mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Analysis.SpecialFunctions.SmoothTransition

Goal state before:
pp: case inr.inr
p : ℝ[X]
x : ℝ
hx : 0 < x
⊢ HasDerivAt (fun x ↦ Polynomial.eval x⁻¹ p * expNegInvGlue x)
    (Polynomial.eval x⁻¹ (X ^ 2 * (p - derivative p)) * expNegInvGlue x) x

Tactic:
have := ((p.hasDerivAt x⁻¹).mul (hasDerivAt_neg _).exp).comp x (hasDerivAt_inv hx.ne')
    convert! this.congr_of_eventuallyEq _ using 1
    · simp [expNegInvGlue, hx.not_ge]
      ring
    · filter_upwards [lt_mem_nhds hx] with y hy
      simp [expNegInvGlue, hy.not_ge]

Goal state after:
Module: Mathlib.Analysis.SpecialFunctions.SmoothTransition

Goal state before:
pp: p : ℝ[X]
x : ℝ
⊢ HasDerivAt (fun x ↦ Polynomial.eval x⁻¹ p * expNegInvGlue x)
    (Polynomial.eval x⁻¹ (X ^ 2 * (p - derivative p)) * expNegInvGlue x) x

Tactic:
rcases lt_trichotomy x 0 with hx | rfl | hx
  · rw [zero_of_nonpos hx.le, mul_zero]
    refine (hasDerivAt_const _ 0).congr_of_eventuallyEq ?_
    filter_upwards [gt_mem_nhds hx] with y hy
    rw [zero_of_nonpos hy.le, mul_zero]
  · rw [expNegInvGlue.zero, mul_zero, hasDerivAt_iff_tendsto_slope]
    refine ((tendsto_polynomial_inv_mul_zero (p * X)).mono_left inf_le_left).congr fun x ↦ ?_
    simp [slope_def_field, div_eq_mul_inv, mul_right_comm]
  · have := ((p.hasDerivAt x⁻¹).mul (hasDerivAt_neg _).exp).comp x (hasDerivAt_inv hx.ne')
    convert! this.congr_of_eventuallyEq _ using 1
    · simp [expNegInvGlue, hx.not_ge]
      ring
    · filter_upwards [lt_mem_nhds hx] with y hy
      simp [expNegInvGlue, hy.not_ge]

Goal state after:
Module: Mathlib.Analysis.Convolution

Goal state before:
pp: 𝕜 : Type u𝕜
G : Type uG
E : Type uE
E' : Type uE'
F : Type uF
inst✝⁸ : NormedAddCommGroup E
inst✝⁷ : NormedAddCommGroup E'
inst✝⁶ : NormedAddCommGroup F
f : G → E
g : G → E'
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : NormedSpace 𝕜 E'
inst✝² : NormedSpace 𝕜 F
L : E →L[𝕜] E' →L[𝕜] F
inst✝¹ : AddGroup G
inst✝ : TopologicalSpace G
hcg : HasCompactSupport g
hg : Continuous[inst✝, PseudoMetricSpace.toUniformSpace.toTopologicalSpace] g
x t : G
s u : Set G
hx : x ∈ s
hu : -tsupport g + s ⊆ u
⊢ ‖(L (f t)) (g (x - t))‖ ≤ u.indicator (fun t ↦ ‖L‖ * ‖f t‖ * ⨆ i, ‖g i‖) t

Tactic:
refine convolution_integrand_bound_right_of_le_of_subset _ (fun i => ?_) hx hu

Goal state after:
𝕜 : Type u𝕜
G : Type uG
E : Type uE
E' : Type uE'
F : Type uF
inst✝⁸ : NormedAddCommGroup E
inst✝⁷ : NormedAddCommGroup E'
inst✝⁶ : NormedAddCommGroup F
f : G → E
g : G → E'
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : NormedSpace 𝕜 E'
inst✝² : NormedSpace 𝕜 F
L : E →L[𝕜] E' →L[𝕜] F
inst✝¹ : AddGroup G
inst✝ : TopologicalSpace G
hcg : HasCompactSupport g
hg : Continuous[inst✝, PseudoMetricSpace.toUniformSpace.toTopologicalSpace] g
x t : G
s u : Set G
hx : x ∈ s
hu : -tsupport g + s ⊆ u
i : G
⊢ ‖g i‖ ≤ ⨆ i, ‖g i‖
Module: Mathlib.Analysis.Convolution

Goal state before:
pp: 𝕜 : Type u𝕜
G : Type uG
E : Type uE
E' : Type uE'
F : Type uF
inst✝¹⁰ : NormedAddCommGroup E
inst✝⁹ : NormedAddCommGroup E'
inst✝⁸ : NormedAddCommGroup F
f : G → E
g : G → E'
inst✝⁷ : NontriviallyNormedField 𝕜
inst✝⁶ : NormedSpace 𝕜 E
inst✝⁵ : NormedSpace 𝕜 E'
inst✝⁴ : NormedSpace 𝕜 F
L : E →L[𝕜] E' →L[𝕜] F
inst✝³ : MeasurableSpace G
μ : Measure G
inst✝² : AddGroup G
inst✝¹ : MeasurableAdd G
inst✝ : MeasurableNeg G
x₀ : G
s : Set G
hbg : BddAbove ((fun i ↦ ‖g i‖) '' (fun t ↦ -t + x₀) ⁻¹' s)
hs : MeasurableSet s
h2s : (support fun t ↦ (L (f t)) (g (x₀ - t))) ⊆ s
hf : IntegrableOn f s μ
hmg : AEStronglyMeasurable g (Measure.map (fun t ↦ x₀ - t) (μ.restrict s))
⊢ ConvolutionExistsAt f g x₀ L μ

Tactic:
by
  rw [ConvolutionExistsAt]
  rw [← integrableOn_iff_integrable_of_support_subset h2s]
  set s' := (fun t => -t + x₀) ⁻¹' s
  have : ∀ᵐ t : G ∂μ.restrict s,
      ‖L (f t) (g (x₀ - t))‖ ≤ s.indicator (fun t => ‖L‖ * ‖f t‖ * ⨆ i : s', ‖g i‖) t := by
    filter_upwards
    refine le_indicator (fun t ht => ?_) fun t ht => ?_
    · apply_rules [L.le_of_opNorm₂_le_of_le, le_rfl]
      refine (le_ciSup_set hbg <| mem_preimage.mpr ?_)
      rwa [neg_sub, sub_add_cancel]
    · have : t ∉ support fun t => L (f t) (g (x₀ - t)) := mt (fun h => h2s h) ht
      rw [notMem_support.mp this, norm_zero]
  refine Integrable.mono' ?_ ?_ this
  · rw [integrable_indicator_iff hs]; exact ((hf.norm.const_mul _).mul_const _).integrableOn
  · exact hf.aestronglyMeasurable.convolution_integrand_snd' L hmg

Goal state after:
Module: Mathlib.Analysis.Convolution

Goal state before:
pp: case ha
G : Type uG
x : G
inst✝¹ : MeasurableSpace G
μ : Measure G
inst✝ : AddGroup G
f g g' : G → ℝ
hfg : ConvolutionExistsAt f g x (lsmul ℝ ℝ) μ
hfg' : ConvolutionExistsAt f g' x (lsmul ℝ ℝ) μ
hf : ∀ (x : G), 0 ≤ f x
hg : ∀ (x : G), g x ≤ g' x
t : G
⊢ 0 ≤ f t

pp: case hbc
G : Type uG
x : G
inst✝¹ : MeasurableSpace G
μ : Measure G
inst✝ : AddGroup G
f g g' : G → ℝ
hfg : ConvolutionExistsAt f g x (lsmul ℝ ℝ) μ
hfg' : ConvolutionExistsAt f g' x (lsmul ℝ ℝ) μ
hf : ∀ (x : G), 0 ≤ f x
hg : ∀ (x : G), g x ≤ g' x
t : G
⊢ g (x - t) ≤ g' (x - t)

Tactic:
exacts [hf _, hg _]

Goal state after:
Module: Mathlib.Analysis.Convolution

Goal state before:
pp: G : Type uG
E' : Type uE'
inst✝⁸ : NormedAddCommGroup E'
inst✝⁷ : MeasurableSpace G
μ : Measure G
inst✝⁶ : SeminormedAddCommGroup G
inst✝⁵ : BorelSpace G
inst✝⁴ : SecondCountableTopology G
inst✝³ : μ.IsAddLeftInvariant
inst✝² : SFinite μ
inst✝¹ : NormedSpace ℝ E'
inst✝ : CompleteSpace E'
ι : Type u_1
g : ι → G → E'
l : Filter ι
x₀ : G
z₀ : E'
φ : ι → G → ℝ
k : ι → G
hnφ : ∀ᶠ (i : ι) in l, ∀ (x : G), 0 ≤ φ i x
hiφ : ∀ᶠ (i : ι) in l, ∫ (x : G), φ i x ∂μ = 1
hmg : ∀ᶠ (i : ι) in l, AEStronglyMeasurable (g i) μ
hk : Tendsto k l (𝓝 x₀)
hφ : ∀ t ∈ 𝓝 0, ∀ᶠ (x : ι) in l, support (φ x) ⊆ t
hcg :
  ∀ ε > 0,
    ∃ pa,
      (∀ᶠ (i : ι) in l, pa i) ∧ ∃ ε_1 > 0, ∀ ⦃i : ι⦄, pa i → ∀ ⦃x : G⦄, dist x x₀ < ε_1 → dist (uncurry g (i, x)) z₀ < ε
ε : ℝ
hε : ε > 0
h2ε : 0 < ε / 3
p : ι → Prop
hp : ∀ᶠ (i : ι) in l, p i
δ : ℝ
hδ : δ > 0
hgδ : ∀ ⦃i : ι⦄, p i → ∀ ⦃x : G⦄, dist x x₀ < δ → dist (g i x) z₀ < ε / 3
h2k : ∀ᶠ (x : ι) in l, dist (k x) x₀ < δ / 2
h2φ : ∀ᶠ (x : ι) in l, support (φ x) ⊆ ball 0 (δ / 2)
i : ι
hpi : p i
hki : dist (k i) x₀ < δ / 2
hφi : support (φ i) ⊆ ball 0 (δ / 2)
hnφi : ∀ (x : G), 0 ≤ φ i x
hiφi : ∫ (x : G), φ i x ∂μ = 1
hmgi : AEStronglyMeasurable (g i) μ
hgi : dist (g i (k i)) z₀ < ε / 3
h1 : ∀ x' ∈ ball (k i) (δ / 2), dist (g i x') (g i (k i)) ≤ ε / 3 + ε / 3
this : dist ((φ i ⋆[lsmul ℝ ℝ, μ] g i) (k i)) (g i (k i)) ≤ ε / 3 + ε / 3
⊢ dist ((φ i ⋆[lsmul ℝ ℝ, μ] g i) (k i)) z₀ < ε

Tactic:
refine ((dist_triangle _ _ _).trans_lt (add_lt_add_of_le_of_lt this hgi)).trans_eq ?_

Goal state after:
G : Type uG
E' : Type uE'
inst✝⁸ : NormedAddCommGroup E'
inst✝⁷ : MeasurableSpace G
μ : Measure G
inst✝⁶ : SeminormedAddCommGroup G
inst✝⁵ : BorelSpace G
inst✝⁴ : SecondCountableTopology G
inst✝³ : μ.IsAddLeftInvariant
inst✝² : SFinite μ
inst✝¹ : NormedSpace ℝ E'
inst✝ : CompleteSpace E'
ι : Type u_1
g : ι → G → E'
l : Filter ι
x₀ : G
z₀ : E'
φ : ι → G → ℝ
k : ι → G
hnφ : ∀ᶠ (i : ι) in l, ∀ (x : G), 0 ≤ φ i x
hiφ : ∀ᶠ (i : ι) in l, ∫ (x : G), φ i x ∂μ = 1
hmg : ∀ᶠ (i : ι) in l, AEStronglyMeasurable (g i) μ
hk : Tendsto k l (𝓝 x₀)
hφ : ∀ t ∈ 𝓝 0, ∀ᶠ (x : ι) in l, support (φ x) ⊆ t
hcg :
  ∀ ε > 0,
    ∃ pa,
      (∀ᶠ (i : ι) in l, pa i) ∧ ∃ ε_1 > 0, ∀ ⦃i : ι⦄, pa i → ∀ ⦃x : G⦄, dist x x₀ < ε_1 → dist (uncurry g (i, x)) z₀ < ε
ε : ℝ
hε : ε > 0
h2ε : 0 < ε / 3
p : ι → Prop
hp : ∀ᶠ (i : ι) in l, p i
δ : ℝ
hδ : δ > 0
hgδ : ∀ ⦃i : ι⦄, p i → ∀ ⦃x : G⦄, dist x x₀ < δ → dist (g i x) z₀ < ε / 3
h2k : ∀ᶠ (x : ι) in l, dist (k x) x₀ < δ / 2
h2φ : ∀ᶠ (x : ι) in l, support (φ x) ⊆ ball 0 (δ / 2)
i : ι
hpi : p i
hki : dist (k i) x₀ < δ / 2
hφi : support (φ i) ⊆ ball 0 (δ / 2)
hnφi : ∀ (x : G), 0 ≤ φ i x
hiφi : ∫ (x : G), φ i x ∂μ = 1
hmgi : AEStronglyMeasurable (g i) μ
hgi : dist (g i (k i)) z₀ < ε / 3
h1 : ∀ x' ∈ ball (k i) (δ / 2), dist (g i x') (g i (k i)) ≤ ε / 3 + ε / 3
this : dist ((φ i ⋆[lsmul ℝ ℝ, μ] g i) (k i)) (g i (k i)) ≤ ε / 3 + ε / 3
⊢ ε / 3 + ε / 3 + ε / 3 = ε
Module: Mathlib.Analysis.Calculus.ContDiff.Convolution

Goal state before:
pp: 𝕜 : Type u𝕜
G : Type uG
E : Type uE
E' : Type uE'
F : Type uF
P : Type uP
inst✝¹³ : NormedAddCommGroup E
inst✝¹² : NormedAddCommGroup E'
inst✝¹¹ : NormedAddCommGroup F
f : G → E
inst✝¹⁰ : RCLike 𝕜
inst✝⁹ : NormedSpace 𝕜 E
inst✝⁸ : NormedSpace 𝕜 E'
inst✝⁷ : NormedSpace ℝ F
inst✝⁶ : NormedSpace 𝕜 F
inst✝⁵ : MeasurableSpace G
inst✝⁴ : NormedAddCommGroup G
inst✝³ : BorelSpace G
inst✝² : NormedSpace 𝕜 G
inst✝¹ : NormedAddCommGroup P
inst✝ : NormedSpace 𝕜 P
μ : Measure G
L : E →L[𝕜] E' →L[𝕜] F
g : P → G → E'
s : Set P
k : Set G
hs : IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] s
hk : IsCompact k
hgs : ∀ (p : P) (x : G), p ∈ s → x ∉ k → g p x = 0
hf : LocallyIntegrable f μ
hg : ContDiffOn 𝕜 1 (↿g) (s ×ˢ univ)
q₀ : P × G
hq₀ : q₀.1 ∈ s
g' : P × G → P × G →L[𝕜] E' := fderiv 𝕜 ↿g
A :
  ∀ p ∈ s,
    Continuous[PseudoMetricSpace.toUniformSpace.toTopologicalSpace, PseudoMetricSpace.toUniformSpace.toTopologicalSpace]
      (g p)
A' : ∀ (q : P × G), q.1 ∈ s → s ×ˢ univ ∈ 𝓝 q
g'_zero : ∀ (p : P) (x : G), p ∈ s → x ∉ k → g' (p, x) = 0
ε C : ℝ
εpos : 0 < ε
h₀ε : ball q₀.1 ε ⊆ s
hε : ∀ (p : P) (x : G), ‖p - q₀.1‖ < ε → ‖g' (p, x)‖ ≤ C
I1 : ∀ᶠ (x : P × G) in 𝓝 q₀, AEStronglyMeasurable (fun a ↦ (L (f a)) (g x.1 (x.2 - a))) μ
I2 : Integrable (fun a ↦ (L (f a)) (g q₀.1 (q₀.2 - a))) μ
I3 : AEStronglyMeasurable (fun a ↦ L (f a) ∘SL g' (q₀.1, q₀.2 - a)) μ
K' : Set G := -k + {q₀.2}
K'_def : K' = -k + {q₀.2}
hK' : IsCompact K'
U : Set G
U_open : IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] U
K'U : K' ⊆ U
hU : IntegrableOn f U μ
⊢ ∃ δ, 0 < δ ∧ δ ≤ ε ∧ K' + ball 0 δ ⊆ U

Tactic:
obtain ⟨V, V_mem, hV⟩ : ∃ V ∈ 𝓝 (0 : G), K' + V ⊆ U :=
      compact_open_separated_add_right hK' U_open K'U
    rcases Metric.mem_nhds_iff.1 V_mem with ⟨δ, δpos, hδ⟩
    refine ⟨min δ ε, lt_min δpos εpos, min_le_right δ ε, ?_⟩
    exact (add_subset_add_left ((ball_subset_ball (min_le_left _ _)).trans hδ)).trans hV

Goal state after:
Module: Mathlib.Analysis.Calculus.BumpFunction.FiniteDimension

Goal state before:
pp: case inr
E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
n : ℕ∞
s : Set E
hs : IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] s
h's : s.Nonempty
ι : Type (max 0 u_1) := { f // support f ⊆ s ∧ HasCompactSupport f ∧ ContDiff ℝ ∞ f ∧ range f ⊆ Icc 0 1 }
T : Set ι
T_count : T.Countable
hT✝ : ⋃ f ∈ T, support ↑f = s
hT : T.Nonempty
⊢ T.Nonempty

Tactic:
exact hT

Goal state after:
Module: Mathlib.Analysis.Calculus.BumpFunction.FiniteDimension

Goal state before:
pp: E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
A : IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (ball 0 1)
f : E → ℝ
f_support : support f = ball 0 1
f_smooth : ContDiff ℝ ∞ f
f_range : range f ⊆ Icc 0 1
B : ∀ (x : E), f x ∈ Icc 0 1
x : E
hx : x ∈ ball 0 1
⊢ f x ≠ 0

Tactic:
← f_support

Goal state after:
E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
A : IsOpen[PseudoMetricSpace.toUniformSpace.toTopologicalSpace] (ball 0 1)
f : E → ℝ
f_support : support f = ball 0 1
f_smooth : ContDiff ℝ ∞ f
f_range : range f ⊆ Icc 0 1
B : ∀ (x : E), f x ∈ Icc 0 1
x : E
hx : x ∈ support f
⊢ f x ≠ 0
Module: Mathlib.MeasureTheory.Covering.Besicovitch

Goal state before:
pp: case inr
α : Type u_1
inst✝¹ : MetricSpace α
β : Type u
inst✝ : Nonempty β
p : TauPackage β α
N : ℕ
hN : IsEmpty (SatelliteConfig α N p.τ)
i : Ordinal.{u}
IH : ∀ y < i, y < p.lastStep → p.color y < N
hi : i < p.lastStep
A✝ : Set ℕ :=
  ⋃ j,
    ⋃ (_ :
      (closedBall (p.c (p.index ↑j)) (p.r (p.index ↑j)) ∩ closedBall (p.c (p.index i)) (p.r (p.index i))).Nonempty),
      {p.color ↑j}
color_i : p.color i = sInf (univ \ A✝)
N_mem : N ∈ univ \ A✝
Inf_eq_N : sInf (univ \ A✝) = N
g : ℕ → Ordinal.{u}
hg :
  ∀ k < N,
    g k < i ∧
      (closedBall (p.c (p.index (g k))) (p.r (p.index (g k))) ∩
            closedBall (p.c (p.index i)) (p.r (p.index i))).Nonempty ∧
        k = p.color (g k)
G : ℕ → Ordinal.{u} := fun n ↦ if n = N then i else g n
color_G : ∀ n ≤ N, p.color (G n) = n
G_lt_last : ∀ n ≤ N, G n < p.lastStep
fGn : ∀ n ≤ N, p.c (p.index (G n)) ∉ p.iUnionUpTo (G n) ∧ p.R (G n) ≤ p.τ * p.r (p.index (G n))
Gab :
  ∀ (a b : Fin N.succ),
    G ↑a < G ↑b →
      p.r (p.index (G ↑a)) ≤ dist (p.c (p.index (G ↑a))) (p.c (p.index (G ↑b))) ∧
        p.r (p.index (G ↑b)) ≤ p.τ * p.r (p.index (G ↑a))
a b : Fin N.succ
a_ne_b : a ≠ b
G_le : G ↑a ≤ G ↑b
H : G ↑a = G ↑b
A : p.color (G ↑a) ≠ ↑b
⊢ G ↑a < G ↑b

Tactic:
← color_G b (Nat.lt_succ_iff.1 b.2),

Goal state after:
case inr
α : Type u_1
inst✝¹ : MetricSpace α
β : Type u
inst✝ : Nonempty β
p : TauPackage β α
N : ℕ
hN : IsEmpty (SatelliteConfig α N p.τ)
i : Ordinal.{u}
IH : ∀ y < i, y < p.lastStep → p.color y < N
hi : i < p.lastStep
A✝ : Set ℕ :=
  ⋃ j,
    ⋃ (_ :
      (closedBall (p.c (p.index ↑j)) (p.r (p.index ↑j)) ∩ closedBall (p.c (p.index i)) (p.r (p.index i))).Nonempty),
      {p.color ↑j}
color_i : p.color i = sInf (univ \ A✝)
N_mem : N ∈ univ \ A✝
Inf_eq_N : sInf (univ \ A✝) = N
g : ℕ → Ordinal.{u}
hg :
  ∀ k < N,
    g k < i ∧
      (closedBall (p.c (p.index (g k))) (p.r (p.index (g k))) ∩
            closedBall (p.c (p.index i)) (p.r (p.index i))).Nonempty ∧
        k = p.color (g k)
G : ℕ → Ordinal.{u} := fun n ↦ if n = N then i else g n
color_G : ∀ n ≤ N, p.color (G n) = n
G_lt_last : ∀ n ≤ N, G n < p.lastStep
fGn : ∀ n ≤ N, p.c (p.index (G n)) ∉ p.iUnionUpTo (G n) ∧ p.R (G n) ≤ p.τ * p.r (p.index (G n))
Gab :
  ∀ (a b : Fin N.succ),
    G ↑a < G ↑b →
      p.r (p.index (G ↑a)) ≤ dist (p.c (p.index (G ↑a))) (p.c (p.index (G ↑b))) ∧
        p.r (p.index (G ↑b)) ≤ p.τ * p.r (p.index (G ↑a))
a b : Fin N.succ
a_ne_b : a ≠ b
G_le : G ↑a ≤ G ↑b
H : G ↑a = G ↑b
A : p.color (G ↑a) ≠ p.color (G ↑b)
⊢ G ↑a < G ↑b
Module: Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace

Goal state before:
pp: case inl
E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
h :
  ∀ (δ : ℝ),
    0 < δ → δ < 1 → ∃ s, (∀ c ∈ s, ‖c‖ ≤ 2) ∧ (∀ c ∈ s, ∀ d ∈ s, c ≠ d → 1 - δ ≤ ‖c - d‖) ∧ multiplicity E < s.card
N : ℕ := multiplicity E + 1
hN : N = multiplicity E + 1
δ : ℝ
hδ : 0 < δ
hδ' : δ < 1
s : Finset E
hs : ∀ c ∈ s, ‖c‖ ≤ 2
h's : ∀ c ∈ s, ∀ d ∈ s, c ≠ d → 1 - δ ≤ ‖c - d‖
s_card : multiplicity E < s.card
f : Fin N → E
f_inj : Function.Injective f
hfs : ∀ (y : Fin N), f y ∈ s
⊢ ∃ f, (∀ (i : Fin N), ‖f i‖ ≤ 2) ∧ Pairwise fun i j ↦ 1 - δ ≤ ‖f i - f j‖

Tactic:
exact ⟨f, fun i => hs _ (hfs i), fun i j hij => h's _ (hfs i) _ (hfs j) (f_inj.ne hij)⟩

Goal state after:
Module: Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace

Goal state before:
pp: E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
h✝ :
  ∀ (δ : ℝ),
    0 < δ → δ < 1 → ∃ s, (∀ c ∈ s, ‖c‖ ≤ 2) ∧ (∀ c ∈ s, ∀ d ∈ s, c ≠ d → 1 - δ ≤ ‖c - d‖) ∧ multiplicity E < s.card
N : ℕ := multiplicity E + 1
hN : N = multiplicity E + 1
F : ℝ → Fin N → E
hF : ∀ (δ : ℝ), 0 < δ → (∀ (i : Fin N), ‖F δ i‖ ≤ 2) ∧ Pairwise fun i j ↦ 1 - δ ≤ ‖F δ i - F δ j‖
f : Fin N → E
hf : ∀ (i : Fin N), ‖f i‖ ≤ 2
h'f : Pairwise fun i j ↦ 1 ≤ ‖f i - f j‖
finj : Function.Injective f
s : Finset E := Finset.image f Finset.univ
s_card : s.card = N
hs : ∀ c ∈ s, ‖c‖ ≤ 2
i j : Fin N
hij : ¬f j = f j
h : i = j
⊢ False

Tactic:
exact hij rfl

Goal state after:
Module: Mathlib.MeasureTheory.Covering.Besicovitch

Goal state before:
pp: case inr.inr
α : Type u_1
inst✝⁴ : MetricSpace α
inst✝³ : SecondCountableTopology α
inst✝² : MeasurableSpace α
inst✝¹ : OpensMeasurableSpace α
μ : Measure α
inst✝ : IsFiniteMeasure μ
N : ℕ
τ : ℝ
hτ : 1 < τ
hN : IsEmpty (SatelliteConfig α N τ)
s : Set α
r : α → ℝ
rpos : ∀ x ∈ s, 0 < r x
rle : ∀ x ∈ s, r x ≤ 1
hμs : 0 < μ s
h✝ : Nonempty α
Npos : N ≠ 0
o : Set α
so : s ⊆ o
omeas : MeasurableSet o
μo : μ o = μ s
a : BallPackage (↑s) α := { c := fun x ↦ ↑x, r := fun x ↦ r ↑x, rpos := ⋯, r_bound := 1, r_le := ⋯ }
⊢ ∃ t,
    ↑t ⊆ s ∧
      μ (s \ ⋃ x ∈ t, closedBall x (r x)) ≤ ↑N / (↑N + 1) * μ s ∧ (↑t).PairwiseDisjoint fun x ↦ closedBall x (r x)

Tactic:
rcases exist_disjoint_covering_families hτ hN a with ⟨u, hu, hu'⟩

Goal state after:
case inr.inr
α : Type u_1
inst✝⁴ : MetricSpace α
inst✝³ : SecondCountableTopology α
inst✝² : MeasurableSpace α
inst✝¹ : OpensMeasurableSpace α
μ : Measure α
inst✝ : IsFiniteMeasure μ
N : ℕ
τ : ℝ
hτ : 1 < τ
hN : IsEmpty (SatelliteConfig α N τ)
s : Set α
r : α → ℝ
rpos : ∀ x ∈ s, 0 < r x
rle : ∀ x ∈ s, r x ≤ 1
hμs : 0 < μ s
h✝ : Nonempty α
Npos : N ≠ 0
o : Set α
so : s ⊆ o
omeas : MeasurableSet o
μo : μ o = μ s
a : BallPackage (↑s) α := { c := fun x ↦ ↑x, r := fun x ↦ r ↑x, rpos := ⋯, r_bound := 1, r_le := ⋯ }
u : Fin N → Set ↑s
hu : ∀ (i : Fin N), (u i).PairwiseDisjoint fun j ↦ closedBall (a.c j) (a.r j)
hu' : range a.c ⊆ ⋃ i, ⋃ j ∈ u i, ball (a.c j) (a.r j)
⊢ ∃ t,
    ↑t ⊆ s ∧
      μ (s \ ⋃ x ∈ t, closedBall x (r x)) ≤ ↑N / (↑N + 1) * μ s ∧ (↑t).PairwiseDisjoint fun x ↦ closedBall x (r x)
Module: Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace

Goal state before:
pp: E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : NormedSpace ℝ E
inst✝ : FiniteDimensional ℝ E
n : ℕ
f : Fin n → E
h✝ : ∀ (i : Fin n), ‖f i‖ ≤ 2
h' : Pairwise fun i j ↦ 1 - goodδ E ≤ ‖f i - f j‖
finj : Function.Injective f
s : Finset E := Finset.image f Finset.univ
s_card : s.card = n
hs : ∀ c ∈ s, ‖c‖ ≤ 2
i j : Fin n
hij : ¬f j = f j
h : i = j
⊢ False

Tactic:
exact hij rfl

Goal state after:
Module: Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace

Goal state before:
pp: case inr
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
N : ℕ
τ : ℝ
a : SatelliteConfig E N τ
lastc : a.c (last N) = 0
lastr : a.r (last N) = 1
hτ : 1 ≤ τ
δ : ℝ
hδ1 : τ ≤ 1 + δ / 4
hδ2 : δ ≤ 1
c' : Fin N.succ → E := fun i ↦ if ‖a.c i‖ ≤ 2 then a.c i else (2 / ‖a.c i‖) • a.c i
norm_c'_le : ∀ (i : Fin N.succ), ‖c' i‖ ≤ 2
i j : Fin N.succ
inej : i ≠ j
hij : ‖a.c i‖ ≤ ‖a.c j‖
Hj : 2 < ‖a.c j‖
H'j : ‖a.c j‖ ≤ 2 ↔ False
⊢ 1 - δ ≤ ‖c' i - c' j‖

Tactic:
rcases le_or_gt ‖a.c i‖ 2 with (Hi | Hi)

Goal state after:
case inr.inl
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
N : ℕ
τ : ℝ
a : SatelliteConfig E N τ
lastc : a.c (last N) = 0
lastr : a.r (last N) = 1
hτ : 1 ≤ τ
δ : ℝ
hδ1 : τ ≤ 1 + δ / 4
hδ2 : δ ≤ 1
c' : Fin N.succ → E := fun i ↦ if ‖a.c i‖ ≤ 2 then a.c i else (2 / ‖a.c i‖) • a.c i
norm_c'_le : ∀ (i : Fin N.succ), ‖c' i‖ ≤ 2
i j : Fin N.succ
inej : i ≠ j
hij : ‖a.c i‖ ≤ ‖a.c j‖
Hj : 2 < ‖a.c j‖
H'j : ‖a.c j‖ ≤ 2 ↔ False
Hi : ‖a.c i‖ ≤ 2
⊢ 1 - δ ≤ ‖c' i - c' j‖

case inr.inr
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
N : ℕ
τ : ℝ
a : SatelliteConfig E N τ
lastc : a.c (last N) = 0
lastr : a.r (last N) = 1
hτ : 1 ≤ τ
δ : ℝ
hδ1 : τ ≤ 1 + δ / 4
hδ2 : δ ≤ 1
c' : Fin N.succ → E := fun i ↦ if ‖a.c i‖ ≤ 2 then a.c i else (2 / ‖a.c i‖) • a.c i
norm_c'_le : ∀ (i : Fin N.succ), ‖c' i‖ ≤ 2
i j : Fin N.succ
inej : i ≠ j
hij : ‖a.c i‖ ≤ ‖a.c j‖
Hj : 2 < ‖a.c j‖
H'j : ‖a.c j‖ ≤ 2 ↔ False
Hi : 2 < ‖a.c i‖
⊢ 1 - δ ≤ ‖c' i - c' j‖
Module: Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace

Goal state before:
pp: case inr
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
N : ℕ
τ : ℝ
a : SatelliteConfig E N τ
lastc : a.c (last N) = 0
lastr : a.r (last N) = 1
hτ : 1 ≤ τ
δ : ℝ
hδ1 : τ ≤ 1 + δ / 4
hδ2 : δ ≤ 1
c' : Fin N.succ → E := fun i ↦ if ‖a.c i‖ ≤ 2 then a.c i else (2 / ‖a.c i‖) • a.c i
norm_c'_le : ∀ (i : Fin N.succ), ‖c' i‖ ≤ 2
i j : Fin N.succ
inej : i ≠ j
hij : ‖a.c i‖ ≤ ‖a.c j‖
Hj : 2 < ‖a.c j‖
⊢ 1 - δ ≤ ‖c' i - c' j‖

Tactic:
· have H'j : ‖a.c j‖ ≤ 2 ↔ False := by simpa only [not_le, iff_false] using Hj
    rcases le_or_gt ‖a.c i‖ 2 with (Hi | Hi)
    · -- case `‖c i‖ ≤ 2`
      simp_rw [c', Hi, if_true, H'j, if_false]
      exact exists_normalized_aux2 a lastc lastr hτ δ hδ1 hδ2 i j inej Hi Hj
    · -- case `2 < ‖c i‖`
      have H'i : ‖a.c i‖ ≤ 2 ↔ False := by simpa only [not_le, iff_false] using Hi
      simp_rw [c', H'i, if_false, H'j, if_false]
      exact exists_normalized_aux3 a lastc lastr hτ δ hδ1 i j inej Hi hij

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

Goal state before:
pp: X : Type u_1
Y : Type u_2
inst✝¹ : PseudoEMetricSpace X
inst✝ : PseudoEMetricSpace Y
r : ℝ≥0
f : X → Y
C s t₁ t₂ : ℝ≥0
A : Set X
hf₁ : HolderOnWith C r f A
hf₂ : HolderOnWith C s f A
ht : t₁ + t₂ = 1
⊢ HolderOnWith C (r * t₁ + s * t₂) f A

Tactic:
convert! hf₁.interpolate hf₂ ht
  simp [← NNReal.rpow_add_of_nonneg, ← NNReal.coe_add, ht]

Goal state after:
Module: Mathlib.MeasureTheory.Covering.Besicovitch

Goal state before:
pp: α : Type u_1
inst✝⁵ : MetricSpace α
inst✝⁴ : SecondCountableTopology α
inst✝³ : MeasurableSpace α
inst✝² : OpensMeasurableSpace α
inst✝¹ : HasBesicovitchCovering α
μ : Measure α
inst✝ : IsFiniteMeasure μ
f : α → Set ℝ
s : Set α
hf : ∀ x ∈ s, ∀ δ > 0, (f x ∩ Ioo 0 δ).Nonempty
N : ℕ
τ : ℝ
hτ : 1 < τ
hN : IsEmpty (SatelliteConfig α N τ)
P : Finset (α × ℝ) → Prop :=
  fun t ↦ ((↑t).PairwiseDisjoint fun p ↦ closedBall p.1 p.2) ∧ (∀ p ∈ t, p.1 ∈ s) ∧ ∀ p ∈ t, p.2 ∈ f p.1
F : Finset (α × ℝ) → Finset (α × ℝ)
hF :
  ∀ (t : Finset (α × ℝ)),
    P t →
      t ⊆ F t ∧ P (F t) ∧ μ (s \ ⋃ p ∈ F t, closedBall p.1 p.2) ≤ ↑N / (↑N + 1) * μ (s \ ⋃ p ∈ t, closedBall p.1 p.2)
u : ℕ → Finset (α × ℝ) := fun n ↦ F^[n] ∅
n : ℕ
⊢ u n.succ = F (u n)

Tactic:
by
    simp only [u, Function.comp_apply, Function.iterate_succ']

Goal state after:
Module: Mathlib.Analysis.Calculus.Deriv.Star

Goal state before:
pp: 𝕜 : Type u
inst✝⁷ : NontriviallyNormedField 𝕜
inst✝⁶ : StarRing 𝕜
F : Type v
inst✝⁵ : NormedAddCommGroup F
inst✝⁴ : NormedSpace 𝕜 F
inst✝³ : StarAddMonoid F
inst✝² : StarModule 𝕜 F
inst✝¹ : ContinuousStar F
f : 𝕜 → F
f' : F
inst✝ : TrivialStar 𝕜
L : Filter (𝕜 × 𝕜)
h : HasDerivAtFilter f f' L
⊢ HasDerivAtFilter (fun x ↦ star (f x)) (star f') L

Tactic:
by
  simpa using h.hasFDerivAtFilter.star.hasDerivAtFilter

Goal state after:
Module: Mathlib.Analysis.Calculus.ContDiff.Bounds

Goal state before:
pp: case hg
𝕜 : Type u_1
inst✝⁶ : NontriviallyNormedField 𝕜
E : Type uE
inst✝⁵ : NormedAddCommGroup E
inst✝⁴ : NormedSpace 𝕜 E
Fu : Type u
inst✝³ : NormedAddCommGroup Fu
inst✝² : NormedSpace 𝕜 Fu
f : E → Fu
s : Set E
t : Set Fu
x : E
ht : UniqueDiffOn 𝕜 t
hs : UniqueDiffOn 𝕜 s
hst : MapsTo f s t
hx : x ∈ s
C D : ℝ
n : ℕ
IH :
  ∀ m ≤ n,
    ∀ {Gu : Type u} [inst : NormedAddCommGroup Gu] [inst_1 : NormedSpace 𝕜 Gu] {g : Fu → Gu},
      ContDiffOn 𝕜 (↑m) g t →
        ContDiffOn 𝕜 (↑m) f s →
          (∀ i ≤ m, ‖iteratedFDerivWithin 𝕜 i g t (f x)‖ ≤ C) →
            (∀ (i : ℕ), 1 ≤ i → i ≤ m → ‖iteratedFDerivWithin 𝕜 i f s x‖ ≤ D ^ i) →
              ‖iteratedFDerivWithin 𝕜 m (g ∘ f) s x‖ ≤ ↑m ! * C * D ^ m
Gu : Type u
inst✝¹ : NormedAddCommGroup Gu
inst✝ : NormedSpace 𝕜 Gu
g : Fu → Gu
hg : ContDiffOn 𝕜 (↑(n + 1)) g t
hf : ContDiffOn 𝕜 (↑(n + 1)) f s
hC : ∀ i ≤ n + 1, ‖iteratedFDerivWithin 𝕜 i g t (f x)‖ ≤ C
hD : ∀ (i : ℕ), 1 ≤ i → i ≤ n + 1 → ‖iteratedFDerivWithin 𝕜 i f s x‖ ≤ D ^ i
M : ↑n < ↑n.succ
Cnonneg : 0 ≤ C
Dnonneg : 0 ≤ D
i : ℕ
hi : i ≤ n
⊢ ↑i + 1 ≤ ↑(n + 1)

Tactic:
grw [Nat.cast_succ, hi]

Goal state after:
Module: Mathlib.Analysis.Calculus.FDeriv.Symmetric

Goal state before:
pp: 𝕜 : Type u_1
inst✝⁴ : NontriviallyNormedField 𝕜
E : Type u_2
F : Type u_3
inst✝³ : NormedAddCommGroup E
inst✝² : NormedSpace 𝕜 E
inst✝¹ : NormedAddCommGroup F
inst✝ : NormedSpace 𝕜 F
f : E → F
x : E
s : Set E
h : s ∈ 𝓝 x
⊢ fderivWithin 𝕜 (fderivWithin 𝕜 f s) s x = fderivWithin 𝕜 (fderivWithin 𝕜 f univ) univ x

Tactic:
apply fderivWithin_fderivWithin_eq_of_eventuallyEq

Goal state after:
𝕜 : Type u_1
inst✝⁴ : NontriviallyNormedField 𝕜
E : Type u_2
F : Type u_3
inst✝³ : NormedAddCommGroup E
inst✝² : NormedSpace 𝕜 E
inst✝¹ : NormedAddCommGroup F
inst✝ : NormedSpace 𝕜 F
f : E → F
x : E
s : Set E
h : s ∈ 𝓝 x
⊢ s =ᶠ[𝓝 x] univ