ∧ Balanced 𝕜 s) id
refine'
  (closed_nhds_basis 0).to_hasBasis (fun s hs => _) fun s hs => ⟨s, ⟨hs.1, hs.2.1⟩, rfl.subset⟩
𝕜 : Type u_2
E : Type u_1
ι : Type ?u.126319
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousSMul 𝕜 E
U : Set E
inst✝ : RegularSpace E
s : Set E
hs : s ∈ 𝓝 0 ∧ IsClosed s
⊢ IsClosed (balancedCore 𝕜 s) ∧ Balanced 𝕜 (balancedCore 𝕜 s)
𝕜 : Type u_2
E : Type u_1
ι : Type ?u.126319
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousSMul 𝕜 E
U : Set E
inst✝ : RegularSpace E
s : Set E
hs : s ∈ 𝓝 0 ∧ IsClosed s
⊢ ∃ i', (i' ∈ 𝓝 0 ∧ IsClosed i' ∧ Balanced 𝕜 i') ∧ id i' ⊆ id s
refine' ⟨balancedCore 𝕜 s, ⟨balancedCore_mem_nhds_zero hs.1, _⟩, balancedCore_subset s⟩
no goals
𝕜 : Type u_2
E : Type u_1
ι : Type ?u.126319
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousSMul 𝕜 E
U : Set E
inst✝ : RegularSpace E
s : Set E
hs : s ∈ 𝓝 0 ∧ IsClosed s
⊢ IsClosed (balancedCore 𝕜 s) ∧ Balanced 𝕜 (balancedCore 𝕜 s)
exact ⟨hs.2.balancedCore, balancedCore_balanced s⟩