mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹² : NormedAddCommGroup E
inst✝¹¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹⁰ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
F : Type u_5
inst✝⁷ : NormedAddCommGroup F
inst✝⁶ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝⁵ : TopologicalSpace (TotalSpace F V)
inst✝⁴ : (x : M) → TopologicalSpace (V x)
inst✝³ : FiberBundle F V
inst✝² : (x : M) → AddCommGroup (V x)
inst✝¹ : (x : M) → Module 𝕜 (V x)
inst✝ : VectorBundle 𝕜 F V
u : Set M
x₀ : M
ι : Type u_7
t : ι → (x : M) → V x
ht : LocallyFinite fun i ↦ {x | t i x ≠ 0}
ht' : ∀ (i : ι), ContMDiffWithinAt I (I.prod 𝓘(𝕜, F)) n (fun x ↦ ⟨x, t i x⟩) u x₀
y : M
hy : y ∈ Set.univ
U : Set M
hu : U ∈ nhds y
hfin : {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ U).Nonempty}.Finite
⊢ {x | t x y ≠ 0} ⊆ {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ U).Nonempty}

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹² : NormedAddCommGroup E
inst✝¹¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹⁰ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
F : Type u_5
inst✝⁷ : NormedAddCommGroup F
inst✝⁶ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝⁵ : TopologicalSpace (TotalSpace F V)
inst✝⁴ : (x : M) → TopologicalSpace (V x)
inst✝³ : FiberBundle F V
inst✝² : (x : M) → AddCommGroup (V x)
inst✝¹ : (x : M) → Module 𝕜 (V x)
inst✝ : VectorBundle 𝕜 F V
u : Set M
x₀ : M
ι : Type u_7
t : ι → (x : M) → V x
ht : LocallyFinite fun i ↦ {x | t i x ≠ 0}
ht' : ∀ (i : ι), ContMDiffWithinAt I (I.prod 𝓘(𝕜, F)) n (fun x ↦ ⟨x, t i x⟩) u x₀
⊢ ContMDiffWithinAt I (I.prod 𝓘(𝕜, F)) n (fun x ↦ ⟨x, ∑ᶠ (i : ι), t i x⟩) u x₀

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝² : TopologicalSpace X
s : Set X
inst✝¹ : LocallyCompactSpace X
inst✝ : T2Space X
p : (X → ℝ) → Prop
h01 :
  ∀ (s t : Set X),
    IsClosed[inst✝²] s →
      IsCompact t → Disjoint s t → ∃ f, p ⇑f ∧ EqOn (⇑f) 0 s ∧ EqOn (⇑f) 1 t ∧ ∀ (x : X), f x ∈ Icc 0 1
hs : IsCompact s
U : ι → Set X
ho : ∀ (i : ι), IsOpen[inst✝²] (U i)
hf : LocallyFinite U
hU : s ⊆ ⋃ i, U i
⊢ ∃ f, (∀ (i : ι), p ⇑(f i)) ∧ f.IsSubordinate U ∧ ∀ (i : ι), HasCompactSupport ⇑(f i)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹² : NormedAddCommGroup E
inst✝¹¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹⁰ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
F : Type u_5
inst✝⁷ : NormedAddCommGroup F
inst✝⁶ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝⁵ : TopologicalSpace (TotalSpace F V)
inst✝⁴ : (x : M) → TopologicalSpace (V x)
inst✝³ : FiberBundle F V
inst✝² : (x : M) → AddCommGroup (V x)
inst✝¹ : (x : M) → Module 𝕜 (V x)
inst✝ : VectorBundle 𝕜 F V
x₀ : M
ι : Type u_7
t : ι → (x : M) → V x
ht : LocallyFinite fun i ↦ {x | t i x ≠ 0}
ht' : ∀ (i : ι), ContMDiffAt I (I.prod 𝓘(𝕜, F)) n (fun x ↦ ⟨x, t i x⟩) x₀
⊢ ContMDiffAt I (I.prod 𝓘(𝕜, F)) n (fun x ↦ ⟨x, ∑ᶠ (i : ι), t i x⟩) x₀

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹⁰ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁹ : NormedAddCommGroup E
inst✝⁸ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁷ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁶ : TopologicalSpace M
inst✝⁵ : ChartedSpace H M
F : Type u_5
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝² : TopologicalSpace (TotalSpace F V)
inst✝¹ : (x : M) → TopologicalSpace (V x)
inst✝ : FiberBundle F V
⊢ Injective ContMDiffSection.toFun

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝² : TopologicalSpace X
s : Set X
inst✝¹ : LocallyCompactSpace X
inst✝ : T2Space X
hs : IsCompact s
U : ι → Set X
ho : ∀ (i : ι), IsOpen[inst✝²] (U i)
hf : LocallyFinite U
hU : s ⊆ ⋃ i, U i
⊢ ∃ f, f.IsSubordinate U ∧ ∀ (i : ι), HasCompactSupport ⇑(f i)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
i : ι
x : X
h : (f i) x = 0
⊢ f.toPOUFun i x = 0

Tactic:
by

Goal state after:
Module: Mathlib.Topology.ShrinkingLemma

Goal state before:
pp: case h
ι : Type u_1
X : Type u_2
inst✝² : TopologicalSpace X
u : ι → Set X
s : Set X
inst✝¹ : T2Space X
inst✝ : LocallyCompactSpace X
v : PartialRefinement u s fun w ↦ IsCompact (closure w)
hs : IsCompact s
i : ι
hi : i ∉ v.carrier
si : Set X := ⋯
hsi : si = s ∩ ⋂ i_1, ⋂ (_ : ¬i_1 = i), (v.toFun i_1)ᶜ
hsic : IsCompact si
this : si ⊆ v.toFun i
vi : Set X
hvi : IsOpen vi ∧ si ⊆ vi ∧ closure vi ⊆ v.toFun i ∧ IsCompact (closure vi)
x : X
hx : x ∈ s
h : ∀ (j : ι), j ≠ i → x ∉ v.toFun j
⊢ x ∈ update v.toFun i vi i

Tactic:
rw [update_self]

Goal state after:
case h
ι : Type u_1
X : Type u_2
inst✝² : TopologicalSpace X
u : ι → Set X
s : Set X
inst✝¹ : T2Space X
inst✝ : LocallyCompactSpace X
v : PartialRefinement u s fun w ↦ IsCompact (closure w)
hs : IsCompact s
i : ι
hi : i ∉ v.carrier
si : Set X := s ∩ (⋃ j, ⋃ (_ : j ≠ i), v.toFun j)ᶜ
hsi : si = s ∩ ⋂ i_1, ⋂ (_ : ¬i_1 = i), (v.toFun i_1)ᶜ
hsic : IsCompact si
this : si ⊆ v.toFun i
vi : Set X
hvi : IsOpen vi ∧ si ⊆ vi ∧ closure vi ⊆ v.toFun i ∧ IsCompact (closure vi)
x : X
hx : x ∈ s
h : ∀ (j : ι), j ≠ i → x ∉ v.toFun j
⊢ x ∈ vi
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹² : NormedAddCommGroup E
inst✝¹¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹⁰ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
F : Type u_5
inst✝⁷ : NormedAddCommGroup F
inst✝⁶ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝⁵ : TopologicalSpace (TotalSpace F V)
inst✝⁴ : (x : M) → TopologicalSpace (V x)
inst✝³ : FiberBundle F V
inst✝² : (x : M) → AddCommGroup (V x)
inst✝¹ : (x : M) → Module 𝕜 (V x)
inst✝ : VectorBundle 𝕜 F V
s : Cₛ^n⟮I; F, V⟯
k : ℕ
⊢ ⇑(k • s) = k • ⇑s

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
i : ι
x : X
t : Finset ι
ht : ∀ (j : ι), WellOrderingRel j i → (f j) x ≠ 0 → j ∈ t
⊢ f.toPOUFun i x = (f i) x * ∏ j ∈ t with WellOrderingRel j i, (1 - (f j) x)

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹² : NormedAddCommGroup E
inst✝¹¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹⁰ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
F : Type u_5
inst✝⁷ : NormedAddCommGroup F
inst✝⁶ : NormedSpace 𝕜 F
n : ℕ∞ω
V : M → Type u_6
inst✝⁵ : TopologicalSpace (TotalSpace F V)
inst✝⁴ : (x : M) → TopologicalSpace (V x)
inst✝³ : FiberBundle F V
inst✝² : (x : M) → AddCommGroup (V x)
inst✝¹ : (x : M) → Module 𝕜 (V x)
inst✝ : VectorBundle 𝕜 F V
s : Cₛ^n⟮I; F, V⟯
z : ℤ
⊢ ⇑(z • s) = z • ⇑s

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s✝ : Set X
f : BumpCovering ι X s✝
x : X
s : Finset ι := ⋯.toFinset
hs : ↑s = {i | (f i) x ≠ 0}
⊢ (support fun i ↦ f.toPOUFun i x) ⊆ ↑s

Tactic:
by

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorBundle.ContMDiffSection

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹⁰ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁹ : NormedAddCommGroup E
inst✝⁸ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁷ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁶ : TopologicalSpace M
inst✝⁵ : ChartedSpace H M
F : Type u_5
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace 𝕜 F
V : M → Type u_6
inst✝² : TopologicalSpace (TotalSpace F V)
inst✝¹ : (x : M) → TopologicalSpace (V x)
inst✝ : FiberBundle F V
s : Cₛ^∞⟮I; F, V⟯
⊢ ∞ ≠ 0

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s✝ : Set X
f : BumpCovering ι X s✝
x : X
s : Finset ι := ⋯.toFinset
hs : ↑s = {i | (f i) x ≠ 0}
A : (support fun i ↦ f.toPOUFun i x) ⊆ ↑s
⊢ (mulSupport fun i ↦ 1 - (f i) x) ⊆ ↑s

Tactic:
by

Goal state after:
Module: Mathlib.Analysis.Convex.PartitionOfUnity

Goal state before:
pp: X : Type u_2
E : Type u_3
inst✝⁷ : TopologicalSpace X
inst✝⁶ : AddCommGroup E
inst✝⁵ : Module ℝ E
inst✝⁴ : NormalSpace X
inst✝³ : ParacompactSpace X
inst✝² : TopologicalSpace E
inst✝¹ : ContinuousAdd E
inst✝ : ContinuousSMul ℝ E
t : X → Set E
ht : ∀ (x : X), Convex ℝ (t x)
H : ∀ (x : X), ∃ U ∈ 𝓝 x, ∃ g, ContinuousOn g U ∧ ∀ y ∈ U, g y ∈ t y
⊢ ∃ g, ∀ (x : X), g x ∈ t x

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
x : X
this : ∀ (i : ι), x ∈ K i → ∀ᶠ (p : ℝ≥0∞ × X) in 𝓝 0 ×ˢ 𝓝 x, closedEBall p.2 p.1 ⊆ U i
⊢ ∀ᶠ (p : ℝ≥0∞ × X) in 𝓝 0 ×ˢ 𝓝 x, ∀ (i : ι), p.2 ∈ K i → closedEBall p.2 p.1 ⊆ U i

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
x : X
i : ι
hi : x ∈ K i
R : ℝ≥0∞
hR₀ : 0 < R
hR : closedEBall x R ⊆ U i
r : ℝ≥0
hr₀ : 0 < ↑r
hrR : ↑r < R
p : ℝ≥0∞ × X
hp : p ∈ {x | x < ↑r} ×ˢ closedEBall x (R - ↑r)
z : X
hz : z ∈ closedEBall p.2 p.1
⊢ p.1 < ↑r

Tactic:
exact hp.1

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
x : X
i : ι
hi : x ∈ K i
R : ℝ≥0∞
hR₀ : 0 < R
hR : closedEBall x R ⊆ U i
r : ℝ≥0
hr₀ : 0 < ↑r
hrR : ↑r < R
p : ℝ≥0∞ × X
hp : p ∈ {x | x < ↑r} ×ˢ closedEBall x (R - ↑r)
z : X
hz : z ∈ closedEBall p.2 p.1
⊢ p.1 < ↑r

Tactic:
by

Goal state after:
Module: Mathlib.Topology.ShrinkingLemma

Goal state before:
pp: case refine_3.inl
ι : Type u_1
X : Type u_2
inst✝² : TopologicalSpace X
u : ι → Set X
s : Set X
inst✝¹ : T2Space X
inst✝ : LocallyCompactSpace X
v : PartialRefinement u s fun w ↦ IsCompact (closure w)
hs : IsCompact s
vi : Set X
j : ι
hi : j ∉ v.carrier
si : Set X := s ∩ (⋃ j_1, ⋃ (_ : j_1 ≠ j), v.toFun j_1)ᶜ
hsi : si = s ∩ ⋂ i, ⋂ (_ : ¬i = j), (v.toFun i)ᶜ
hsic : IsCompact si
this : si ⊆ v.toFun j
hvi : IsOpen vi ∧ si ⊆ vi ∧ closure vi ⊆ v.toFun j ∧ IsCompact (closure vi)
⊢ closure (update v.toFun j vi j) ⊆ u j

Tactic:
rw [update_self]

Goal state after:
case refine_3.inl
ι : Type u_1
X : Type u_2
inst✝² : TopologicalSpace X
u : ι → Set X
s : Set X
inst✝¹ : T2Space X
inst✝ : LocallyCompactSpace X
v : PartialRefinement u s fun w ↦ IsCompact (closure w)
hs : IsCompact s
vi : Set X
j : ι
hi : j ∉ v.carrier
si : Set X := s ∩ (⋃ j_1, ⋃ (_ : j_1 ≠ j), v.toFun j_1)ᶜ
hsi : si = s ∩ ⋂ i, ⋂ (_ : ¬i = j), (v.toFun i)ᶜ
hsic : IsCompact si
this : si ⊆ v.toFun j
hvi : IsOpen vi ∧ si ⊆ vi ∧ closure vi ⊆ v.toFun j ∧ IsCompact (closure vi)
⊢ closure vi ⊆ u j
Module: Mathlib.Topology.EMetricSpace.Paracompact

Goal state before:
pp: α : Type u_1
inst✝ : PseudoEMetricSpace α
pow_pos : ∀ (k : ℕ), 0 < 2⁻¹ ^ k
hpow_le : ∀ {m n : ℕ}, m ≤ n → 2⁻¹ ^ n ≤ 2⁻¹ ^ m
h2pow : ∀ (n : ℕ), 2 * 2⁻¹ ^ (n + 1) = 2⁻¹ ^ n
ι : Type u_1
s : ι → Set α
ho : ∀ (a : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (s a)
hcov : ∀ (x : α), ∃ i, x ∈ s i
w✝ : LinearOrder ι
wf : WellFoundedLT ι
ind : α → ι := fun x ↦ ⋯.min {i | x ∈ s i} ⋯
mem_ind : ∀ (x : α), x ∈ s (ind x)
notMem_of_lt_ind : ∀ {x : α} {i : ι}, i < ind x → x ∈ s i → False
D : ℕ → ι → Set α :=
  fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
hD :
  D = fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
Dn :
  ∀ (n : ℕ) (i : ι),
    D n i =
      ⋃ x,
        ⋃ (_ : ind x = i), ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ m < n, ∀ (j : ι), x ∉ D m j), eball x (2⁻¹ ^ n)
memD :
  ∀ {n : ℕ} {i : ι} {y : α},
    y ∈ D n i ↔ ∃ x, ind x = i ∧ eball x (3 * 2⁻¹ ^ n) ⊆ s i ∧ (∀ m < n, ∀ (j : ι), x ∉ D m j) ∧ edist y x < 2⁻¹ ^ n
Dcov : ∀ (x : α), ∃ n i, x ∈ D n i
Dopen : ∀ (n : ℕ) (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (D n i)
HDS : ∀ (n : ℕ) (i : ι), D n i ⊆ s i
x : α
n : ℕ
i : ι
hn : x ∈ D n i
this : D n i ∈ 𝓝 x
k : ℕ
hsub : eball x (2⁻¹ ^ k) ⊆ D n i
B : Set α := eball x (2⁻¹ ^ (n + k + 1))
m : ℕ
hm : n + k + 1 ≤ m
y : α
hyx : y ∈ B
z : α
hym : y ∈ D m (ind z)
_hzi : eball z (3 * 2⁻¹ ^ m) ⊆ s (ind z)
H : ∀ m_1 < m, ∀ (j : ι), z ∉ D m_1 j
hz : edist y z < 2⁻¹ ^ m
hz' : z ∈ eball x (2⁻¹ ^ k)
⊢ n < m

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
x : X
⊢ ∀ᶠ (p : ℝ≥0∞ × X) in 𝓝 0 ×ˢ 𝓝 x, ∀ (i : ι), p.2 ∈ K i → closedEBall p.2 p.1 ⊆ U i

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
x : X
⊢ ∑ᶠ (i : ι), f.toPOUFun i x = 1 - ∏ᶠ (i : ι), (1 - (f i) x)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.EMetricSpace.Paracompact

Goal state before:
pp: α : Type u_1
inst✝ : PseudoEMetricSpace α
pow_pos : ∀ (k : ℕ), 0 < 2⁻¹ ^ k
hpow_le : ∀ {m n : ℕ}, m ≤ n → 2⁻¹ ^ n ≤ 2⁻¹ ^ m
h2pow : ∀ (n : ℕ), 2 * 2⁻¹ ^ (n + 1) = 2⁻¹ ^ n
ι : Type u_1
s : ι → Set α
ho : ∀ (a : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (s a)
hcov : ∀ (x : α), ∃ i, x ∈ s i
w✝ : LinearOrder ι
wf : WellFoundedLT ι
ind : α → ι := fun x ↦ ⋯.min {i | x ∈ s i} ⋯
mem_ind : ∀ (x : α), x ∈ s (ind x)
notMem_of_lt_ind : ∀ {x : α} {i : ι}, i < ind x → x ∈ s i → False
D : ℕ → ι → Set α :=
  fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
hD :
  D = fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
Dn :
  ∀ (n : ℕ) (i : ι),
    D n i =
      ⋃ x,
        ⋃ (_ : ind x = i), ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ m < n, ∀ (j : ι), x ∉ D m j), eball x (2⁻¹ ^ n)
memD :
  ∀ {n : ℕ} {i : ι} {y : α},
    y ∈ D n i ↔ ∃ x, ind x = i ∧ eball x (3 * 2⁻¹ ^ n) ⊆ s i ∧ (∀ m < n, ∀ (j : ι), x ∉ D m j) ∧ edist y x < 2⁻¹ ^ n
Dcov : ∀ (x : α), ∃ n i, x ∈ D n i
Dopen : ∀ (n : ℕ) (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (D n i)
HDS : ∀ (n : ℕ) (i : ι), D n i ⊆ s i
x : α
n : ℕ
i : ι
hn : x ∈ D n i
this✝ : D n i ∈ 𝓝 x
k : ℕ
hsub : eball x (2⁻¹ ^ k) ⊆ D n i
B : Set α := eball x (2⁻¹ ^ (n + k + 1))
m : ℕ
hm : n + k + 1 ≤ m
y : α
hyx : y ∈ B
z : α
hym : y ∈ D m (ind z)
_hzi : eball z (3 * 2⁻¹ ^ m) ⊆ s (ind z)
H : ∀ m_1 < m, ∀ (j : ι), z ∉ D m_1 j
hz : edist y z < 2⁻¹ ^ m
this : z ∉ eball x (2⁻¹ ^ k)
⊢ k + 1 ≤ m

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
i : ι
x : X
⊢ ∃ t, f.toPOUFun i =ᶠ[𝓝 x] ⇑(f i) * ⇑(∏ j ∈ t with WellOrderingRel j i, (1 - f j))

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
i j : ι
x✝ : WellOrderingRel j i
⊢ Continuous[inst✝, _] fun x ↦ 1 - (f j) x

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
i : ι
⊢ Continuous[inst✝, _] (f.toPOUFun i)

Tactic:
by

Goal state after:
Module: Mathlib.Topology.EMetricSpace.Paracompact

Goal state before:
pp: α : Type u_1
inst✝ : PseudoEMetricSpace α
pow_pos : ∀ (k : ℕ), 0 < 2⁻¹ ^ k
hpow_le : ∀ {m n : ℕ}, m ≤ n → 2⁻¹ ^ n ≤ 2⁻¹ ^ m
h2pow : ∀ (n : ℕ), 2 * 2⁻¹ ^ (n + 1) = 2⁻¹ ^ n
ι : Type u_1
s : ι → Set α
ho : ∀ (a : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (s a)
hcov : ∀ (x : α), ∃ i, x ∈ s i
w✝ : LinearOrder ι
wf : WellFoundedLT ι
ind : α → ι := fun x ↦ ⋯.min {i | x ∈ s i} ⋯
mem_ind : ∀ (x : α), x ∈ s (ind x)
notMem_of_lt_ind : ∀ {x : α} {i : ι}, i < ind x → x ∈ s i → False
D : ℕ → ι → Set α :=
  fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
hD :
  D = fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
Dn :
  ∀ (n : ℕ) (i : ι),
    D n i =
      ⋃ x,
        ⋃ (_ : ind x = i), ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ m < n, ∀ (j : ι), x ∉ D m j), eball x (2⁻¹ ^ n)
memD :
  ∀ {n : ℕ} {i : ι} {y : α},
    y ∈ D n i ↔ ∃ x, ind x = i ∧ eball x (3 * 2⁻¹ ^ n) ⊆ s i ∧ (∀ m < n, ∀ (j : ι), x ∉ D m j) ∧ edist y x < 2⁻¹ ^ n
Dcov : ∀ (x : α), ∃ n i, x ∈ D n i
Dopen : ∀ (n : ℕ) (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (D n i)
HDS : ∀ (n : ℕ) (i : ι), D n i ⊆ s i
x : α
n : ℕ
i : ι
hn : x ∈ D n i
this✝ : D n i ∈ 𝓝 x
k : ℕ
hsub : eball x (2⁻¹ ^ k) ⊆ D n i
B : Set α := eball x (2⁻¹ ^ (n + k + 1))
m : ℕ
hm : n + k + 1 ≤ m
y : α
hyx : y ∈ B
z : α
hym : y ∈ D m (ind z)
_hzi : eball z (3 * 2⁻¹ ^ m) ⊆ s (ind z)
H : ∀ m_1 < m, ∀ (j : ι), z ∉ D m_1 j
hz : edist y z < 2⁻¹ ^ m
this : z ∉ eball x (2⁻¹ ^ k)
⊢ k + 1 ≤ n + k + 1

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
x : X
⊢ ∃ r, ∀ᶠ (y : X) in 𝓝 x, r ∈ Ioi 0 ∩ ENNReal.ofReal ⁻¹' ⋂ i, ⋂ (_ : y ∈ K i), {r | closedEBall y r ⊆ U i}

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
x : X
hx : x ∈ s
⊢ ∑ᶠ (i : ι), { toFun := f.toPOUFun i, continuous_toFun := ⋯ } x = 1

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: ι : Type u
X : Type v
inst✝ : TopologicalSpace X
s : Set X
f : BumpCovering ι X s
x : X
⊢ ∑ᶠ (i : ι), { toFun := f.toPOUFun i, continuous_toFun := ⋯ } x ≤ 1

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
⊢ ∃ δ, (∀ (x : X), 0 < δ x) ∧ ∀ (i : ι), ∀ x ∈ K i, closedEBall x (ENNReal.ofReal (δ x)) ⊆ U i

Tactic:
by

Goal state after:
Module: Mathlib.Topology.PartitionOfUnity

Goal state before:
pp: X : Type v
inst✝² : TopologicalSpace X
inst✝¹ : T2Space X
inst✝ : LocallyCompactSpace X
n : ℕ
t : Set X
s : Fin n → Set X
hs : ∀ (i : Fin n), IsOpen[inst✝²] (s i)
htcp : IsCompact t
hst : t ⊆ ⋃ i, s i
f : PartitionOfUnity (Fin n) X t
hfsub : f.IsSubordinate s
hfcp : ∀ (i : Fin n), HasCompactSupport ⇑(f i)
x : X
hx : x ∈ t
h : ∑ i ∈ ⋯.toFinset, (f.toFun i) x = 1
⊢ ∀ (i : Fin n), (f.toFun i) x ≠ 0 → i ∈ ⋯.toFinset

Tactic:
by

Goal state after:
Module: Mathlib.Topology.MetricSpace.PartitionOfUnity

Goal state before:
pp: ι : Type u_1
X : Type u_2
inst✝ : EMetricSpace X
K U : ι → Set X
hK : ∀ (i : ι), IsClosed[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (K i)
hU : ∀ (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (U i)
hKU : ∀ (i : ι), K i ⊆ U i
hfin : LocallyFinite K
⊢ ∃ δ, (∀ (x : X), 0 < δ x) ∧ ∀ (i : ι), ∀ x ∈ K i, closedEBall x ↑(δ x) ⊆ U i

Tactic:
by

Goal state after:
Module: Mathlib.Topology.EMetricSpace.Paracompact

Goal state before:
pp: α : Type u_1
inst✝ : PseudoEMetricSpace α
pow_pos : ∀ (k : ℕ), 0 < 2⁻¹ ^ k
hpow_le : ∀ {m n : ℕ}, m ≤ n → 2⁻¹ ^ n ≤ 2⁻¹ ^ m
h2pow : ∀ (n : ℕ), 2 * 2⁻¹ ^ (n + 1) = 2⁻¹ ^ n
ι : Type u_1
s : ι → Set α
ho : ∀ (a : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (s a)
hcov : ∀ (x : α), ∃ i, x ∈ s i
w✝ : LinearOrder ι
wf : WellFoundedLT ι
ind : α → ι := fun x ↦ ⋯.min {i | x ∈ s i} ⋯
mem_ind : ∀ (x : α), x ∈ s (ind x)
notMem_of_lt_ind : ∀ {x : α} {i : ι}, i < ind x → x ∈ s i → False
D : ℕ → ι → Set α :=
  fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
hD :
  D = fun t ↦
    Nat.strongRec (motive := fun x ↦ ι → Set α)
      (fun n D' i ↦
        ⋃ x,
          ⋃ (_ : ind x = i),
            ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ (m : ℕ) (H : m < n) (j : ι), x ∉ D' m H j), eball x (2⁻¹ ^ n))
      t
Dn :
  ∀ (n : ℕ) (i : ι),
    D n i =
      ⋃ x,
        ⋃ (_ : ind x = i), ⋃ (_ : eball x (3 * 2⁻¹ ^ n) ⊆ s i), ⋃ (_ : ∀ m < n, ∀ (j : ι), x ∉ D m j), eball x (2⁻¹ ^ n)
memD :
  ∀ {n : ℕ} {i : ι} {y : α},
    y ∈ D n i ↔ ∃ x, ind x = i ∧ eball x (3 * 2⁻¹ ^ n) ⊆ s i ∧ (∀ m < n, ∀ (j : ι), x ∉ D m j) ∧ edist y x < 2⁻¹ ^ n
Dcov : ∀ (x : α), ∃ n i, x ∈ D n i
Dopen : ∀ (n : ℕ) (i : ι), IsOpen[PseudoEMetricSpace.toUniformSpace.toTopologicalSpace] (D n i)
HDS : ∀ (n : ℕ) (i : ι), D n i ⊆ s i
x : α
n : ℕ
i : ι
hn : x ∈ D n i
this✝ : D n i ∈ 𝓝 x
k : ℕ
hsub : eball x (2⁻¹ ^ k) ⊆ D n i
B : Set α := eball x (2⁻¹ ^ (n + k + 1))
m : ℕ
hm : n + k + 1 ≤ m
y : α
hyx : y ∈ B
z : α
hym : y ∈ D m (ind z)
_hzi : eball z (3 * 2⁻¹ ^ m) ⊆ s (ind z)
H : ∀ m_1 < m, ∀ (j : ι), z ∉ D m_1 j
hz : edist y z < 2⁻¹ ^ m
this : z ∉ eball x (2⁻¹ ^ k)
⊢ 2⁻¹ ^ (k + 1) + 2⁻¹ ^ (k + 1) = 2⁻¹ ^ k

Tactic:
by

Goal state after: