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

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'
N : Type u_7
inst✝² : TopologicalSpace N
inst✝¹ : ChartedSpace H' N
J : ModelWithCorners 𝕜 E' H'
inst✝ : BoundarylessManifold I M
⊢ univ.prod (ModelWithCorners.boundary N) ∪ (ModelWithCorners.boundary M).prod univ =
    univ.prod (ModelWithCorners.boundary N)

Tactic:
Boundaryless.boundary_eq_empty (I := I)

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'
N : Type u_7
inst✝² : TopologicalSpace N
inst✝¹ : ChartedSpace H' N
J : ModelWithCorners 𝕜 E' H'
inst✝ : BoundarylessManifold I M
⊢ univ.prod (ModelWithCorners.boundary N) ∪ ∅.prod univ = univ.prod (ModelWithCorners.boundary N)
Module: Mathlib.Geometry.Manifold.IsManifold.InteriorBoundary

Goal state before:
pp: 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
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'
p : M ⊕ M'
hp : I.IsInteriorPoint p
hright : p.isRight = true
⊢ I.IsInteriorPoint (p.getRight hright)

Tactic:
by
  grind [isInteriorPoint_iff_not_isBoundaryPoint, boundaryPoint_inr]

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

Goal state before:
pp: 𝕜 : Type u_1
B : Type u_2
F : Type u_4
M : Type u_5
E : B → Type u_6
inst✝¹⁵ : NontriviallyNormedField 𝕜
inst✝¹⁴ : NormedAddCommGroup F
inst✝¹³ : NormedSpace 𝕜 F
inst✝¹² : TopologicalSpace (TotalSpace F E)
inst✝¹¹ : (x : B) → TopologicalSpace (E x)
EB : Type u_7
inst✝¹⁰ : NormedAddCommGroup EB
inst✝⁹ : NormedSpace 𝕜 EB
HB : Type u_8
inst✝⁸ : TopologicalSpace HB
IB : ModelWithCorners 𝕜 EB HB
EM : Type u_10
inst✝⁷ : NormedAddCommGroup EM
inst✝⁶ : NormedSpace 𝕜 EM
HM : Type u_11
inst✝⁵ : TopologicalSpace HM
IM : ModelWithCorners 𝕜 EM HM
inst✝⁴ : TopologicalSpace M
inst✝³ : ChartedSpace HM M
inst✝² : TopologicalSpace B
inst✝¹ : ChartedSpace HB B
inst✝ : FiberBundle F E
f : M → TotalSpace F E
s : Set M
x₀ : M
⊢ ContinuousWithinAt f s x₀ ∧ MDiffAt[s] (↑(extChartAt (IB.prod 𝓘(𝕜, F)) (f x₀)) ∘ f) x₀ ↔
    (ContinuousWithinAt (fun x ↦ (f x).proj) s x₀ ∧ MDiffAt[s] (↑(extChartAt IB (f x₀).proj) ∘ fun x ↦ (f x).proj) x₀) ∧
      ContinuousWithinAt (fun x ↦ (↑(trivializationAt F E (f x₀).proj) (f x)).2) s x₀ ∧
        MDiffAt[s]
            (↑(extChartAt 𝓘(𝕜, F) (↑(trivializationAt F E (f x₀).proj) (f x₀)).2) ∘ fun x ↦
              (↑(trivializationAt F E (f x₀).proj) (f x)).2)
          x₀

Tactic:
rw [and_and_and_comm, ← FiberBundle.continuousWithinAt_totalSpace, and_congr_right_iff]

Goal state after:
𝕜 : Type u_1
B : Type u_2
F : Type u_4
M : Type u_5
E : B → Type u_6
inst✝¹⁵ : NontriviallyNormedField 𝕜
inst✝¹⁴ : NormedAddCommGroup F
inst✝¹³ : NormedSpace 𝕜 F
inst✝¹² : TopologicalSpace (TotalSpace F E)
inst✝¹¹ : (x : B) → TopologicalSpace (E x)
EB : Type u_7
inst✝¹⁰ : NormedAddCommGroup EB
inst✝⁹ : NormedSpace 𝕜 EB
HB : Type u_8
inst✝⁸ : TopologicalSpace HB
IB : ModelWithCorners 𝕜 EB HB
EM : Type u_10
inst✝⁷ : NormedAddCommGroup EM
inst✝⁶ : NormedSpace 𝕜 EM
HM : Type u_11
inst✝⁵ : TopologicalSpace HM
IM : ModelWithCorners 𝕜 EM HM
inst✝⁴ : TopologicalSpace M
inst✝³ : ChartedSpace HM M
inst✝² : TopologicalSpace B
inst✝¹ : ChartedSpace HB B
inst✝ : FiberBundle F E
f : M → TotalSpace F E
s : Set M
x₀ : M
⊢ ContinuousWithinAt f s x₀ →
    (MDiffAt[s] (↑(extChartAt (IB.prod 𝓘(𝕜, F)) (f x₀)) ∘ f) x₀ ↔
      MDiffAt[s] (↑(extChartAt IB (f x₀).proj) ∘ fun x ↦ (f x).proj) x₀ ∧
        MDiffAt[s]
            (↑(extChartAt 𝓘(𝕜, F) (↑(trivializationAt F E (f x₀).proj) (f x₀)).2) ∘ fun x ↦
              (↑(trivializationAt F E (f x₀).proj) (f x)).2)
          x₀)
Module: Mathlib.Geometry.Manifold.VectorBundle.MDifferentiable

Goal state before:
pp: 𝕜 : Type u_1
B : Type u_2
F : Type u_4
E : B → Type u_6
inst✝¹³ : TopologicalSpace B
inst✝¹² : TopologicalSpace (TotalSpace F E)
inst✝¹¹ : (x : B) → TopologicalSpace (E x)
inst✝¹⁰ : NormedAddCommGroup F
inst✝⁹ : NontriviallyNormedField 𝕜
inst✝⁸ : NormedSpace 𝕜 F
inst✝⁷ : FiberBundle F E
inst✝⁶ : (x : B) → AddCommGroup (E x)
inst✝⁵ : (x : B) → Module 𝕜 (E x)
inst✝⁴ : VectorBundle 𝕜 F E
HB : Type u_7
inst✝³ : TopologicalSpace HB
inst✝² : ChartedSpace HB B
EB : Type u_8
inst✝¹ : NormedAddCommGroup EB
inst✝ : NormedSpace 𝕜 EB
I : ModelWithCorners 𝕜 EB HB
u : Set B
x₀ : B
ι : Type u_9
t : ι → (x : B) → E x
ht : LocallyFinite fun i ↦ {x | t i x ≠ 0}
ht' : ∀ (i : ι), MDiffAt[u] (T% t) x₀
u' : Set B
hu' : u' ∈ 𝓝 x₀
hfin : {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}.Finite
s : Set ι := {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}
this✝ : Fintype ↑{i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}
this : (MDiffAt[u ∩ u'] fun x ↦ ⟨x, ∑ i ∈ s.toFinset, t i x⟩) x₀
y : B
hy : y ∈ u'
⊢ ⟨y, ∑' (i : ι), t i y⟩ = ⟨y, ∑ i ∈ s.toFinset, t i y⟩

Tactic:
rw [TotalSpace.mk_inj, tsum_eq_sum']

Goal state after:
𝕜 : Type u_1
B : Type u_2
F : Type u_4
E : B → Type u_6
inst✝¹³ : TopologicalSpace B
inst✝¹² : TopologicalSpace (TotalSpace F E)
inst✝¹¹ : (x : B) → TopologicalSpace (E x)
inst✝¹⁰ : NormedAddCommGroup F
inst✝⁹ : NontriviallyNormedField 𝕜
inst✝⁸ : NormedSpace 𝕜 F
inst✝⁷ : FiberBundle F E
inst✝⁶ : (x : B) → AddCommGroup (E x)
inst✝⁵ : (x : B) → Module 𝕜 (E x)
inst✝⁴ : VectorBundle 𝕜 F E
HB : Type u_7
inst✝³ : TopologicalSpace HB
inst✝² : ChartedSpace HB B
EB : Type u_8
inst✝¹ : NormedAddCommGroup EB
inst✝ : NormedSpace 𝕜 EB
I : ModelWithCorners 𝕜 EB HB
u : Set B
x₀ : B
ι : Type u_9
t : ι → (x : B) → E x
ht : LocallyFinite fun i ↦ {x | t i x ≠ 0}
ht' : ∀ (i : ι), MDiffAt[u] (T% t) x₀
u' : Set B
hu' : u' ∈ 𝓝 x₀
hfin : {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}.Finite
s : Set ι := {i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}
this✝ : Fintype ↑{i | ((fun i ↦ {x | t i x ≠ 0}) i ∩ u').Nonempty}
this : (MDiffAt[u ∩ u'] fun x ↦ ⟨x, ∑ i ∈ s.toFinset, t i x⟩) x₀
y : B
hy : y ∈ u'
⊢ (support fun i ↦ t i y) ⊆ ↑s.toFinset
Module: Mathlib.Geometry.Manifold.ContMDiffMFDeriv

Goal state before:
pp: case e'_11
𝕜 : Type u_1
inst✝¹⁵ : NontriviallyNormedField 𝕜
m n : WithTop ℕ∞
E : Type u_2
inst✝¹⁴ : NormedAddCommGroup E
inst✝¹³ : NormedSpace 𝕜 E
H : Type u_3
inst✝¹² : TopologicalSpace H
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝¹¹ : TopologicalSpace M
inst✝¹⁰ : ChartedSpace H M
E' : Type u_5
inst✝⁹ : NormedAddCommGroup E'
inst✝⁸ : NormedSpace 𝕜 E'
H' : Type u_6
inst✝⁷ : TopologicalSpace H'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
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
Js : IsManifold J 1 N
Is : IsManifold I 1 M
I's : IsManifold I' 1 M'
x₀ : N
f : N → M → M'
g : N → M
t : Set N
u : Set M
hf : ContMDiffWithinAt (J.prod I) I' n (uncurry f) (t ×ˢ u) (x₀, g x₀)
hg : ContMDiffWithinAt J I m g t x₀
hx₀ : x₀ ∈ t
hu : MapsTo g t u
hmn : m + 1 ≤ n
h'u : UniqueMDiff[u]
t' : Set N := t ∩ g ⁻¹' (extChartAt I (g x₀)).source
ht't : t' ⊆ t
hx₀gx₀ : (x₀, g x₀) ∈ t ×ˢ u
h4f✝ : ContinuousWithinAt (fun x ↦ f x (g x)) t x₀
h4f : (fun x ↦ f x (g x)) ⁻¹' (extChartAt I' (f x₀ (g x₀))).source ∈ 𝓝[t] x₀
h3f : ∀ᶠ (x' : N × M) in 𝓝[t ×ˢ u] (x₀, g x₀), ContMDiffWithinAt (J.prod I) I' 1 (uncurry f) (t ×ˢ u) x'
h2f : ∀ᶠ (x₂ : N) in 𝓝[t] x₀, ContMDiffWithinAt I I' 1 (f x₂) u (g x₂)
h2g : g ⁻¹' (extChartAt I (g x₀)).source ∈ 𝓝[t] x₀
hg' :
  ContinuousWithinAt g t' x₀ ∧
    ContDiffWithinAt 𝕜 m (↑(extChartAt I (g x₀)) ∘ g ∘ ↑(extChartAt J x₀).symm)
      (↑(extChartAt J x₀).symm ⁻¹' t' ∩ range ↑J) (↑(extChartAt J x₀) x₀)
hf' :
  ContinuousWithinAt (uncurry f) (t' ×ˢ u) (x₀, g x₀) ∧
    ContDiffWithinAt 𝕜 n
      (fun x ↦ ↑(extChartAt I' (f x₀ (g x₀))) (f (↑(extChartAt J x₀).symm x.1) (↑(extChartAt I (g x₀)).symm x.2)))
      ((fun p ↦ (↑(extChartAt J x₀).symm p.1, ↑(extChartAt I (g x₀)).symm p.2)) ⁻¹' t' ×ˢ u ∩ range ↑J ×ˢ range ↑I)
      (↑((extChartAt J x₀).prod (extChartAt I (g x₀))) (x₀, g x₀))
this :
  (fun p ↦ (↑(extChartAt J x₀).symm p.1, ↑(extChartAt I (g x₀)).symm p.2)) ⁻¹' t' ×ˢ u ∩
      range ↑J ×ˢ (extChartAt I (g x₀)).target ⊆
    (fun p ↦ (↑(extChartAt J x₀).symm p.1, ↑(extChartAt I (g x₀)).symm p.2)) ⁻¹' t' ×ˢ u ∩ range ↑J ×ˢ range ↑I
⊢ (↑(extChartAt J x₀).symm ⁻¹' t' ∩ range ↑J) ×ˢ ((extChartAt I (g x₀)).target ∩ ↑(extChartAt I (g x₀)).symm ⁻¹' u) =
    (fun p ↦ (↑(extChartAt J x₀).symm p.1, ↑(extChartAt I (g x₀)).symm p.2)) ⁻¹' t' ×ˢ u ∩
      range ↑J ×ˢ (extChartAt I (g x₀)).target

Tactic:
ext y; simp; tauto

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorField.LieBracket

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
H : Type u_2
inst✝⁵ : TopologicalSpace H
E : Type u_3
inst✝⁴ : NormedAddCommGroup E
inst✝³ : NormedSpace 𝕜 E
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
x : M
inst✝ : IsManifold I 2 M
Y : TangentSpace I x
⊢ ((mfderiv% ↑(extChartAt I x) x).inverse ∘SL (mfderiv[range ↑I] ↑(extChartAt I x).symm (↑(extChartAt I x) x)).inverse)
      Y =
    Y

Tactic:
set φ := extChartAt I x

Goal state after:
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
H : Type u_2
inst✝⁵ : TopologicalSpace H
E : Type u_3
inst✝⁴ : NormedAddCommGroup E
inst✝³ : NormedSpace 𝕜 E
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
x : M
inst✝ : IsManifold I 2 M
Y : TangentSpace I x
φ : PartialEquiv M E := extChartAt I x
⊢ ((mfderiv% ↑φ x).inverse ∘SL (mfderiv[range ↑I] ↑φ.symm (↑φ x)).inverse) Y = Y
Module: Mathlib.Geometry.Manifold.VectorField.Pullback

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
H : Type u_2
inst✝¹² : TopologicalSpace H
E : Type u_3
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
H' : Type u_5
inst✝⁷ : TopologicalSpace H'
E' : Type u_6
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝⁴ : TopologicalSpace M'
inst✝³ : ChartedSpace H' M'
f : M → M'
s : Set M
x₀ : M
V : (x : M') → TangentSpace I' x
m n : ℕ∞ω
t : Set M'
inst✝² : CompleteSpace E
inst✝¹ : IsManifold I 1 M
inst✝ : IsManifold I' 1 M'
hV : ContMDiffWithinAt I' I'.tangent m (fun x ↦ ⟨x, V x⟩) t (f x₀)
hf : ContMDiffWithinAt I I' n f s x₀
hf' : (mfderiv[s] f x₀).IsInvertible
hx₀ : x₀ ∈ s
hs : UniqueMDiff[s]
hmn : m + 1 ≤ n
hst : f ⁻¹' t ∈ 𝓝[s] x₀
⊢ s ∩ f ⁻¹' t ∈ 𝓝[s] x₀

Tactic:
exact Filter.inter_mem self_mem_nhdsWithin hst

Goal state after:
Module: Mathlib.Geometry.Manifold.VectorField.Pullback

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹³ : NontriviallyNormedField 𝕜
H : Type u_2
inst✝¹² : TopologicalSpace H
E : Type u_3
inst✝¹¹ : NormedAddCommGroup E
inst✝¹⁰ : NormedSpace 𝕜 E
I : ModelWithCorners 𝕜 E H
M : Type u_4
inst✝⁹ : TopologicalSpace M
inst✝⁸ : ChartedSpace H M
H' : Type u_5
inst✝⁷ : TopologicalSpace H'
E' : Type u_6
inst✝⁶ : NormedAddCommGroup E'
inst✝⁵ : NormedSpace 𝕜 E'
I' : ModelWithCorners 𝕜 E' H'
M' : Type u_7
inst✝⁴ : TopologicalSpace M'
inst✝³ : ChartedSpace H' M'
f : M → M'
s : Set M
x₀ : M
V : (x : M') → TangentSpace I' x
m n : ℕ∞ω
t : Set M'
y₀ : M'
inst✝² : CompleteSpace E
inst✝¹ : IsManifold I 1 M
inst✝ : IsManifold I' 1 M'
hV : ContMDiffWithinAt I' I'.tangent m (fun x ↦ ⟨x, V x⟩) t y₀
hf : ContMDiffAt I I' n f x₀
hf' : (mfderiv% f x₀).IsInvertible
hmn : m + 1 ≤ n
hst : f ⁻¹' t ∈ 𝓝[s] x₀
hy₀ : y₀ = f x₀
⊢ ContMDiffWithinAt I I.tangent m (fun x ↦ ⟨x, mpullback I I' f V x⟩) s x₀

Tactic:
by
  subst hy₀
  exact ContMDiffWithinAt.mpullback_vectorField_of_mem_nhdsWithin hV hf hf' hmn hst

Goal state after:
Module: Mathlib.Geometry.Manifold.Instances.Real

Goal state before:
pp: x✝ y✝ : ℝ
hxy : Fact (x✝ < y✝)
x y : ℝ
h : Fact (x < y)
z : ↑(Icc x y)
⊢ (if ↑z < y then IccLeftChart x y else IccRightChart x y) ∈ {IccLeftChart x y, IccRightChart x y}

Tactic:
by_cases h' : (z : ℝ) < y <;> simp [h']

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

Goal state before:
pp: E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
H : Type u_2
inst✝³ : TopologicalSpace H
I : ModelWithCorners ℝ E H
M : Type u_3
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
γ : ℝ → M
v : (x : M) → TangentSpace I x
t₀ : ℝ
inst✝ : IsManifold I 1 M
hγ : IsMIntegralCurveAt γ v t₀
t : ℝ
ht1 : γ ⁻¹' (extChartAt I (γ t₀)).source ∈ 𝓝 t
ht2 : HasMFDerivAt% γ t (ContinuousLinearMap.smulRight 1 (v (γ t)))
hsrc : γ t ∈ (chartAt H (γ t₀)).source
⊢ HasFDerivAt (↑(extChartAt I (γ t₀)) ∘ γ)
    (ContinuousLinearMap.toSpanSingleton ℝ ((tangentCoordChange I (γ t) (γ t₀) (γ t)) (v (γ t)))) t

Tactic:
← hasMFDerivAt_iff_hasFDerivAt

Goal state after:
E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
H : Type u_2
inst✝³ : TopologicalSpace H
I : ModelWithCorners ℝ E H
M : Type u_3
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
γ : ℝ → M
v : (x : M) → TangentSpace I x
t₀ : ℝ
inst✝ : IsManifold I 1 M
hγ : IsMIntegralCurveAt γ v t₀
t : ℝ
ht1 : γ ⁻¹' (extChartAt I (γ t₀)).source ∈ 𝓝 t
ht2 : HasMFDerivAt% γ t (ContinuousLinearMap.smulRight 1 (v (γ t)))
hsrc : γ t ∈ (chartAt H (γ t₀)).source
⊢ HasMFDerivAt% (↑(extChartAt I (γ t₀)) ∘ γ) t
    (ContinuousLinearMap.toSpanSingleton ℝ ((tangentCoordChange I (γ t) (γ t₀) (γ t)) (v (γ t))))
Module: Mathlib.Geometry.Manifold.IntegralCurve.Basic

Goal state before:
pp: E : Type u_1
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace ℝ E
H : Type u_2
inst✝³ : TopologicalSpace H
I : ModelWithCorners ℝ E H
M : Type u_3
inst✝² : TopologicalSpace M
inst✝¹ : ChartedSpace H M
γ : ℝ → M
v : (x : M) → TangentSpace I x
t₀ : ℝ
inst✝ : IsManifold I 1 M
hγ : IsMIntegralCurveAt γ v t₀
⊢ ∀ᶠ (t : ℝ) in 𝓝 t₀, HasDerivAt (↑(extChartAt I (γ t₀)) ∘ γ) ((tangentCoordChange I (γ t) (γ t₀) (γ t)) (v (γ t))) t

Tactic:
by
  apply eventually_mem_nhds_iff.mpr
    (hγ.continuousAt.preimage_mem_nhds (extChartAt_source_mem_nhds (I := I) _)) |>.and hγ |>.mono
  rintro t ⟨ht1, ht2⟩
  have hsrc := mem_of_mem_nhds ht1
  rw [mem_preimage, extChartAt_source I (γ t₀)] at hsrc
  rw [hasDerivAt_iff_hasFDerivAt, ← hasMFDerivAt_iff_hasFDerivAt]
  apply (HasMFDerivAt.comp t (hasMFDerivAt_extChartAt (I := I) hsrc) ht2).congr_mfderiv
  rw [ContinuousLinearMap.ext_iff]
  intro a
  rw [ContinuousLinearMap.comp_apply, ContinuousLinearMap.smulRight_apply, map_smul,
    ← one_apply_eq_self (F := TangentSpace 𝓘(ℝ, ℝ) t →L[ℝ] TangentSpace 𝓘(ℝ, ℝ) t) a,
    ← ContinuousLinearMap.smulRight_apply,
    mfderiv_chartAt_eq_tangentCoordChange hsrc]
  rfl

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

Goal state before:
pp: case hf₂
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
Is : IsManifold I 1 M
x : M
v : TangentSpace I x
N : ↑I.symm ⁻¹' (chartAt H x).target ∈ 𝓝 (↑I (↑(chartAt H x) x))
A : (MDiffAt fun x ↦ ⟨x, 0⟩) x
⊢ DifferentiableAt 𝕜 (fun x' ↦ 0) (↑I (↑(chartAt H x) x))

Tactic:
exact differentiableAt_const _

Goal state after:
Module: Mathlib.Geometry.Manifold.IntegralCurve.UniformTime

Goal state before:
pp: E : Type u_1
inst✝⁷ : NormedAddCommGroup E
inst✝⁶ : NormedSpace ℝ E
H : Type u_2
inst✝⁵ : TopologicalSpace H
I : ModelWithCorners ℝ E H
M : Type u_3
inst✝⁴ : TopologicalSpace M
inst✝³ : ChartedSpace H M
inst✝² : IsManifold I 1 M
inst✝¹ : T2Space M
γ γ' : ℝ → M
v : (x : M) → TangentSpace I x
inst✝ : BoundarylessManifold I M
hv : ContMDiff I I.tangent 1 fun x ↦ ⟨x, v x⟩
a b a' b' : ℝ
hγ : IsMIntegralCurveOn γ v (Ioo a b)
hγ' : IsMIntegralCurveOn γ' v (Ioo a' b')
t₀ : ℝ
ht₀ : t₀ ∈ Ioo a b ∩ Ioo a' b'
h : γ t₀ = γ' t₀
t : ℝ
ht : t ∈ Ioo a b ∪ Ioo a' b'
hmem : t ∈ Ioo a b
⊢ (Ioo a b).piecewise γ γ' t = γ t

Tactic:
by rw [piecewise, if_pos hmem]

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

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
n : WithTop ℕ∞
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'
inst✝¹ : IsManifold I 1 M
inst✝ : IsManifold I' 1 M'
a : TangentBundle I M
b : TangentBundle I' M'
U : ∀ (w : H) (w' : H'), UniqueDiffWithinAt 𝕜 (range (Prod.map ↑I ↑I')) (↑I w, ↑I' w')
smooth_pM : ContMDiffAt (I.tangent.prod I'.tangent) I.tangent n Prod.fst (a, b)
p : TangentBundle I M × TangentBundle I' M'
hp : p.1.proj ∈ (chartAt H a.proj).source ∧ p.2.proj ∈ (chartAt H' b.proj).source
φ : E → E := fun x ↦ ↑I (↑(chartAt H a.proj) (↑(chartAt H p.1.proj).symm (↑I.symm x)))
D0 : DifferentiableWithinAt 𝕜 φ (range ↑I) (↑I (↑(chartAt H p.1.proj) p.1.proj))
D :
  ∀ (w : TangentBundle I' M'),
    DifferentiableWithinAt 𝕜 (φ ∘ Prod.fst) (range (Prod.map ↑I ↑I'))
      (↑I (↑(chartAt H p.1.proj) p.1.proj), ↑I' (↑(chartAt H' w.proj) w.proj))
φ' : E' → E' := fun x ↦ ↑I' (↑(chartAt H' b.proj) (↑(chartAt H' p.2.proj).symm (↑I'.symm x)))
D0' : DifferentiableWithinAt 𝕜 φ' (range ↑I') (↑I' (↑(chartAt H' p.2.proj) p.2.proj))
⊢ DifferentiableWithinAt 𝕜 φ' (range ↑I') (↑I (↑(chartAt H p.1.proj) p.1.proj), ↑I' (↑(chartAt H' p.2.proj) p.2.proj)).2

Tactic:
by exact D0'

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

Goal state before:
pp: 𝕜 : Type u_1
inst✝¹² : NontriviallyNormedField 𝕜
n : WithTop ℕ∞
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'
inst✝¹ : IsManifold I 1 M
inst✝ : IsManifold I' 1 M'
a : TangentBundle I M
b : TangentBundle I' M'
U : ∀ (w : H) (w' : H'), UniqueDiffWithinAt 𝕜 (range (Prod.map ↑I ↑I')) (↑I w, ↑I' w')
smooth_pM' : ContMDiffAt (I.tangent.prod I'.tangent) I'.tangent n Prod.snd (a, b)
p : TangentBundle I M × TangentBundle I' M'
hp : p.1.proj ∈ (chartAt H a.proj).source ∧ p.2.proj ∈ (chartAt H' b.proj).source
φ : E' → E' := fun x ↦ ↑I' (↑(chartAt H' b.proj) (↑(chartAt H' p.2.proj).symm (↑I'.symm x)))
D0 : DifferentiableWithinAt 𝕜 φ (range ↑I') (↑I' (↑(chartAt H' p.2.proj) p.2.proj))
D :
  ∀ (w : TangentBundle I M),
    DifferentiableWithinAt 𝕜 (φ ∘ Prod.snd) (range (Prod.map ↑I ↑I'))
      (↑I (↑(chartAt H w.proj) w.proj), ↑I' (↑(chartAt H' p.2.proj) p.2.proj))
φ' : E → E := fun x ↦ ↑I (↑(chartAt H a.proj) (↑(chartAt H p.1.proj).symm (↑I.symm x)))
D0' : DifferentiableWithinAt 𝕜 φ' (range ↑I) (↑I (↑(chartAt H p.1.proj) p.1.proj))
⊢ DifferentiableWithinAt 𝕜 φ' (range ↑I) (↑I (↑(chartAt H p.1.proj) p.1.proj), ↑I' (↑(chartAt H' p.2.proj) p.2.proj)).1

Tactic:
by exact D0'

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

Goal state before:
pp: H : Type u_1
inst✝⁵ : TopologicalSpace H
H' : Type u_2
inst✝⁴ : TopologicalSpace H'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
M : Type u
inst✝³ : TopologicalSpace M
inst✝² : ChartedSpace H M
M' : Type u
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
hG : G.LocalInvariantProp G' P
V : Opens ↑(TopCat.of M)
f : ↥V → M'
h : ∀ (x : ↥V), ∃ V_1, ∃ (_ : ↑x ∈ V_1), ∃ i, ChartedSpace.LiftProp P fun x ↦ f (i x)
x : ↥V
U : Opens ↑(TopCat.of M)
hxU : ↑x ∈ U
i : U ⟶ V
hU : ChartedSpace.LiftProp P (f ∘ ⇑i)
⊢ ChartedSpace.LiftPropAt P f x

Tactic:
let x' : U := ⟨x, hxU⟩

Goal state after:
H : Type u_1
inst✝⁵ : TopologicalSpace H
H' : Type u_2
inst✝⁴ : TopologicalSpace H'
G : StructureGroupoid H
G' : StructureGroupoid H'
P : (H → H') → Set H → H → Prop
M : Type u
inst✝³ : TopologicalSpace M
inst✝² : ChartedSpace H M
M' : Type u
inst✝¹ : TopologicalSpace M'
inst✝ : ChartedSpace H' M'
hG : G.LocalInvariantProp G' P
V : Opens ↑(TopCat.of M)
f : ↥V → M'
h : ∀ (x : ↥V), ∃ V_1, ∃ (_ : ↑x ∈ V_1), ∃ i, ChartedSpace.LiftProp P fun x ↦ f (i x)
x : ↥V
U : Opens ↑(TopCat.of M)
hxU : ↑x ∈ U
i : U ⟶ V
hU : ChartedSpace.LiftProp P (f ∘ ⇑i)
x' : ↥U := ⟨↑x, hxU⟩
⊢ ChartedSpace.LiftPropAt P f x
Module: Mathlib.Geometry.Manifold.Sheaf.LocallyRingedSpace

Goal state before:
pp: 𝕜 : Type u
inst✝⁵ : NontriviallyNormedField 𝕜
EM : Type u_1
inst✝⁴ : NormedAddCommGroup EM
inst✝³ : NormedSpace 𝕜 EM
HM : Type u_2
inst✝² : TopologicalSpace HM
IM : ModelWithCorners 𝕜 EM HM
M : Type u
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace HM M
x : M
S : TopCat.Presheaf CommRingCat (TopCat.of M) := (smoothSheafCommRing IM 𝓘(𝕜, 𝕜) M 𝕜).presheaf
U : Opens M
hxU : x ∈ U
f : C^∞⟮IM, ↥U; 𝓘(𝕜, 𝕜), 𝕜⟯
hf : (eval IM 𝓘(𝕜, 𝕜) M 𝕜 x) ((CategoryTheory.ConcreteCategory.hom (S.germ U x hxU)) f) ≠ 0
hf' : f ⟨x, hxU⟩ ≠ 0
V₀ : Set ↥U
hV₀f : ∀ y ∈ V₀, f y ≠ 0
hV₀ : IsOpen[instTopologicalSpaceSubtype] V₀
hxV₀ : ⟨x, hxU⟩ ∈ V₀
V : Opens M := { carrier := Subtype.val '' V₀, is_open' := ⋯ }
hUV : V ≤ U
⊢ V₀ = Set.range (Set.inclusion hUV)

Tactic:
convert! (Set.range_inclusion hUV).symm

Goal state after:
case e'_2
𝕜 : Type u
inst✝⁵ : NontriviallyNormedField 𝕜
EM : Type u_1
inst✝⁴ : NormedAddCommGroup EM
inst✝³ : NormedSpace 𝕜 EM
HM : Type u_2
inst✝² : TopologicalSpace HM
IM : ModelWithCorners 𝕜 EM HM
M : Type u
inst✝¹ : TopologicalSpace M
inst✝ : ChartedSpace HM M
x : M
S : TopCat.Presheaf CommRingCat (TopCat.of M) := ⋯
U : Opens M
hxU : x ∈ U
f : C^∞⟮IM, ↥U; 𝓘(𝕜, 𝕜), 𝕜⟯
hf : (eval IM 𝓘(𝕜, 𝕜) M 𝕜 x) ((CategoryTheory.ConcreteCategory.hom (S.germ U x hxU)) f) ≠ 0
hf' : f ⟨x, hxU⟩ ≠ 0
V₀ : Set ↥U
hV₀f : ∀ y ∈ V₀, f y ≠ 0
hV₀ : IsOpen[instTopologicalSpaceSubtype] V₀
hxV₀ : ⟨x, hxU⟩ ∈ V₀
V : Opens M := ⋯
hUV : V ≤ U
e_1✝ : Set ↥U = Set ↑↑U
⊢ V₀ = {x | ↑x ∈ ↑V}
Module: Mathlib.Geometry.Manifold.Sheaf.LocallyRingedSpace

Goal state before:
pp: 𝕜 : Type u
inst✝¹⁰ : NontriviallyNormedField 𝕜
EM : Type u_1
inst✝⁹ : NormedAddCommGroup EM
inst✝⁸ : NormedSpace 𝕜 EM
HM : Type u_2
inst✝⁷ : TopologicalSpace HM
IM : ModelWithCorners 𝕜 EM HM
M : Type u
inst✝⁶ : TopologicalSpace M
inst✝⁵ : ChartedSpace HM M
EN : Type u_3
inst✝⁴ : NormedAddCommGroup EN
inst✝³ : NormedSpace 𝕜 EN
HN : Type u_4
inst✝² : TopologicalSpace HN
IN : ModelWithCorners 𝕜 EN HN
N : Type u
inst✝¹ : TopologicalSpace N
inst✝ : ChartedSpace HN N
f : M → N
hf : ContMDiff IM IN ∞ f
x : M
⊢ PresheafedSpace.Hom.stalkMap (locallyRingedSpaceMapAux f hf) x ≫ smoothSheafCommRing.evalHom IM 𝓘(𝕜, 𝕜) M 𝕜 x =
    smoothSheafCommRing.evalHom IN 𝓘(𝕜, 𝕜) N 𝕜 (f x)

Tactic:
by
  apply TopCat.Presheaf.stalk_hom_ext
  intro U hxU
  rw [PresheafedSpace.stalkMap_germ_assoc]
  ext a
  refine Eq.trans ?_ (smoothSheafCommRing.evalHom_germ _ _ _ _ _ _ _ a).symm
  apply smoothSheafCommRing.evalHom_germ

Goal state after: