awhecmu/canonical-drafter-extract-mathlib huggingface dataset:
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
s''t'C : s'' ∪ t' ∈ C
this : m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯) = (m : (a : Set α) → E) (s'' ∪ t')
⊢ (↑1 : ℝ≥0∞) *
      edist (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯)
        (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) <
    4 * δ
have simp : (μ : (a : Set α) → ℝ≥0∞)
    ((↑(Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') sorry) : Set α) ∆
      (↑(Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) sorry) : Set α)) <
  4 * δ
Tactic: simp only [ENNReal.coe_one, MeasuredSets.edist_def, one_mul]
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
s''t'C : s'' ∪ t' ∈ C
this : m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯) = (m : (a : Set α) → E) (s'' ∪ t')
⊢ (μ : (a : Set α) → ℝ≥0∞)
      ((↑(Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯) : Set α) ∆
        (↑(Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) : Set α)) <
    4 * δ
have change : (μ : (a : Set α) → ℝ≥0∞) ((s'' ∪ t') ∆ ((↑s : Set α) ∪ (↑t : Set α))) < 4 * δ
Tactic: change μ ((s'' ∪ t') ∆ (s ∪ t)) < 4 * δ
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
s''t'C : s'' ∪ t' ∈ C
this : m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯) = (m : (a : Set α) → E) (s'' ∪ t')
⊢ (μ : (a : Set α) → ℝ≥0∞) ((s'' ∪ t') ∆ ((↑s : Set α) ∪ (↑t : Set α))) < 4 * δ
have calc : HAdd.hAdd (α := ℝ≥0∞) (β := ℝ≥0∞) ((μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) : ℝ≥0∞)
    ((μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) : ℝ≥0∞) <
  3 * δ + δ
Tactic: calc μ ((s'' ∪ t') ∆ (s ∪ t))
      _ ≤ μ (s'' ∆ s ∪ t' ∆ t) := measure_mono (Set.union_symmDiff_union_subset ..)
      _ ≤ μ (s'' ∆ s) + μ (t' ∆ t) := measure_union_le _ _
      _ < 3 * δ + δ := by gcongr
      _ = 4 * δ := by ring
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
s''t'C : s'' ∪ t' ∈ C
this : m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) (s'' ∪ t') ⋯) = (m : (a : Set α) → E) (s'' ∪ t')
calc :
  HAdd.hAdd (α := ℝ≥0∞) (β := ℝ≥0∞) ((μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) : ℝ≥0∞)
      ((μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) : ℝ≥0∞) <
    3 * δ + δ
⊢ (μ : (a : Set α) → ℝ≥0∞) ((s'' ∪ t') ∆ ((↑s : Set α) ∪ (↑t : Set α))) < 4 * δ
have calc₁ : 3 * δ + δ = 4 * δ
Tactic: calc μ ((s'' ∪ t') ∆ (s ∪ t))
      _ ≤ μ (s'' ∆ s ∪ t' ∆ t) := measure_mono (Set.union_symmDiff_union_subset ..)
      _ ≤ μ (s'' ∆ s) + μ (t' ∆ t) := measure_union_le _ _
      _ < 3 * δ + δ := by gcongr
      _ = 4 * δ := by ring
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (hypothesis)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
⊢ ‖m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) - m₁ s - m₁ t‖ₑ < ε
have Ist : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) (s'' ∪ t') : E)
      (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) sorry))‖ₑ <
  4 * δ
Tactic: have Ist : ‖m (s'' ∪ t') - m₁ ⟨s ∪ t, s.2.union t.2⟩‖ₑ < 4 * δ := by
      have s''t'C : s'' ∪ t' ∈ C := hC.union_mem s''C t'C
      have : m₁ ⟨s'' ∪ t', hCmeas _ s''t'C⟩ = m (s'' ∪ t') :=
        C'_dense.extend_eq lip.continuous ⟨⟨s'' ∪ t', hCmeas _ s''t'C⟩, ⟨s'' ∪ t', s''t'C, rfl⟩⟩
      rw [← this, ← edist_eq_enorm_sub]
      apply (m₁_lip _ _).trans_lt
      simp only [ENNReal.coe_one, MeasuredSets.edist_def, one_mul]
      change μ ((s'' ∪ t') ∆ (s ∪ t)) < 4 * δ
      calc μ ((s'' ∪ t') ∆ (s ∪ t))
      _ ≤ μ (s'' ∆ s ∪ t' ∆ t) := measure_mono (Set.union_symmDiff_union_subset ..)
      _ ≤ μ (s'' ∆ s) + μ (t' ∆ t) := measure_union_le _ _
      _ < 3 * δ + δ := by gcongr
      _ = 4 * δ := by ring
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
Ist :
  ‖HSub.hSub (α := E) ((m : (a : Set α) → E) (s'' ∪ t') : E)
        (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯))‖ₑ <
    4 * δ
⊢ ‖HSub.hSub (β := E) (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯))
            ((m : (a : Set α) → E) (s'' ∪ t') : E)‖ₑ +
        ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ +
      ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ <
    4 * δ + 3 * δ + δ
have xz : ‖HSub.hSub (β := E) (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) sorry))
      ((m : (a : Set α) → E) (s'' ∪ t') : E)‖ₑ <
  4 * δ
Tactic: gcongr
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
s t : MeasuredSets μ
h : Disjoint (↑s : Set α) (↑t : Set α)
ε : ℝ≥0∞
εpos : ε > 0
δ : ℝ≥0∞
δpos : 0 < δ
hδ : 8 * δ = ε
s' : Set α
s'C : s' ∈ C
hs' : (μ : (a : Set α) → ℝ≥0∞) (s' ∆ (↑s : Set α)) < δ
t' : Set α
t'C : t' ∈ C
ht' : (μ : (a : Set α) → ℝ≥0∞) (t' ∆ (↑t : Set α)) < δ
It : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ < δ
hμ' : (μ : (a : Set α) → ℝ≥0∞) (s' ∩ t') < 2 * δ
s'' : Set α := s' \ t'
s''C : s'' ∈ C
hs'' : (μ : (a : Set α) → ℝ≥0∞) (s'' ∆ (↑s : Set α)) < 3 * δ
Is : ‖HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s)‖ₑ < 3 * δ
Ist :
  ‖HSub.hSub (α := E) ((m : (a : Set α) → E) (s'' ∪ t') : E)
        (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯))‖ₑ <
    4 * δ
⊢ ‖m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) - m₁ s - m₁ t‖ₑ < ε
have calc : ‖m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) sorry) - m₁ s - m₁ t‖ₑ =
  ‖HSub.hSub (β := E)
            (HSub.hSub (α := E) (β := E) ((m : (a : Set α) → E) (s'' ∪ t') : E) ((m : (a : Set α) → E) s'' : E))
            ((m : (a : Set α) → E) t' : E) +
          HSub.hSub (β := E) (m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) sorry))
            ((m : (a : Set α) → E) (s'' ∪ t') : E) +
        HSub.hSub (α := E) ((m : (a : Set α) → E) s'' : E) (m₁ s) +
      HSub.hSub (α := E) ((m : (a : Set α) → E) t' : E) (m₁ t)‖ₑ
Tactic: calc ‖m₁ (⟨s ∪ t, s.2.union t.2⟩) - m₁ s - m₁ t‖ₑ
    _ = ‖(m (s'' ∪ t') - m s'' - m t') + (m₁ ⟨s ∪ t, s.2.union t.2⟩ - m (s'' ∪ t'))
          + (m s'' - m₁ s) + (m t' - m₁ t)‖ₑ := by abel_nf
    _ ≤ ‖m (s'' ∪ t') - m s'' - m t'‖ₑ + ‖m₁ ⟨s ∪ t, s.2.union t.2⟩ - m (s'' ∪ t')‖ₑ
          + ‖m s'' - m₁ s‖ₑ + ‖m t' - m₁ t‖ₑ := enorm_add₄_le
    _ = ‖m₁ ⟨s ∪ t, s.2.union t.2⟩ - m (s'' ∪ t')‖ₑ + ‖m s'' - m₁ s‖ₑ + ‖m t' - m₁ t‖ₑ := by
      rw [addContent_union hC s''C t'C Set.disjoint_sdiff_left]
      simp
    _ < 4 * δ + 3 * δ + δ := by
      gcongr
      rwa [enorm_sub_rev]
    _ = 8 * δ := by ring
    _ = ε := hδ
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
hAddit :
  ∀ (s t : MeasuredSets μ) (h : Disjoint (↑s : Set α) (↑t : Set α)),
    m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) = m₁ s + m₁ t
m' : (s : Set α) → E :=
  fun (s : Set α) ↦ if hs : MeasurableSet s then m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) s hs) else 0
⊢ VectorMeasure α E
have hm₁ : ∀ (s : Set α), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
Tactic: apply VectorMeasure.of_additive_of_le_measure m' (μ := μ)
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
hAddit :
  ∀ (s t : MeasuredSets μ) (h : Disjoint (↑s : Set α) (↑t : Set α)),
    m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) = m₁ s + m₁ t
m' : (s : Set α) → E :=
  fun (s : Set α) ↦ if hs : MeasurableSet s then m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) s hs) else 0
hm₁ : ∀ (s : Set α), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
⊢ VectorMeasure α E
have h'm : ∀ (s t : Set α), MeasurableSet s → MeasurableSet t → Disjoint s t → m' (s ∪ t) = m' s + m' t
Tactic: apply VectorMeasure.of_additive_of_le_measure m' (μ := μ)
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
hAddit :
  ∀ (s t : MeasuredSets μ) (h : Disjoint (↑s : Set α) (↑t : Set α)),
    m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) = m₁ s + m₁ t
m' : (s : Set α) → E :=
  fun (s : Set α) ↦ if hs : MeasurableSet s then m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) s hs) else 0
hm₁ : ∀ (s : Set α), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'm : ∀ (s t : Set α), MeasurableSet s → MeasurableSet t → Disjoint s t → m' (s ∪ t) = m' s + m' t
⊢ VectorMeasure α E
have h''m : ∀ (s : Set α), ¬MeasurableSet s → m' s = 0
Tactic: apply VectorMeasure.of_additive_of_le_measure m' (μ := μ)
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
hAddit :
  ∀ (s t : MeasuredSets μ) (h : Disjoint (↑s : Set α) (↑t : Set α)),
    m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) = m₁ s + m₁ t
m' : (s : Set α) → E :=
  fun (s : Set α) ↦ if hs : MeasurableSet s then m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) s hs) else 0
s : Set α
⊢ ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
have pos : ∀ (hs : MeasurableSet s), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
Tactic: by_cases hs : MeasurableSet s
-- Lean 4 proof step from Mathlib.MeasureTheory.VectorMeasure.AddContent (goal)
Goal:
α : Type u_1
hα : MeasurableSpace α
E : Type u_2
inst : NormedAddCommGroup E
inst_1 : CompleteSpace E
μ : Measure α
inst_2 : IsFiniteMeasure μ
C : Set (Set α)
m : AddContent E C
hC : IsSetRing C
hCmeas : ∀ s ∈ C, MeasurableSet s
hm : ∀ s ∈ C, enorm.{u_2} (E := E) ((m : (a : Set α) → E) s : E) ≤ (μ : (a : Set α) → ℝ≥0∞) s
h'C : ∀ (t : Set α) (ε : ℝ≥0∞), MeasurableSet t → 0 < ε → ∃ s ∈ C, (μ : (a : Set α) → ℝ≥0∞) (s ∆ t) < ε
C' : Set (MeasuredSets μ) := {s : MeasuredSets μ | ∃ c ∈ C, (↑s : Set α) = c}
C'C : ∀ (s : MeasuredSets μ) (hs : s ∈ C'), (↑s : Set α) ∈ C
C'_dense : Dense C'
m₀ : (↑C' : Type u_1) → E := fun (x : (↑C' : Type u_1)) ↦ (m : (a : Set α) → E) (↑(↑x : MeasuredSets μ) : Set α)
lip : LipschitzWith 1 m₀
m₁ : MeasuredSets μ → E := C'_dense.extend (s := C') m₀
m₁_lip : LipschitzWith 1 m₁
hBound : ∀ (s : MeasuredSets μ), ‖m₁ s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) (↑s : Set α)
hAddit :
  ∀ (s t : MeasuredSets μ) (h : Disjoint (↑s : Set α) (↑t : Set α)),
    m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) ((↑s : Set α) ∪ (↑t : Set α)) ⋯) = m₁ s + m₁ t
m' : (s : Set α) → E :=
  fun (s : Set α) ↦ if hs : MeasurableSet s then m₁ (Subtype.mk (p := fun (s : Set α) ↦ MeasurableSet s) s hs) else 0
s : Set α
pos : ∀ (hs : MeasurableSet s), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
⊢ ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
have neg : ∀ (hs : ¬MeasurableSet s), ‖m' s‖ₑ ≤ (μ : (a : Set α) → ℝ≥0∞) s
Tactic: by_cases hs : MeasurableSet s