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

Goal state before:
pp: case left
n : ℕ∞ω
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
E' : Type u_5
H' : Type u_6
inst✝² : NormedAddCommGroup E'
inst✝¹ : NormedSpace 𝕜 E'
inst✝ : TopologicalSpace H'
I : ModelWithCorners 𝕜 E H
I' : ModelWithCorners 𝕜 E' H'
e : OpenPartialHomeomorph H H
e' : OpenPartialHomeomorph H' H'
he : (contDiffPregroupoid n I).property (↑e) e.source
he_symm : (contDiffPregroupoid n I).property (↑e.symm) e.target
he' : (contDiffPregroupoid n I').property (↑e') e'.source
he'_symm : (contDiffPregroupoid n I').property (↑e'.symm) e'.target
h3 : ContDiffOn 𝕜 n (Prod.map (↑I ∘ ↑e ∘ ↑I.symm) (↑I' ∘ ↑e' ∘ ↑I'.symm)) ((↑I '' e.source) ×ˢ (↑I' '' e'.source))
⊢ ContDiffOn 𝕜 n (↑(I.prod I') ∘ ↑(e.prod e') ∘ ↑(I.prod I').symm)
    (↑(I.prod I').symm ⁻¹' (e.prod e'.toPartialEquiv).source ∩ range ↑(I.prod I'))

Tactic:
prod_image_image_eq

Goal state after:
case left
n : ℕ∞ω
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
E' : Type u_5
H' : Type u_6
inst✝² : NormedAddCommGroup E'
inst✝¹ : NormedSpace 𝕜 E'
inst✝ : TopologicalSpace H'
I : ModelWithCorners 𝕜 E H
I' : ModelWithCorners 𝕜 E' H'
e : OpenPartialHomeomorph H H
e' : OpenPartialHomeomorph H' H'
he : (contDiffPregroupoid n I).property (↑e) e.source
he_symm : (contDiffPregroupoid n I).property (↑e.symm) e.target
he' : (contDiffPregroupoid n I').property (↑e') e'.source
he'_symm : (contDiffPregroupoid n I').property (↑e'.symm) e'.target
h3 :
  ContDiffOn 𝕜 n (Prod.map (↑I ∘ ↑e ∘ ↑I.symm) (↑I' ∘ ↑e' ∘ ↑I'.symm))
    ((fun p ↦ (↑I p.1, ↑I' p.2)) '' e.source ×ˢ e'.source)
⊢ ContDiffOn 𝕜 n (↑(I.prod I') ∘ ↑(e.prod e') ∘ ↑(I.prod I').symm)
    (↑(I.prod I').symm ⁻¹' (e.prod e'.toPartialEquiv).source ∩ range ↑(I.prod I'))
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✝⁶ : NontriviallyNormedField 𝕜
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : TopologicalSpace H
inst✝² : TopologicalSpace M
I : ModelWithCorners 𝕜 E H
inst✝¹ : ChartedSpace H M
inst✝ : I.Boundaryless
x : M
⊢ IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (extChartAt I x).target

Tactic:
extChartAt_target,

Goal state after:
𝕜 : Type u_1
E : Type u_2
M : Type u_3
H : Type u_4
inst✝⁶ : NontriviallyNormedField 𝕜
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : TopologicalSpace H
inst✝² : TopologicalSpace M
I : ModelWithCorners 𝕜 E H
inst✝¹ : ChartedSpace H M
inst✝ : I.Boundaryless
x : M
⊢ IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (↑I.symm ⁻¹' (chartAt H x).target ∩ range ↑I)
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✝⁶ : NontriviallyNormedField 𝕜
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : TopologicalSpace H
inst✝² : TopologicalSpace M
I : ModelWithCorners 𝕜 E H
inst✝¹ : ChartedSpace H M
inst✝ : I.Boundaryless
x : M
⊢ IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (extChartAt I x).target

Tactic:
simp_rw [extChartAt_target, I.range_eq_univ, inter_univ]

Goal state after:
𝕜 : Type u_1
E : Type u_2
M : Type u_3
H : Type u_4
inst✝⁶ : NontriviallyNormedField 𝕜
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : TopologicalSpace H
inst✝² : TopologicalSpace M
I : ModelWithCorners 𝕜 E H
inst✝¹ : ChartedSpace H M
inst✝ : I.Boundaryless
x : M
⊢ IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (↑I.symm ⁻¹' (chartAt H x).target)
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: case right
n : ℕ∞ω
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
E' : Type u_5
H' : Type u_6
inst✝² : NormedAddCommGroup E'
inst✝¹ : NormedSpace 𝕜 E'
inst✝ : TopologicalSpace H'
I : ModelWithCorners 𝕜 E H
I' : ModelWithCorners 𝕜 E' H'
e : OpenPartialHomeomorph H H
e' : OpenPartialHomeomorph H' H'
he : (contDiffPregroupoid n I).property (↑e) e.source
he_symm : (contDiffPregroupoid n I).property (↑e.symm) e.target
he' : (contDiffPregroupoid n I').property (↑e') e'.source
he'_symm : (contDiffPregroupoid n I').property (↑e'.symm) e'.target
h3 :
  ContDiffOn 𝕜 n (Prod.map (↑I ∘ ↑e.symm ∘ ↑I.symm) (↑I' ∘ ↑e'.symm ∘ ↑I'.symm))
    ((↑I '' e.target) ×ˢ (↑I' '' e'.target))
⊢ ContDiffOn 𝕜 n (↑(I.prod I') ∘ ↑(e.prod e').symm ∘ ↑(I.prod I').symm)
    (↑(I.prod I').symm ⁻¹' (e.prod e'.toPartialEquiv).target ∩ range ↑(I.prod I'))

Tactic:
prod_image_image_eq

Goal state after:
case right
n : ℕ∞ω
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
E' : Type u_5
H' : Type u_6
inst✝² : NormedAddCommGroup E'
inst✝¹ : NormedSpace 𝕜 E'
inst✝ : TopologicalSpace H'
I : ModelWithCorners 𝕜 E H
I' : ModelWithCorners 𝕜 E' H'
e : OpenPartialHomeomorph H H
e' : OpenPartialHomeomorph H' H'
he : (contDiffPregroupoid n I).property (↑e) e.source
he_symm : (contDiffPregroupoid n I).property (↑e.symm) e.target
he' : (contDiffPregroupoid n I').property (↑e') e'.source
he'_symm : (contDiffPregroupoid n I').property (↑e'.symm) e'.target
h3 :
  ContDiffOn 𝕜 n (Prod.map (↑I ∘ ↑e.symm ∘ ↑I.symm) (↑I' ∘ ↑e'.symm ∘ ↑I'.symm))
    ((fun p ↦ (↑I p.1, ↑I' p.2)) '' e.target ×ˢ e'.target)
⊢ ContDiffOn 𝕜 n (↑(I.prod I') ∘ ↑(e.prod e').symm ∘ ↑(I.prod I').symm)
    (↑(I.prod I').symm ⁻¹' (e.prod e'.toPartialEquiv).target ∩ range ↑(I.prod I'))
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: case inr.inr
𝕜 : Type u_1
inst✝⁷ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁶ : NormedAddCommGroup E
inst✝⁵ : NormedSpace 𝕜 E
H : Type u_3
inst✝⁴ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
n : ℕ∞ω
M : Type u_4
inst✝³ : TopologicalSpace M
inst✝² : ChartedSpace H M
M' : Type u_5
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H M'
hM : IsManifold I n M
hM' : IsManifold I n M'
e e' : OpenPartialHomeomorph (M ⊕ M') H
he : e ∈ atlas H (M ⊕ M')
he' : e' ∈ atlas H (M ⊕ M')
h : Nonempty H
f : OpenPartialHomeomorph M' H
hf : f ∈ atlas H M'
hef : e = f.lift_openEmbedding ⋯
⊢ e.symm ≫ₕ e' ∈ contDiffGroupoid n I

Tactic:
obtain (⟨f', hf', he'f'⟩ | ⟨f', hf', he'f'⟩) := ChartedSpace.mem_atlas_sum he'
      · rw [hef, he'f']
        apply ContDiffGroupoid.mem_of_source_eq_empty
        ext x
        exact ⟨fun ⟨hx₁, hx₂⟩ ↦ by simp_all, fun hx ↦ hx.elim⟩
      · rw [hef, he'f', f.lift_openEmbedding_trans f' IsOpenEmbedding.inr]
        exact hM'.compatible hf hf'

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

Goal state before:
pp: case refine_1
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_8
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace 𝕜 F
G : Type u_9
inst✝² : TopologicalSpace G
J : ModelWithCorners 𝕜 F G
N : Type u_10
inst✝¹ : TopologicalSpace N
inst✝ : ChartedSpace G N
n : WithTop ℕ∞
s : Set (M × N)
p : M × N
y : E × F
hy :
  y ∈
    (extChartAt (I.prod J) p).target ∩ ↑(extChartAt (I.prod J) p).symm ⁻¹' (s ∩ Prod.fst ⁻¹' (extChartAt I p.1).source)
⊢ (↑(extChartAt I p.1) ∘ Prod.fst ∘ ↑(extChartAt (I.prod J) p).symm) y = y.1

Tactic:
exact (extChartAt I p.1).right_inv ⟨hy.1.1.1, hy.1.2.1⟩

Goal state after:
Module: Mathlib.Geometry.Manifold.ContMDiff.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
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
inst✝¹ : ChartedSpace H' M'
f : M → M'
n : ℕ∞ω
inst✝ : DiscreteTopology M
x : M
⊢ ContMDiffAt I I' n f x

Tactic:
apply contMDiff_const (c := f x).contMDiffAt.congr_of_eventuallyEq

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
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
inst✝¹ : ChartedSpace H' M'
f : M → M'
n : ℕ∞ω
inst✝ : DiscreteTopology M
x : M
⊢ f =ᶠ[𝓝 x] fun x_1 ↦ f x
Module: Mathlib.Geometry.Manifold.ContMDiff.Constructions

Goal state before:
pp: case inl.h₁
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
M' : Type u_16
inst✝⁶ : TopologicalSpace M'
inst✝⁵ : ChartedSpace H M'
n : WithTop ℕ∞
E' : Type u_17
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_18
inst✝² : TopologicalSpace H'
J : ModelWithCorners 𝕜 E' H'
N : Type u_20
inst✝¹ : TopologicalSpace N
inst✝ : ChartedSpace H' N
f : M → N
g : M' → N
hf : ContMDiff I J n f
hg : ContMDiff I J n g
x : M
this :
  ContDiffWithinAt 𝕜 n (↑(extChartAt J (f x)) ∘ f ∘ ↑(extChartAt I x).symm) (range ↑I)
    (↑(extChartAt I (Sum.inl x)) (Sum.inl x))
⊢ ↑(extChartAt J (Sum.elim f g (Sum.inl x))) ∘
      Sum.elim f g ∘ ↑(extChartAt I (Sum.inl x)).symm =ᶠ[𝓝[range ↑I] ↑(extChartAt I (Sum.inl x)) (Sum.inl x)]
    ↑(extChartAt J (f x)) ∘ f ∘ ↑(extChartAt I x).symm

Tactic:
simp only [extChartAt, Sum.elim_inl, ChartedSpace.sum_chartAt_inl]

Goal state after:
case inl.h₁
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
M' : Type u_16
inst✝⁶ : TopologicalSpace M'
inst✝⁵ : ChartedSpace H M'
n : WithTop ℕ∞
E' : Type u_17
inst✝⁴ : NormedAddCommGroup E'
inst✝³ : NormedSpace 𝕜 E'
H' : Type u_18
inst✝² : TopologicalSpace H'
J : ModelWithCorners 𝕜 E' H'
N : Type u_20
inst✝¹ : TopologicalSpace N
inst✝ : ChartedSpace H' N
f : M → N
g : M' → N
hf : ContMDiff I J n f
hg : ContMDiff I J n g
x : M
this :
  ContDiffWithinAt 𝕜 n (↑(extChartAt J (f x)) ∘ f ∘ ↑(extChartAt I x).symm) (range ↑I)
    (↑(extChartAt I (Sum.inl x)) (Sum.inl x))
⊢ ↑((chartAt H' (f x)).extend J) ∘
      Sum.elim f g ∘
        ↑(((chartAt H x).lift_openEmbedding ⋯).extend
              I).symm =ᶠ[𝓝[range ↑I] ↑(((chartAt H x).lift_openEmbedding ⋯).extend I) (Sum.inl x)]
    ↑((chartAt H' (f x)).extend J) ∘ f ∘ ↑((chartAt H x).extend I).symm
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'
e : OpenPartialHomeomorph M H
f : M → M'
s : Set M
x : M
n : ℕ∞ω
he : e ∈ maximalAtlas I n M
hx : x ∈ e.source
h2x : x ∈ (e.extend I).source
⊢ ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      ContDiffWithinAtProp I I' n (↑(chartAt H' ((f ∘ ↑e.symm) (↑e x))) ∘ f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ↔
    ContinuousWithinAt (f ∘ ↑(e.extend I).symm) (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x) ∧
      ContDiffWithinAtProp 𝓘(𝕜, E) I' n
        (↑(chartAt H' ((f ∘ ↑(e.extend I).symm) (↑(e.extend I) x))) ∘ f ∘ ↑(e.extend I).symm)
        (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x)

Tactic:
e.extend_symm_continuousWithinAt_comp_right_iff,

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'
e : OpenPartialHomeomorph M H
f : M → M'
s : Set M
x : M
n : ℕ∞ω
he : e ∈ maximalAtlas I n M
hx : x ∈ e.source
h2x : x ∈ (e.extend I).source
⊢ ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      ContDiffWithinAtProp I I' n (↑(chartAt H' ((f ∘ ↑e.symm) (↑e x))) ∘ f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ↔
    ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      ContDiffWithinAtProp 𝓘(𝕜, E) I' n
        (↑(chartAt H' ((f ∘ ↑(e.extend I).symm) (↑(e.extend I) x))) ∘ f ∘ ↑(e.extend I).symm)
        (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x)
Module: Mathlib.MeasureTheory.Function.Jacobian

Goal state before:
pp: E : Type u_1
F : Type u_2
inst✝⁷ : NormedAddCommGroup E
inst✝⁶ : NormedSpace ℝ E
inst✝⁵ : FiniteDimensional ℝ E
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace ℝ F
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
g : E → F
⊢ Integrable ((g ∘ f) ∘ Subtype.val) (Measure.comap Subtype.val (μ.withDensity fun x ↦ ↑|(f' x).det|.toNNReal)) ↔
    IntegrableOn (fun x ↦ |(f' x).det| • g (f x)) s μ

Tactic:
← (MeasurableEmbedding.subtype_coe hs).integrable_map_iff,

Goal state after:
E : Type u_1
F : Type u_2
inst✝⁷ : NormedAddCommGroup E
inst✝⁶ : NormedSpace ℝ E
inst✝⁵ : FiniteDimensional ℝ E
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace ℝ F
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
g : E → F
⊢ Integrable (g ∘ f)
      (Measure.map Subtype.val (Measure.comap Subtype.val (μ.withDensity fun x ↦ ↑|(f' x).det|.toNNReal))) ↔
    IntegrableOn (fun x ↦ |(f' x).det| • g (f x)) s μ
Module: Mathlib.MeasureTheory.Function.Jacobian

Goal state before:
pp: E : Type u_1
F : Type u_2
inst✝⁷ : NormedAddCommGroup E
inst✝⁶ : NormedSpace ℝ E
inst✝⁵ : FiniteDimensional ℝ E
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace ℝ F
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
g : E → F
⊢ ∫ (x : E),
      g
        x ∂Measure.map (s.domRestrict f)
        (Measure.comap Subtype.val (μ.withDensity fun x ↦ ENNReal.ofReal |(f' x).det|)) =
    ∫ (x : E) in s, |(f' x).det| • g (f x) ∂μ

Tactic:
(measurableEmbedding_of_fderivWithin hs hf' hf).integral_map

Goal state after:
E : Type u_1
F : Type u_2
inst✝⁷ : NormedAddCommGroup E
inst✝⁶ : NormedSpace ℝ E
inst✝⁵ : FiniteDimensional ℝ E
inst✝⁴ : NormedAddCommGroup F
inst✝³ : NormedSpace ℝ F
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
g : E → F
⊢ ∫ (x : ↑s), g (s.domRestrict f x) ∂Measure.comap Subtype.val (μ.withDensity fun x ↦ ENNReal.ofReal |(f' x).det|) =
    ∫ (x : E) in s, |(f' x).det| • g (f x) ∂μ
Module: Mathlib.MeasureTheory.Function.Jacobian

Goal state before:
pp: 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 : MeasurableEmbedding f
g : E → ℝ
hg : ∀ᵐ (x : E) ∂μ, x ∈ f '' s → 0 ≤ g x
hg_int : IntegrableOn g (f '' s) μ
hf' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
⊢ ENNReal.ofReal (∫ (x : E) in f '' s, g x ∂μ) = ENNReal.ofReal (∫ (x : E) in s, |(f' x).det| * g (f x) ∂μ)

Tactic:
integral_image_eq_integral_abs_det_fderiv_smul μ hs hf' hf.injective.injOn

Goal state after:
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 : MeasurableEmbedding f
g : E → ℝ
hg : ∀ᵐ (x : E) ∂μ, x ∈ f '' s → 0 ≤ g x
hg_int : IntegrableOn g (f '' s) μ
hf' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
⊢ ENNReal.ofReal (∫ (x : E) in s, |(f' x).det| • g (f x) ∂μ) =
    ENNReal.ofReal (∫ (x : E) in s, |(f' x).det| * g (f x) ∂μ)
Module: Mathlib.Geometry.Manifold.Algebra.Monoid

Goal state before:
pp: case empty
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
s : Set M
x₀ : M
t : Finset ι
f : ι → M → G
h : ∀ i ∈ ∅, ContMDiffWithinAt I' I n (f i) s x₀
⊢ ContMDiffWithinAt I' I n (fun x ↦ ∏ i ∈ ∅, f i x) s x₀

Tactic:
| empty =>

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

Goal state before:
pp: 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
n : ℕ∞ω
x : E
hx : x ∈ range ↑I
⊢ ContMDiffWithinAt 𝓘(𝕜, E) I n (↑I.symm) (range ↑I) x

Tactic:
apply contMDiffWithinAt_iff.mpr ⟨by fun_prop, ?_⟩

Goal state after:
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
n : ℕ∞ω
x : E
hx : x ∈ range ↑I
⊢ ContDiffWithinAt 𝕜 n (↑(extChartAt I (↑I.symm x)) ∘ ↑I.symm ∘ ↑(extChartAt 𝓘(𝕜, E) x).symm)
    (↑(extChartAt 𝓘(𝕜, E) x).symm ⁻¹' range ↑I ∩ range ↑𝓘(𝕜, E)) (↑(extChartAt 𝓘(𝕜, E) x) x)
Module: Mathlib.Geometry.Manifold.ContMDiff.Atlas

Goal state before:
pp: 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
n : ℕ∞ω
x : E
hx : x ∈ range ↑I
⊢ (↑I ∘ ↑I.symm) x = id x

Tactic:
by simp [hx]

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

Goal state before:
pp: case e'_23
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
n : ℕ∞ω
inst✝ : IsManifold I n M
x : M
⊢ (extChartAt I x).target = ↑I '' (chartAt H x).target

Tactic:
extChartAt_target,

Goal state after:
case e'_23
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
H : Type u_3
inst✝³ : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
n : ℕ∞ω
inst✝ : IsManifold I n M
x : M
⊢ ↑I.symm ⁻¹' (chartAt H x).target ∩ range ↑I = ↑I '' (chartAt H x).target
Module: Mathlib.Geometry.Manifold.MFDeriv.Basic

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'
x : M
s : Set M
e : OpenPartialHomeomorph M H
he : e ∈ maximalAtlas I 1 M
hx : x ∈ e.source
h2x : x ∈ (e.extend I).source
⊢ ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      DifferentiableWithinAtProp I I' (↑(chartAt H' ((f ∘ ↑e.symm) (↑e x))) ∘ f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ↔
    ContinuousWithinAt (f ∘ ↑(e.extend I).symm) (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x) ∧
      DifferentiableWithinAtProp 𝓘(𝕜, E) I'
        (↑(chartAt H' ((f ∘ ↑(e.extend I).symm) (↑(e.extend I) x))) ∘ f ∘ ↑(e.extend I).symm)
        (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x)

Tactic:
e.extend_symm_continuousWithinAt_comp_right_iff,

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'
x : M
s : Set M
e : OpenPartialHomeomorph M H
he : e ∈ maximalAtlas I 1 M
hx : x ∈ e.source
h2x : x ∈ (e.extend I).source
⊢ ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      DifferentiableWithinAtProp I I' (↑(chartAt H' ((f ∘ ↑e.symm) (↑e x))) ∘ f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ↔
    ContinuousWithinAt (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) ∧
      DifferentiableWithinAtProp 𝓘(𝕜, E) I'
        (↑(chartAt H' ((f ∘ ↑(e.extend I).symm) (↑(e.extend I) x))) ∘ f ∘ ↑(e.extend I).symm)
        (↑(e.extend I).symm ⁻¹' s ∩ range ↑I) (↑(e.extend I) x)
Module: Mathlib.Geometry.Manifold.VectorBundle.Basic

Goal state before:
pp: B : Type u_2
F : Type u_4
E : B → Type u_6
inst✝⁶ : TopologicalSpace F
inst✝⁵ : TopologicalSpace (TotalSpace F E)
inst✝⁴ : (x : B) → TopologicalSpace (E x)
HB : Type u_7
inst✝³ : TopologicalSpace HB
inst✝² : TopologicalSpace B
inst✝¹ : ChartedSpace HB B
inst✝ : FiberBundle F E
x : TotalSpace F E
y : ModelProd HB F
hy : y ∈ (chartAt (ModelProd HB F) x).target
⊢ (↑(chartAt (ModelProd HB F) x).symm y).proj = ↑(chartAt HB x.proj).symm y.1

Tactic:
by
  simp only [FiberBundle.chartedSpace_chartAt, mfld_simps] at hy ⊢
  exact (trivializationAt F E x.proj).proj_symm_apply hy.2

Goal state after: