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Theorem itg1climres 23387
Description: Restricting the simple function 𝐹 to the increasing sequence 𝐴(𝑛) of measurable sets whose union is yields a sequence of simple functions whose integrals approach the integral of 𝐹. (Contributed by Mario Carneiro, 15-Aug-2014.)
Hypotheses
Ref Expression
itg1climres.1 (𝜑𝐴:ℕ⟶dom vol)
itg1climres.2 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)))
itg1climres.3 (𝜑 ran 𝐴 = ℝ)
itg1climres.4 (𝜑𝐹 ∈ dom ∫1)
itg1climres.5 𝐺 = (𝑥 ∈ ℝ ↦ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
Assertion
Ref Expression
itg1climres (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ⇝ (∫1𝐹))
Distinct variable groups:   𝑥,𝑛,𝐴   𝑛,𝐹,𝑥   𝜑,𝑛,𝑥
Allowed substitution hints:   𝐺(𝑥,𝑛)

Proof of Theorem itg1climres
Dummy variables 𝑗 𝑦 𝑧 𝑘 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nnuz 11667 . . 3 ℕ = (ℤ‘1)
2 1zzd 11352 . . 3 (𝜑 → 1 ∈ ℤ)
3 itg1climres.4 . . . . 5 (𝜑𝐹 ∈ dom ∫1)
4 i1frn 23350 . . . . 5 (𝐹 ∈ dom ∫1 → ran 𝐹 ∈ Fin)
53, 4syl 17 . . . 4 (𝜑 → ran 𝐹 ∈ Fin)
6 difss 3715 . . . 4 (ran 𝐹 ∖ {0}) ⊆ ran 𝐹
7 ssfi 8124 . . . 4 ((ran 𝐹 ∈ Fin ∧ (ran 𝐹 ∖ {0}) ⊆ ran 𝐹) → (ran 𝐹 ∖ {0}) ∈ Fin)
85, 6, 7sylancl 693 . . 3 (𝜑 → (ran 𝐹 ∖ {0}) ∈ Fin)
9 1zzd 11352 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 1 ∈ ℤ)
10 i1fima 23351 . . . . . . . . . . . 12 (𝐹 ∈ dom ∫1 → (𝐹 “ {𝑘}) ∈ dom vol)
113, 10syl 17 . . . . . . . . . . 11 (𝜑 → (𝐹 “ {𝑘}) ∈ dom vol)
1211ad2antrr 761 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐹 “ {𝑘}) ∈ dom vol)
13 itg1climres.1 . . . . . . . . . . . 12 (𝜑𝐴:ℕ⟶dom vol)
1413ffvelrnda 6315 . . . . . . . . . . 11 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ∈ dom vol)
1514adantlr 750 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ∈ dom vol)
16 inmbl 23217 . . . . . . . . . 10 (((𝐹 “ {𝑘}) ∈ dom vol ∧ (𝐴𝑛) ∈ dom vol) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ∈ dom vol)
1712, 15, 16syl2anc 692 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ∈ dom vol)
18 mblvol 23205 . . . . . . . . 9 (((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ∈ dom vol → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
1917, 18syl 17 . . . . . . . 8 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
20 inss1 3811 . . . . . . . . . 10 ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘})
2120a1i 11 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}))
22 mblss 23206 . . . . . . . . . 10 ((𝐹 “ {𝑘}) ∈ dom vol → (𝐹 “ {𝑘}) ⊆ ℝ)
2312, 22syl 17 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐹 “ {𝑘}) ⊆ ℝ)
24 mblvol 23205 . . . . . . . . . . 11 ((𝐹 “ {𝑘}) ∈ dom vol → (vol‘(𝐹 “ {𝑘})) = (vol*‘(𝐹 “ {𝑘})))
2512, 24syl 17 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘(𝐹 “ {𝑘})) = (vol*‘(𝐹 “ {𝑘})))
26 i1fima2sn 23353 . . . . . . . . . . . 12 ((𝐹 ∈ dom ∫1𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
273, 26sylan 488 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
2827adantr 481 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
2925, 28eqeltrrd 2699 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘(𝐹 “ {𝑘})) ∈ ℝ)
30 ovolsscl 23161 . . . . . . . . 9 ((((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}) ∧ (𝐹 “ {𝑘}) ⊆ ℝ ∧ (vol*‘(𝐹 “ {𝑘})) ∈ ℝ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
3121, 23, 29, 30syl3anc 1323 . . . . . . . 8 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
3219, 31eqeltrd 2698 . . . . . . 7 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
33 eqid 2621 . . . . . . 7 (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
3432, 33fmptd 6340 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ)
35 itg1climres.2 . . . . . . . . . . . . 13 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)))
3635adantlr 750 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)))
37 sslin 3817 . . . . . . . . . . . 12 ((𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))))
3836, 37syl 17 . . . . . . . . . . 11 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))))
3913adantr 481 . . . . . . . . . . . . . 14 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐴:ℕ⟶dom vol)
40 peano2nn 10976 . . . . . . . . . . . . . 14 (𝑛 ∈ ℕ → (𝑛 + 1) ∈ ℕ)
41 ffvelrn 6313 . . . . . . . . . . . . . 14 ((𝐴:ℕ⟶dom vol ∧ (𝑛 + 1) ∈ ℕ) → (𝐴‘(𝑛 + 1)) ∈ dom vol)
4239, 40, 41syl2an 494 . . . . . . . . . . . . 13 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴‘(𝑛 + 1)) ∈ dom vol)
43 inmbl 23217 . . . . . . . . . . . . 13 (((𝐹 “ {𝑘}) ∈ dom vol ∧ (𝐴‘(𝑛 + 1)) ∈ dom vol) → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol)
4412, 42, 43syl2anc 692 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol)
45 mblss 23206 . . . . . . . . . . . 12 (((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ⊆ ℝ)
4644, 45syl 17 . . . . . . . . . . 11 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ⊆ ℝ)
47 ovolss 23160 . . . . . . . . . . 11 ((((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∧ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ⊆ ℝ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
4838, 46, 47syl2anc 692 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
49 mblvol 23205 . . . . . . . . . . 11 (((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) = (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
5044, 49syl 17 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) = (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
5148, 19, 503brtr4d 4645 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
5251ralrimiva 2960 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
53 fveq2 6148 . . . . . . . . . . . . . 14 (𝑛 = 𝑗 → (𝐴𝑛) = (𝐴𝑗))
5453ineq2d 3792 . . . . . . . . . . . . 13 (𝑛 = 𝑗 → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))
5554fveq2d 6152 . . . . . . . . . . . 12 (𝑛 = 𝑗 → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))))
56 fvex 6158 . . . . . . . . . . . 12 (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ∈ V
5755, 33, 56fvmpt 6239 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))))
58 peano2nn 10976 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → (𝑗 + 1) ∈ ℕ)
59 fveq2 6148 . . . . . . . . . . . . . . 15 (𝑛 = (𝑗 + 1) → (𝐴𝑛) = (𝐴‘(𝑗 + 1)))
6059ineq2d 3792 . . . . . . . . . . . . . 14 (𝑛 = (𝑗 + 1) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
6160fveq2d 6152 . . . . . . . . . . . . 13 (𝑛 = (𝑗 + 1) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
62 fvex 6158 . . . . . . . . . . . . 13 (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))) ∈ V
6361, 33, 62fvmpt 6239 . . . . . . . . . . . 12 ((𝑗 + 1) ∈ ℕ → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
6458, 63syl 17 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
6557, 64breq12d 4626 . . . . . . . . . 10 (𝑗 ∈ ℕ → (((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))))
6665ralbiia 2973 . . . . . . . . 9 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)) ↔ ∀𝑗 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
67 oveq1 6611 . . . . . . . . . . . . . 14 (𝑛 = 𝑗 → (𝑛 + 1) = (𝑗 + 1))
6867fveq2d 6152 . . . . . . . . . . . . 13 (𝑛 = 𝑗 → (𝐴‘(𝑛 + 1)) = (𝐴‘(𝑗 + 1)))
6968ineq2d 3792 . . . . . . . . . . . 12 (𝑛 = 𝑗 → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
7069fveq2d 6152 . . . . . . . . . . 11 (𝑛 = 𝑗 → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
7155, 70breq12d 4626 . . . . . . . . . 10 (𝑛 = 𝑗 → ((vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))))
7271cbvralv 3159 . . . . . . . . 9 (∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) ↔ ∀𝑗 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
7366, 72bitr4i 267 . . . . . . . 8 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)) ↔ ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
7452, 73sylibr 224 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)))
7574r19.21bi 2927 . . . . . 6 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)))
76 ovolss 23160 . . . . . . . . . . 11 ((((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}) ∧ (𝐹 “ {𝑘}) ⊆ ℝ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘(𝐹 “ {𝑘})))
7720, 23, 76sylancr 694 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘(𝐹 “ {𝑘})))
7877, 19, 253brtr4d 4645 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})))
7978ralrimiva 2960 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})))
8057breq1d 4623 . . . . . . . . . 10 (𝑗 ∈ ℕ → (((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘}))))
8180ralbiia 2973 . . . . . . . . 9 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})) ↔ ∀𝑗 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘})))
8255breq1d 4623 . . . . . . . . . 10 (𝑛 = 𝑗 → ((vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘}))))
8382cbvralv 3159 . . . . . . . . 9 (∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})) ↔ ∀𝑗 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘})))
8481, 83bitr4i 267 . . . . . . . 8 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})) ↔ ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})))
8579, 84sylibr 224 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})))
86 breq2 4617 . . . . . . . . 9 (𝑥 = (vol‘(𝐹 “ {𝑘})) → (((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥 ↔ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘}))))
8786ralbidv 2980 . . . . . . . 8 (𝑥 = (vol‘(𝐹 “ {𝑘})) → (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥 ↔ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘}))))
8887rspcev 3295 . . . . . . 7 (((vol‘(𝐹 “ {𝑘})) ∈ ℝ ∧ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘}))) → ∃𝑥 ∈ ℝ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥)
8927, 85, 88syl2anc 692 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∃𝑥 ∈ ℝ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥)
901, 9, 34, 75, 89climsup 14334 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⇝ sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
91 eqid 2621 . . . . . . . 8 (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))
9217, 91fmptd 6340 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))):ℕ⟶dom vol)
9338ralrimiva 2960 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))))
94 fvex 6158 . . . . . . . . . . . . 13 (𝐴𝑗) ∈ V
9594inex2 4760 . . . . . . . . . . . 12 ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ∈ V
9654, 91, 95fvmpt 6239 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))
97 fvex 6158 . . . . . . . . . . . . . 14 (𝐴‘(𝑗 + 1)) ∈ V
9897inex2 4760 . . . . . . . . . . . . 13 ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))) ∈ V
9960, 91, 98fvmpt 6239 . . . . . . . . . . . 12 ((𝑗 + 1) ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
10058, 99syl 17 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
10196, 100sseq12d 3613 . . . . . . . . . 10 (𝑗 ∈ ℕ → (((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) ⊆ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)) ↔ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
102101ralbiia 2973 . . . . . . . . 9 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) ⊆ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)) ↔ ∀𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
10354, 69sseq12d 3613 . . . . . . . . . 10 (𝑛 = 𝑗 → (((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ↔ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
104103cbvralv 3159 . . . . . . . . 9 (∀𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ↔ ∀𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
105102, 104bitr4i 267 . . . . . . . 8 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) ⊆ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)) ↔ ∀𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))))
10693, 105sylibr 224 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) ⊆ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1)))
107 volsup 23231 . . . . . . 7 (((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))):ℕ⟶dom vol ∧ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) ⊆ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘(𝑗 + 1))) → (vol‘ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = sup((vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ))
10892, 106, 107syl2anc 692 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = sup((vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ))
10996iuneq2i 4505 . . . . . . . . . 10 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = 𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗))
11054cbviunv 4525 . . . . . . . . . 10 𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = 𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗))
111 iunin2 4550 . . . . . . . . . 10 𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛))
112109, 110, 1113eqtr2i 2649 . . . . . . . . 9 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛))
113 ffn 6002 . . . . . . . . . . . . . 14 (𝐴:ℕ⟶dom vol → 𝐴 Fn ℕ)
114 fniunfv 6459 . . . . . . . . . . . . . 14 (𝐴 Fn ℕ → 𝑛 ∈ ℕ (𝐴𝑛) = ran 𝐴)
11513, 113, 1143syl 18 . . . . . . . . . . . . 13 (𝜑 𝑛 ∈ ℕ (𝐴𝑛) = ran 𝐴)
116 itg1climres.3 . . . . . . . . . . . . 13 (𝜑 ran 𝐴 = ℝ)
117115, 116eqtrd 2655 . . . . . . . . . . . 12 (𝜑 𝑛 ∈ ℕ (𝐴𝑛) = ℝ)
118117adantr 481 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑛 ∈ ℕ (𝐴𝑛) = ℝ)
119118ineq2d 3792 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ ℝ))
12011adantr 481 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) ∈ dom vol)
121120, 22syl 17 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) ⊆ ℝ)
122 df-ss 3569 . . . . . . . . . . 11 ((𝐹 “ {𝑘}) ⊆ ℝ ↔ ((𝐹 “ {𝑘}) ∩ ℝ) = (𝐹 “ {𝑘}))
123121, 122sylib 208 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ ℝ) = (𝐹 “ {𝑘}))
124119, 123eqtrd 2655 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛)) = (𝐹 “ {𝑘}))
125112, 124syl5eq 2667 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = (𝐹 “ {𝑘}))
126 ffn 6002 . . . . . . . . 9 ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))):ℕ⟶dom vol → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) Fn ℕ)
127 fniunfv 6459 . . . . . . . . 9 ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) Fn ℕ → 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
12892, 126, 1273syl 18 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
129125, 128eqtr3d 2657 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) = ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
130129fveq2d 6152 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) = (vol‘ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
131 frn 6010 . . . . . . . . 9 ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ → ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⊆ ℝ)
13234, 131syl 17 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⊆ ℝ)
133 fdm 6008 . . . . . . . . . . 11 ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ → dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ℕ)
13434, 133syl 17 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ℕ)
135 1nn 10975 . . . . . . . . . . 11 1 ∈ ℕ
136 ne0i 3897 . . . . . . . . . . 11 (1 ∈ ℕ → ℕ ≠ ∅)
137135, 136mp1i 13 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ℕ ≠ ∅)
138134, 137eqnetrd 2857 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅)
139 dm0rn0 5302 . . . . . . . . . 10 (dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ∅ ↔ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ∅)
140139necon3bii 2842 . . . . . . . . 9 (dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅ ↔ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅)
141138, 140sylib 208 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅)
142 ffn 6002 . . . . . . . . . . 11 ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) Fn ℕ)
143 breq1 4616 . . . . . . . . . . . 12 (𝑧 = ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) → (𝑧𝑥 ↔ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥))
144143ralrn 6318 . . . . . . . . . . 11 ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) Fn ℕ → (∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))𝑧𝑥 ↔ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥))
14534, 142, 1443syl 18 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))𝑧𝑥 ↔ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥))
146145rexbidv 3045 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (∃𝑥 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))𝑧𝑥 ↔ ∃𝑥 ∈ ℝ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥))
14789, 146mpbird 247 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))𝑧𝑥)
148 supxrre 12100 . . . . . . . 8 ((ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⊆ ℝ ∧ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))𝑧𝑥) → sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ) = sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
149132, 141, 147, 148syl3anc 1323 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ) = sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
150 rnco2 5601 . . . . . . . . 9 ran (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
151 eqidd 2622 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
152 volf 23204 . . . . . . . . . . . . 13 vol:dom vol⟶(0[,]+∞)
153152a1i 11 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → vol:dom vol⟶(0[,]+∞))
154153feqmptd 6206 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → vol = (𝑦 ∈ dom vol ↦ (vol‘𝑦)))
155 fveq2 6148 . . . . . . . . . . 11 (𝑦 = ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) → (vol‘𝑦) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
15617, 151, 154, 155fmptco 6351 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
157156rneqd 5313 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
158150, 157syl5reqr 2670 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
159158supeq1d 8296 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ) = sup((vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ))
160149, 159eqtr3d 2657 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ) = sup((vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ))
161108, 130, 1603eqtr4d 2665 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) = sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
16290, 161breqtrrd 4641 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⇝ (vol‘(𝐹 “ {𝑘})))
163 i1ff 23349 . . . . . . . 8 (𝐹 ∈ dom ∫1𝐹:ℝ⟶ℝ)
164 frn 6010 . . . . . . . 8 (𝐹:ℝ⟶ℝ → ran 𝐹 ⊆ ℝ)
1653, 163, 1643syl 18 . . . . . . 7 (𝜑 → ran 𝐹 ⊆ ℝ)
166165ssdifssd 3726 . . . . . 6 (𝜑 → (ran 𝐹 ∖ {0}) ⊆ ℝ)
167166sselda 3583 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑘 ∈ ℝ)
168167recnd 10012 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑘 ∈ ℂ)
169 nnex 10970 . . . . . 6 ℕ ∈ V
170169mptex 6440 . . . . 5 (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) ∈ V
171170a1i 11 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) ∈ V)
17234ffvelrnda 6315 . . . . 5 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ∈ ℝ)
173172recnd 10012 . . . 4 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ∈ ℂ)
17455oveq2d 6620 . . . . . . 7 (𝑛 = 𝑗 → (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
175 eqid 2621 . . . . . . 7 (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) = (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
176 ovex 6632 . . . . . . 7 (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))) ∈ V
177174, 175, 176fvmpt 6239 . . . . . 6 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
17857oveq2d 6620 . . . . . 6 (𝑗 ∈ ℕ → (𝑘 · ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗)) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
179177, 178eqtr4d 2658 . . . . 5 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = (𝑘 · ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗)))
180179adantl 482 . . . 4 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = (𝑘 · ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗)))
1811, 9, 162, 168, 171, 173, 180climmulc2 14301 . . 3 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) ⇝ (𝑘 · (vol‘(𝐹 “ {𝑘}))))
182169mptex 6440 . . . 4 (𝑛 ∈ ℕ ↦ (∫1𝐺)) ∈ V
183182a1i 11 . . 3 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ∈ V)
184167adantr 481 . . . . . . . 8 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → 𝑘 ∈ ℝ)
185184, 32remulcld 10014 . . . . . . 7 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ∈ ℝ)
186185, 175fmptd 6340 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))):ℕ⟶ℝ)
187186ffvelrnda 6315 . . . . 5 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℝ)
188187recnd 10012 . . . 4 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℂ)
189188anasss 678 . . 3 ((𝜑 ∧ (𝑘 ∈ (ran 𝐹 ∖ {0}) ∧ 𝑗 ∈ ℕ)) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℂ)
1903adantr 481 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → 𝐹 ∈ dom ∫1)
191 itg1climres.5 . . . . . . . . . 10 𝐺 = (𝑥 ∈ ℝ ↦ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
192191i1fres 23378 . . . . . . . . 9 ((𝐹 ∈ dom ∫1 ∧ (𝐴𝑛) ∈ dom vol) → 𝐺 ∈ dom ∫1)
193190, 14, 192syl2anc 692 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → 𝐺 ∈ dom ∫1)
1948adantr 481 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (ran 𝐹 ∖ {0}) ∈ Fin)
195 ffn 6002 . . . . . . . . . . . . . 14 (𝐹:ℝ⟶ℝ → 𝐹 Fn ℝ)
1963, 163, 1953syl 18 . . . . . . . . . . . . 13 (𝜑𝐹 Fn ℝ)
197196adantr 481 . . . . . . . . . . . 12 ((𝜑𝑛 ∈ ℕ) → 𝐹 Fn ℝ)
198 fnfvelrn 6312 . . . . . . . . . . . 12 ((𝐹 Fn ℝ ∧ 𝑥 ∈ ℝ) → (𝐹𝑥) ∈ ran 𝐹)
199197, 198sylan 488 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → (𝐹𝑥) ∈ ran 𝐹)
200 i1f0rn 23355 . . . . . . . . . . . . 13 (𝐹 ∈ dom ∫1 → 0 ∈ ran 𝐹)
2013, 200syl 17 . . . . . . . . . . . 12 (𝜑 → 0 ∈ ran 𝐹)
202201ad2antrr 761 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → 0 ∈ ran 𝐹)
203199, 202ifcld 4103 . . . . . . . . . 10 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ ran 𝐹)
204203, 191fmptd 6340 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → 𝐺:ℝ⟶ran 𝐹)
205 frn 6010 . . . . . . . . 9 (𝐺:ℝ⟶ran 𝐹 → ran 𝐺 ⊆ ran 𝐹)
206 ssdif 3723 . . . . . . . . 9 (ran 𝐺 ⊆ ran 𝐹 → (ran 𝐺 ∖ {0}) ⊆ (ran 𝐹 ∖ {0}))
207204, 205, 2063syl 18 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (ran 𝐺 ∖ {0}) ⊆ (ran 𝐹 ∖ {0}))
208165adantr 481 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → ran 𝐹 ⊆ ℝ)
209208ssdifd 3724 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (ran 𝐹 ∖ {0}) ⊆ (ℝ ∖ {0}))
210 itg1val2 23357 . . . . . . . 8 ((𝐺 ∈ dom ∫1 ∧ ((ran 𝐹 ∖ {0}) ∈ Fin ∧ (ran 𝐺 ∖ {0}) ⊆ (ran 𝐹 ∖ {0}) ∧ (ran 𝐹 ∖ {0}) ⊆ (ℝ ∖ {0}))) → (∫1𝐺) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐺 “ {𝑘}))))
211193, 194, 207, 209, 210syl13anc 1325 . . . . . . 7 ((𝜑𝑛 ∈ ℕ) → (∫1𝐺) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐺 “ {𝑘}))))
212 fvex 6158 . . . . . . . . . . . . . . . . . . . . 21 (𝐹𝑥) ∈ V
213 c0ex 9978 . . . . . . . . . . . . . . . . . . . . 21 0 ∈ V
214212, 213ifex 4128 . . . . . . . . . . . . . . . . . . . 20 if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ V
215191fvmpt2 6248 . . . . . . . . . . . . . . . . . . . 20 ((𝑥 ∈ ℝ ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ V) → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
216214, 215mpan2 706 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ ℝ → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
217216adantl 482 . . . . . . . . . . . . . . . . . 18 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
218217eqeq1d 2623 . . . . . . . . . . . . . . . . 17 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → ((𝐺𝑥) = 𝑘 ↔ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘))
219 eldifsni 4289 . . . . . . . . . . . . . . . . . . . . 21 (𝑘 ∈ (ran 𝐹 ∖ {0}) → 𝑘 ≠ 0)
220219ad2antlr 762 . . . . . . . . . . . . . . . . . . . 20 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → 𝑘 ≠ 0)
221 neeq1 2852 . . . . . . . . . . . . . . . . . . . 20 (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘 → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ≠ 0 ↔ 𝑘 ≠ 0))
222220, 221syl5ibrcom 237 . . . . . . . . . . . . . . . . . . 19 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘 → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ≠ 0))
223 iffalse 4067 . . . . . . . . . . . . . . . . . . . 20 𝑥 ∈ (𝐴𝑛) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 0)
224223necon1ai 2817 . . . . . . . . . . . . . . . . . . 19 (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ≠ 0 → 𝑥 ∈ (𝐴𝑛))
225222, 224syl6 35 . . . . . . . . . . . . . . . . . 18 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘𝑥 ∈ (𝐴𝑛)))
226225pm4.71rd 666 . . . . . . . . . . . . . . . . 17 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘 ↔ (𝑥 ∈ (𝐴𝑛) ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘)))
227218, 226bitrd 268 . . . . . . . . . . . . . . . 16 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → ((𝐺𝑥) = 𝑘 ↔ (𝑥 ∈ (𝐴𝑛) ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘)))
228 iftrue 4064 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ (𝐴𝑛) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = (𝐹𝑥))
229228eqeq1d 2623 . . . . . . . . . . . . . . . . . 18 (𝑥 ∈ (𝐴𝑛) → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘 ↔ (𝐹𝑥) = 𝑘))
230229pm5.32i 668 . . . . . . . . . . . . . . . . 17 ((𝑥 ∈ (𝐴𝑛) ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘) ↔ (𝑥 ∈ (𝐴𝑛) ∧ (𝐹𝑥) = 𝑘))
231 ancom 466 . . . . . . . . . . . . . . . . 17 ((𝑥 ∈ (𝐴𝑛) ∧ (𝐹𝑥) = 𝑘) ↔ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛)))
232230, 231bitri 264 . . . . . . . . . . . . . . . 16 ((𝑥 ∈ (𝐴𝑛) ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘) ↔ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛)))
233227, 232syl6bb 276 . . . . . . . . . . . . . . 15 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → ((𝐺𝑥) = 𝑘 ↔ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛))))
234233pm5.32da 672 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝑥 ∈ ℝ ∧ (𝐺𝑥) = 𝑘) ↔ (𝑥 ∈ ℝ ∧ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛)))))
235 anass 680 . . . . . . . . . . . . . 14 (((𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘) ∧ 𝑥 ∈ (𝐴𝑛)) ↔ (𝑥 ∈ ℝ ∧ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛))))
236234, 235syl6bbr 278 . . . . . . . . . . . . 13 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝑥 ∈ ℝ ∧ (𝐺𝑥) = 𝑘) ↔ ((𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘) ∧ 𝑥 ∈ (𝐴𝑛))))
237 i1ff 23349 . . . . . . . . . . . . . . . 16 (𝐺 ∈ dom ∫1𝐺:ℝ⟶ℝ)
238 ffn 6002 . . . . . . . . . . . . . . . 16 (𝐺:ℝ⟶ℝ → 𝐺 Fn ℝ)
239193, 237, 2383syl 18 . . . . . . . . . . . . . . 15 ((𝜑𝑛 ∈ ℕ) → 𝐺 Fn ℝ)
240239adantr 481 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐺 Fn ℝ)
241 fniniseg 6294 . . . . . . . . . . . . . 14 (𝐺 Fn ℝ → (𝑥 ∈ (𝐺 “ {𝑘}) ↔ (𝑥 ∈ ℝ ∧ (𝐺𝑥) = 𝑘)))
242240, 241syl 17 . . . . . . . . . . . . 13 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑥 ∈ (𝐺 “ {𝑘}) ↔ (𝑥 ∈ ℝ ∧ (𝐺𝑥) = 𝑘)))
243 elin 3774 . . . . . . . . . . . . . 14 (𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ↔ (𝑥 ∈ (𝐹 “ {𝑘}) ∧ 𝑥 ∈ (𝐴𝑛)))
244197adantr 481 . . . . . . . . . . . . . . . 16 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐹 Fn ℝ)
245 fniniseg 6294 . . . . . . . . . . . . . . . 16 (𝐹 Fn ℝ → (𝑥 ∈ (𝐹 “ {𝑘}) ↔ (𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘)))
246244, 245syl 17 . . . . . . . . . . . . . . 15 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑥 ∈ (𝐹 “ {𝑘}) ↔ (𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘)))
247246anbi1d 740 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝑥 ∈ (𝐹 “ {𝑘}) ∧ 𝑥 ∈ (𝐴𝑛)) ↔ ((𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘) ∧ 𝑥 ∈ (𝐴𝑛))))
248243, 247syl5bb 272 . . . . . . . . . . . . 13 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ↔ ((𝑥 ∈ ℝ ∧ (𝐹𝑥) = 𝑘) ∧ 𝑥 ∈ (𝐴𝑛))))
249236, 242, 2483bitr4d 300 . . . . . . . . . . . 12 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑥 ∈ (𝐺 “ {𝑘}) ↔ 𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
250249alrimiv 1852 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑥(𝑥 ∈ (𝐺 “ {𝑘}) ↔ 𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
251 nfmpt1 4707 . . . . . . . . . . . . . . 15 𝑥(𝑥 ∈ ℝ ↦ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
252191, 251nfcxfr 2759 . . . . . . . . . . . . . 14 𝑥𝐺
253252nfcnv 5261 . . . . . . . . . . . . 13 𝑥𝐺
254 nfcv 2761 . . . . . . . . . . . . 13 𝑥{𝑘}
255253, 254nfima 5433 . . . . . . . . . . . 12 𝑥(𝐺 “ {𝑘})
256 nfcv 2761 . . . . . . . . . . . 12 𝑥((𝐹 “ {𝑘}) ∩ (𝐴𝑛))
257255, 256cleqf 2786 . . . . . . . . . . 11 ((𝐺 “ {𝑘}) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ↔ ∀𝑥(𝑥 ∈ (𝐺 “ {𝑘}) ↔ 𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
258250, 257sylibr 224 . . . . . . . . . 10 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐺 “ {𝑘}) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))
259258fveq2d 6152 . . . . . . . . 9 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐺 “ {𝑘})) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
260259oveq2d 6620 . . . . . . . 8 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑘 · (vol‘(𝐺 “ {𝑘}))) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
261260sumeq2dv 14367 . . . . . . 7 ((𝜑𝑛 ∈ ℕ) → Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐺 “ {𝑘}))) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
262211, 261eqtrd 2655 . . . . . 6 ((𝜑𝑛 ∈ ℕ) → (∫1𝐺) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
263262mpteq2dva 4704 . . . . 5 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))))
264263fveq1d 6150 . . . 4 (𝜑 → ((𝑛 ∈ ℕ ↦ (∫1𝐺))‘𝑗) = ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗))
265174sumeq2sdv 14368 . . . . . 6 (𝑛 = 𝑗 → Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
266 eqid 2621 . . . . . 6 (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
267 sumex 14352 . . . . . 6 Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))) ∈ V
268265, 266, 267fvmpt 6239 . . . . 5 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
269177sumeq2sdv 14368 . . . . 5 (𝑗 ∈ ℕ → Σ𝑘 ∈ (ran 𝐹 ∖ {0})((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
270268, 269eqtr4d 2658 . . . 4 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗))
271264, 270sylan9eq 2675 . . 3 ((𝜑𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (∫1𝐺))‘𝑗) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗))
2721, 2, 8, 181, 183, 189, 271climfsum 14479 . 2 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ⇝ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐹 “ {𝑘}))))
273 itg1val 23356 . . 3 (𝐹 ∈ dom ∫1 → (∫1𝐹) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐹 “ {𝑘}))))
2743, 273syl 17 . 2 (𝜑 → (∫1𝐹) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐹 “ {𝑘}))))
275272, 274breqtrrd 4641 1 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ⇝ (∫1𝐹))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  wal 1478   = wceq 1480  wcel 1987  wne 2790  wral 2907  wrex 2908  Vcvv 3186  cdif 3552  cin 3554  wss 3555  c0 3891  ifcif 4058  {csn 4148   cuni 4402   ciun 4485   class class class wbr 4613  cmpt 4673  ccnv 5073  dom cdm 5074  ran crn 5075  cima 5077  ccom 5078   Fn wfn 5842  wf 5843  cfv 5847  (class class class)co 6604  Fincfn 7899  supcsup 8290  cc 9878  cr 9879  0cc0 9880  1c1 9881   + caddc 9883   · cmul 9885  +∞cpnf 10015  *cxr 10017   < clt 10018  cle 10019  cn 10964  [,]cicc 12120  cli 14149  Σcsu 14350  vol*covol 23138  volcvol 23139  1citg1 23290
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902  ax-inf2 8482  ax-cc 9201  ax-cnex 9936  ax-resscn 9937  ax-1cn 9938  ax-icn 9939  ax-addcl 9940  ax-addrcl 9941  ax-mulcl 9942  ax-mulrcl 9943  ax-mulcom 9944  ax-addass 9945  ax-mulass 9946  ax-distr 9947  ax-i2m1 9948  ax-1ne0 9949  ax-1rid 9950  ax-rnegex 9951  ax-rrecex 9952  ax-cnre 9953  ax-pre-lttri 9954  ax-pre-lttrn 9955  ax-pre-ltadd 9956  ax-pre-mulgt0 9957  ax-pre-sup 9958  ax-addf 9959
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-fal 1486  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-nel 2894  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-disj 4584  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-se 5034  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-isom 5856  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-of 6850  df-om 7013  df-1st 7113  df-2nd 7114  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-1o 7505  df-2o 7506  df-oadd 7509  df-er 7687  df-map 7804  df-pm 7805  df-en 7900  df-dom 7901  df-sdom 7902  df-fin 7903  df-fi 8261  df-sup 8292  df-inf 8293  df-oi 8359  df-card 8709  df-cda 8934  df-pnf 10020  df-mnf 10021  df-xr 10022  df-ltxr 10023  df-le 10024  df-sub 10212  df-neg 10213  df-div 10629  df-nn 10965  df-2 11023  df-3 11024  df-n0 11237  df-z 11322  df-uz 11632  df-q 11733  df-rp 11777  df-xneg 11890  df-xadd 11891  df-xmul 11892  df-ioo 12121  df-ico 12123  df-icc 12124  df-fz 12269  df-fzo 12407  df-fl 12533  df-seq 12742  df-exp 12801  df-hash 13058  df-cj 13773  df-re 13774  df-im 13775  df-sqrt 13909  df-abs 13910  df-clim 14153  df-rlim 14154  df-sum 14351  df-rest 16004  df-topgen 16025  df-psmet 19657  df-xmet 19658  df-met 19659  df-bl 19660  df-mopn 19661  df-top 20621  df-bases 20622  df-topon 20623  df-cmp 21100  df-ovol 23140  df-vol 23141  df-mbf 23294  df-itg1 23295
This theorem is referenced by:  itg2monolem1  23423
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