Theorem: BoxIntegral.IntegrationParams.biUnionTagged_memBaseSet
File: Mathlib/Analysis/BoxIntegral/Partition/Filter.lean

tactic: refine ⟨TaggedPrepartition.isSubordinate_biUnionTagged.2 fun J hJ => (h J hJ).1,
  fun hH => TaggedPrepartition.isHenstock_biUnionTagged.2 fun J hJ => (h J hJ).2 hH,
  fun hD => ?_, fun hD => ?_⟩
state_before: ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
⊢ l.MemBaseSet I c r (π.biUnionTagged πi)
state_after: case refine_1
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ (π.biUnionTagged πi).distortion ≤ c

case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ∃ π', π'.iUnion = ↑I \ (π.biUnionTagged πi).iUnion ∧ π'.distortion ≤ c

tactic: rw [Prepartition.distortion_biUnionTagged, Finset.sup_le_iff]
state_before: case refine_1
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ (π.biUnionTagged πi).distortion ≤ c
state_after: case refine_1
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ∀ b ∈ π.boxes, (πi b).distortion ≤ c

tactic: exact fun J hJ => (h J hJ).3 hD
state_before: case refine_1
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ∀ b ∈ π.boxes, (πi b).distortion ≤ c
state_after: no goals

tactic: refine ⟨_, ?_, hc hD⟩
state_before: case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ∃ π', π'.iUnion = ↑I \ (π.biUnionTagged πi).iUnion ∧ π'.distortion ≤ c
state_after: case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ π.compl.iUnion = ↑I \ (π.biUnionTagged πi).iUnion

tactic: rw [π.iUnion_compl, ← π.iUnion_biUnion_partition hp]
state_before: case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ π.compl.iUnion = ↑I \ (π.biUnionTagged πi).iUnion
state_after: case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ↑I \ (π.biUnion fun J => (πi J).toPrepartition).iUnion = ↑I \ (π.biUnionTagged πi).iUnion

tactic: rfl
state_before: case refine_2
ι : Type u_1
inst✝ : Fintype ι
I J : Box ι
c c₁ c₂ : ℝ≥0
r r₁ r₂ : (ι → ℝ) → ↑(Set.Ioi 0)
π✝ π₁ π₂ : TaggedPrepartition I
l l₁ l₂ : IntegrationParams
π : Prepartition I
πi : (J : Box ι) → TaggedPrepartition J
h : ∀ J ∈ π, l.MemBaseSet J c r (πi J)
hp : ∀ J ∈ π, (πi J).IsPartition
hc : l.bDistortion = true → π.compl.distortion ≤ c
hD : l.bDistortion = true
⊢ ↑I \ (π.biUnion fun J => (πi J).toPrepartition).iUnion = ↑I \ (π.biUnionTagged πi).iUnion
state_after: no goals