mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Analysis.Calculus.ImplicitFunction.ProdDomain

Goal state before:
pp: case disjoint
𝕜 : Type u_1
inst✝⁹ : NontriviallyNormedField 𝕜
E₁ : Type u_2
inst✝⁸ : NormedAddCommGroup E₁
inst✝⁷ : NormedSpace 𝕜 E₁
inst✝⁶ : CompleteSpace E₁
E₂ : Type u_3
inst✝⁵ : NormedAddCommGroup E₂
inst✝⁴ : NormedSpace 𝕜 E₂
inst✝³ : CompleteSpace E₂
F : Type u_4
inst✝² : NormedAddCommGroup F
inst✝¹ : NormedSpace 𝕜 F
inst✝ : CompleteSpace F
u : E₁ × E₂
f : E₁ × E₂ → F
f'u : E₁ × E₂ →L[𝕜] F
dfu : HasStrictFDerivAt f f'u u
if₂u : (f'u ∘SL ContinuousLinearMap.inr 𝕜 E₁ E₂).IsInvertible
y : E₂
h : (0, y) ∈ (↑f'u).ker
⊢ (0, y) = 0

Tactic:
simpa using (injective_iff_map_eq_zero _).mp if₂u.injective y h

Goal state after:
Module: Mathlib.Analysis.Calculus.Implicit

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁹ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁸ : NormedAddCommGroup E
inst✝⁷ : NormedSpace 𝕜 E
inst✝⁶ : CompleteSpace E
F : Type u_3
inst✝⁵ : NormedAddCommGroup F
inst✝⁴ : NormedSpace 𝕜 F
inst✝³ : CompleteSpace F
G : Type u_4
inst✝² : NormedAddCommGroup G
inst✝¹ : NormedSpace 𝕜 G
inst✝ : CompleteSpace G
φ : ImplicitFunctionData 𝕜 E F G
this :
  ∀ᶠ (x : F × G) in 𝓝 (φ.leftFun φ.pt, φ.rightFun φ.pt),
    φ.leftFun (φ.implicitFunction (φ.leftFun φ.pt, x.2).1 (φ.leftFun φ.pt, x.2).2) = (φ.leftFun φ.pt, x.2).1
⊢ ∀ᶠ (x : E) in 𝓝 φ.pt, φ.leftFun (φ.implicitFunction (φ.leftFun φ.pt) (φ.rightFun x)) = φ.leftFun φ.pt

Tactic:
rwa [← prodFun_apply, ← φ.hasStrictFDerivAt.map_nhds_eq_of_equiv, eventually_map] at this

Goal state after:
Module: Mathlib.Analysis.Calculus.Implicit

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁹ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝⁸ : NormedAddCommGroup E
inst✝⁷ : NormedSpace 𝕜 E
inst✝⁶ : CompleteSpace E
F : Type u_3
inst✝⁵ : NormedAddCommGroup F
inst✝⁴ : NormedSpace 𝕜 F
inst✝³ : CompleteSpace F
G : Type u_4
inst✝² : NormedAddCommGroup G
inst✝¹ : NormedSpace 𝕜 G
inst✝ : CompleteSpace G
φ : ImplicitFunctionData 𝕜 E F G
this :
  ∀ᶠ (x : F × G) in 𝓝 (φ.leftFun φ.pt, φ.rightFun φ.pt),
    φ.rightFun (φ.implicitFunction (φ.leftFun φ.pt, x.2).1 (φ.leftFun φ.pt, x.2).2) = (φ.leftFun φ.pt, x.2).2
⊢ ∀ᶠ (x : E) in 𝓝 φ.pt, φ.rightFun (φ.implicitFunction (φ.leftFun φ.pt) (φ.rightFun x)) = φ.rightFun x

Tactic:
rwa [← prodFun_apply, ← φ.hasStrictFDerivAt.map_nhds_eq_of_equiv, eventually_map] at this

Goal state after:
Module: Mathlib.MeasureTheory.Function.JacobianOneDim

Goal state before:
pp: F : Type u_1
inst✝¹ : NormedAddCommGroup F
inst✝ : NormedSpace ℝ F
s : Set ℝ
f f' : ℝ → ℝ
hs : MeasurableSet s
hf' : ∀ x ∈ s, HasDerivWithinAt f (f' x) s x
hf : InjOn f s
g : ℝ → F
⊢ ∫ (x : ℝ) in f '' s, g x = ∫ (x : ℝ) in s, |f' x| • g (f x)

Tactic:
simpa only [det_toSpanSingleton] using
    integral_image_eq_integral_abs_det_fderiv_smul volume hs
      (fun x hx => (hf' x hx).hasFDerivWithinAt) hf g

Goal state after:
Module: Mathlib.MeasureTheory.Function.JacobianOneDim

Goal state before:
pp: case refine_6
s : Set ℝ
f f' : ℝ → ℝ
hs : MeasurableSet s
hf : MonotoneOn f s
hf' : ∀ x ∈ s, HasDerivWithinAt f (f' x) s x
a : Set ℝ := {x | x ∈ s ∧ 𝓝[s ∩ Ioi x] x = ⊥} ∪ {x | x ∈ s ∧ 𝓝[s ∩ Iio x] x = ⊥}
a_count : a.Countable
s₁ : Set ℝ := s \ a
hs₁ : MeasurableSet s₁
u : Set ℝ := {c | ∃ x y, x ∈ s₁ ∧ y ∈ s₁ ∧ x < y ∧ f x = c ∧ f y = c}
hu : u.Countable
b : Set ℝ := s₁ ∩ f ⁻¹' u
hb : MeasurableSet b
c : Set ℝ := s₁ \ b
hc : MeasurableSet c
x : ℝ
hx : x ∈ c
⊢ 0 ≤ f' x

Tactic:
apply (hf' x hx.1.1).nonneg_of_monotoneOn _ hf

Goal state after:
s : Set ℝ
f f' : ℝ → ℝ
hs : MeasurableSet s
hf : MonotoneOn f s
hf' : ∀ x ∈ s, HasDerivWithinAt f (f' x) s x
a : Set ℝ := ⋯
a_count : a.Countable
s₁ : Set ℝ := ⋯
hs₁ : MeasurableSet s₁
u : Set ℝ := ⋯
hu : u.Countable
b : Set ℝ := ⋯
hb : MeasurableSet b
c : Set ℝ := ⋯
hc : MeasurableSet c
x : ℝ
hx : x ∈ c
⊢ AccPt x (𝓟 s)
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
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
A : E →L[ℝ] E
m : ℝ≥0
hm : ENNReal.ofReal |A.det| < ↑m
d : ℝ≥0∞ := ENNReal.ofReal |A.det|
ε : ℝ
hε : μ (closedBall 0 ε + ⇑A '' closedBall 0 1) < ↑m * μ (closedBall 0 1)
εpos : 0 < ε
this : Iio (NNReal.mk ε ⋯) ∈ 𝓝 0
δ : ℝ≥0
s : Set E
f : E → E
hf : ApproximatesLinearOn f A s δ
hδ : ↑δ < ε
x : E
r : ℝ
xs : x ∈ s
r0 : 0 ≤ r
⊢ f '' (s ∩ closedBall x r) ⊆ ⇑A '' closedBall 0 r + closedBall (f x) (ε * r)

Tactic:
rintro y ⟨z, ⟨zs, zr⟩, rfl⟩

Goal state after:
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
inst✝³ : FiniteDimensional ℝ E
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
A : E →L[ℝ] E
m : ℝ≥0
hm : ENNReal.ofReal |A.det| < ↑m
d : ℝ≥0∞ := ENNReal.ofReal |A.det|
ε : ℝ
hε : μ (closedBall 0 ε + ⇑A '' closedBall 0 1) < ↑m * μ (closedBall 0 1)
εpos : 0 < ε
this : Iio (NNReal.mk ε ⋯) ∈ 𝓝 0
δ : ℝ≥0
s : Set E
f : E → E
hf : ApproximatesLinearOn f A s δ
hδ : ↑δ < ε
x : E
r : ℝ
xs : x ∈ s
r0 : 0 ≤ r
z : E
zs : z ∈ s
zr : z ∈ closedBall x r
⊢ f z ∈ ⇑A '' closedBall 0 r + closedBall (f x) (ε * r)
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
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
A : E →L[ℝ] E
m : ℝ≥0
hm : ↑m < ENNReal.ofReal |A.det|
mpos : 0 < m
⊢ A.det ≠ 0

Tactic:
intro h

Goal state after:
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
inst✝³ : FiniteDimensional ℝ E
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
A : E →L[ℝ] E
m : ℝ≥0
hm : ↑m < ENNReal.ofReal |A.det|
mpos : 0 < m
h : A.det = 0
⊢ False
Module: Mathlib.MeasureTheory.Integral.IntegralEqImproper

Goal state before:
pp: E : Type u_1
f f' : ℝ → E
a : ℝ
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : CompleteSpace E
hderiv : ∀ x ∈ Ioi a, HasDerivAt f (f' x) x
f'int : IntegrableOn f' (Ioi a) volume
ε : ℝ
εpos : ε > 0
A : ∀ᶠ (n : ℕ) in atTop, ∫ (x : ℝ) in Ici ↑n, ‖f' x‖ < ε
B : ∀ᶠ (n : ℕ) in atTop, a < ↑n
N : ℕ
hN : ∫ (x : ℝ) in Ici ↑N, ‖f' x‖ < ε
h'N : a < ↑N
⊢ ∃ N, ∀ n ≥ N, dist (f n) (f N) < ε

Tactic:
refine ⟨N, fun x hx ↦ ?_⟩

Goal state after:
E : Type u_1
f f' : ℝ → E
a : ℝ
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : CompleteSpace E
hderiv : ∀ x ∈ Ioi a, HasDerivAt f (f' x) x
f'int : IntegrableOn f' (Ioi a) volume
ε : ℝ
εpos : ε > 0
A : ∀ᶠ (n : ℕ) in atTop, ∫ (x : ℝ) in Ici ↑n, ‖f' x‖ < ε
B : ∀ᶠ (n : ℕ) in atTop, a < ↑n
N : ℕ
hN : ∫ (x : ℝ) in Ici ↑N, ‖f' x‖ < ε
h'N : a < ↑N
x : ℝ
hx : x ≥ ↑N
⊢ dist (f x) (f ↑N) < ε
Module: Mathlib.MeasureTheory.Integral.IntegralEqImproper

Goal state before:
pp: E : Type u_1
f f' : ℝ → E
a : ℝ
m : E
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : CompleteSpace E
hcont✝ : ContinuousWithinAt f (Ici a) a
hderiv : ∀ x ∈ Ioi a, HasDerivAt f (f' x) x
f'int : IntegrableOn f' (Ioi a) volume
hf : Tendsto f atTop (𝓝 m)
hcont : ContinuousOn f (Ici a)
x : ℝ
hx : x ∈ Ioi a
h'x : a ≤ id x
⊢ IntervalIntegrable f' volume a (id x)

Tactic:
intervalIntegrable_iff_integrableOn_Ioc_of_le h'x

Goal state after:
E : Type u_1
f f' : ℝ → E
a : ℝ
m : E
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : CompleteSpace E
hcont✝ : ContinuousWithinAt f (Ici a) a
hderiv : ∀ x ∈ Ioi a, HasDerivAt f (f' x) x
f'int : IntegrableOn f' (Ioi a) volume
hf : Tendsto f atTop (𝓝 m)
hcont : ContinuousOn f (Ici a)
x : ℝ
hx : x ∈ Ioi a
h'x : a ≤ id x
⊢ IntegrableOn f' (Ioc a (id x)) volume
Module: Mathlib.MeasureTheory.Integral.IntegralEqImproper

Goal state before:
pp: g g' : ℝ → ℝ
a l : ℝ
hcont✝ : ContinuousWithinAt g (Ici a) a
hderiv : ∀ x ∈ Ioi a, HasDerivAt g (g' x) x
g'pos : ∀ x ∈ Ioi a, 0 ≤ g' x
hg : Tendsto g atTop (𝓝 l)
hcont : ContinuousOn g (Ici a)
x : ℝ
hx : x ∈ Ioi a
h'x : a ≤ id x
⊢ IntervalIntegrable g' volume a (id x)

Tactic:
intervalIntegrable_iff_integrableOn_Ioc_of_le h'x

Goal state after:
g g' : ℝ → ℝ
a l : ℝ
hcont✝ : ContinuousWithinAt g (Ici a) a
hderiv : ∀ x ∈ Ioi a, HasDerivAt g (g' x) x
g'pos : ∀ x ∈ Ioi a, 0 ≤ g' x
hg : Tendsto g atTop (𝓝 l)
hcont : ContinuousOn g (Ici a)
x : ℝ
hx : x ∈ Ioi a
h'x : a ≤ id x
⊢ IntegrableOn g' (Ioc a (id x)) volume
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
inst✝² : MeasurableSpace E
inst✝¹ : BorelSpace E
μ : Measure E
inst✝ : μ.IsAddHaarMeasure
hf : DifferentiableOn ℝ f s
hs : μ s = 0
δ : (E →L[ℝ] E) → ℝ≥0
hδ :
  ∀ (A : E →L[ℝ] E),
    0 < δ A ∧ ∀ (t : Set E), ApproximatesLinearOn f A t (δ A) → μ (f '' t) ≤ ↑(|A.det|.toNNReal + 1) * μ t
t : ℕ → Set E
A : ℕ → E →L[ℝ] E
left✝¹ : Pairwise (Disjoint on t)
left✝ : ∀ (n : ℕ), MeasurableSet (t n)
t_cover : s ⊆ ⋃ n, t n
ht : ∀ (n : ℕ), ApproximatesLinearOn f (A n) (s ∩ t n) (δ (A n))
⊢ μ (f '' s) ≤ μ (⋃ n, f '' (s ∩ t n))

Tactic:
apply measure_mono
      rw [← image_iUnion, ← inter_iUnion]
      exact Set.image_mono (subset_inter Subset.rfl t_cover)

Goal state after:
Module: Mathlib.MeasureTheory.Integral.IntegralEqImproper

Goal state before:
pp: case inl
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
f : ℝ → E
p : ℝ
hp : p ≠ 0
S : Set ℝ := Ioi 0
a1 : ∀ x ∈ S, HasDerivWithinAt (fun t ↦ t ^ p) (p * x ^ (p - 1)) S x
h : p < 0
x : ℝ
hx : x ∈ S
y : ℝ
hy : y ∈ S
hxy : x < y
⊢ (fun x ↦ x ^ p) y < (fun x ↦ x ^ p) x

Tactic:
rw [← inv_lt_inv₀ (rpow_pos_of_pos hx p) (rpow_pos_of_pos hy p), ← rpow_neg (le_of_lt hx), ←
        rpow_neg (le_of_lt hy)]

Goal state after:
case inl
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
f : ℝ → E
p : ℝ
hp : p ≠ 0
S : Set ℝ := Ioi 0
a1 : ∀ x ∈ S, HasDerivWithinAt (fun t ↦ t ^ p) (p * x ^ (p - 1)) S x
h : p < 0
x : ℝ
hx : x ∈ S
y : ℝ
hy : y ∈ S
hxy : x < y
⊢ x ^ (-p) < y ^ (-p)
Module: Mathlib.Analysis.Complex.RemovableSingularity

Goal state before:
pp: E : Type u
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℂ E
inst✝ : CompleteSpace E
U : Set ℂ
hU : IsOpen U
c w₀ : ℂ
R : ℝ
f : ℂ → E
hc : closedBall c R ⊆ U
hf : DifferentiableOn ℂ f U
hw₀ : w₀ ∈ ball c R
hf' : DifferentiableOn ℂ (dslope f w₀) U
h0 : (2 * ↑π * I)⁻¹ • ∮ (z : ℂ) in C(c, R), (z - w₀)⁻¹ • dslope f w₀ z = dslope f w₀ w₀
h1 : ContinuousOn (fun z ↦ ((z - w₀) ^ 2)⁻¹) (sphere c R)
h2 : CircleIntegrable (fun z ↦ ((z - w₀) ^ 2)⁻¹ • f z) c R
h3 : CircleIntegrable (fun z ↦ ((z - w₀) ^ 2)⁻¹ • f w₀) c R
⊢ -2 ≠ -1

Tactic:
by decide

Goal state after:
Module: Mathlib.Analysis.Complex.LocallyUniformLimit

Goal state before:
pp: E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℂ E
z : ℂ
M r : ℝ
f : ℂ → E
hr : 0 < r
hf : ∀ w ∈ sphere z r, ‖f w‖ ≤ M
w : ℂ
hw : w ∈ sphere z r
⊢ 0 ≤ M

Tactic:
exact (norm_nonneg _).trans (hf w hw)

Goal state after:
Module: Mathlib.Geometry.Manifold.ChartedSpace

Goal state before:
pp: case inl
H : Type u
M : Type u_2
M' : Type u_3
inst✝² : TopologicalSpace H
inst✝¹ : TopologicalSpace M
inst✝ : TopologicalSpace M'
cm : ChartedSpace H M
cm' : ChartedSpace H M'
h : Nonempty H
e : OpenPartialHomeomorph (M ⊕ M') H
x : OpenPartialHomeomorph M H
hx : x ∈ ChartedSpace.atlas
hxe : (fun e ↦ e.lift_openEmbedding ⋯) x = e
⊢ (∃ f ∈ atlas H M, e = f.lift_openEmbedding ⋯) ∨ ∃ f' ∈ atlas H M', e = f'.lift_openEmbedding ⋯

Tactic:
← hxe

Goal state after:
case inl
H : Type u
M : Type u_2
M' : Type u_3
inst✝² : TopologicalSpace H
inst✝¹ : TopologicalSpace M
inst✝ : TopologicalSpace M'
cm : ChartedSpace H M
cm' : ChartedSpace H M'
h : Nonempty H
e : OpenPartialHomeomorph (M ⊕ M') H
x : OpenPartialHomeomorph M H
hx : x ∈ ChartedSpace.atlas
hxe : (fun e ↦ e.lift_openEmbedding ⋯) x = e
⊢ (∃ f ∈ atlas H M, (fun e ↦ e.lift_openEmbedding ⋯) x = f.lift_openEmbedding ⋯) ∨
    ∃ f' ∈ atlas H M', (fun e ↦ e.lift_openEmbedding ⋯) x = f'.lift_openEmbedding ⋯
Module: Mathlib.Geometry.Manifold.ChartedSpace

Goal state before:
pp: case inr
H : Type u
M : Type u_2
M' : Type u_3
inst✝² : TopologicalSpace H
inst✝¹ : TopologicalSpace M
inst✝ : TopologicalSpace M'
cm : ChartedSpace H M
cm' : ChartedSpace H M'
h : Nonempty H
e : OpenPartialHomeomorph (M ⊕ M') H
x : OpenPartialHomeomorph M' H
hx : x ∈ ChartedSpace.atlas
hxe : (fun e ↦ e.lift_openEmbedding ⋯) x = e
⊢ (∃ f ∈ atlas H M, e = f.lift_openEmbedding ⋯) ∨ ∃ f' ∈ atlas H M', e = f'.lift_openEmbedding ⋯

Tactic:
← hxe

Goal state after:
case inr
H : Type u
M : Type u_2
M' : Type u_3
inst✝² : TopologicalSpace H
inst✝¹ : TopologicalSpace M
inst✝ : TopologicalSpace M'
cm : ChartedSpace H M
cm' : ChartedSpace H M'
h : Nonempty H
e : OpenPartialHomeomorph (M ⊕ M') H
x : OpenPartialHomeomorph M' H
hx : x ∈ ChartedSpace.atlas
hxe : (fun e ↦ e.lift_openEmbedding ⋯) x = e
⊢ (∃ f ∈ atlas H M, (fun e ↦ e.lift_openEmbedding ⋯) x = f.lift_openEmbedding ⋯) ∨
    ∃ f' ∈ atlas H M', (fun e ↦ e.lift_openEmbedding ⋯) x = f'.lift_openEmbedding ⋯
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' : ∀ x ∈ s, HasFDerivWithinAt f (f' x) s x
ε : ℝ≥0
εpos : 0 < ε
δ : (E →L[ℝ] E) → ℝ≥0
hδ :
  ∀ (A : E →L[ℝ] E),
    0 < δ A ∧
      (∀ (B : E →L[ℝ] E), ‖B - A‖ ≤ ↑(δ A) → |B.det - A.det| ≤ ↑ε) ∧
        ∀ (t : Set E) (g : E → E), ApproximatesLinearOn g A t (δ A) → μ (g '' t) ≤ (ENNReal.ofReal |A.det| + ↑ε) * μ t
t : ℕ → Set E
A : ℕ → E →L[ℝ] E
t_disj : Pairwise (Disjoint on t)
t_meas : ∀ (n : ℕ), MeasurableSet (t n)
t_cover : s ⊆ ⋃ n, t n
ht : ∀ (n : ℕ), ApproximatesLinearOn f (A n) (s ∩ t n) (δ (A n))
⊢ μ (f '' s) ≤ μ (⋃ n, f '' (s ∩ t n))

Tactic:
apply measure_mono
      rw [← image_iUnion, ← inter_iUnion]
      exact Set.image_mono (subset_inter Subset.rfl t_cover)

Goal state after:
Module: Mathlib.Geometry.Manifold.StructureGroupoid

Goal state before:
pp: case left
H : Type u_1
inst✝ : TopologicalSpace H
PG : Pregroupoid H
e e' : OpenPartialHomeomorph H H
he : e ∈ {e | PG.property (↑e) e.source ∧ PG.property (↑e.symm) e.target}
he' : e' ∈ {e | PG.property (↑e) e.source ∧ PG.property (↑e.symm) e.target}
⊢ PG.property (↑(e ≫ₕ e')) (e ≫ₕ e').source

Tactic:
apply PG.comp he.1 he'.1 e.open_source e'.open_source
      apply e.continuousOn_toFun.isOpen_inter_preimage e.open_source e'.open_source

Goal state after:
Module: Mathlib.Geometry.Manifold.StructureGroupoid

Goal state before:
pp: case mpr
H : Type u_1
inst✝ : TopologicalSpace H
G : StructureGroupoid H
⊢ idRestrGroupoid ≤ G → ClosedUnderRestriction G

Tactic:
intro h

Goal state after:
case mpr
H : Type u_1
inst✝ : TopologicalSpace H
G : StructureGroupoid H
h : idRestrGroupoid ≤ G
⊢ ClosedUnderRestriction G
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

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
φ : PartialEquiv H E
hsource : φ.source = univ
htarget : φ.target = univ
hcont : Continuous[inst✝, PseudoMetricSpace.toUniformSpace.toTopologicalSpace] ↑φ
hcont_inv : Continuous[PseudoMetricSpace.toUniformSpace.toTopologicalSpace, inst✝] ↑φ.symm
this : range ↑φ = φ.target
⊢ ∀ (h : IsRCLikeNormedField 𝕜), Convex ℝ univ

Tactic:
intro h

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
φ : PartialEquiv H E
hsource : φ.source = univ
htarget : φ.target = univ
hcont : Continuous[inst✝, PseudoMetricSpace.toUniformSpace.toTopologicalSpace] ↑φ
hcont_inv : Continuous[PseudoMetricSpace.toUniformSpace.toTopologicalSpace, inst✝] ↑φ.symm
this : range ↑φ = φ.target
h : IsRCLikeNormedField 𝕜
⊢ Convex ℝ univ
Module: Mathlib.Geometry.Manifold.LocalInvariantProperties

Goal state before:
pp: case mp
H : Type u_1
H' : Type u_3
inst✝¹ : TopologicalSpace H
inst✝ : TopologicalSpace H'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
hG : G.LocalInvariantProp G' P
s : Set H
x : H
f : H → H'
e' : OpenPartialHomeomorph H' H'
he' : e' ∈ G'
hfs : ContinuousWithinAt f s x
hxe' : f x ∈ e'.source
h2f : f ⁻¹' e'.source ∈ 𝓝[s] x
h3f : ↑e' ∘ f ⁻¹' e'.symm.source ∈ 𝓝[s] x
⊢ P (↑e' ∘ f) s x → P f s x

Tactic:
intro h

Goal state after:
case mp
H : Type u_1
H' : Type u_3
inst✝¹ : TopologicalSpace H
inst✝ : TopologicalSpace H'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
hG : G.LocalInvariantProp G' P
s : Set H
x : H
f : H → H'
e' : OpenPartialHomeomorph H' H'
he' : e' ∈ G'
hfs : ContinuousWithinAt f s x
hxe' : f x ∈ e'.source
h2f : f ⁻¹' e'.source ∈ 𝓝[s] x
h3f : ↑e' ∘ f ⁻¹' e'.symm.source ∈ 𝓝[s] x
h : P (↑e' ∘ f) s x
⊢ P f s x
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
f : OpenPartialHomeomorph M H
I : ModelWithCorners 𝕜 E H
x : M
hx : x ∈ f.source
⊢ ↑I '' f.target ∈ 𝓝[range ↑I] ↑(f.extend I) x

Tactic:
← f.map_extend_nhds hx,

Goal state after:
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
f : OpenPartialHomeomorph M H
I : ModelWithCorners 𝕜 E H
x : M
hx : x ∈ f.source
⊢ ↑I '' f.target ∈ map (↑(f.extend I)) (𝓝 x)
Module: Mathlib.Geometry.Manifold.LocalInvariantProperties

Goal state before:
pp: case refine_1
H : Type u_1
H' : Type u_3
inst✝¹ : TopologicalSpace H
inst✝ : TopologicalSpace H'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
hG : G.LocalInvariantProp G' P
s : Set H
x : H
f : H → H'
e : OpenPartialHomeomorph H H
he : e ∈ G
hxe : x ∈ e.source
h : P (f ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x)
this : P ((f ∘ ↑e.symm) ∘ ↑e) (↑e ⁻¹' ↑e.symm ⁻¹' s) x
⊢ (f ∘ ↑e.symm) ∘ ↑e =ᶠ[𝓝 x] f

Tactic:
refine eventually_of_mem (e.open_source.mem_nhds hxe) fun x' hx' ↦ ?_
    simp_rw [Function.comp_apply, e.left_inv hx']

Goal state after:
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
f : OpenPartialHomeomorph M H
I : ModelWithCorners 𝕜 E H
s : Set M
y : M
hy : y ∈ f.source
hs : s ⊆ f.source
⊢ map (↑(f.extend I)) (𝓝[s] y) = 𝓝[↑(f.extend I) '' s] ↑(f.extend I) y

Tactic:
map_extend_nhdsWithin_eq_image _ hy,

Goal state after:
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
f : OpenPartialHomeomorph M H
I : ModelWithCorners 𝕜 E H
s : Set M
y : M
hy : y ∈ f.source
hs : s ⊆ f.source
⊢ 𝓝[↑(f.extend I) '' ((f.extend I).source ∩ s)] ↑(f.extend I) y = 𝓝[↑(f.extend I) '' s] ↑(f.extend I) y
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: case refine_1
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
⊢ s ⊆ I.source

pp: case refine_2
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
⊢ I.target ∩ ↑I.symm ⁻¹' s = ↑I.symm ⁻¹' s ∩ range ↑I

Tactic:
· rw [I.source_eq]; exact subset_univ _

Goal state after:
case refine_2
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
⊢ I.target ∩ ↑I.symm ⁻¹' s = ↑I.symm ⁻¹' s ∩ range ↑I
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'
e : OpenPartialHomeomorph M H
f : OpenPartialHomeomorph M' H'
P : (H → H') → Set H → H → Prop
g : M → M'
s : Set M
x : M
hG : G.LocalInvariantProp G' P
he : e ∈ maximalAtlas M G
xe : x ∈ e.source
hf : f ∈ maximalAtlas M' G'
xf : g x ∈ f.source
⊢ ContinuousWithinAt g s x ∧ P (↑f ∘ g ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x) →
    ContinuousWithinAt (↑f ∘ g ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x)

Tactic:
intro h

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'
e : OpenPartialHomeomorph M H
f : OpenPartialHomeomorph M' H'
P : (H → H') → Set H → H → Prop
g : M → M'
s : Set M
x : M
hG : G.LocalInvariantProp G' P
he : e ∈ maximalAtlas M G
xe : x ∈ e.source
hf : f ∈ maximalAtlas M' G'
xf : g x ∈ f.source
h : ContinuousWithinAt g s x ∧ P (↑f ∘ g ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x)
⊢ ContinuousWithinAt (↑f ∘ g ∘ ↑e.symm) (↑e.symm ⁻¹' s) (↑e x)
Module: Mathlib.Geometry.Manifold.IsManifold.Basic

Goal state before:
pp: m n : ℕ∞ω
𝕜 : Type u_1
inst✝⁴ : NontriviallyNormedField 𝕜
E : Type u_2
inst✝³ : NormedAddCommGroup E
inst✝² : NormedSpace 𝕜 E
H✝ : Type u_3
inst✝¹ : TopologicalSpace H✝
I : ModelWithCorners 𝕜 E H✝
M : Type u_4
inst✝ : TopologicalSpace M
f : H✝ → H✝
u : Set H✝
x✝ : IsOpen[inst✝¹] u
H : ∀ x ∈ u, ∃ v, IsOpen[inst✝¹] v ∧ x ∈ v ∧ ContDiffOn 𝕜 n (↑I ∘ f ∘ ↑I.symm) (↑I.symm ⁻¹' (u ∩ v) ∩ range ↑I)
y : E
hy2 : y ∈ range ↑I
x : H✝
hx : ↑I x = y
hy1 : x ∈ u
v : Set H✝
v_open : IsOpen[inst✝¹] v
xv : x ∈ v
hv : ContDiffOn 𝕜 n (↑I ∘ f ∘ ↑I.symm) (↑I.symm ⁻¹' u ∩ range ↑I ∩ ↑I.symm ⁻¹' v)
this : ↑I.symm ⁻¹' (u ∩ v) ∩ range ↑I = ↑I.symm ⁻¹' u ∩ range ↑I ∩ ↑I.symm ⁻¹' v
⊢ ∃ u_1,
    IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] u_1 ∧
      ↑I x ∈ u_1 ∧ ContDiffOn 𝕜 n (↑I ∘ f ∘ ↑I.symm) (↑I.symm ⁻¹' u ∩ range ↑I ∩ u_1)

Tactic:
exact ⟨I.symm ⁻¹' v, v_open.preimage I.continuous_symm, by simpa, hv⟩

Goal state after:
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'
⊢ e.prod e' ∈ maximalAtlas (I.prod I') n (M × M')

Tactic:
by
  simp only [mem_maximalAtlas_iff]
  rintro e'' ⟨f, hf, f', hf', rfl⟩
  rw [OpenPartialHomeomorph.prod_symm_trans_prod,
    OpenPartialHomeomorph.prod_symm_trans_prod]
  constructor <;>
    apply contDiffGroupoid_prod <;> grind [compatible_of_mem_maximalAtlas, subset_maximalAtlas]

Goal state after: