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Theorem itg1climres 23601
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 11837 . . 3 ℕ = (ℤ‘1)
2 1zzd 11521 . . 3 (𝜑 → 1 ∈ ℤ)
3 itg1climres.4 . . . . 5 (𝜑𝐹 ∈ dom ∫1)
4 i1frn 23564 . . . . 5 (𝐹 ∈ dom ∫1 → ran 𝐹 ∈ Fin)
53, 4syl 17 . . . 4 (𝜑 → ran 𝐹 ∈ Fin)
6 difss 3845 . . . 4 (ran 𝐹 ∖ {0}) ⊆ ran 𝐹
7 ssfi 8296 . . . 4 ((ran 𝐹 ∈ Fin ∧ (ran 𝐹 ∖ {0}) ⊆ ran 𝐹) → (ran 𝐹 ∖ {0}) ∈ Fin)
85, 6, 7sylancl 697 . . 3 (𝜑 → (ran 𝐹 ∖ {0}) ∈ Fin)
9 1zzd 11521 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 1 ∈ ℤ)
10 i1fima 23565 . . . . . . . . . . . 12 (𝐹 ∈ dom ∫1 → (𝐹 “ {𝑘}) ∈ dom vol)
113, 10syl 17 . . . . . . . . . . 11 (𝜑 → (𝐹 “ {𝑘}) ∈ dom vol)
1211ad2antrr 764 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐹 “ {𝑘}) ∈ dom vol)
13 itg1climres.1 . . . . . . . . . . . 12 (𝜑𝐴:ℕ⟶dom vol)
1413ffvelrnda 6474 . . . . . . . . . . 11 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ∈ dom vol)
1514adantlr 753 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ∈ dom vol)
16 inmbl 23431 . . . . . . . . . 10 (((𝐹 “ {𝑘}) ∈ dom vol ∧ (𝐴𝑛) ∈ dom vol) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ∈ dom vol)
1712, 15, 16syl2anc 696 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ∈ dom vol)
18 mblvol 23419 . . . . . . . . 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 3941 . . . . . . . . . 10 ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘})
2120a1i 11 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}))
22 mblss 23420 . . . . . . . . . 10 ((𝐹 “ {𝑘}) ∈ dom vol → (𝐹 “ {𝑘}) ⊆ ℝ)
2312, 22syl 17 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐹 “ {𝑘}) ⊆ ℝ)
24 mblvol 23419 . . . . . . . . . . 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 23567 . . . . . . . . . . . 12 ((𝐹 ∈ dom ∫1𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
273, 26sylan 489 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
2827adantr 472 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘(𝐹 “ {𝑘})) ∈ ℝ)
2925, 28eqeltrrd 2804 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘(𝐹 “ {𝑘})) ∈ ℝ)
30 ovolsscl 23375 . . . . . . . . 9 ((((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}) ∧ (𝐹 “ {𝑘}) ⊆ ℝ ∧ (vol*‘(𝐹 “ {𝑘})) ∈ ℝ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
3121, 23, 29, 30syl3anc 1439 . . . . . . . 8 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
3219, 31eqeltrd 2803 . . . . . . 7 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ∈ ℝ)
33 eqid 2724 . . . . . . 7 (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
3432, 33fmptd 6500 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ)
35 itg1climres.2 . . . . . . . . . . . . 13 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)))
3635adantlr 753 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ (𝐴‘(𝑛 + 1)))
37 sslin 3947 . . . . . . . . . . . 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 472 . . . . . . . . . . . . . 14 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐴:ℕ⟶dom vol)
40 peano2nn 11145 . . . . . . . . . . . . . 14 (𝑛 ∈ ℕ → (𝑛 + 1) ∈ ℕ)
41 ffvelrn 6472 . . . . . . . . . . . . . 14 ((𝐴:ℕ⟶dom vol ∧ (𝑛 + 1) ∈ ℕ) → (𝐴‘(𝑛 + 1)) ∈ dom vol)
4239, 40, 41syl2an 495 . . . . . . . . . . . . 13 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝐴‘(𝑛 + 1)) ∈ dom vol)
43 inmbl 23431 . . . . . . . . . . . . 13 (((𝐹 “ {𝑘}) ∈ dom vol ∧ (𝐴‘(𝑛 + 1)) ∈ dom vol) → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol)
4412, 42, 43syl2anc 696 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ∈ dom vol)
45 mblss 23420 . . . . . . . . . . . 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 23374 . . . . . . . . . . 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 696 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
49 mblvol 23419 . . . . . . . . . . 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 4792 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
5251ralrimiva 3068 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))))
53 fveq2 6304 . . . . . . . . . . . . . 14 (𝑛 = 𝑗 → (𝐴𝑛) = (𝐴𝑗))
5453ineq2d 3922 . . . . . . . . . . . . 13 (𝑛 = 𝑗 → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))
5554fveq2d 6308 . . . . . . . . . . . 12 (𝑛 = 𝑗 → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))))
56 fvex 6314 . . . . . . . . . . . 12 (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ∈ V
5755, 33, 56fvmpt 6396 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))))
58 peano2nn 11145 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → (𝑗 + 1) ∈ ℕ)
59 fveq2 6304 . . . . . . . . . . . . . . 15 (𝑛 = (𝑗 + 1) → (𝐴𝑛) = (𝐴‘(𝑗 + 1)))
6059ineq2d 3922 . . . . . . . . . . . . . 14 (𝑛 = (𝑗 + 1) → ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
6160fveq2d 6308 . . . . . . . . . . . . 13 (𝑛 = (𝑗 + 1) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
62 fvex 6314 . . . . . . . . . . . . 13 (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))) ∈ V
6361, 33, 62fvmpt 6396 . . . . . . . . . . . 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 4773 . . . . . . . . . 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 3081 . . . . . . . . 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 6772 . . . . . . . . . . . . . 14 (𝑛 = 𝑗 → (𝑛 + 1) = (𝑗 + 1))
6867fveq2d 6308 . . . . . . . . . . . . 13 (𝑛 = 𝑗 → (𝐴‘(𝑛 + 1)) = (𝐴‘(𝑗 + 1)))
6968ineq2d 3922 . . . . . . . . . . . 12 (𝑛 = 𝑗 → ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) = ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))
7069fveq2d 6308 . . . . . . . . . . 11 (𝑛 = 𝑗 → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
7155, 70breq12d 4773 . . . . . . . . . 10 (𝑛 = 𝑗 → ((vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1)))) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))))))
7271cbvralv 3274 . . . . . . . . 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 3034 . . . . . 6 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘(𝑗 + 1)))
76 ovolss 23374 . . . . . . . . . . 11 ((((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ (𝐹 “ {𝑘}) ∧ (𝐹 “ {𝑘}) ⊆ ℝ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘(𝐹 “ {𝑘})))
7720, 23, 76sylancr 698 . . . . . . . . . 10 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol*‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol*‘(𝐹 “ {𝑘})))
7877, 19, 253brtr4d 4792 . . . . . . . . 9 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})))
7978ralrimiva 3068 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})))
8057breq1d 4770 . . . . . . . . . 10 (𝑗 ∈ ℕ → (((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘}))))
8180ralbiia 3081 . . . . . . . . 9 (∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘})) ↔ ∀𝑗 ∈ ℕ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘})))
8255breq1d 4770 . . . . . . . . . 10 (𝑛 = 𝑗 → ((vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) ≤ (vol‘(𝐹 “ {𝑘})) ↔ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗))) ≤ (vol‘(𝐹 “ {𝑘}))))
8382cbvralv 3274 . . . . . . . . 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 4764 . . . . . . . . 9 (𝑥 = (vol‘(𝐹 “ {𝑘})) → (((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥 ↔ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ (vol‘(𝐹 “ {𝑘}))))
8786ralbidv 3088 . . . . . . . 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 3413 . . . . . . 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 696 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∃𝑥 ∈ ℝ ∀𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥)
901, 9, 34, 75, 89climsup 14520 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⇝ sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
91 eqid 2724 . . . . . . . 8 (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))
9217, 91fmptd 6500 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))):ℕ⟶dom vol)
9338ralrimiva 3068 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))))
94 fvex 6314 . . . . . . . . . . . . 13 (𝐴𝑗) ∈ V
9594inex2 4908 . . . . . . . . . . . 12 ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ∈ V
9654, 91, 95fvmpt 6396 . . . . . . . . . . 11 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))
97 fvex 6314 . . . . . . . . . . . . . 14 (𝐴‘(𝑗 + 1)) ∈ V
9897inex2 4908 . . . . . . . . . . . . 13 ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1))) ∈ V
9960, 91, 98fvmpt 6396 . . . . . . . . . . . 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 3740 . . . . . . . . . 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 3081 . . . . . . . . 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 3740 . . . . . . . . . 10 (𝑛 = 𝑗 → (((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑛 + 1))) ↔ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗)) ⊆ ((𝐹 “ {𝑘}) ∩ (𝐴‘(𝑗 + 1)))))
104103cbvralv 3274 . . . . . . . . 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 23445 . . . . . . 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 696 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = sup((vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ*, < ))
10996iuneq2i 4647 . . . . . . . . . 10 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = 𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗))
11054cbviunv 4667 . . . . . . . . . 10 𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = 𝑗 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑗))
111 iunin2 4692 . . . . . . . . . 10 𝑛 ∈ ℕ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛))
112109, 110, 1113eqtr2i 2752 . . . . . . . . 9 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛))
113 ffn 6158 . . . . . . . . . . . . . 14 (𝐴:ℕ⟶dom vol → 𝐴 Fn ℕ)
114 fniunfv 6620 . . . . . . . . . . . . . 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 2758 . . . . . . . . . . . 12 (𝜑 𝑛 ∈ ℕ (𝐴𝑛) = ℝ)
118117adantr 472 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑛 ∈ ℕ (𝐴𝑛) = ℝ)
119118ineq2d 3922 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛)) = ((𝐹 “ {𝑘}) ∩ ℝ))
12011adantr 472 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) ∈ dom vol)
121120, 22syl 17 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) ⊆ ℝ)
122 df-ss 3694 . . . . . . . . . . 11 ((𝐹 “ {𝑘}) ⊆ ℝ ↔ ((𝐹 “ {𝑘}) ∩ ℝ) = (𝐹 “ {𝑘}))
123121, 122sylib 208 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ ℝ) = (𝐹 “ {𝑘}))
124119, 123eqtrd 2758 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝐹 “ {𝑘}) ∩ 𝑛 ∈ ℕ (𝐴𝑛)) = (𝐹 “ {𝑘}))
125112, 124syl5eq 2770 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑗 ∈ ℕ ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))‘𝑗) = (𝐹 “ {𝑘}))
126 ffn 6158 . . . . . . . . 9 ((𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))):ℕ⟶dom vol → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) Fn ℕ)
127 fniunfv 6620 . . . . . . . . 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 2760 . . . . . . 7 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝐹 “ {𝑘}) = ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
130129fveq2d 6308 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) = (vol‘ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
131 frn 6166 . . . . . . . . 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 6164 . . . . . . . . . . 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 11144 . . . . . . . . . . 11 1 ∈ ℕ
136 ne0i 4029 . . . . . . . . . . 11 (1 ∈ ℕ → ℕ ≠ ∅)
137135, 136mp1i 13 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ℕ ≠ ∅)
138134, 137eqnetrd 2963 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ≠ ∅)
139 dm0rn0 5449 . . . . . . . . . 10 (dom (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ∅ ↔ ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ∅)
140139necon3bii 2948 . . . . . . . . 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 6158 . . . . . . . . . . 11 ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))):ℕ⟶ℝ → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) Fn ℕ)
143 breq1 4763 . . . . . . . . . . . 12 (𝑧 = ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) → (𝑧𝑥 ↔ ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ≤ 𝑥))
144143ralrn 6477 . . . . . . . . . . 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 3154 . . . . . . . . 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 12271 . . . . . . . 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 1439 . . . . . . 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 5755 . . . . . . . . 9 ran (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
151 eqidd 2725 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))) = (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
152 volf 23418 . . . . . . . . . . . . 13 vol:dom vol⟶(0[,]+∞)
153152a1i 11 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → vol:dom vol⟶(0[,]+∞))
154153feqmptd 6363 . . . . . . . . . . 11 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → vol = (𝑦 ∈ dom vol ↦ (vol‘𝑦)))
155 fveq2 6304 . . . . . . . . . . 11 (𝑦 = ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) → (vol‘𝑦) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
15617, 151, 154, 155fmptco 6511 . . . . . . . . . 10 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
157156rneqd 5460 . . . . . . . . 9 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (vol ∘ (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
158150, 157syl5reqr 2773 . . . . . . . 8 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (vol “ ran (𝑛 ∈ ℕ ↦ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
159158supeq1d 8468 . . . . . . 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 2760 . . . . . 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 2768 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐹 “ {𝑘})) = sup(ran (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))), ℝ, < ))
16290, 161breqtrrd 4788 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ⇝ (vol‘(𝐹 “ {𝑘})))
163 i1ff 23563 . . . . . . . 8 (𝐹 ∈ dom ∫1𝐹:ℝ⟶ℝ)
164 frn 6166 . . . . . . . 8 (𝐹:ℝ⟶ℝ → ran 𝐹 ⊆ ℝ)
1653, 163, 1643syl 18 . . . . . . 7 (𝜑 → ran 𝐹 ⊆ ℝ)
166165ssdifssd 3856 . . . . . 6 (𝜑 → (ran 𝐹 ∖ {0}) ⊆ ℝ)
167166sselda 3709 . . . . 5 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑘 ∈ ℝ)
168167recnd 10181 . . . 4 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝑘 ∈ ℂ)
169 nnex 11139 . . . . . 6 ℕ ∈ V
170169mptex 6602 . . . . 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 6474 . . . . 5 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ∈ ℝ)
173172recnd 10181 . . . 4 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗) ∈ ℂ)
17455oveq2d 6781 . . . . . . 7 (𝑛 = 𝑗 → (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
175 eqid 2724 . . . . . . 7 (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) = (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
176 ovex 6793 . . . . . . 7 (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))) ∈ V
177174, 175, 176fvmpt 6396 . . . . . 6 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
17857oveq2d 6781 . . . . . 6 (𝑗 ∈ ℕ → (𝑘 · ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗)) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
179177, 178eqtr4d 2761 . . . . 5 (𝑗 ∈ ℕ → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) = (𝑘 · ((𝑛 ∈ ℕ ↦ (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))‘𝑗)))
180179adantl 473 . . . 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 14487 . . 3 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))) ⇝ (𝑘 · (vol‘(𝐹 “ {𝑘}))))
182169mptex 6602 . . . 4 (𝑛 ∈ ℕ ↦ (∫1𝐺)) ∈ V
183182a1i 11 . . 3 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ∈ V)
184167adantr 472 . . . . . . . 8 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → 𝑘 ∈ ℝ)
185184, 32remulcld 10183 . . . . . . 7 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑛 ∈ ℕ) → (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) ∈ ℝ)
186185, 175fmptd 6500 . . . . . 6 ((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))):ℕ⟶ℝ)
187186ffvelrnda 6474 . . . . 5 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℝ)
188187recnd 10181 . . . 4 (((𝜑𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑗 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℂ)
189188anasss 682 . . 3 ((𝜑 ∧ (𝑘 ∈ (ran 𝐹 ∖ {0}) ∧ 𝑗 ∈ ℕ)) → ((𝑛 ∈ ℕ ↦ (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗) ∈ ℂ)
1903adantr 472 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → 𝐹 ∈ dom ∫1)
191 itg1climres.5 . . . . . . . . . 10 𝐺 = (𝑥 ∈ ℝ ↦ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
192191i1fres 23592 . . . . . . . . 9 ((𝐹 ∈ dom ∫1 ∧ (𝐴𝑛) ∈ dom vol) → 𝐺 ∈ dom ∫1)
193190, 14, 192syl2anc 696 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → 𝐺 ∈ dom ∫1)
1948adantr 472 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (ran 𝐹 ∖ {0}) ∈ Fin)
195 ffn 6158 . . . . . . . . . . . . . 14 (𝐹:ℝ⟶ℝ → 𝐹 Fn ℝ)
1963, 163, 1953syl 18 . . . . . . . . . . . . 13 (𝜑𝐹 Fn ℝ)
197196adantr 472 . . . . . . . . . . . 12 ((𝜑𝑛 ∈ ℕ) → 𝐹 Fn ℝ)
198 fnfvelrn 6471 . . . . . . . . . . . 12 ((𝐹 Fn ℝ ∧ 𝑥 ∈ ℝ) → (𝐹𝑥) ∈ ran 𝐹)
199197, 198sylan 489 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → (𝐹𝑥) ∈ ran 𝐹)
200 i1f0rn 23569 . . . . . . . . . . . . 13 (𝐹 ∈ dom ∫1 → 0 ∈ ran 𝐹)
2013, 200syl 17 . . . . . . . . . . . 12 (𝜑 → 0 ∈ ran 𝐹)
202201ad2antrr 764 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → 0 ∈ ran 𝐹)
203199, 202ifcld 4239 . . . . . . . . . 10 (((𝜑𝑛 ∈ ℕ) ∧ 𝑥 ∈ ℝ) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ ran 𝐹)
204203, 191fmptd 6500 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → 𝐺:ℝ⟶ran 𝐹)
205 frn 6166 . . . . . . . . 9 (𝐺:ℝ⟶ran 𝐹 → ran 𝐺 ⊆ ran 𝐹)
206 ssdif 3853 . . . . . . . . 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 472 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → ran 𝐹 ⊆ ℝ)
209208ssdifd 3854 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (ran 𝐹 ∖ {0}) ⊆ (ℝ ∖ {0}))
210 itg1val2 23571 . . . . . . . 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 1441 . . . . . . 7 ((𝜑𝑛 ∈ ℕ) → (∫1𝐺) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐺 “ {𝑘}))))
212 fvex 6314 . . . . . . . . . . . . . . . . . . . . 21 (𝐹𝑥) ∈ V
213 c0ex 10147 . . . . . . . . . . . . . . . . . . . . 21 0 ∈ V
214212, 213ifex 4264 . . . . . . . . . . . . . . . . . . . 20 if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ V
215191fvmpt2 6405 . . . . . . . . . . . . . . . . . . . 20 ((𝑥 ∈ ℝ ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) ∈ V) → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
216214, 215mpan2 709 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ ℝ → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
217216adantl 473 . . . . . . . . . . . . . . . . . 18 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → (𝐺𝑥) = if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
218217eqeq1d 2726 . . . . . . . . . . . . . . . . 17 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → ((𝐺𝑥) = 𝑘 ↔ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘))
219 eldifsni 4429 . . . . . . . . . . . . . . . . . . . . 21 (𝑘 ∈ (ran 𝐹 ∖ {0}) → 𝑘 ≠ 0)
220219ad2antlr 765 . . . . . . . . . . . . . . . . . . . 20 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) ∧ 𝑥 ∈ ℝ) → 𝑘 ≠ 0)
221 neeq1 2958 . . . . . . . . . . . . . . . . . . . 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 4203 . . . . . . . . . . . . . . . . . . . 20 𝑥 ∈ (𝐴𝑛) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 0)
224223necon1ai 2923 . . . . . . . . . . . . . . . . . . 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 670 . . . . . . . . . . . . . . . . 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 4200 . . . . . . . . . . . . . . . . . . 19 (𝑥 ∈ (𝐴𝑛) → if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = (𝐹𝑥))
229228eqeq1d 2726 . . . . . . . . . . . . . . . . . 18 (𝑥 ∈ (𝐴𝑛) → (if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘 ↔ (𝐹𝑥) = 𝑘))
230229pm5.32i 672 . . . . . . . . . . . . . . . . 17 ((𝑥 ∈ (𝐴𝑛) ∧ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0) = 𝑘) ↔ (𝑥 ∈ (𝐴𝑛) ∧ (𝐹𝑥) = 𝑘))
231 ancom 465 . . . . . . . . . . . . . . . . 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 676 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ((𝑥 ∈ ℝ ∧ (𝐺𝑥) = 𝑘) ↔ (𝑥 ∈ ℝ ∧ ((𝐹𝑥) = 𝑘𝑥 ∈ (𝐴𝑛)))))
235 anass 684 . . . . . . . . . . . . . 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 23563 . . . . . . . . . . . . . . . 16 (𝐺 ∈ dom ∫1𝐺:ℝ⟶ℝ)
238 ffn 6158 . . . . . . . . . . . . . . . 16 (𝐺:ℝ⟶ℝ → 𝐺 Fn ℝ)
239193, 237, 2383syl 18 . . . . . . . . . . . . . . 15 ((𝜑𝑛 ∈ ℕ) → 𝐺 Fn ℝ)
240239adantr 472 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐺 Fn ℝ)
241 fniniseg 6453 . . . . . . . . . . . . . 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 3904 . . . . . . . . . . . . . 14 (𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛)) ↔ (𝑥 ∈ (𝐹 “ {𝑘}) ∧ 𝑥 ∈ (𝐴𝑛)))
244197adantr 472 . . . . . . . . . . . . . . . 16 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → 𝐹 Fn ℝ)
245 fniniseg 6453 . . . . . . . . . . . . . . . 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 743 . . . . . . . . . . . . . 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 1968 . . . . . . . . . . 11 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → ∀𝑥(𝑥 ∈ (𝐺 “ {𝑘}) ↔ 𝑥 ∈ ((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
251 nfmpt1 4855 . . . . . . . . . . . . . . 15 𝑥(𝑥 ∈ ℝ ↦ if(𝑥 ∈ (𝐴𝑛), (𝐹𝑥), 0))
252191, 251nfcxfr 2864 . . . . . . . . . . . . . 14 𝑥𝐺
253252nfcnv 5408 . . . . . . . . . . . . 13 𝑥𝐺
254 nfcv 2866 . . . . . . . . . . . . 13 𝑥{𝑘}
255253, 254nfima 5584 . . . . . . . . . . . 12 𝑥(𝐺 “ {𝑘})
256 nfcv 2866 . . . . . . . . . . . 12 𝑥((𝐹 “ {𝑘}) ∩ (𝐴𝑛))
257255, 256cleqf 2892 . . . . . . . . . . 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 6308 . . . . . . . . 9 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (vol‘(𝐺 “ {𝑘})) = (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))
260259oveq2d 6781 . . . . . . . 8 (((𝜑𝑛 ∈ ℕ) ∧ 𝑘 ∈ (ran 𝐹 ∖ {0})) → (𝑘 · (vol‘(𝐺 “ {𝑘}))) = (𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
261260sumeq2dv 14553 . . . . . . 7 ((𝜑𝑛 ∈ ℕ) → Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐺 “ {𝑘}))) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
262211, 261eqtrd 2758 . . . . . 6 ((𝜑𝑛 ∈ ℕ) → (∫1𝐺) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))
263262mpteq2dva 4852 . . . . 5 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛))))))
264263fveq1d 6306 . . . 4 (𝜑 → ((𝑛 ∈ ℕ ↦ (∫1𝐺))‘𝑗) = ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))))‘𝑗))
265174sumeq2sdv 14555 . . . . . 6 (𝑛 = 𝑗 → Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑛)))) = Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))))
266 eqid 2724 . . . . . 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 14538 . . . . . 6 Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘((𝐹 “ {𝑘}) ∩ (𝐴𝑗)))) ∈ V
268265, 266, 267fvmpt 6396 . . . . 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 14555 . . . . 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 2761 . . . 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 2778 . . 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 14672 . 2 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ⇝ Σ𝑘 ∈ (ran 𝐹 ∖ {0})(𝑘 · (vol‘(𝐹 “ {𝑘}))))
273 itg1val 23570 . . 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 4788 1 (𝜑 → (𝑛 ∈ ℕ ↦ (∫1𝐺)) ⇝ (∫1𝐹))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  wal 1594   = wceq 1596  wcel 2103  wne 2896  wral 3014  wrex 3015  Vcvv 3304  cdif 3677  cin 3679  wss 3680  c0 4023  ifcif 4194  {csn 4285   cuni 4544   ciun 4628   class class class wbr 4760  cmpt 4837  ccnv 5217  dom cdm 5218  ran crn 5219  cima 5221  ccom 5222   Fn wfn 5996  wf 5997  cfv 6001  (class class class)co 6765  Fincfn 8072  supcsup 8462  cc 10047  cr 10048  0cc0 10049  1c1 10050   + caddc 10052   · cmul 10054  +∞cpnf 10184  *cxr 10186   < clt 10187  cle 10188  cn 11133  [,]cicc 12292  cli 14335  Σcsu 14536  vol*covol 23352  volcvol 23353  1citg1 23504
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1835  ax-4 1850  ax-5 1952  ax-6 2018  ax-7 2054  ax-8 2105  ax-9 2112  ax-10 2132  ax-11 2147  ax-12 2160  ax-13 2355  ax-ext 2704  ax-rep 4879  ax-sep 4889  ax-nul 4897  ax-pow 4948  ax-pr 5011  ax-un 7066  ax-inf2 8651  ax-cc 9370  ax-cnex 10105  ax-resscn 10106  ax-1cn 10107  ax-icn 10108  ax-addcl 10109  ax-addrcl 10110  ax-mulcl 10111  ax-mulrcl 10112  ax-mulcom 10113  ax-addass 10114  ax-mulass 10115  ax-distr 10116  ax-i2m1 10117  ax-1ne0 10118  ax-1rid 10119  ax-rnegex 10120  ax-rrecex 10121  ax-cnre 10122  ax-pre-lttri 10123  ax-pre-lttrn 10124  ax-pre-ltadd 10125  ax-pre-mulgt0 10126  ax-pre-sup 10127  ax-addf 10128
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1599  df-fal 1602  df-ex 1818  df-nf 1823  df-sb 2011  df-eu 2575  df-mo 2576  df-clab 2711  df-cleq 2717  df-clel 2720  df-nfc 2855  df-ne 2897  df-nel 3000  df-ral 3019  df-rex 3020  df-reu 3021  df-rmo 3022  df-rab 3023  df-v 3306  df-sbc 3542  df-csb 3640  df-dif 3683  df-un 3685  df-in 3687  df-ss 3694  df-pss 3696  df-nul 4024  df-if 4195  df-pw 4268  df-sn 4286  df-pr 4288  df-tp 4290  df-op 4292  df-uni 4545  df-int 4584  df-iun 4630  df-disj 4729  df-br 4761  df-opab 4821  df-mpt 4838  df-tr 4861  df-id 5128  df-eprel 5133  df-po 5139  df-so 5140  df-fr 5177  df-se 5178  df-we 5179  df-xp 5224  df-rel 5225  df-cnv 5226  df-co 5227  df-dm 5228  df-rn 5229  df-res 5230  df-ima 5231  df-pred 5793  df-ord 5839  df-on 5840  df-lim 5841  df-suc 5842  df-iota 5964  df-fun 6003  df-fn 6004  df-f 6005  df-f1 6006  df-fo 6007  df-f1o 6008  df-fv 6009  df-isom 6010  df-riota 6726  df-ov 6768  df-oprab 6769  df-mpt2 6770  df-of 7014  df-om 7183  df-1st 7285  df-2nd 7286  df-wrecs 7527  df-recs 7588  df-rdg 7626  df-1o 7680  df-2o 7681  df-oadd 7684  df-er 7862  df-map 7976  df-pm 7977  df-en 8073  df-dom 8074  df-sdom 8075  df-fin 8076  df-fi 8433  df-sup 8464  df-inf 8465  df-oi 8531  df-card 8878  df-cda 9103  df-pnf 10189  df-mnf 10190  df-xr 10191  df-ltxr 10192  df-le 10193  df-sub 10381  df-neg 10382  df-div 10798  df-nn 11134  df-2 11192  df-3 11193  df-n0 11406  df-z 11491  df-uz 11801  df-q 11903  df-rp 11947  df-xneg 12060  df-xadd 12061  df-xmul 12062  df-ioo 12293  df-ico 12295  df-icc 12296  df-fz 12441  df-fzo 12581  df-fl 12708  df-seq 12917  df-exp 12976  df-hash 13233  df-cj 13959  df-re 13960  df-im 13961  df-sqrt 14095  df-abs 14096  df-clim 14339  df-rlim 14340  df-sum 14537  df-rest 16206  df-topgen 16227  df-psmet 19861  df-xmet 19862  df-met 19863  df-bl 19864  df-mopn 19865  df-top 20822  df-topon 20839  df-bases 20873  df-cmp 21313  df-ovol 23354  df-vol 23355  df-mbf 23508  df-itg1 23509
This theorem is referenced by:  itg2monolem1  23637
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