mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Topology.Compactification.OnePoint.Basic

Goal state before:
pp: case inr
X : Type u_1
Y : Type u_2
inst✝³ : TopologicalSpace X
s : Set (OnePoint X)
inst✝² : TopologicalSpace Y
inst✝¹ : T2Space Y
inst✝ : CompactSpace Y
y : Y
f : X → Y
hf : IsEmbedding f
hy : range f = {y}ᶜ
_i : T2Space X
this : Tendsto f (coclosedCompact X) (𝓝 y)
q : Y
hq : q ≠ y
⊢ (fun p ↦ p.elim y f) ((fun q ↦ if hq : q = y then ∞ else ↑(Exists.choose ⋯)) q) = q

Tactic:
have hq' : q ∈ range f := by simpa [hy]

Goal state after:
case inr
X : Type u_1
Y : Type u_2
inst✝³ : TopologicalSpace X
s : Set (OnePoint X)
inst✝² : TopologicalSpace Y
inst✝¹ : T2Space Y
inst✝ : CompactSpace Y
y : Y
f : X → Y
hf : IsEmbedding f
hy : range f = {y}ᶜ
_i : T2Space X
this : Tendsto f (coclosedCompact X) (𝓝 y)
q : Y
hq : q ≠ y
hq' : q ∈ range f
⊢ (fun p ↦ p.elim y f) ((fun q ↦ if hq : q = y then ∞ else ↑(Exists.choose ⋯)) q) = q
Module: Mathlib.Topology.Compactness.CompactlyGeneratedSpace

Goal state before:
pp: X : Type u
inst✝¹ : TopologicalSpace X
inst✝ : CompactlyGeneratedSpace X
s : Set X
hs : ∀ ⦃K : Set X⦄, IsCompact K → IsOpen[inst✝¹] (s ∩ K)
⊢ IsOpen[inst✝¹] s

Tactic:
refine isOpen' fun K _ _ _ f hf ↦ ?_

Goal state after:
X : Type u
inst✝¹ : TopologicalSpace X
inst✝ : CompactlyGeneratedSpace X
s : Set X
hs : ∀ ⦃K : Set X⦄, IsCompact K → IsOpen[inst✝¹] (s ∩ K)
K : Type u
x✝² : TopologicalSpace K
x✝¹ : CompactSpace K
x✝ : T2Space K
f : K → X
hf : Continuous[x✝², inst✝¹] f
⊢ IsOpen[x✝²] (f ⁻¹' s)
Module: Mathlib.Analysis.Complex.UpperHalfPlane.ProperAction

Goal state before:
pp: K : Set ℍ
hK : IsCompact K
⊢ ∃ A, ∀ (g : SL(2, ℝ)), g • I ∈ K → ↑g 1 0 ^ 2 + ↑g 1 1 ^ 2 ≤ A

Tactic:
rcases K.eq_empty_or_nonempty with rfl | hKne

Goal state after:
case inl
hK : IsCompact ∅
⊢ ∃ A, ∀ (g : SL(2, ℝ)), g • I ∈ ∅ → ↑g 1 0 ^ 2 + ↑g 1 1 ^ 2 ≤ A

case inr
K : Set ℍ
hK : IsCompact K
hKne : K.Nonempty
⊢ ∃ A, ∀ (g : SL(2, ℝ)), g • I ∈ K → ↑g 1 0 ^ 2 + ↑g 1 1 ^ 2 ≤ A
Module: Mathlib.Analysis.Complex.ValueDistribution.LogCounting.Basic

Goal state before:
pp: E : Type u_1
inst✝ : NormedAddCommGroup E
r : ℝ
z : E
f : locallyFinsupp E ℤ
ha : z ∈ closedBall 0 |r|
⊢ ((restrictMonoidHom ⋯) f) z = f z

Tactic:
simp_all [restrict_apply]

Goal state after:
Module: Mathlib.Analysis.Complex.ValueDistribution.Cartan

Goal state before:
pp: f : ℂ → ℂ
R : ℝ
h : Meromorphic f
hR : R ≠ 0
⊢ characteristic f ⊤ R = circleAverage (fun a ↦ circleAverage (fun x ↦ log ‖f x - a‖) 0 R + logCounting f ⊤ R) 0 1

Tactic:
simp only [characteristic, proximity, ↓reduceDIte, Pi.add_apply]

Goal state after:
f : ℂ → ℂ
R : ℝ
h : Meromorphic f
hR : R ≠ 0
⊢ circleAverage (fun x ↦ log⁺ ‖f x‖) 0 R + logCounting f ⊤ R =
    circleAverage (fun a ↦ circleAverage (fun x ↦ log ‖f x - a‖) 0 R + logCounting f ⊤ R) 0 1
Module: Mathlib.Analysis.ConstantSpeed

Goal state before:
pp: case refl
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : ℝ → E
s : Set ℝ
hs : s.Subsingleton
l : ℝ≥0
x : ℝ
hx hy : x ∈ s
⊢ eVariationOn f (s ∩ Icc x x) = ENNReal.ofReal (↑l * (x - x))

Tactic:
eVariationOn.subsingleton f (fun y hy z hz => hs hy.1 hz.1 : (s ∩ Icc x x).Subsingleton)

Goal state after:
case refl
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : ℝ → E
s : Set ℝ
hs : s.Subsingleton
l : ℝ≥0
x : ℝ
hx hy : x ∈ s
⊢ 0 = ENNReal.ofReal (↑l * (x - x))
Module: Mathlib.Analysis.Complex.ValueDistribution.LogCounting.Asymptotic

Goal state before:
pp: E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : DecidableEq E
inst✝ : ProperSpace E
e : E
n : ℤ
⊢ logCounting (single e n) =O[atTop] log

Tactic:
have h₁ : logCounting (single e n) =ᶠ[atTop] (n * log · - n * log ‖e‖) := by
    filter_upwards [eventually_ge_atTop ‖e‖] with r hr
    rw [logCounting_single_eq_log_sub_const hr]
    ring

Goal state after:
E : Type u_1
inst✝² : NormedAddCommGroup E
inst✝¹ : DecidableEq E
inst✝ : ProperSpace E
e : E
n : ℤ
h₁ : logCounting (single e n) =ᶠ[atTop] fun x ↦ ↑n * log x - ↑n * log ‖e‖
⊢ logCounting (single e n) =O[atTop] log
Module: Mathlib.Analysis.Complex.ValueDistribution.LogCounting.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝³ : NontriviallyNormedField 𝕜
inst✝² : ProperSpace 𝕜
E : Type u_2
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace 𝕜 E
U : Set 𝕜
f g : 𝕜 → E
a : WithTop E
a₀ : E
⊢ ℝ → ℝ

Tactic:
by
  by_cases h : a = ⊤
  · exact (divisor f univ)⁻.logCounting
  · exact (divisor (f · - a.untop₀) univ)⁺.logCounting

Goal state after:
Module: Mathlib.Analysis.ConstantSpeed

Goal state before:
pp: case inr.inl
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : ℝ → E
s : Set ℝ
l : ℝ≥0
t : Set ℝ
hfs : ∀ ⦃x : ℝ⦄, x ∈ s → ∀ ⦃y : ℝ⦄, y ∈ s → x ≤ y → eVariationOn f (s ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
hft : ∀ ⦃x : ℝ⦄, x ∈ t → ∀ ⦃y : ℝ⦄, y ∈ t → x ≤ y → eVariationOn f (t ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
x : ℝ
hs : IsGreatest s x
ht : IsLeast t x
z : ℝ
zt : z ∈ t
y : ℝ
ys : y ∈ s
zy : z ≤ y
⊢ eVariationOn f ((s ∪ t) ∩ Icc z y) = ENNReal.ofReal (↑l * (y - z))

pp: case inr.inr
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : ℝ → E
s : Set ℝ
l : ℝ≥0
t : Set ℝ
hfs : ∀ ⦃x : ℝ⦄, x ∈ s → ∀ ⦃y : ℝ⦄, y ∈ s → x ≤ y → eVariationOn f (s ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
hft : ∀ ⦃x : ℝ⦄, x ∈ t → ∀ ⦃y : ℝ⦄, y ∈ t → x ≤ y → eVariationOn f (t ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
x : ℝ
hs : IsGreatest s x
ht : IsLeast t x
z : ℝ
zt : z ∈ t
y : ℝ
yt : y ∈ t
zy : z ≤ y
⊢ eVariationOn f ((s ∪ t) ∩ Icc z y) = ENNReal.ofReal (↑l * (y - z))

Tactic:
· cases le_antisymm zy ((hs.2 ys).trans (ht.2 zt))
    simp only [Icc_self, sub_self, mul_zero, ENNReal.ofReal_zero]
    exact eVariationOn.subsingleton _ fun _ ⟨_, uz⟩ _ ⟨_, vz⟩ => uz.trans vz.symm

Goal state after:
case inr.inr
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : ℝ → E
s : Set ℝ
l : ℝ≥0
t : Set ℝ
hfs : ∀ ⦃x : ℝ⦄, x ∈ s → ∀ ⦃y : ℝ⦄, y ∈ s → x ≤ y → eVariationOn f (s ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
hft : ∀ ⦃x : ℝ⦄, x ∈ t → ∀ ⦃y : ℝ⦄, y ∈ t → x ≤ y → eVariationOn f (t ∩ Icc x y) = ENNReal.ofReal (↑l * (y - x))
x : ℝ
hs : IsGreatest s x
ht : IsLeast t x
z : ℝ
zt : z ∈ t
y : ℝ
yt : y ∈ t
zy : z ≤ y
⊢ eVariationOn f ((s ∪ t) ∩ Icc z y) = ENNReal.ofReal (↑l * (y - z))
Module: Mathlib.Analysis.Complex.ValueDistribution.LogCounting.Basic

Goal state before:
pp: 𝕜 : Type u_1
inst✝³ : NontriviallyNormedField 𝕜
inst✝² : ProperSpace 𝕜
E : Type u_2
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace 𝕜 E
α : Type u_3
s : Finset α
f : α → 𝕜 → E
h₁f : ∀ a ∈ s, Meromorphic (f a)
⊢ logCounting (∑ a ∈ s, f a) ⊤ ≤ᶠ[atTop] ∑ a ∈ s, logCounting (f a) ⊤

Tactic:
filter_upwards [eventually_ge_atTop 1] using fun _ hr ↦ logCounting_sum_top_le s f h₁f hr

Goal state after:
Module: Mathlib.Analysis.ConstantSpeed

Goal state before:
pp: case inr
α : Type u_1
inst✝¹ : LinearOrder α
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : α → E
s : Set α
hf : LocallyBoundedVariationOn f s
a : α
as : a ∈ s
b : α
bs : b ∈ s
c : α
cs : c ∈ s
h : variationOnFromTo f s a b ≤ variationOnFromTo f s a c
bc : b ≤ c
⊢ eVariationOn (naturalParameterization f s a)
      (variationOnFromTo f s a '' s ∩ Icc (-variationOnFromTo f s b a) (variationOnFromTo f s a c)) =
    ENNReal.ofReal (variationOnFromTo f s a c + - -variationOnFromTo f s b a)

Tactic:
neg_neg,

Goal state after:
case inr
α : Type u_1
inst✝¹ : LinearOrder α
E : Type u_2
inst✝ : PseudoEMetricSpace E
f : α → E
s : Set α
hf : LocallyBoundedVariationOn f s
a : α
as : a ∈ s
b : α
bs : b ∈ s
c : α
cs : c ∈ s
h : variationOnFromTo f s a b ≤ variationOnFromTo f s a c
bc : b ≤ c
⊢ eVariationOn (naturalParameterization f s a)
      (variationOnFromTo f s a '' s ∩ Icc (-variationOnFromTo f s b a) (variationOnFromTo f s a c)) =
    ENNReal.ofReal (variationOnFromTo f s a c + variationOnFromTo f s b a)
Module: Mathlib.Analysis.Convex.Between

Goal state before:
pp: R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁷ : Ring R
inst✝⁶ : PartialOrder R
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module R V
inst✝³ : AddTorsor V P
inst✝² : IsOrderedRing R
inst✝¹ : IsDomain R
inst✝ : IsTorsionFree R V
x z : P
hxz : x ≠ z
t : R
ht : t ∈ Set.Ioo 0 1
⊢ (t • (z -ᵥ x) +ᵥ x) -ᵥ x ≠ 0 ∧ (t • (z -ᵥ x) +ᵥ x) -ᵥ z ≠ 0

Tactic:
vadd_vsub_assoc,

Goal state after:
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁷ : Ring R
inst✝⁶ : PartialOrder R
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module R V
inst✝³ : AddTorsor V P
inst✝² : IsOrderedRing R
inst✝¹ : IsDomain R
inst✝ : IsTorsionFree R V
x z : P
hxz : x ≠ z
t : R
ht : t ∈ Set.Ioo 0 1
⊢ t • (z -ᵥ x) + (x -ᵥ x) ≠ 0 ∧ (t • (z -ᵥ x) +ᵥ x) -ᵥ z ≠ 0
Module: Mathlib.Analysis.Convex.BetweenList

Goal state before:
pp: R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁶ : Field R
inst✝⁵ : LinearOrder R
inst✝⁴ : IsStrictOrderedRing R
inst✝³ : AddCommGroup V
inst✝² : Module R V
inst✝¹ : AddTorsor V P
inst✝ : Nontrivial P
l : List P
⊢ (∃ p₁ p₂, p₁ ≠ p₂ ∧ ∃ l', l'.SortedLT ∧ map (⇑(lineMap p₁ p₂)) l' = l) ↔ List.Sbtw R l

Tactic:
refine ⟨fun ⟨p₁, p₂, hp₁p₂, l', hl's, hl'l⟩ ↦ ?_, fun h ↦ ?_⟩

Goal state after:
case refine_1
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁶ : Field R
inst✝⁵ : LinearOrder R
inst✝⁴ : IsStrictOrderedRing R
inst✝³ : AddCommGroup V
inst✝² : Module R V
inst✝¹ : AddTorsor V P
inst✝ : Nontrivial P
l : List P
x✝ : ∃ p₁ p₂, p₁ ≠ p₂ ∧ ∃ l', l'.SortedLT ∧ map (⇑(lineMap p₁ p₂)) l' = l
p₁ p₂ : P
hp₁p₂ : p₁ ≠ p₂
l' : List R
hl's : l'.SortedLT
hl'l : map (⇑(lineMap p₁ p₂)) l' = l
⊢ List.Sbtw R l

case refine_2
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁶ : Field R
inst✝⁵ : LinearOrder R
inst✝⁴ : IsStrictOrderedRing R
inst✝³ : AddCommGroup V
inst✝² : Module R V
inst✝¹ : AddTorsor V P
inst✝ : Nontrivial P
l : List P
h : List.Sbtw R l
⊢ ∃ p₁ p₂, p₁ ≠ p₂ ∧ ∃ l', l'.SortedLT ∧ map (⇑(lineMap p₁ p₂)) l' = l
Module: Mathlib.Analysis.Convex.Between

Goal state before:
pp: R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁷ : Ring R
inst✝⁶ : PartialOrder R
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module R V
inst✝³ : AddTorsor V P
inst✝² : IsOrderedRing R
inst✝¹ : IsDomain R
inst✝ : IsTorsionFree R V
x z : P
hxz : x ≠ z
t : R
ht : t ∈ Set.Ioo 0 1
⊢ t • (z -ᵥ x) + 0 ≠ 0 ∧ (t • (z -ᵥ x) +ᵥ x) -ᵥ z ≠ 0

Tactic:
vadd_vsub_assoc,

Goal state after:
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁷ : Ring R
inst✝⁶ : PartialOrder R
inst✝⁵ : AddCommGroup V
inst✝⁴ : Module R V
inst✝³ : AddTorsor V P
inst✝² : IsOrderedRing R
inst✝¹ : IsDomain R
inst✝ : IsTorsionFree R V
x z : P
hxz : x ≠ z
t : R
ht : t ∈ Set.Ioo 0 1
⊢ t • (z -ᵥ x) + 0 ≠ 0 ∧ t • (z -ᵥ x) + (x -ᵥ z) ≠ 0
Module: Mathlib.Analysis.Convex.BetweenList

Goal state before:
pp: case refine_1
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁶ : Field R
inst✝⁵ : LinearOrder R
inst✝⁴ : IsStrictOrderedRing R
inst✝³ : AddCommGroup V
inst✝² : Module R V
inst✝¹ : AddTorsor V P
inst✝ : Nontrivial P
p₁ p₂ : P
hp₁p₂ : p₁ ≠ p₂
l' : List R
hl's : l'.SortedLT
x✝ : ∃ p₁_1 p₂_1, p₁_1 ≠ p₂_1 ∧ ∃ l'_1, l'_1.SortedLT ∧ map (⇑(lineMap p₁_1 p₂_1)) l'_1 = map (⇑(lineMap p₁ p₂)) l'
⊢ List.Sbtw R l'

Tactic:
exact hl's.sbtw

Goal state after:
Module: Mathlib.CategoryTheory.CofilteredSystem

Goal state before:
pp: case refine_1
J : Type u
inst✝¹ : Category.{v_1, u} J
F : J ⥤ Type v
i : J
s : Set (F.obj i)
inst✝ : IsCofilteredOrEmpty J
h : F.IsMittagLeffler
j j₁ : J
g₁ : j₁ ⟶ i
f₁ : j₁ ⟶ j
j₂ : J
f₂ : j₂ ⟶ j₁
h₂ : F.eventualRange j₁ = range ⇑(ConcreteCategory.hom (F.map f₂))
j₃ : J
f₃ : j₃ ⟶ j₂
x : F.obj j₂
hx : x ∈ ⋂ f, ⇑(ConcreteCategory.hom (F.map f)) ⁻¹' s
this : (ConcreteCategory.hom (F.map f₂)) x ∈ F.eventualRange j₁
g₂ : j₃ ⟶ i
j₄ : J
f₄ : j₄ ⟶ j₃
h₄ : f₄ ≫ g₂ = f₄ ≫ (f₃ ≫ f₂) ≫ g₁
y : F.obj j₄
hy : (ConcreteCategory.hom (F.map f₄)) y ∈ F.eventualRange j₃
h₃ : (ConcreteCategory.hom (F.map (f₄ ≫ f₃ ≫ f₂))) y = (ConcreteCategory.hom (F.map f₂)) x
⊢ (ConcreteCategory.hom (F.map f₄)) y ∈ ⇑(ConcreteCategory.hom (F.map g₂)) ⁻¹' s

Tactic:
rw [mem_preimage, ← comp_apply, ← map_comp, h₄, ← Category.assoc, map_comp, comp_apply, h₃,
        ← comp_apply, ← map_comp]

Goal state after:
case refine_1
J : Type u
inst✝¹ : Category.{v_1, u} J
F : J ⥤ Type v
i : J
s : Set (F.obj i)
inst✝ : IsCofilteredOrEmpty J
h : F.IsMittagLeffler
j j₁ : J
g₁ : j₁ ⟶ i
f₁ : j₁ ⟶ j
j₂ : J
f₂ : j₂ ⟶ j₁
h₂ : F.eventualRange j₁ = range ⇑(ConcreteCategory.hom (F.map f₂))
j₃ : J
f₃ : j₃ ⟶ j₂
x : F.obj j₂
hx : x ∈ ⋂ f, ⇑(ConcreteCategory.hom (F.map f)) ⁻¹' s
this : (ConcreteCategory.hom (F.map f₂)) x ∈ F.eventualRange j₁
g₂ : j₃ ⟶ i
j₄ : J
f₄ : j₄ ⟶ j₃
h₄ : f₄ ≫ g₂ = f₄ ≫ (f₃ ≫ f₂) ≫ g₁
y : F.obj j₄
hy : (ConcreteCategory.hom (F.map f₄)) y ∈ F.eventualRange j₃
h₃ : (ConcreteCategory.hom (F.map (f₄ ≫ f₃ ≫ f₂))) y = (ConcreteCategory.hom (F.map f₂)) x
⊢ (ConcreteCategory.hom (F.map (f₂ ≫ g₁))) x ∈ s
Module: Mathlib.Analysis.Convex.Approximation

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
φ : E → ℝ
inst✝⁹ : RCLike 𝕜
inst✝⁸ : TopologicalSpace E
inst✝⁷ : AddCommGroup E
inst✝⁶ : Module ℝ E
inst✝⁵ : Module 𝕜 E
inst✝⁴ : IsScalarTower ℝ 𝕜 E
inst✝³ : IsTopologicalAddGroup E
inst✝² : ContinuousSMul 𝕜 E
inst✝¹ : LocallyConvexSpace ℝ E
inst✝ : HereditarilyLindelofSpace E
hφc : LowerSemicontinuous φ
hφcv : ConvexOn ℝ univ φ
𝓕 : Set (E → ℝ) := {f | f ≤ φ ∧ ∃ l c, f = ⇑re ∘ ⇑l + const E c}
hl : IsLUB 𝓕 φ
hr : ∀ f ∈ 𝓕, LowerSemicontinuous f
𝓕' : Set (E → ℝ)
h𝓕' : 𝓕' ⊆ 𝓕 ∧ 𝓕'.Countable ∧ IsLUB 𝓕' φ
this : 𝓕' = ∅
⊢ False

Tactic:
grind [(isLUB_empty_iff.1 (this ▸ h𝓕'.2.2)) (fun x => φ x - 1) 0]

Goal state after:
Module: Mathlib.Data.PEquiv

Goal state before:
pp: α : Type u
β : Type v
f : α ≃. β
x : β
y : α
⊢ some y = f.symm x ↔ f y = some x

Tactic:
by
  rw [← eq_some_iff, eq_comm]

Goal state after:
Module: Mathlib.Data.Matrix.PEquiv

Goal state before:
pp: l : Type u_2
m : Type u_3
n : Type u_4
α : Type u_5
inst✝² : Fintype m
inst✝¹ : DecidableEq m
inst✝ : NonAssocSemiring α
f : l ≃. m
i : l
j : n
M : Matrix m n α
⊢ (f.toMatrix * M) i j = Option.casesOn (f i) 0 fun fi ↦ M fi j

Tactic:
dsimp [toMatrix, Matrix.mul_apply]
  rcases h : f i with - | fi
  · simp
  · rw [Finset.sum_eq_single fi] <;> simp +contextual [eq_comm]

Goal state after:
Module: Mathlib.Analysis.Convex.Between

Goal state before:
pp: case inr
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Field R
inst✝⁴ : LinearOrder R
inst✝³ : IsStrictOrderedRing R
inst✝² : AddCommGroup V
inst✝¹ : Module R V
inst✝ : AddTorsor V P
x : P
v : V
r₁ r₂ : R
hr₁ : r₁ ≤ 0
hr₂ : r₂ ≤ 0
h : r₂ ≤ r₁
⊢ Wbtw R x (r₁ • v +ᵥ x) (r₂ • v +ᵥ x) ∨ Wbtw R x (r₂ • v +ᵥ x) (r₁ • v +ᵥ x)

Tactic:
exact Or.inl (wbtw_smul_vadd_smul_vadd_of_nonpos_of_le x v hr₁ h)

Goal state after:
Module: Mathlib.Analysis.Convex.Birkhoff

Goal state before:
pp: case refine_1
R : Type u_1
n : Type u_2
inst✝⁴ : Fintype n
inst✝³ : DecidableEq n
inst✝² : Field R
inst✝¹ : LinearOrder R
inst✝ : IsStrictOrderedRing R
⊢ Set.extremePoints R ((convexHull R) {x | ∃ σ, Equiv.Perm.permMatrix R σ = x}) ⊆
    {x | ∃ σ, Equiv.Perm.permMatrix R σ = x}

Tactic:
exact extremePoints_convexHull_subset

Goal state after:
Module: Mathlib.Analysis.Convex.Cone.InnerDual

Goal state before:
pp: E : Type u_2
inst✝² : NormedAddCommGroup E
inst✝¹ : InnerProductSpace ℝ E
inst✝ : CompleteSpace E
C : ProperCone ℝ E
⊢ innerDual ↑(innerDual ↑C) = C

Tactic:
by
  simpa using! C.dual_flip_dual (innerₗ E)

Goal state after:
Module: Mathlib.Analysis.Convex.Cone.Dual

Goal state before:
pp: E : Type u_1
F : Type u_2
inst✝⁹ : TopologicalSpace E
inst✝⁸ : AddCommGroup E
inst✝⁷ : IsTopologicalAddGroup E
inst✝⁶ : TopologicalSpace F
inst✝⁵ : AddCommGroup F
inst✝⁴ : Module ℝ E
inst✝³ : ContinuousSMul ℝ E
inst✝² : LocallyConvexSpace ℝ E
inst✝¹ : Module ℝ F
p : E →ₗ[ℝ] F →ₗ[ℝ] ℝ
inst✝ : p.IsContPerfPair
C : ProperCone ℝ E
⊢ dual p.flip ↑(dual p ↑C) = C

Tactic:
refine le_antisymm (fun x ↦ ?_) subset_dual_dual

Goal state after:
E : Type u_1
F : Type u_2
inst✝⁹ : TopologicalSpace E
inst✝⁸ : AddCommGroup E
inst✝⁷ : IsTopologicalAddGroup E
inst✝⁶ : TopologicalSpace F
inst✝⁵ : AddCommGroup F
inst✝⁴ : Module ℝ E
inst✝³ : ContinuousSMul ℝ E
inst✝² : LocallyConvexSpace ℝ E
inst✝¹ : Module ℝ F
p : E →ₗ[ℝ] F →ₗ[ℝ] ℝ
inst✝ : p.IsContPerfPair
C : ProperCone ℝ E
x : E
⊢ x ∈ dual p.flip ↑(dual p ↑C) → x ∈ C
Module: Mathlib.Analysis.Convex.Between

Goal state before:
pp: R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Field R
inst✝⁴ : LinearOrder R
inst✝³ : IsStrictOrderedRing R
inst✝² : AddCommGroup V
inst✝¹ : Module R V
inst✝ : AddTorsor V P
x y : P
⊢ 2⁻¹ • (((x -ᵥ y) +ᵥ x) -ᵥ y) +ᵥ y = x

Tactic:
vadd_vsub_assoc,

Goal state after:
R : Type u_1
V : Type u_2
P : Type u_4
inst✝⁵ : Field R
inst✝⁴ : LinearOrder R
inst✝³ : IsStrictOrderedRing R
inst✝² : AddCommGroup V
inst✝¹ : Module R V
inst✝ : AddTorsor V P
x y : P
⊢ 2⁻¹ • (x -ᵥ y + (x -ᵥ y)) +ᵥ y = x
Module: Mathlib.Analysis.Convex.Exposed

Goal state before:
pp: case inl
𝕜 : Type u_1
E : Type u_2
inst✝⁷ : TopologicalSpace 𝕜
inst✝⁶ : Ring 𝕜
inst✝⁵ : PartialOrder 𝕜
inst✝⁴ : AddCommMonoid E
inst✝³ : TopologicalSpace E
inst✝² : Module 𝕜 E
inst✝¹ : IsOrderedRing 𝕜
inst✝ : Nontrivial 𝕜
A : Set E
hAB : IsExposed 𝕜 A ∅
x : E
h : 1 ≤ 0 x
⊢ False

Tactic:
zero_apply

Goal state after:
case inl
𝕜 : Type u_1
E : Type u_2
inst✝⁷ : TopologicalSpace 𝕜
inst✝⁶ : Ring 𝕜
inst✝⁵ : PartialOrder 𝕜
inst✝⁴ : AddCommMonoid E
inst✝³ : TopologicalSpace E
inst✝² : Module 𝕜 E
inst✝¹ : IsOrderedRing 𝕜
inst✝ : Nontrivial 𝕜
A : Set E
hAB : IsExposed 𝕜 A ∅
x : E
h : 1 ≤ 0
⊢ False
Module: Mathlib.Analysis.Convex.Continuous

Goal state before:

Tactic:
_ = ‖(x - x₀) + (ε / ‖x - y‖) • (x - y)‖ := by simp only [z, add_sub_right_comm]
        _ ≤ ‖x - x₀‖ + ‖(ε / ‖x - y‖) • (x - y)‖ := norm_add_le ..
        _ < r - ε + ε :=
          add_lt_add_of_lt_of_le (mem_ball_iff_norm.1 hx) <| by
            simp [norm_smul, abs_of_nonneg, hε.le, hxy.ne']
        _ = r := by simp

Goal state after:
Module: Mathlib.Analysis.Convex.Independent

Goal state before:
pp: case refine_1
𝕜 : Type u_1
E : Type u_2
ι : Type u_3
inst✝³ : Semiring 𝕜
inst✝² : PartialOrder 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
p : ι → E
hc : ConvexIndependent 𝕜 p
i : ι
s : Set ι
h : p i ∈ (convexHull 𝕜) (p '' (s \ {i}))
⊢ False

Tactic:
hc.mem_convexHull_iff

Goal state after:
case refine_1
𝕜 : Type u_1
E : Type u_2
ι : Type u_3
inst✝³ : Semiring 𝕜
inst✝² : PartialOrder 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
p : ι → E
hc : ConvexIndependent 𝕜 p
i : ι
s : Set ι
h : i ∈ s \ {i}
⊢ False
Module: Mathlib.Analysis.Convex.Independent

Goal state before:
pp: case refine_2
𝕜 : Type u_1
E : Type u_2
ι : Type u_3
inst✝⁴ : Field 𝕜
inst✝³ : LinearOrder 𝕜
inst✝² : IsStrictOrderedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
p : ι → E
h : ∀ (s : Finset ι) (x : ι), p x ∈ (convexHull 𝕜) ↑(image p s) → x ∈ s
s : Set ι
x : ι
hx : p x ∈ (convexHull 𝕜) (p '' s)
hp : Injective p
⊢ x ∈ s

Tactic:
convexHull_eq_union_convexHull_finite_subsets

Goal state after:
case refine_2
𝕜 : Type u_1
E : Type u_2
ι : Type u_3
inst✝⁴ : Field 𝕜
inst✝³ : LinearOrder 𝕜
inst✝² : IsStrictOrderedRing 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
p : ι → E
h : ∀ (s : Finset ι) (x : ι), p x ∈ (convexHull 𝕜) ↑(image p s) → x ∈ s
s : Set ι
x : ι
hx : p x ∈ ⋃ t, ⋃ (_ : ↑t ⊆ p '' s), (convexHull 𝕜) ↑t
hp : Injective p
⊢ x ∈ s
Module: Mathlib.Analysis.Convex.Continuous

Goal state before:
pp: E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
C : Set E
f : E → ℝ
hf : ConvexOn ℝ C f
x₀ : E
hC : C ∈ 𝓝 x₀
r : ℝ
hr : ∀ᶠ (x : ℝ) in Filter.map f (𝓝 x₀), (fun x1 x2 ↦ x1 ≤ x2) x r
this : Filter.Tendsto (fun y ↦ 2 • x₀ - y) (𝓝 x₀) (𝓝 x₀)
⊢ ∀ᶠ (x : ℝ) in Filter.map |f| (𝓝 x₀), (fun x1 x2 ↦ x1 ≤ x2) x (|r| + 2 * |f x₀|)

Tactic:
simp only [Filter.eventually_map, Pi.abs_apply, abs_le'] at hr ⊢

Goal state after:
E : Type u_1
inst✝¹ : NormedAddCommGroup E
inst✝ : NormedSpace ℝ E
C : Set E
f : E → ℝ
hf : ConvexOn ℝ C f
x₀ : E
hC : C ∈ 𝓝 x₀
r : ℝ
this : Filter.Tendsto (fun y ↦ 2 • x₀ - y) (𝓝 x₀) (𝓝 x₀)
hr : ∀ᶠ (a : E) in 𝓝 x₀, f a ≤ r
⊢ ∀ᶠ (a : E) in 𝓝 x₀, f a ≤ |r| + 2 * |f x₀| ∧ -f a ≤ |r| + 2 * |f x₀|
Module: Mathlib.Analysis.Convex.Intrinsic

Goal state before:
pp: 𝕜 : Type u_1
V : Type u_2
P : Type u_5
inst✝⁴ : Ring 𝕜
inst✝³ : AddCommGroup V
inst✝² : Module 𝕜 V
inst✝¹ : TopologicalSpace P
inst✝ : AddTorsor V P
⊢ intrinsicInterior 𝕜 ∅ = ∅

Tactic:
simp [intrinsicInterior]

Goal state after:
Module: Mathlib.Analysis.Convex.Intrinsic

Goal state before:
pp: 𝕜 : Type u_1
V : Type u_2
P : Type u_5
inst✝⁴ : Ring 𝕜
inst✝³ : AddCommGroup V
inst✝² : Module 𝕜 V
inst✝¹ : TopologicalSpace P
inst✝ : AddTorsor V P
s : Set P
⊢ (fun a ↦ ↑a) '' (closure[instTopologicalSpaceSubtype] (Subtype.val ⁻¹' s) \ frontier (Subtype.val ⁻¹' s)) =
    intrinsicInterior 𝕜 s

Tactic:
by
    rw [closure_sdiff_frontier, intrinsicInterior]

Goal state after:
Module: Mathlib.Analysis.Convex.Integral

Goal state before:
pp: α : Type u_1
E : Type u_2
m0 : MeasurableSpace α
inst✝³ : NormedAddCommGroup E
inst✝² : NormedSpace ℝ E
inst✝¹ : CompleteSpace E
μ : Measure α
s : Set E
t : Set α
f : α → E
inst✝ : IsFiniteMeasure μ
hs : Convex ℝ s
h0 : μ t ≠ 0
hfs : ∀ᵐ (x : α) ∂μ, f x ∈ s
hfi : Integrable f μ
ht : ⨍ (x : α) in t, f x ∂μ ∈ interior s
⊢ ⨍ (x : α), f x ∂μ ∈ interior s

Tactic:
rw [← measure_toMeasurable] at h0; rw [← restrict_toMeasurable (by finiteness)] at ht
  by_cases h0' : μ (toMeasurable μ t)ᶜ = 0
  · rw [← ae_eq_univ] at h0'
    rwa [restrict_congr_set h0', restrict_univ] at ht
  exact hs.openSegment_interior_closure_subset_interior ht
      (hs.set_average_mem_closure h0' (by finiteness) (ae_restrict_of_ae hfs) hfi.integrableOn)
      (average_mem_openSegment_compl_self (measurableSet_toMeasurable μ t).nullMeasurableSet h0
        h0' hfi)

Goal state after:
Module: Mathlib.Geometry.Convex.Set

Goal state before:
pp: ι : Type u_1
R : Type u_3
X : Type u_5
inst✝³ : Semiring R
inst✝² : PartialOrder R
inst✝¹ : IsStrictOrderedRing R
inst✝ : ConvexSpace R X
s : Set X
hs : IsConvexSet R s
w : StdSimplex R ι
f : ι → X
hf : ∀ (i : ι), w.weights i ≠ 0 → f i ∈ s
⊢ ↑(mapDomain f w.weights).support ⊆ s

Tactic:
mapDomain_support

Goal state after:
ι : Type u_1
R : Type u_3
X : Type u_5
inst✝³ : Semiring R
inst✝² : PartialOrder R
inst✝¹ : IsStrictOrderedRing R
inst✝ : ConvexSpace R X
s : Set X
hs : IsConvexSet R s
w : StdSimplex R ι
f : ι → X
hf : ∀ (i : ι), w.weights i ≠ 0 → f i ∈ s
⊢ ↑(Finset.image f w.weights.support) ⊆ s
Module: Mathlib.Analysis.Convex.Quasiconvex

Goal state before:
pp: E : Type u_4
inst✝⁵ : AddCommGroup E
inst✝⁴ : Module ℝ E
inst✝³ : TopologicalSpace E
inst✝² : IsTopologicalAddGroup E
inst✝¹ : ContinuousSMul ℝ E
β : Type u_5
inst✝ : Preorder β
f : E → β
s : Set E
t : β
hfc : QuasiconcaveOn ℝ s f
⊢ IsPreconnected (f ⁻¹' Ici t ∩ range Subtype.val)

Tactic:
Subtype.range_coe,

Goal state after:
E : Type u_4
inst✝⁵ : AddCommGroup E
inst✝⁴ : Module ℝ E
inst✝³ : TopologicalSpace E
inst✝² : IsTopologicalAddGroup E
inst✝¹ : ContinuousSMul ℝ E
β : Type u_5
inst✝ : Preorder β
f : E → β
s : Set E
t : β
hfc : QuasiconcaveOn ℝ s f
⊢ IsPreconnected (f ⁻¹' Ici t ∩ s)
Module: Mathlib.Analysis.Convex.Radon

Goal state before:
pp: case inl
ι : Type u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁷ : Field 𝕜
inst✝⁶ : LinearOrder 𝕜
inst✝⁵ : IsStrictOrderedRing 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : FiniteDimensional 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : T2Space E
F : ι → Set E
h_convex : ∀ (i : ι), Convex 𝕜 (F i)
h_compact : ∀ (i : ι), IsCompact (F i)
h_inter : ∀ (I : Finset ι), #I ≤ finrank 𝕜 E + 1 → (⋂ i ∈ I, F i).Nonempty
h✝ : IsEmpty ι
⊢ (⋂ i, F i).Nonempty

pp: case inr
ι : Type u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁷ : Field 𝕜
inst✝⁶ : LinearOrder 𝕜
inst✝⁵ : IsStrictOrderedRing 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : FiniteDimensional 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : T2Space E
F : ι → Set E
h_convex : ∀ (i : ι), Convex 𝕜 (F i)
h_compact : ∀ (i : ι), IsCompact (F i)
h_inter : ∀ (I : Finset ι), #I ≤ finrank 𝕜 E + 1 → (⋂ i ∈ I, F i).Nonempty
h_nonempty : Nonempty ι
⊢ (⋂ i, F i).Nonempty

Tactic:
· simp only [iInter_of_empty, Set.univ_nonempty]

Goal state after:
case inr
ι : Type u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁷ : Field 𝕜
inst✝⁶ : LinearOrder 𝕜
inst✝⁵ : IsStrictOrderedRing 𝕜
inst✝⁴ : AddCommGroup E
inst✝³ : Module 𝕜 E
inst✝² : FiniteDimensional 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : T2Space E
F : ι → Set E
h_convex : ∀ (i : ι), Convex 𝕜 (F i)
h_compact : ∀ (i : ι), IsCompact (F i)
h_inter : ∀ (I : Finset ι), #I ≤ finrank 𝕜 E + 1 → (⋂ i ∈ I, F i).Nonempty
h_nonempty : Nonempty ι
⊢ (⋂ i, F i).Nonempty