Theorem: MeasureTheory.SignedMeasure.toSignedMeasure_toJordanDecomposition
File: Mathlib/MeasureTheory/Decomposition/Jordan.lean

Proof steps:
state_before: α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
⊢ s.toJordanDecomposition.toSignedMeasure = s
state_after: case intro.intro.intro.intro.intro
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
⊢ s.toJordanDecomposition.toSignedMeasure = s
tactic: obtain ⟨i, hi₁, hi₂, hi₃, hμ, hν⟩ := s.toJordanDecomposition_spec
state_before: case intro.intro.intro.intro.intro
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
⊢ s.toJordanDecomposition.toSignedMeasure = s
state_after: case intro.intro.intro.intro.intro
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
⊢ (s.toMeasureOfZeroLE i hi₁ hi₂).toSignedMeasure - (s.toMeasureOfLEZero iᶜ ⋯ hi₃).toSignedMeasure = s
tactic: simp only [JordanDecomposition.toSignedMeasure, hμ, hν]
state_before: case intro.intro.intro.intro.intro
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
⊢ (s.toMeasureOfZeroLE i hi₁ hi₂).toSignedMeasure - (s.toMeasureOfLEZero iᶜ ⋯ hi₃).toSignedMeasure = s
state_after: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ ↑((s.toMeasureOfZeroLE i hi₁ hi₂).toSignedMeasure - (s.toMeasureOfLEZero iᶜ ⋯ hi₃).toSignedMeasure) k = ↑s k
tactic: ext k hk
state_before: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ ↑((s.toMeasureOfZeroLE i hi₁ hi₂).toSignedMeasure - (s.toMeasureOfLEZero iᶜ ⋯ hi₃).toSignedMeasure) k = ↑s k
state_after: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ (↑⟨↑s (i ∩ k), ⋯⟩).toReal - (↑⟨-↑s (iᶜ ∩ k), ⋯⟩).toReal = ↑s k
tactic: rw [toSignedMeasure_sub_apply hk, toMeasureOfZeroLE_apply _ hi₂ hi₁ hk,
    toMeasureOfLEZero_apply _ hi₃ hi₁.compl hk]
state_before: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ (↑⟨↑s (i ∩ k), ⋯⟩).toReal - (↑⟨-↑s (iᶜ ∩ k), ⋯⟩).toReal = ↑s k
state_after: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ ↑s (i ∩ k) + ↑s (iᶜ ∩ k) = ↑s k
tactic: simp only [ENNReal.coe_toReal, NNReal.coe_mk, ENNReal.some_eq_coe, sub_neg_eq_add]
state_before: case intro.intro.intro.intro.intro.h
α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ ↑s (i ∩ k) + ↑s (iᶜ ∩ k) = ↑s k
state_after: α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ Disjoint (i ∩ k) (iᶜ ∩ k)
tactic: rw [← of_union _ (MeasurableSet.inter hi₁ hk) (MeasurableSet.inter hi₁.compl hk),
    Set.inter_comm i, Set.inter_comm iᶜ, Set.inter_union_compl _ _]
state_before: α : Type u_1
β : Type u_2
inst✝² : MeasurableSpace α
s✝ : SignedMeasure α
μ ν : Measure α
inst✝¹ : IsFiniteMeasure μ
inst✝ : IsFiniteMeasure ν
s : SignedMeasure α
i : Set α
hi₁ : MeasurableSet i
hi₂ : VectorMeasure.restrict 0 i ≤ VectorMeasure.restrict s i
hi₃ : VectorMeasure.restrict s iᶜ ≤ VectorMeasure.restrict 0 iᶜ
hμ : s.toJordanDecomposition.posPart = s.toMeasureOfZeroLE i hi₁ hi₂
hν : s.toJordanDecomposition.negPart = s.toMeasureOfLEZero iᶜ ⋯ hi₃
k : Set α
hk : MeasurableSet k
⊢ Disjoint (i ∩ k) (iᶜ ∩ k)
state_after: no goals
tactic: exact (disjoint_compl_right.inf_left _).inf_right _