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Theorem hoicvrrex 41276
Description: Any subset of the multidimensional reals can be covered by a countable set of half-open intervals, see Definition 115A (b) of [Fremlin1] p. 29. (Contributed by Glauco Siliprandi, 11-Oct-2020.)
Hypotheses
Ref Expression
hoicvrrex.fi (𝜑𝑋 ∈ Fin)
hoicvrrex.y (𝜑𝑌 ⊆ (ℝ ↑𝑚 𝑋))
Assertion
Ref Expression
hoicvrrex (𝜑 → ∃𝑖 ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ)(𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘))))))
Distinct variable groups:   𝑖,𝑋,𝑗,𝑘   𝑖,𝑌   𝜑,𝑗,𝑘
Allowed substitution hints:   𝜑(𝑖)   𝑌(𝑗,𝑘)

Proof of Theorem hoicvrrex
Dummy variable 𝑙 is distinct from all other variables.
StepHypRef Expression
1 nnre 11219 . . . . . . . . 9 (𝑗 ∈ ℕ → 𝑗 ∈ ℝ)
21renegcld 10649 . . . . . . . 8 (𝑗 ∈ ℕ → -𝑗 ∈ ℝ)
3 opelxpi 5305 . . . . . . . 8 ((-𝑗 ∈ ℝ ∧ 𝑗 ∈ ℝ) → ⟨-𝑗, 𝑗⟩ ∈ (ℝ × ℝ))
42, 1, 3syl2anc 696 . . . . . . 7 (𝑗 ∈ ℕ → ⟨-𝑗, 𝑗⟩ ∈ (ℝ × ℝ))
54ad2antlr 765 . . . . . 6 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → ⟨-𝑗, 𝑗⟩ ∈ (ℝ × ℝ))
6 eqid 2760 . . . . . 6 (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) = (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)
75, 6fmptd 6548 . . . . 5 ((𝜑𝑗 ∈ ℕ) → (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩):𝑋⟶(ℝ × ℝ))
8 reex 10219 . . . . . . . . 9 ℝ ∈ V
98, 8xpex 7127 . . . . . . . 8 (ℝ × ℝ) ∈ V
109a1i 11 . . . . . . 7 (𝜑 → (ℝ × ℝ) ∈ V)
11 hoicvrrex.fi . . . . . . 7 (𝜑𝑋 ∈ Fin)
12 elmapg 8036 . . . . . . 7 (((ℝ × ℝ) ∈ V ∧ 𝑋 ∈ Fin) → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ ((ℝ × ℝ) ↑𝑚 𝑋) ↔ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩):𝑋⟶(ℝ × ℝ)))
1310, 11, 12syl2anc 696 . . . . . 6 (𝜑 → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ ((ℝ × ℝ) ↑𝑚 𝑋) ↔ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩):𝑋⟶(ℝ × ℝ)))
1413adantr 472 . . . . 5 ((𝜑𝑗 ∈ ℕ) → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ ((ℝ × ℝ) ↑𝑚 𝑋) ↔ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩):𝑋⟶(ℝ × ℝ)))
157, 14mpbird 247 . . . 4 ((𝜑𝑗 ∈ ℕ) → (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ ((ℝ × ℝ) ↑𝑚 𝑋))
16 eqid 2760 . . . 4 (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
1715, 16fmptd 6548 . . 3 (𝜑 → (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)):ℕ⟶((ℝ × ℝ) ↑𝑚 𝑋))
18 ovex 6841 . . . 4 ((ℝ × ℝ) ↑𝑚 𝑋) ∈ V
19 nnex 11218 . . . 4 ℕ ∈ V
2018, 19elmap 8052 . . 3 ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ) ↔ (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)):ℕ⟶((ℝ × ℝ) ↑𝑚 𝑋))
2117, 20sylibr 224 . 2 (𝜑 → (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ))
22 hoicvrrex.y . . . 4 (𝜑𝑌 ⊆ (ℝ ↑𝑚 𝑋))
23 eqid 2760 . . . . . 6 (𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩)) = (𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))
2423, 11hoicvr 41268 . . . . 5 (𝜑 → (ℝ ↑𝑚 𝑋) ⊆ 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
25 eqidd 2761 . . . . . . . . . . . . 13 (𝑙 = 𝑘 → ⟨-𝑗, 𝑗⟩ = ⟨-𝑗, 𝑗⟩)
2625cbvmptv 4902 . . . . . . . . . . . 12 (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩) = (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)
2726mpteq2i 4893 . . . . . . . . . . 11 (𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩)) = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
2827a1i 11 . . . . . . . . . 10 (𝜑 → (𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩)) = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)))
2928fveq1d 6354 . . . . . . . . 9 (𝜑 → ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗) = ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))
3029coeq2d 5440 . . . . . . . 8 (𝜑 → ([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)) = ([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)))
3130fveq1d 6354 . . . . . . 7 (𝜑 → (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) = (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
3231ixpeq2dv 8090 . . . . . 6 (𝜑X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) = X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
3332iuneq2d 4699 . . . . 5 (𝜑 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑙𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) = 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
3424, 33sseqtrd 3782 . . . 4 (𝜑 → (ℝ ↑𝑚 𝑋) ⊆ 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
3522, 34sstrd 3754 . . 3 (𝜑𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
36 simpr 479 . . . . . . . . . . . . . . 15 ((𝜑𝑗 ∈ ℕ) → 𝑗 ∈ ℕ)
3715elexd 3354 . . . . . . . . . . . . . . 15 ((𝜑𝑗 ∈ ℕ) → (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ V)
3816fvmpt2 6453 . . . . . . . . . . . . . . 15 ((𝑗 ∈ ℕ ∧ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩) ∈ V) → ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗) = (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
3936, 37, 38syl2anc 696 . . . . . . . . . . . . . 14 ((𝜑𝑗 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗) = (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
4039, 5fmpt3d 6549 . . . . . . . . . . . . 13 ((𝜑𝑗 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗):𝑋⟶(ℝ × ℝ))
4140adantr 472 . . . . . . . . . . . 12 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗):𝑋⟶(ℝ × ℝ))
42 simpr 479 . . . . . . . . . . . 12 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → 𝑘𝑋)
4341, 42fvovco 39880 . . . . . . . . . . 11 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) = ((1st ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘))[,)(2nd ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘))))
4439fveq1d 6354 . . . . . . . . . . . . . . . 16 ((𝜑𝑗 ∈ ℕ) → (((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘) = ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)‘𝑘))
4544adantr 472 . . . . . . . . . . . . . . 15 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘) = ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)‘𝑘))
46 simpr 479 . . . . . . . . . . . . . . . . 17 ((𝜑𝑘𝑋) → 𝑘𝑋)
47 opex 5081 . . . . . . . . . . . . . . . . . 18 ⟨-𝑗, 𝑗⟩ ∈ V
4847a1i 11 . . . . . . . . . . . . . . . . 17 ((𝜑𝑘𝑋) → ⟨-𝑗, 𝑗⟩ ∈ V)
496fvmpt2 6453 . . . . . . . . . . . . . . . . 17 ((𝑘𝑋 ∧ ⟨-𝑗, 𝑗⟩ ∈ V) → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)‘𝑘) = ⟨-𝑗, 𝑗⟩)
5046, 48, 49syl2anc 696 . . . . . . . . . . . . . . . 16 ((𝜑𝑘𝑋) → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)‘𝑘) = ⟨-𝑗, 𝑗⟩)
5150adantlr 753 . . . . . . . . . . . . . . 15 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → ((𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)‘𝑘) = ⟨-𝑗, 𝑗⟩)
5245, 51eqtrd 2794 . . . . . . . . . . . . . 14 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘) = ⟨-𝑗, 𝑗⟩)
5352fveq2d 6356 . . . . . . . . . . . . 13 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (1st ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘)) = (1st ‘⟨-𝑗, 𝑗⟩))
54 negex 10471 . . . . . . . . . . . . . . 15 -𝑗 ∈ V
55 vex 3343 . . . . . . . . . . . . . . 15 𝑗 ∈ V
5654, 55op1st 7341 . . . . . . . . . . . . . 14 (1st ‘⟨-𝑗, 𝑗⟩) = -𝑗
5756a1i 11 . . . . . . . . . . . . 13 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (1st ‘⟨-𝑗, 𝑗⟩) = -𝑗)
5853, 57eqtrd 2794 . . . . . . . . . . . 12 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (1st ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘)) = -𝑗)
5952fveq2d 6356 . . . . . . . . . . . . 13 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (2nd ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘)) = (2nd ‘⟨-𝑗, 𝑗⟩))
6054, 55op2nd 7342 . . . . . . . . . . . . . 14 (2nd ‘⟨-𝑗, 𝑗⟩) = 𝑗
6160a1i 11 . . . . . . . . . . . . 13 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (2nd ‘⟨-𝑗, 𝑗⟩) = 𝑗)
6259, 61eqtrd 2794 . . . . . . . . . . . 12 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (2nd ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘)) = 𝑗)
6358, 62oveq12d 6831 . . . . . . . . . . 11 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → ((1st ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘))[,)(2nd ‘(((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)‘𝑘))) = (-𝑗[,)𝑗))
6443, 63eqtrd 2794 . . . . . . . . . 10 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) = (-𝑗[,)𝑗))
6564fveq2d 6356 . . . . . . . . 9 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)) = (vol‘(-𝑗[,)𝑗)))
66 volico 40703 . . . . . . . . . . . 12 ((-𝑗 ∈ ℝ ∧ 𝑗 ∈ ℝ) → (vol‘(-𝑗[,)𝑗)) = if(-𝑗 < 𝑗, (𝑗 − -𝑗), 0))
672, 1, 66syl2anc 696 . . . . . . . . . . 11 (𝑗 ∈ ℕ → (vol‘(-𝑗[,)𝑗)) = if(-𝑗 < 𝑗, (𝑗 − -𝑗), 0))
68 nnrp 12035 . . . . . . . . . . . . 13 (𝑗 ∈ ℕ → 𝑗 ∈ ℝ+)
69 neglt 39995 . . . . . . . . . . . . 13 (𝑗 ∈ ℝ+ → -𝑗 < 𝑗)
7068, 69syl 17 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → -𝑗 < 𝑗)
7170iftrued 4238 . . . . . . . . . . 11 (𝑗 ∈ ℕ → if(-𝑗 < 𝑗, (𝑗 − -𝑗), 0) = (𝑗 − -𝑗))
721recnd 10260 . . . . . . . . . . . . 13 (𝑗 ∈ ℕ → 𝑗 ∈ ℂ)
7372, 72subnegd 10591 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → (𝑗 − -𝑗) = (𝑗 + 𝑗))
74722timesd 11467 . . . . . . . . . . . 12 (𝑗 ∈ ℕ → (2 · 𝑗) = (𝑗 + 𝑗))
7573, 74eqtr4d 2797 . . . . . . . . . . 11 (𝑗 ∈ ℕ → (𝑗 − -𝑗) = (2 · 𝑗))
7667, 71, 753eqtrd 2798 . . . . . . . . . 10 (𝑗 ∈ ℕ → (vol‘(-𝑗[,)𝑗)) = (2 · 𝑗))
7776ad2antlr 765 . . . . . . . . 9 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (vol‘(-𝑗[,)𝑗)) = (2 · 𝑗))
7865, 77eqtrd 2794 . . . . . . . 8 (((𝜑𝑗 ∈ ℕ) ∧ 𝑘𝑋) → (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)) = (2 · 𝑗))
7978prodeq2dv 14852 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)) = ∏𝑘𝑋 (2 · 𝑗))
8011adantr 472 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → 𝑋 ∈ Fin)
81 2cnd 11285 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → 2 ∈ ℂ)
8272adantl 473 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → 𝑗 ∈ ℂ)
8381, 82mulcld 10252 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → (2 · 𝑗) ∈ ℂ)
84 fprodconst 14907 . . . . . . . 8 ((𝑋 ∈ Fin ∧ (2 · 𝑗) ∈ ℂ) → ∏𝑘𝑋 (2 · 𝑗) = ((2 · 𝑗)↑(♯‘𝑋)))
8580, 83, 84syl2anc 696 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → ∏𝑘𝑋 (2 · 𝑗) = ((2 · 𝑗)↑(♯‘𝑋)))
8679, 85eqtrd 2794 . . . . . 6 ((𝜑𝑗 ∈ ℕ) → ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)) = ((2 · 𝑗)↑(♯‘𝑋)))
8786mpteq2dva 4896 . . . . 5 (𝜑 → (𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))) = (𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋))))
8887fveq2d 6356 . . . 4 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))) = (Σ^‘(𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))))
8919a1i 11 . . . . . 6 (𝜑 → ℕ ∈ V)
9068ssriv 3748 . . . . . . . . . 10 ℕ ⊆ ℝ+
91 ioorp 12444 . . . . . . . . . . 11 (0(,)+∞) = ℝ+
9291eqcomi 2769 . . . . . . . . . 10 + = (0(,)+∞)
9390, 92sseqtri 3778 . . . . . . . . 9 ℕ ⊆ (0(,)+∞)
94 ioossicc 12452 . . . . . . . . 9 (0(,)+∞) ⊆ (0[,]+∞)
9593, 94sstri 3753 . . . . . . . 8 ℕ ⊆ (0[,]+∞)
96 2nn 11377 . . . . . . . . . . 11 2 ∈ ℕ
9796a1i 11 . . . . . . . . . 10 ((𝜑𝑗 ∈ ℕ) → 2 ∈ ℕ)
9897, 36nnmulcld 11260 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (2 · 𝑗) ∈ ℕ)
99 hashcl 13339 . . . . . . . . . . 11 (𝑋 ∈ Fin → (♯‘𝑋) ∈ ℕ0)
10011, 99syl 17 . . . . . . . . . 10 (𝜑 → (♯‘𝑋) ∈ ℕ0)
101100adantr 472 . . . . . . . . 9 ((𝜑𝑗 ∈ ℕ) → (♯‘𝑋) ∈ ℕ0)
102 nnexpcl 13067 . . . . . . . . 9 (((2 · 𝑗) ∈ ℕ ∧ (♯‘𝑋) ∈ ℕ0) → ((2 · 𝑗)↑(♯‘𝑋)) ∈ ℕ)
10398, 101, 102syl2anc 696 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → ((2 · 𝑗)↑(♯‘𝑋)) ∈ ℕ)
10495, 103sseldi 3742 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → ((2 · 𝑗)↑(♯‘𝑋)) ∈ (0[,]+∞))
105 eqid 2760 . . . . . . 7 (𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋))) = (𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))
106104, 105fmptd 6548 . . . . . 6 (𝜑 → (𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋))):ℕ⟶(0[,]+∞))
10789, 106sge0xrcl 41105 . . . . 5 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))) ∈ ℝ*)
108 pnfxr 10284 . . . . . . 7 +∞ ∈ ℝ*
109108a1i 11 . . . . . 6 (𝜑 → +∞ ∈ ℝ*)
110 1nn 11223 . . . . . . . . . 10 1 ∈ ℕ
11195, 110sselii 3741 . . . . . . . . 9 1 ∈ (0[,]+∞)
112111a1i 11 . . . . . . . 8 ((𝜑𝑗 ∈ ℕ) → 1 ∈ (0[,]+∞))
113 eqid 2760 . . . . . . . 8 (𝑗 ∈ ℕ ↦ 1) = (𝑗 ∈ ℕ ↦ 1)
114112, 113fmptd 6548 . . . . . . 7 (𝜑 → (𝑗 ∈ ℕ ↦ 1):ℕ⟶(0[,]+∞))
11589, 114sge0xrcl 41105 . . . . . 6 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ 1)) ∈ ℝ*)
116 nnnfi 12959 . . . . . . . . . 10 ¬ ℕ ∈ Fin
117116a1i 11 . . . . . . . . 9 (𝜑 → ¬ ℕ ∈ Fin)
118 1rp 12029 . . . . . . . . . 10 1 ∈ ℝ+
119118a1i 11 . . . . . . . . 9 (𝜑 → 1 ∈ ℝ+)
12089, 117, 119sge0rpcpnf 41141 . . . . . . . 8 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ 1)) = +∞)
121120eqcomd 2766 . . . . . . 7 (𝜑 → +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ 1)))
122109, 121xreqled 40044 . . . . . 6 (𝜑 → +∞ ≤ (Σ^‘(𝑗 ∈ ℕ ↦ 1)))
123 nfv 1992 . . . . . . 7 𝑗𝜑
124114mptex2 6547 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → 1 ∈ (0[,]+∞))
125103nnge1d 11255 . . . . . . 7 ((𝜑𝑗 ∈ ℕ) → 1 ≤ ((2 · 𝑗)↑(♯‘𝑋)))
126123, 89, 124, 104, 125sge0lempt 41130 . . . . . 6 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ 1)) ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))))
127109, 115, 107, 122, 126xrletrd 12186 . . . . 5 (𝜑 → +∞ ≤ (Σ^‘(𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))))
128107, 127xrgepnfd 40045 . . . 4 (𝜑 → (Σ^‘(𝑗 ∈ ℕ ↦ ((2 · 𝑗)↑(♯‘𝑋)))) = +∞)
129 eqidd 2761 . . . 4 (𝜑 → +∞ = +∞)
13088, 128, 1293eqtrrd 2799 . . 3 (𝜑 → +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))))
13135, 130jca 555 . 2 (𝜑 → (𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))))))
132 nfcv 2902 . . . . . . 7 𝑗𝑖
133 nfmpt1 4899 . . . . . . 7 𝑗(𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
134132, 133nfeq 2914 . . . . . 6 𝑗 𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
135 nfcv 2902 . . . . . . . . 9 𝑘𝑖
136 nfcv 2902 . . . . . . . . . 10 𝑘
137 nfmpt1 4899 . . . . . . . . . 10 𝑘(𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)
138136, 137nfmpt 4898 . . . . . . . . 9 𝑘(𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
139135, 138nfeq 2914 . . . . . . . 8 𝑘 𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))
140 fveq1 6351 . . . . . . . . . . 11 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (𝑖𝑗) = ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))
141140coeq2d 5440 . . . . . . . . . 10 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → ([,) ∘ (𝑖𝑗)) = ([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗)))
142141fveq1d 6354 . . . . . . . . 9 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (([,) ∘ (𝑖𝑗))‘𝑘) = (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
143142adantr 472 . . . . . . . 8 ((𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∧ 𝑘𝑋) → (([,) ∘ (𝑖𝑗))‘𝑘) = (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
144139, 143ixpeq2d 39736 . . . . . . 7 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) = X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
145144adantr 472 . . . . . 6 ((𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∧ 𝑗 ∈ ℕ) → X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) = X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
146134, 145iuneq2df 39711 . . . . 5 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) = 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))
147146sseq2d 3774 . . . 4 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) ↔ 𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))
148142fveq2d 6356 . . . . . . . . . . 11 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)) = (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))
149148a1d 25 . . . . . . . . . 10 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (𝑘𝑋 → (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)) = (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))))
150139, 149ralrimi 3095 . . . . . . . . 9 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → ∀𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)) = (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))
151150adantr 472 . . . . . . . 8 ((𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∧ 𝑗 ∈ ℕ) → ∀𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)) = (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))
152151prodeq2d 14851 . . . . . . 7 ((𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∧ 𝑗 ∈ ℕ) → ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)) = ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))
153134, 152mpteq2da 4895 . . . . . 6 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘))) = (𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))))
154153fveq2d 6356 . . . . 5 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)))) = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))))
155154eqeq2d 2770 . . . 4 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → (+∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘)))) ↔ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘))))))
156147, 155anbi12d 749 . . 3 (𝑖 = (𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) → ((𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘))))) ↔ (𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))))))
157156rspcev 3449 . 2 (((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩)) ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ) ∧ (𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ ((𝑗 ∈ ℕ ↦ (𝑘𝑋 ↦ ⟨-𝑗, 𝑗⟩))‘𝑗))‘𝑘)))))) → ∃𝑖 ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ)(𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘))))))
15821, 131, 157syl2anc 696 1 (𝜑 → ∃𝑖 ∈ (((ℝ × ℝ) ↑𝑚 𝑋) ↑𝑚 ℕ)(𝑌 𝑗 ∈ ℕ X𝑘𝑋 (([,) ∘ (𝑖𝑗))‘𝑘) ∧ +∞ = (Σ^‘(𝑗 ∈ ℕ ↦ ∏𝑘𝑋 (vol‘(([,) ∘ (𝑖𝑗))‘𝑘))))))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 383   = wceq 1632  wcel 2139  wral 3050  wrex 3051  Vcvv 3340  wss 3715  ifcif 4230  cop 4327   ciun 4672   class class class wbr 4804  cmpt 4881   × cxp 5264  ccom 5270  wf 6045  cfv 6049  (class class class)co 6813  1st c1st 7331  2nd c2nd 7332  𝑚 cmap 8023  Xcixp 8074  Fincfn 8121  cc 10126  cr 10127  0cc0 10128  1c1 10129   + caddc 10131   · cmul 10133  +∞cpnf 10263  *cxr 10265   < clt 10266  cmin 10458  -cneg 10459  cn 11212  2c2 11262  0cn0 11484  +crp 12025  (,)cioo 12368  [,)cico 12370  [,]cicc 12371  cexp 13054  chash 13311  cprod 14834  volcvol 23432  Σ^csumge0 41082
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-rep 4923  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7114  ax-inf2 8711  ax-cnex 10184  ax-resscn 10185  ax-1cn 10186  ax-icn 10187  ax-addcl 10188  ax-addrcl 10189  ax-mulcl 10190  ax-mulrcl 10191  ax-mulcom 10192  ax-addass 10193  ax-mulass 10194  ax-distr 10195  ax-i2m1 10196  ax-1ne0 10197  ax-1rid 10198  ax-rnegex 10199  ax-rrecex 10200  ax-cnre 10201  ax-pre-lttri 10202  ax-pre-lttrn 10203  ax-pre-ltadd 10204  ax-pre-mulgt0 10205  ax-pre-sup 10206
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1635  df-fal 1638  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-nel 3036  df-ral 3055  df-rex 3056  df-reu 3057  df-rmo 3058  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-pss 3731  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-tp 4326  df-op 4328  df-uni 4589  df-int 4628  df-iun 4674  df-br 4805  df-opab 4865  df-mpt 4882  df-tr 4905  df-id 5174  df-eprel 5179  df-po 5187  df-so 5188  df-fr 5225  df-se 5226  df-we 5227  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-pred 5841  df-ord 5887  df-on 5888  df-lim 5889  df-suc 5890  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-f1 6054  df-fo 6055  df-f1o 6056  df-fv 6057  df-isom 6058  df-riota 6774  df-ov 6816  df-oprab 6817  df-mpt2 6818  df-of 7062  df-om 7231  df-1st 7333  df-2nd 7334  df-wrecs 7576  df-recs 7637  df-rdg 7675  df-1o 7729  df-2o 7730  df-oadd 7733  df-er 7911  df-map 8025  df-pm 8026  df-ixp 8075  df-en 8122  df-dom 8123  df-sdom 8124  df-fin 8125  df-fi 8482  df-sup 8513  df-inf 8514  df-oi 8580  df-card 8955  df-cda 9182  df-pnf 10268  df-mnf 10269  df-xr 10270  df-ltxr 10271  df-le 10272  df-sub 10460  df-neg 10461  df-div 10877  df-nn 11213  df-2 11271  df-3 11272  df-n0 11485  df-z 11570  df-uz 11880  df-q 11982  df-rp 12026  df-xneg 12139  df-xadd 12140  df-xmul 12141  df-ioo 12372  df-ico 12374  df-icc 12375  df-fz 12520  df-fzo 12660  df-fl 12787  df-seq 12996  df-exp 13055  df-hash 13312  df-cj 14038  df-re 14039  df-im 14040  df-sqrt 14174  df-abs 14175  df-clim 14418  df-rlim 14419  df-sum 14616  df-prod 14835  df-rest 16285  df-topgen 16306  df-psmet 19940  df-xmet 19941  df-met 19942  df-bl 19943  df-mopn 19944  df-top 20901  df-topon 20918  df-bases 20952  df-cmp 21392  df-ovol 23433  df-vol 23434  df-sumge0 41083
This theorem is referenced by:  ovnpnfelsup  41279
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