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

Goal state before:
pp: H : Type u_1
M : Type u_2
H' : Type u_3
M' : Type u_4
inst✝⁵ : TopologicalSpace H
inst✝⁴ : TopologicalSpace M
inst✝³ : ChartedSpace H M
inst✝² : TopologicalSpace H'
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
s : Set M
x : M
hG : G.LocalInvariantProp G' P
f : M → M'
⊢ ContinuousWithinAt f s x ∧
      P (↑(chartAt H' (f x)) ∘ f ∘ ↑(chartAt H x).symm) (↑(chartAt H x).symm ⁻¹' s) (↑(chartAt H x) x) ↔
    ContinuousWithinAt f s x ∧
      P (↑(chartAt H' (f x)) ∘ f ∘ ↑(chartAt H x).symm)
        ((chartAt H x).target ∩ ↑(chartAt H x).symm ⁻¹' (s ∩ f ⁻¹' (chartAt H' (f x)).source)) (↑(chartAt H x) x)

Tactic:
refine and_congr_right fun hf ↦ hG.congr_set ?_

Goal state after:
H : Type u_1
M : Type u_2
H' : Type u_3
M' : Type u_4
inst✝⁵ : TopologicalSpace H
inst✝⁴ : TopologicalSpace M
inst✝³ : ChartedSpace H M
inst✝² : TopologicalSpace H'
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
s : Set M
x : M
hG : G.LocalInvariantProp G' P
f : M → M'
hf : ContinuousWithinAt f s x
⊢ ↑(chartAt H x).symm ⁻¹' s =ᶠ[𝓝 (↑(chartAt H x) x)]
    (chartAt H x).target ∩ ↑(chartAt H x).symm ⁻¹' (s ∩ f ⁻¹' (chartAt H' (f x)).source)
Module: Mathlib.MeasureTheory.Function.Jacobian

Goal state before:
pp: case inr.refine_1
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
inst✝³ : FiniteDimensional ℝ E
s : Set E
f : E → E
f' : E → E →L[ℝ] E
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
hs : MeasurableSet s
hf' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
hf : InjOn f s
ε : ℝ≥0
εpos : 0 < ε
A : E →L[ℝ] E
δ' : ℝ
δ'pos : 0 < δ'
hδ' : ∀ (B : E →L[ℝ] E), dist B A < δ' → dist B.det A.det < ↑ε
δ'' : ℝ≥0 := ⟨δ' / 2, ⋯⟩
I'' : ∀ (B : E →L[ℝ] E), ‖B - A‖ ≤ ↑δ'' → |B.det - A.det| ≤ ↑ε
hA : A.det ≠ 0
m : ℝ≥0 := |A.det|.toNNReal - ε
I : ↑m < ENNReal.ofReal |A.det|
δ : ℝ≥0
h : ∀ (s : Set E) (f : E → E), ApproximatesLinearOn f A s δ → ↑m * μ s ≤ μ (f '' s)
δpos : 0 < δ
⊢ ∀ (B : E →L[ℝ] E), ‖B - A‖ ≤ ↑(min δ δ'') → |B.det - A.det| ≤ ↑ε

pp: case inr.refine_2
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
inst✝³ : FiniteDimensional ℝ E
s : Set E
f : E → E
f' : E → E →L[ℝ] E
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
hs : MeasurableSet s
hf' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
hf : InjOn f s
ε : ℝ≥0
εpos : 0 < ε
A : E →L[ℝ] E
δ' : ℝ
δ'pos : 0 < δ'
hδ' : ∀ (B : E →L[ℝ] E), dist B A < δ' → dist B.det A.det < ↑ε
δ'' : ℝ≥0 := ⟨δ' / 2, ⋯⟩
I'' : ∀ (B : E →L[ℝ] E), ‖B - A‖ ≤ ↑δ'' → |B.det - A.det| ≤ ↑ε
hA : A.det ≠ 0
m : ℝ≥0 := |A.det|.toNNReal - ε
I : ↑m < ENNReal.ofReal |A.det|
δ : ℝ≥0
h : ∀ (s : Set E) (f : E → E), ApproximatesLinearOn f A s δ → ↑m * μ s ≤ μ (f '' s)
δpos : 0 < δ
⊢ ∀ (t : Set E) (g : E → E),
    ApproximatesLinearOn g A t (min δ δ'') → ENNReal.ofReal |A.det| * μ t ≤ μ (g '' t) + ↑ε * μ t

Tactic:
· intro B hB
      apply I'' _ (hB.trans _)
      simp only [le_refl, NNReal.coe_min, min_le_iff, or_true]

Goal state after:
case inr.refine_2
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
inst✝³ : FiniteDimensional ℝ E
s : Set E
f : E → E
f' : E → E →L[ℝ] E
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
hs : MeasurableSet s
hf' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
hf : InjOn f s
ε : ℝ≥0
εpos : 0 < ε
A : E →L[ℝ] E
δ' : ℝ
δ'pos : 0 < δ'
hδ' : ∀ (B : E →L[ℝ] E), dist B A < δ' → dist B.det A.det < ↑ε
δ'' : ℝ≥0 := ⟨δ' / 2, ⋯⟩
I'' : ∀ (B : E →L[ℝ] E), ‖B - A‖ ≤ ↑δ'' → |B.det - A.det| ≤ ↑ε
hA : A.det ≠ 0
m : ℝ≥0 := |A.det|.toNNReal - ε
I : ↑m < ENNReal.ofReal |A.det|
δ : ℝ≥0
h : ∀ (s : Set E) (f : E → E), ApproximatesLinearOn f A s δ → ↑m * μ s ≤ μ (f '' s)
δpos : 0 < δ
⊢ ∀ (t : Set E) (g : E → E),
    ApproximatesLinearOn g A t (min δ δ'') → ENNReal.ofReal |A.det| * μ t ≤ μ (g '' t) + ↑ε * μ t
Module: Mathlib.Geometry.Manifold.IsManifold.ExtChartAt

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
M : Type u_3
H : Type u_4
inst✝⁴ : NontriviallyNormedField 𝕜
inst✝³ : NormedAddCommGroup E
inst✝² : NormedSpace 𝕜 E
inst✝¹ : TopologicalSpace H
inst✝ : TopologicalSpace M
I : ModelWithCorners 𝕜 E H
e e' : OpenPartialHomeomorph M H
⊢ (extendCoordChange e e').source = ↑I '' (e.symm ≫ₕ e').source

Tactic:
simp_rw [extendCoordChange, PartialEquiv.trans_source, I.image_eq, e'.extend_source,
    PartialEquiv.symm_source, e.extend_target, inter_right_comm _ (range I)]
  simp [Set.preimage_comp]

Goal state after:
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: n : ℕ∞ω
𝕜 : Type u_1
inst✝³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
s : Set H
hs : IsOpen[inst✝] s
⊢ OpenPartialHomeomorph.ofSet s hs ∈ contDiffGroupoid n I

Tactic:
rw [contDiffGroupoid, mem_groupoid_of_pregroupoid]

Goal state after:
n : ℕ∞ω
𝕜 : Type u_1
inst✝³ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace 𝕜 E
H : Type u_3
inst✝ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
s : Set H
hs : IsOpen[inst✝] s
⊢ (contDiffPregroupoid n I).property (↑(OpenPartialHomeomorph.ofSet s hs)) (OpenPartialHomeomorph.ofSet s hs).source ∧
    (contDiffPregroupoid n I).property (↑(OpenPartialHomeomorph.ofSet s hs).symm)
      (OpenPartialHomeomorph.ofSet s hs).target
Module: Mathlib.Geometry.Manifold.LocalInvariantProperties

Goal state before:
pp: case mp.refine_2
H : Type u_1
inst✝¹ : TopologicalSpace H
G : StructureGroupoid H
inst✝ : ClosedUnderRestriction G
f : OpenPartialHomeomorph H H
s : Set H
x : H
hx : x ∈ f.source ∪ sᶜ
hf : G.IsLocalStructomorphWithinAt (↑f) s x
h2x : x ∈ s
e : OpenPartialHomeomorph H H
he : e ∈ G
hfe : EqOn (↑f) (↑e.toPartialEquiv) (s ∩ e.source)
hxe : x ∈ e.source
⊢ EqOn (↑f) (↑(e.restr f.source)) (s ∩ (e.restr f.source).source)

pp: case mp.refine_3
H : Type u_1
inst✝¹ : TopologicalSpace H
G : StructureGroupoid H
inst✝ : ClosedUnderRestriction G
f : OpenPartialHomeomorph H H
s : Set H
x : H
hx : x ∈ f.source ∪ sᶜ
hf : G.IsLocalStructomorphWithinAt (↑f) s x
h2x : x ∈ s
e : OpenPartialHomeomorph H H
he : e ∈ G
hfe : EqOn (↑f) (↑e.toPartialEquiv) (s ∩ e.source)
hxe : x ∈ e.source
⊢ x ∈ interior f.source

Tactic:
· intro x' hx'
      exact hfe ⟨hx'.1, hx'.2.1⟩

Goal state after:
case mp.refine_3
H : Type u_1
inst✝¹ : TopologicalSpace H
G : StructureGroupoid H
inst✝ : ClosedUnderRestriction G
f : OpenPartialHomeomorph H H
s : Set H
x : H
hx : x ∈ f.source ∪ sᶜ
hf : G.IsLocalStructomorphWithinAt (↑f) s x
h2x : x ∈ s
e : OpenPartialHomeomorph H H
he : e ∈ G
hfe : EqOn (↑f) (↑e.toPartialEquiv) (s ∩ e.source)
hxe : x ∈ e.source
⊢ x ∈ interior f.source
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
E' : Type u_5
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁴ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
n : ℕ∞ω
M' : Type u_7
inst✝³ : TopologicalSpace M'
inst✝² : ChartedSpace H' M'
inst✝¹ : IsManifold I n M
inst✝ : IsManifold I' n M'
e : OpenPartialHomeomorph M H
he : e ∈ maximalAtlas I n M
e' : OpenPartialHomeomorph M' H'
he' : e' ∈ maximalAtlas I' n M'
f : OpenPartialHomeomorph M H
hf : f ∈ atlas H M
f' : OpenPartialHomeomorph M' H'
hf' : f' ∈ atlas H' M'
⊢ (e.symm ≫ₕ f).prod (e'.symm ≫ₕ f') ∈ contDiffGroupoid n (I.prod I') ∧
    (f.symm ≫ₕ e).prod (f'.symm ≫ₕ e') ∈ contDiffGroupoid n (I.prod I')

Tactic:
constructor <;>
    apply contDiffGroupoid_prod <;> grind [compatible_of_mem_maximalAtlas, subset_maximalAtlas]

Goal state after:
Module: Mathlib.Geometry.Manifold.ContMDiff.Defs

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
E' : Type u_5
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝² : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
f : M → M'
n : ℕ∞ω
⊢ ContMDiffOn I I' n f univ ↔ ContMDiff I I' n f

Tactic:
by
  simp only [ContMDiffOn, ContMDiff, contMDiffWithinAt_univ, forall_prop_of_true, mem_univ]

Goal state after:
Module: Mathlib.Geometry.Manifold.ContMDiff.Defs

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
E' : Type u_5
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝² : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
f : M → M'
s : Set M
x : M
n : ℕ∞ω
cont : ContinuousWithinAt f s x ∧ ContinuousWithinAt (↑(extChartAt I' (f x)) ∘ f) s x ↔ ContinuousWithinAt f s x
⊢ ContinuousWithinAt f s x ∧
      ContDiffWithinAtProp I I' n (↑(chartAt H' (f x)) ∘ f ∘ ↑(chartAt H x).symm) (↑(chartAt H x).symm ⁻¹' s)
        (↑(chartAt H x) x) ↔
    (ContinuousWithinAt f s x ∧ ContinuousWithinAt (↑(extChartAt I' (f x)) ∘ f) s x) ∧
      ContDiffWithinAtProp I 𝓘(𝕜, E') n
        (↑(chartAt E' ((↑(extChartAt I' (f x)) ∘ f) x)) ∘ (↑(extChartAt I' (f x)) ∘ f) ∘ ↑(chartAt H x).symm)
        (↑(chartAt H x).symm ⁻¹' s) (↑(chartAt H x) x)

Tactic:
simp_rw [cont, ContDiffWithinAtProp, extChartAt, OpenPartialHomeomorph.extend,
    PartialEquiv.coe_trans, ModelWithCorners.toPartialEquiv_coe,
    OpenPartialHomeomorph.coe_toPartialEquiv, modelWithCornersSelf_coe, chartAt_self_eq,
    OpenPartialHomeomorph.refl_apply, id_comp]

Goal state after:
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
E' : Type u_5
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝² : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
f : M → M'
s : Set M
x : M
n : ℕ∞ω
cont : ContinuousWithinAt f s x ∧ ContinuousWithinAt (↑(extChartAt I' (f x)) ∘ f) s x ↔ ContinuousWithinAt f s x
⊢ ContinuousWithinAt f s x ∧
      ContDiffWithinAt 𝕜 n (↑I' ∘ (↑(chartAt H' (f x)) ∘ f ∘ ↑(chartAt H x).symm) ∘ ↑I.symm)
        (↑I.symm ⁻¹' ↑(chartAt H x).symm ⁻¹' s ∩ range ↑I) (↑I (↑(chartAt H x) x)) ↔
    ContinuousWithinAt f s x ∧
      ContDiffWithinAt 𝕜 n ((((↑I' ∘ ↑(chartAt H' (f x))) ∘ f) ∘ ↑(chartAt H x).symm) ∘ ↑I.symm)
        (↑I.symm ⁻¹' ↑(chartAt H x).symm ⁻¹' s ∩ range ↑I) (↑I (↑(chartAt H x) x))
Module: Mathlib.Geometry.Manifold.ContMDiff.Defs

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
E' : Type u_5
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝² : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
f : M → M'
s : Set M
x : M
n : ℕ∞ω
⊢ ContMDiffWithinAt I I' n f s x ↔
    ContinuousWithinAt f s x ∧ ContMDiffWithinAt I 𝓘(𝕜, E') n (↑(extChartAt I' (f x)) ∘ f) s x

Tactic:
simp_rw [ContMDiffWithinAt, liftPropWithinAt_iff', ← and_assoc]
  have cont :
    ContinuousWithinAt f s x ∧ ContinuousWithinAt (extChartAt I' (f x) ∘ f) s x ↔
        ContinuousWithinAt f s x :=
      and_iff_left_of_imp <| (continuousAt_extChartAt _).comp_continuousWithinAt
  simp_rw [cont, ContDiffWithinAtProp, extChartAt, OpenPartialHomeomorph.extend,
    PartialEquiv.coe_trans, ModelWithCorners.toPartialEquiv_coe,
    OpenPartialHomeomorph.coe_toPartialEquiv, modelWithCornersSelf_coe, chartAt_self_eq,
    OpenPartialHomeomorph.refl_apply, id_comp]
  rfl

Goal state after:
Module: Mathlib.Geometry.Manifold.ContMDiff.Constructions

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
n : WithTop ℕ∞
E' : Type u_17
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_18
inst✝⁴ : TopologicalSpace H'
J : ModelWithCorners 𝕜 E' H'
N : Type u_20
N' : Type u_21
inst✝³ : TopologicalSpace N
inst✝² : TopologicalSpace N'
inst✝¹ : ChartedSpace H' N
inst✝ : ChartedSpace H' N'
f : M → N
h : ContMDiff I J n (Sum.inl ∘ f)
a✝ : Nontrivial N
inhabited_h : Inhabited N
⊢ ContMDiff I J n f

Tactic:
let aux : N ⊕ N' → N := Sum.elim (@id N) (fun _ ↦ inhabited_h.default)

Goal state after:
𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
n : WithTop ℕ∞
E' : Type u_17
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_18
inst✝⁴ : TopologicalSpace H'
J : ModelWithCorners 𝕜 E' H'
N : Type u_20
N' : Type u_21
inst✝³ : TopologicalSpace N
inst✝² : TopologicalSpace N'
inst✝¹ : ChartedSpace H' N
inst✝ : ChartedSpace H' N'
f : M → N
h : ContMDiff I J n (Sum.inl ∘ f)
a✝ : Nontrivial N
inhabited_h : Inhabited N
aux : N ⊕ N' → N := Sum.elim id fun x ↦ default
⊢ ContMDiff I J n f
Module: Mathlib.Geometry.Manifold.Algebra.Monoid

Goal state before:
pp: ι : Type u_1
𝕜 : Type u_2
inst✝¹² : NontriviallyNormedField 𝕜
n : ℕ∞ω
H : Type u_3
inst✝¹¹ : TopologicalSpace H
E : Type u_4
inst✝¹⁰ : NormedAddCommGroup E
inst✝⁹ : NormedSpace 𝕜 E
I : ModelWithCorners 𝕜 E H
G : Type u_5
inst✝⁸ : CommMonoid G
inst✝⁷ : TopologicalSpace G
inst✝⁶ : ChartedSpace H G
inst✝⁵ : ContMDiffMul I n G
E' : Type u_6
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_7
inst✝² : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M : Type u_8
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace H' M
x₀ : M
t : Finset ι
f : ι → M → G
h : ∀ i ∈ t, ContMDiffAt I' I n (f i) x₀
⊢ ContMDiffAt I' I n (fun x ↦ ∏ i ∈ t, f i x) x₀

Tactic:
simp only [← contMDiffWithinAt_univ] at *
  exact ContMDiffWithinAt.prod h

Goal state after:
Module: Mathlib.Geometry.Manifold.ContMDiff.Defs

Goal state before:
pp: case refine_2
𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
E' : Type u_5
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁴ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝³ : TopologicalSpace M'
inst✝² : ChartedSpace H' M'
f : M → M'
s✝ : Set M
x : M
n : ℕ∞ω
inst✝¹ : IsManifold I n M
inst✝ : IsManifold I' n M'
hn : n ≠ ∞
s : Set M
hxs : x ∈ s
h : ContMDiffWithinAt I I' n f s x
v : Set E
hmem :
  v ∈
    𝓝[(extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)] ↑(extChartAt I x) x
hsub : v ⊆ (extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)
hv : ContDiffOn 𝕜 n (↑(extChartAt I' (f x)) ∘ f ∘ ↑(extChartAt I x).symm) v
hxs' :
  ↑(extChartAt I x) x ∈ (extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)
hv₁ : ↑(extChartAt I x).symm '' v ⊆ (extChartAt I x).source
hv₂ : MapsTo f (↑(extChartAt I x).symm '' v) (extChartAt I' (f x)).source
⊢ ContMDiffOn I I' n f (↑(extChartAt I x).symm '' v)

Tactic:
rwa [contMDiffOn_iff_of_subset_source' hv₁ hv₂, PartialEquiv.image_symm_image_of_subset_target]

Goal state after:
case refine_2.h
𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
E' : Type u_5
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁴ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝³ : TopologicalSpace M'
inst✝² : ChartedSpace H' M'
f : M → M'
s✝ : Set M
x : M
n : ℕ∞ω
inst✝¹ : IsManifold I n M
inst✝ : IsManifold I' n M'
hn : n ≠ ∞
s : Set M
hxs : x ∈ s
h : ContMDiffWithinAt I I' n f s x
v : Set E
hmem :
  v ∈
    𝓝[(extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)] ↑(extChartAt I x) x
hsub : v ⊆ (extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)
hv : ContDiffOn 𝕜 n (↑(extChartAt I' (f x)) ∘ f ∘ ↑(extChartAt I x).symm) v
hxs' :
  ↑(extChartAt I x) x ∈ (extChartAt I x).target ∩ ↑(extChartAt I x).symm ⁻¹' (s ∩ f ⁻¹' (extChartAt I' (f x)).source)
hv₁ : ↑(extChartAt I x).symm '' v ⊆ (extChartAt I x).source
hv₂ : MapsTo f (↑(extChartAt I x).symm '' v) (extChartAt I' (f x)).source
⊢ v ⊆ (extChartAt I x).target
Module: Mathlib.Geometry.Manifold.ContMDiff.Defs

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
E' : Type u_5
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁴ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝³ : TopologicalSpace M'
inst✝² : ChartedSpace H' M'
f : M → M'
x : M
n : ℕ∞ω
inst✝¹ : IsManifold I n M
inst✝ : IsManifold I' n M'
hn : n ≠ ∞
⊢ ContMDiffAt I I' n f x → ∀ᶠ (x' : M) in 𝓝 x, ContMDiffAt I I' n f x'

Tactic:
contMDiffAt_iff_contMDiffOn_nhds hn

Goal state after:
𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁹ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁸ : TopologicalSpace M
inst✝⁷ : ChartedSpace H M
E' : Type u_5
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁴ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝³ : TopologicalSpace M'
inst✝² : ChartedSpace H' M'
f : M → M'
x : M
n : ℕ∞ω
inst✝¹ : IsManifold I n M
inst✝ : IsManifold I' n M'
hn : n ≠ ∞
⊢ (∃ u ∈ 𝓝 x, ContMDiffOn I I' n f u) → ∀ᶠ (x' : M) in 𝓝 x, ContMDiffAt I I' n f x'
Module: Mathlib.Geometry.Manifold.MFDeriv.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁵ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁴ : NormedAddCommGroup E
inst✝³ : NormedSpace 𝕜 E
H : Type u_3
inst✝² : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace H M
x : M
⊢ UniqueDiffWithinAt 𝕜 (↑(extChartAt I x).symm ⁻¹' univ ∩ range ↑I) (↑(extChartAt I x) x)

Tactic:
simp only [preimage_univ, univ_inter]

Goal state after:
𝕜 : Type u_1
inst✝⁵ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁴ : NormedAddCommGroup E
inst✝³ : NormedSpace 𝕜 E
H : Type u_3
inst✝² : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace H M
x : M
⊢ UniqueDiffWithinAt 𝕜 (range ↑I) (↑(extChartAt I x) x)
Module: Mathlib.Geometry.Manifold.MFDeriv.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹¹ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹⁰ : NormedAddCommGroup E
inst✝⁹ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁸ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁷ : TopologicalSpace M
inst✝⁶ : ChartedSpace H M
E' : Type u_5
inst✝⁵ : NormedAddCommGroup E'
inst✝⁴ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝³ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝² : TopologicalSpace M'
inst✝¹ : ChartedSpace H' M'
f : M → M'
x : M
inst✝ : IsManifold I 1 M
x' : M
hx' : x' ∈ (chartAt H x).source
⊢ MDiffAt[univ] f x' ↔ MDiffAt[range ↑I] (f ∘ ↑(extChartAt I x).symm) (↑(extChartAt I x) x')

Tactic:
mdifferentiableWithinAt_iff_source_of_mem_source hx',

Goal state after:
𝕜 : Type u_1
inst✝¹¹ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝¹⁰ : NormedAddCommGroup E
inst✝⁹ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁸ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁷ : TopologicalSpace M
inst✝⁶ : ChartedSpace H M
E' : Type u_5
inst✝⁵ : NormedAddCommGroup E'
inst✝⁴ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝³ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝² : TopologicalSpace M'
inst✝¹ : ChartedSpace H' M'
f : M → M'
x : M
inst✝ : IsManifold I 1 M
x' : M
hx' : x' ∈ (chartAt H x).source
⊢ MDiffAt[↑(extChartAt I x).symm ⁻¹' univ ∩ range ↑I] (f ∘ ↑(extChartAt I x).symm) (↑(extChartAt I x) x') ↔
    MDiffAt[range ↑I] (f ∘ ↑(extChartAt I x).symm) (↑(extChartAt I x) x')
Module: Mathlib.Topology.FiberBundle.Constructions

Goal state before:
pp: B : Type u_1
inst✝⁶ : TopologicalSpace B
F₁ : Type u_2
inst✝⁵ : TopologicalSpace F₁
E₁ : B → Type u_3
inst✝⁴ : TopologicalSpace (TotalSpace F₁ E₁)
F₂ : Type u_4
inst✝³ : TopologicalSpace F₂
E₂ : B → Type u_5
inst✝² : TopologicalSpace (TotalSpace F₂ E₂)
e₁ : Trivialization F₁ TotalSpace.proj
e₂ : Trivialization F₂ TotalSpace.proj
inst✝¹ : (x : B) → Zero (E₁ x)
inst✝ : (x : B) → Zero (E₂ x)
x : B
v₁ : E₁ x
v₂ : E₂ x
h : { proj := x, snd := (v₁, v₂) } ∈ TotalSpace.proj ⁻¹' (e₁.baseSet ∩ e₂.baseSet)
⊢ invFun' e₁ e₂ (toFun' e₁ e₂ { proj := x, snd := (v₁, v₂) }) = { proj := x, snd := (v₁, v₂) }

Tactic:
obtain ⟨h₁ : x ∈ e₁.baseSet, h₂ : x ∈ e₂.baseSet⟩ := h

Goal state after:
B : Type u_1
inst✝⁶ : TopologicalSpace B
F₁ : Type u_2
inst✝⁵ : TopologicalSpace F₁
E₁ : B → Type u_3
inst✝⁴ : TopologicalSpace (TotalSpace F₁ E₁)
F₂ : Type u_4
inst✝³ : TopologicalSpace F₂
E₂ : B → Type u_5
inst✝² : TopologicalSpace (TotalSpace F₂ E₂)
e₁ : Trivialization F₁ TotalSpace.proj
e₂ : Trivialization F₂ TotalSpace.proj
inst✝¹ : (x : B) → Zero (E₁ x)
inst✝ : (x : B) → Zero (E₂ x)
x : B
v₁ : E₁ x
v₂ : E₂ x
h₁ : x ∈ e₁.baseSet
h₂ : x ∈ e₂.baseSet
⊢ invFun' e₁ e₂ (toFun' e₁ e₂ { proj := x, snd := (v₁, v₂) }) = { proj := x, snd := (v₁, v₂) }
Module: Mathlib.Geometry.Manifold.MFDeriv.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁵ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁴ : NormedAddCommGroup E
inst✝³ : NormedSpace 𝕜 E
H : Type u_3
inst✝² : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace H M
x : M
s t : Set M
y : M
h : s =ᶠ[𝓝[{y}ᶜ] x] t
⊢ ↑(extChartAt I x).symm ⁻¹' s ∩ range ↑I =ᶠ[𝓝[≠] ↑(extChartAt I x) x] ↑(extChartAt I x).symm ⁻¹' t ∩ range ↑I

Tactic:
have : T1Space M := I.t1Space M
  obtain ⟨u, u_mem, hu⟩ : ∃ u ∈ 𝓝 x, u ∩ {x}ᶜ ⊆ {y | (y ∈ s) = (y ∈ t)} :=
    mem_nhdsWithin_iff_exists_mem_nhds_inter.1 (nhdsWithin_compl_singleton_le x y h)
  rw [← extChartAt_to_inv (I := I) x] at u_mem
  have B : (extChartAt I x).target ∪ (range I)ᶜ ∈ 𝓝 (extChartAt I x x) := by
    rw [← nhdsWithin_univ, ← union_compl_self (range I), nhdsWithin_union]
    apply Filter.union_mem_sup (extChartAt_target_mem_nhdsWithin x) self_mem_nhdsWithin
  apply mem_nhdsWithin_iff_exists_mem_nhds_inter.2
    ⟨_, Filter.inter_mem ((continuousAt_extChartAt_symm x).preimage_mem_nhds u_mem) B, ?_⟩
  rintro z ⟨hz, h'z⟩
  simp only [eq_iff_iff, mem_ofPred_eq]
  change z ∈ (extChartAt I x).symm ⁻¹' s ∩ range I ↔ z ∈ (extChartAt I x).symm ⁻¹' t ∩ range I
  by_cases hIz : z ∈ range I
  · simp only [mem_inter_iff, mem_preimage, mem_union, mem_compl_iff, hIz, not_true_eq_false,
      or_false, and_true] at hz ⊢
    rw [← eq_iff_iff]
    apply hu ⟨hz.1, ?_⟩
    push _ ∈ _ at h'z ⊢
    rw [eq_comm, (extChartAt I x).eq_symm_apply (by simp) hz.2]
    exact Ne.symm h'z
  · simp [hIz]

Goal state after: