hoidmv1le - Mathbox for Glauco Siliprandi

	Mathbox for Glauco Siliprandi		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > hoidmv1le		Structured version Visualization version GIF version

Theorem hoidmv1le 40808

Description: The dimensional volume of a 1-dimensional half-open interval is less than or equal to the generalized sum of the dimensional volumes of countable half-open intervals that cover it. This is one of the two base cases of the induction of Lemma 115B of [Fremlin1] p. 29 (the other base case is the 0-dimensional case). This proof of the 1-dimensional case is given in Lemma 114B of [Fremlin1] p. 23. (Contributed by Glauco Siliprandi, 21-Nov-2020.)

**Hypotheses**
Ref	Expression
hoidmv1le.l	⊢ 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
hoidmv1le.z	⊢ (𝜑 → 𝑍 ∈ 𝑉)
hoidmv1le.x	⊢ 𝑋 = {𝑍}
hoidmv1le.a	⊢ (𝜑 → 𝐴:𝑋⟶ℝ)
hoidmv1le.b	⊢ (𝜑 → 𝐵:𝑋⟶ℝ)
hoidmv1le.c	⊢ (𝜑 → 𝐶:ℕ⟶(ℝ ↑_𝑚 𝑋))
hoidmv1le.d	⊢ (𝜑 → 𝐷:ℕ⟶(ℝ ↑_𝑚 𝑋))
hoidmv1le.s	⊢ (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))

**Assertion**
Ref	Expression
hoidmv1le	⊢ (𝜑 → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))

Distinct variable groups: 𝑥,𝑘 𝐴,𝑎,𝑏,𝑗,𝑘,𝑥 𝐵,𝑎,𝑏,𝑗,𝑘,𝑥 𝐶,𝑎,𝑏,𝑗,𝑘,𝑥 𝐷,𝑎,𝑏,𝑗,𝑘,𝑥 𝑘,𝑉 𝑋,𝑎,𝑏,𝑘,𝑥 𝑗,𝑍,𝑘,𝑥 𝜑,𝑎,𝑏,𝑗,𝑥 Allowed substitution hints: 𝜑(𝑘) 𝐿(𝑥,𝑗,𝑘,𝑎,𝑏) 𝑉(𝑥,𝑗,𝑎,𝑏) 𝑋(𝑗) 𝑍(𝑎,𝑏)

Proof of Theorem hoidmv1le Dummy variables 𝑖 𝑤 𝑧 𝑦 𝑙 ℎ are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		hoidmv1le.b	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵:𝑋⟶ℝ)
2		hoidmv1le.z	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑍 ∈ 𝑉)
3		snidg 4206	. . . . . . . . . . . 12 ⊢ (𝑍 ∈ 𝑉 → 𝑍 ∈ {𝑍})
4	2, 3	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑍 ∈ {𝑍})
5		hoidmv1le.x	. . . . . . . . . . 11 ⊢ 𝑋 = {𝑍}
6	4, 5	syl6eleqr 2712	. . . . . . . . . 10 ⊢ (𝜑 → 𝑍 ∈ 𝑋)
7	1, 6	ffvelrnd 6360	. . . . . . . . 9 ⊢ (𝜑 → (𝐵‘𝑍) ∈ ℝ)
8		hoidmv1le.a	. . . . . . . . . 10 ⊢ (𝜑 → 𝐴:𝑋⟶ℝ)
9	8, 6	ffvelrnd 6360	. . . . . . . . 9 ⊢ (𝜑 → (𝐴‘𝑍) ∈ ℝ)
10	7, 9	resubcld 10458	. . . . . . . 8 ⊢ (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ∈ ℝ)
11	10	rexrd 10089	. . . . . . 7 ⊢ (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ∈ ℝ^*)
12		pnfxr 10092	. . . . . . . 8 ⊢ +∞ ∈ ℝ^*
13	12	a1i 11	. . . . . . 7 ⊢ (𝜑 → +∞ ∈ ℝ^*)
14	10	ltpnfd 11955	. . . . . . 7 ⊢ (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) < +∞)
15	11, 13, 14	xrltled 39486	. . . . . 6 ⊢ (𝜑 → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ +∞)
16	15	ad2antrr 762	. . . . 5 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ +∞)
17		id 22	. . . . . . 7 ⊢ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞ → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞)
18	17	eqcomd 2628	. . . . . 6 ⊢ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞ → +∞ = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
19	18	adantl 482	. . . . 5 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → +∞ = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
20	16, 19	breqtrd 4679	. . . 4 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
21		simpl 473	. . . . 5 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)))
22		simpr 477	. . . . . 6 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞)
23		nnex 11026	. . . . . . . 8 ⊢ ℕ ∈ V
24	23	a1i 11	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ℕ ∈ V)
25		hoidmv1le.l	. . . . . . . . . . . 12 ⊢ 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))))
26	5	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑋 = {𝑍})
27		snfi 8038	. . . . . . . . . . . . . . 15 ⊢ {𝑍} ∈ Fin
28	27	a1i 11	. . . . . . . . . . . . . 14 ⊢ (𝜑 → {𝑍} ∈ Fin)
29	26, 28	eqeltrd 2701	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑋 ∈ Fin)
30	29	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑋 ∈ Fin)
31		ne0i 3921	. . . . . . . . . . . . . 14 ⊢ (𝑍 ∈ 𝑋 → 𝑋 ≠ ∅)
32	6, 31	syl 17	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑋 ≠ ∅)
33	32	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑋 ≠ ∅)
34		hoidmv1le.c	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐶:ℕ⟶(ℝ ↑_𝑚 𝑋))
35	34	ffvelrnda 6359	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ (ℝ ↑_𝑚 𝑋))
36		elmapi 7879	. . . . . . . . . . . . 13 ⊢ ((𝐶‘𝑗) ∈ (ℝ ↑_𝑚 𝑋) → (𝐶‘𝑗):𝑋⟶ℝ)
37	35, 36	syl 17	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗):𝑋⟶ℝ)
38		hoidmv1le.d	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐷:ℕ⟶(ℝ ↑_𝑚 𝑋))
39	38	ffvelrnda 6359	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ (ℝ ↑_𝑚 𝑋))
40		elmapi 7879	. . . . . . . . . . . . 13 ⊢ ((𝐷‘𝑗) ∈ (ℝ ↑_𝑚 𝑋) → (𝐷‘𝑗):𝑋⟶ℝ)
41	39, 40	syl 17	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗):𝑋⟶ℝ)
42	25, 30, 33, 37, 41	hoidmvn0val 40798	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) = ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))))
43	5	prodeq1i 14648	. . . . . . . . . . . 12 ⊢ ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))
44	43	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ∏𝑘 ∈ 𝑋 (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))))
45	2	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑍 ∈ 𝑉)
46	6	adantr 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑍 ∈ 𝑋)
47	37, 46	ffvelrnd 6360	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)‘𝑍) ∈ ℝ)
48	41, 46	ffvelrnd 6360	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐷‘𝑗)‘𝑍) ∈ ℝ)
49		volicore 40795	. . . . . . . . . . . . . 14 ⊢ ((((𝐶‘𝑗)‘𝑍) ∈ ℝ ∧ ((𝐷‘𝑗)‘𝑍) ∈ ℝ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℝ)
50	47, 48, 49	syl2anc 693	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℝ)
51	50	recnd 10068	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℂ)
52		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑍 → ((𝐶‘𝑗)‘𝑘) = ((𝐶‘𝑗)‘𝑍))
53		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 𝑍 → ((𝐷‘𝑗)‘𝑘) = ((𝐷‘𝑗)‘𝑍))
54	52, 53	oveq12d 6668	. . . . . . . . . . . . . 14 ⊢ (𝑘 = 𝑍 → (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
55	54	fveq2d 6195	. . . . . . . . . . . . 13 ⊢ (𝑘 = 𝑍 → (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
56	55	prodsn 14692	. . . . . . . . . . . 12 ⊢ ((𝑍 ∈ 𝑉 ∧ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) ∈ ℂ) → ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
57	45, 51, 56	syl2anc 693	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ∏𝑘 ∈ {𝑍} (vol‘(((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
58	42, 44, 57	3eqtrd 2660	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
59	58	mpteq2dva 4744	. . . . . . . . 9 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
60		fveq2 6191	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑘 = 𝑙 → (𝑎‘𝑘) = (𝑎‘𝑙))
61		fveq2 6191	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑘 = 𝑙 → (𝑏‘𝑘) = (𝑏‘𝑙))
62	60, 61	oveq12d 6668	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑘 = 𝑙 → ((𝑎‘𝑘)[,)(𝑏‘𝑘)) = ((𝑎‘𝑙)[,)(𝑏‘𝑙)))
63	62	fveq2d 6195	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 = 𝑙 → (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))
64	63	cbvprodv 14646	. . . . . . . . . . . . . . . . 17 ⊢ ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))
65		ifeq2 4091	. . . . . . . . . . . . . . . . 17 ⊢ (∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))) = ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))) → if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
66	64, 65	ax-mp 5	. . . . . . . . . . . . . . . 16 ⊢ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))
67	66	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 ∈ (ℝ ↑_𝑚 𝑥) ∧ 𝑏 ∈ (ℝ ↑_𝑚 𝑥)) → if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))) = if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
68	67	mpt2eq3ia 6720	. . . . . . . . . . . . . 14 ⊢ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘))))) = (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙)))))
69	68	mpteq2i 4741	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑘 ∈ 𝑥 (vol‘((𝑎‘𝑘)[,)(𝑏‘𝑘)))))) = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))))
70	25, 69	eqtri 2644	. . . . . . . . . . . 12 ⊢ 𝐿 = (𝑥 ∈ Fin ↦ (𝑎 ∈ (ℝ ↑_𝑚 𝑥), 𝑏 ∈ (ℝ ↑_𝑚 𝑥) ↦ if(𝑥 = ∅, 0, ∏𝑙 ∈ 𝑥 (vol‘((𝑎‘𝑙)[,)(𝑏‘𝑙))))))
71	70, 30, 37, 41	hoidmvcl 40796	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)) ∈ (0[,)+∞))
72		eqid 2622	. . . . . . . . . . 11 ⊢ (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))
73	71, 72	fmptd 6385	. . . . . . . . . 10 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))):ℕ⟶(0[,)+∞))
74		icossicc 12260	. . . . . . . . . . 11 ⊢ (0[,)+∞) ⊆ (0[,]+∞)
75	74	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → (0[,)+∞) ⊆ (0[,]+∞))
76	73, 75	fssd 6057	. . . . . . . . 9 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗))):ℕ⟶(0[,]+∞))
77	59, 76	feq1dd 39347	. . . . . . . 8 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))):ℕ⟶(0[,]+∞))
78	77	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))):ℕ⟶(0[,]+∞))
79	24, 78	sge0repnf 40603	. . . . . 6 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ ↔ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞))
80	22, 79	mpbird 247	. . . . 5 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ)
81	9	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐴‘𝑍) ∈ ℝ)
82	7	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐵‘𝑍) ∈ ℝ)
83		simplr 792	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝐴‘𝑍) < (𝐵‘𝑍))
84		eqid 2622	. . . . . . . . 9 ⊢ (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))
85	47, 84	fmptd 6385	. . . . . . . 8 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)):ℕ⟶ℝ)
86	85	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)):ℕ⟶ℝ)
87		eqid 2622	. . . . . . . . 9 ⊢ (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))
88	48, 87	fmptd 6385	. . . . . . . 8 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)):ℕ⟶ℝ)
89	88	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)):ℕ⟶ℝ)
90		hoidmv1le.s	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)))
91	5	eleq2i 2693	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑘 ∈ 𝑋 ↔ 𝑘 ∈ {𝑍})
92	91	biimpi 206	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑘 ∈ 𝑋 → 𝑘 ∈ {𝑍})
93		elsni 4194	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑘 ∈ {𝑍} → 𝑘 = 𝑍)
94	92, 93	syl 17	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑘 ∈ 𝑋 → 𝑘 = 𝑍)
95	94, 54	syl 17	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑘 ∈ 𝑋 → (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
96	95	rgen 2922	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ∀𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
97		ixpeq2 7922	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (∀𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
98	96, 97	ax-mp 5	. . . . . . . . . . . . . . . . . . . 20 ⊢ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
99	98	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑗 ∈ ℕ → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
100	99	iuneq2i 4539	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
101	100	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑘)[,)((𝐷‘𝑗)‘𝑘)) = ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
102	90, 101	sseqtrd 3641	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
103	102	adantr 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)) ⊆ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
104		id 22	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
105		eqidd 2623	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑥⟩})
106		opeq2 4403	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑦 = 𝑥 → ⟨𝑍, 𝑦⟩ = ⟨𝑍, 𝑥⟩)
107	106	sneqd 4189	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑦 = 𝑥 → {⟨𝑍, 𝑦⟩} = {⟨𝑍, 𝑥⟩})
108	107	eqeq2d 2632	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑦 = 𝑥 → ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} ↔ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑥⟩}))
109	108	rspcev 3309	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑥⟩}) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
110	104, 105, 109	syl2anc 693	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
111	110	adantl 482	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
112		elixpsn 7947	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑍 ∈ 𝑉 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
113	2, 112	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
114	113	adantr 481	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ↔ ∃𝑦 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
115	111, 114	mpbird 247	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
116	5	eqcomi 2631	. . . . . . . . . . . . . . . . . . . 20 ⊢ {𝑍} = 𝑋
117		ixpeq1 7919	. . . . . . . . . . . . . . . . . . . 20 ⊢ ({𝑍} = 𝑋 → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
118	116, 117	ax-mp 5	. . . . . . . . . . . . . . . . . . 19 ⊢ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍))
119		fveq2 6191	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑘 = 𝑍 → (𝐴‘𝑘) = (𝐴‘𝑍))
120	94, 119	syl 17	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑘 ∈ 𝑋 → (𝐴‘𝑘) = (𝐴‘𝑍))
121		fveq2 6191	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑘 = 𝑍 → (𝐵‘𝑘) = (𝐵‘𝑍))
122	94, 121	syl 17	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑘 ∈ 𝑋 → (𝐵‘𝑘) = (𝐵‘𝑍))
123	120, 122	oveq12d 6668	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑘 ∈ 𝑋 → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) = ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
124	123	eqcomd 2628	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑘 ∈ 𝑋 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
125	124	rgen 2922	. . . . . . . . . . . . . . . . . . . 20 ⊢ ∀𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘))
126		ixpeq2 7922	. . . . . . . . . . . . . . . . . . . 20 ⊢ (∀𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = ((𝐴‘𝑘)[,)(𝐵‘𝑘)) → X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
127	125, 126	ax-mp 5	. . . . . . . . . . . . . . . . . . 19 ⊢ X𝑘 ∈ 𝑋 ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘))
128	118, 127	eqtri 2644	. . . . . . . . . . . . . . . . . 18 ⊢ X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘))
129	128	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
130	129	adantr 481	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → X𝑘 ∈ {𝑍} ((𝐴‘𝑍)[,)(𝐵‘𝑍)) = X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
131	115, 130	eleqtrd 2703	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 ((𝐴‘𝑘)[,)(𝐵‘𝑘)))
132	103, 131	sseldd 3604	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
133		eliun 4524	. . . . . . . . . . . . . 14 ⊢ ({⟨𝑍, 𝑥⟩} ∈ ∪ 𝑗 ∈ ℕ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
134	132, 133	sylib 208	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
135		ixpeq1 7919	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑋 = {𝑍} → X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
136	5, 135	ax-mp 5	. . . . . . . . . . . . . . . . . . . . 21 ⊢ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
137	136	eleq2i 2693	. . . . . . . . . . . . . . . . . . . 20 ⊢ ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
138	137	biimpi 206	. . . . . . . . . . . . . . . . . . 19 ⊢ ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
139	138	adantl 482	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
140		elixpsn 7947	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑍 ∈ 𝑉 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
141	2, 140	syl 17	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
142	141	adantr 481	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ {𝑍} (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}))
143	139, 142	mpbid 222	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → ∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩})
144		opex 4932	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ⟨𝑍, 𝑥⟩ ∈ V
145	144	sneqr 4371	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → ⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩)
146	145	adantl 482	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → ⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩)
147		vex 3203	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ 𝑥 ∈ V
148	147	a1i 11	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → 𝑥 ∈ V)
149		opthg 4946	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑍 ∈ 𝑉 ∧ 𝑥 ∈ V) → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
150	2, 148, 149	syl2anc 693	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝜑 → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
151	150	adantr 481	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → (⟨𝑍, 𝑥⟩ = ⟨𝑍, 𝑦⟩ ↔ (𝑍 = 𝑍 ∧ 𝑥 = 𝑦)))
152	146, 151	mpbid 222	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → (𝑍 = 𝑍 ∧ 𝑥 = 𝑦))
153	152	simprd 479	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 = 𝑦)
154	153	3adant2 1080	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 = 𝑦)
155		simp2 1062	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
156	154, 155	eqeltrd 2701	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ∧ {⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩}) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
157	156	3exp 1264	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → (𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
158	157	adantr 481	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → (𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ({⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
159	158	rexlimdv 3030	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → (∃𝑦 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)){⟨𝑍, 𝑥⟩} = {⟨𝑍, 𝑦⟩} → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
160	143, 159	mpd 15	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
161	160	ex 450	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
162	161	ad2antrr 762	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∧ 𝑗 ∈ ℕ) → ({⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
163	162	reximdva 3017	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → (∃𝑗 ∈ ℕ {⟨𝑍, 𝑥⟩} ∈ X𝑘 ∈ 𝑋 (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) → ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
164	134, 163	mpd 15	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
165		eliun 4524	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∃𝑗 ∈ ℕ 𝑥 ∈ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
166	164, 165	sylibr 224	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))) → 𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
167	166	ralrimiva 2966	. . . . . . . . . 10 ⊢ (𝜑 → ∀𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
168		dfss3 3592	. . . . . . . . . 10 ⊢ (((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) ↔ ∀𝑥 ∈ ((𝐴‘𝑍)[,)(𝐵‘𝑍))𝑥 ∈ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
169	167, 168	sylibr 224	. . . . . . . . 9 ⊢ (𝜑 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
170		eqidd 2623	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍)))
171		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑗 = 𝑖 → (𝐶‘𝑗) = (𝐶‘𝑖))
172	171	fveq1d 6193	. . . . . . . . . . . . . 14 ⊢ (𝑗 = 𝑖 → ((𝐶‘𝑗)‘𝑍) = ((𝐶‘𝑖)‘𝑍))
173	172	adantl 482	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ ℕ) ∧ 𝑗 = 𝑖) → ((𝐶‘𝑗)‘𝑍) = ((𝐶‘𝑖)‘𝑍))
174		simpr 477	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → 𝑖 ∈ ℕ)
175		fvexd 6203	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝐶‘𝑖)‘𝑍) ∈ V)
176	170, 173, 174, 175	fvmptd 6288	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖) = ((𝐶‘𝑖)‘𝑍))
177		eqidd 2623	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)) = (𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍)))
178		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑗 = 𝑖 → (𝐷‘𝑗) = (𝐷‘𝑖))
179	178	fveq1d 6193	. . . . . . . . . . . . . 14 ⊢ (𝑗 = 𝑖 → ((𝐷‘𝑗)‘𝑍) = ((𝐷‘𝑖)‘𝑍))
180	179	adantl 482	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑖 ∈ ℕ) ∧ 𝑗 = 𝑖) → ((𝐷‘𝑗)‘𝑍) = ((𝐷‘𝑖)‘𝑍))
181		fvexd 6203	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝐷‘𝑖)‘𝑍) ∈ V)
182	177, 180, 174, 181	fvmptd 6288	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) = ((𝐷‘𝑖)‘𝑍))
183	176, 182	oveq12d 6668	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑖 ∈ ℕ) → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
184	183	iuneq2dv 4542	. . . . . . . . . 10 ⊢ (𝜑 → ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
185	172, 179	oveq12d 6668	. . . . . . . . . . . . 13 ⊢ (𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
186	185	cbviunv 4559	. . . . . . . . . . . 12 ⊢ ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))
187	186	eqcomi 2631	. . . . . . . . . . 11 ⊢ ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))
188	187	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ∪ 𝑖 ∈ ℕ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
189	184, 188	eqtr2d 2657	. . . . . . . . 9 ⊢ (𝜑 → ∪ 𝑗 ∈ ℕ (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
190	169, 189	sseqtrd 3641	. . . . . . . 8 ⊢ (𝜑 → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
191	190	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐴‘𝑍)[,)(𝐵‘𝑍)) ⊆ ∪ 𝑖 ∈ ℕ (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))
192		fvex 6201	. . . . . . . . . . . . . . 15 ⊢ ((𝐶‘𝑖)‘𝑍) ∈ V
193	172, 84, 192	fvmpt 6282	. . . . . . . . . . . . . 14 ⊢ (𝑖 ∈ ℕ → ((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖) = ((𝐶‘𝑖)‘𝑍))
194		fvex 6201	. . . . . . . . . . . . . . 15 ⊢ ((𝐷‘𝑖)‘𝑍) ∈ V
195	179, 87, 194	fvmpt 6282	. . . . . . . . . . . . . 14 ⊢ (𝑖 ∈ ℕ → ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) = ((𝐷‘𝑖)‘𝑍))
196	193, 195	oveq12d 6668	. . . . . . . . . . . . 13 ⊢ (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))
197	196	fveq2d 6195	. . . . . . . . . . . 12 ⊢ (𝑖 ∈ ℕ → (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))) = (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
198	197	mpteq2ia 4740	. . . . . . . . . . 11 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
199		eqcom 2629	. . . . . . . . . . . . . . . 16 ⊢ (𝑗 = 𝑖 ↔ 𝑖 = 𝑗)
200	199	imbi1i 339	. . . . . . . . . . . . . . 15 ⊢ ((𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))))
201		eqcom 2629	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) ↔ (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
202	201	imbi2i 326	. . . . . . . . . . . . . . 15 ⊢ ((𝑖 = 𝑗 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
203	200, 202	bitri 264	. . . . . . . . . . . . . 14 ⊢ ((𝑗 = 𝑖 → (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)) = (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) ↔ (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
204	185, 203	mpbi 220	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑗 → (((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)) = (((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))
205	204	fveq2d 6195	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍))) = (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
206	205	cbvmptv 4750	. . . . . . . . . . 11 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)((𝐷‘𝑖)‘𝑍)))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
207	198, 206	eqtri 2644	. . . . . . . . . 10 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖)))) = (𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))
208	207	fveq2i 6194	. . . . . . . . 9 ⊢ (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))
209	208	a1i 11	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
210		simpr 477	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ)
211	209, 210	eqeltrd 2701	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))) ∈ ℝ)
212		oveq1 6657	. . . . . . . . 9 ⊢ (𝑤 = 𝑧 → (𝑤 − (𝐴‘𝑍)) = (𝑧 − (𝐴‘𝑍)))
213	195	breq1d 4663	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧 ↔ ((𝐷‘𝑖)‘𝑍) ≤ 𝑧))
214	213, 195	ifbieq1d 4109	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 ∈ ℕ → if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧) = if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))
215	193, 214	oveq12d 6668	. . . . . . . . . . . . . . 15 ⊢ (𝑖 ∈ ℕ → (((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)) = (((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)))
216	215	fveq2d 6195	. . . . . . . . . . . . . 14 ⊢ (𝑖 ∈ ℕ → (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧))) = (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))))
217	216	mpteq2ia 4740	. . . . . . . . . . . . 13 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))))
218		fveq2 6191	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = ℎ → (𝐶‘𝑖) = (𝐶‘ℎ))
219	218	fveq1d 6193	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = ℎ → ((𝐶‘𝑖)‘𝑍) = ((𝐶‘ℎ)‘𝑍))
220		fveq2 6191	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑖 = ℎ → (𝐷‘𝑖) = (𝐷‘ℎ))
221	220	fveq1d 6193	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 = ℎ → ((𝐷‘𝑖)‘𝑍) = ((𝐷‘ℎ)‘𝑍))
222	221	breq1d 4663	. . . . . . . . . . . . . . . . 17 ⊢ (𝑖 = ℎ → (((𝐷‘𝑖)‘𝑍) ≤ 𝑧 ↔ ((𝐷‘ℎ)‘𝑍) ≤ 𝑧))
223	222, 221	ifbieq1d 4109	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 = ℎ → if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))
224	219, 223	oveq12d 6668	. . . . . . . . . . . . . . 15 ⊢ (𝑖 = ℎ → (((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)) = (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))
225	224	fveq2d 6195	. . . . . . . . . . . . . 14 ⊢ (𝑖 = ℎ → (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧))) = (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
226	225	cbvmptv 4750	. . . . . . . . . . . . 13 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝐶‘𝑖)‘𝑍)[,)if(((𝐷‘𝑖)‘𝑍) ≤ 𝑧, ((𝐷‘𝑖)‘𝑍), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
227	217, 226	eqtri 2644	. . . . . . . . . . . 12 ⊢ (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))))
228	227	a1i 11	. . . . . . . . . . 11 ⊢ (𝑤 = 𝑧 → (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))))
229		breq2 4657	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 = 𝑧 → (((𝐷‘ℎ)‘𝑍) ≤ 𝑤 ↔ ((𝐷‘ℎ)‘𝑍) ≤ 𝑧))
230		id 22	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 = 𝑧 → 𝑤 = 𝑧)
231	229, 230	ifbieq2d 4111	. . . . . . . . . . . . . . 15 ⊢ (𝑤 = 𝑧 → if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))
232	231	eqcomd 2628	. . . . . . . . . . . . . 14 ⊢ (𝑤 = 𝑧 → if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧) = if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))
233	232	oveq2d 6666	. . . . . . . . . . . . 13 ⊢ (𝑤 = 𝑧 → (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)) = (((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))
234	233	fveq2d 6195	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝑧 → (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧))) = (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))
235	234	mpteq2dv 4745	. . . . . . . . . . 11 ⊢ (𝑤 = 𝑧 → (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑧, ((𝐷‘ℎ)‘𝑍), 𝑧)))) = (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))
236	228, 235	eqtr2d 2657	. . . . . . . . . 10 ⊢ (𝑤 = 𝑧 → (ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))) = (𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))
237	236	fveq2d 6195	. . . . . . . . 9 ⊢ (𝑤 = 𝑧 → (Σ^{^}‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))) = (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧))))))
238	212, 237	breq12d 4666	. . . . . . . 8 ⊢ (𝑤 = 𝑧 → ((𝑤 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤))))) ↔ (𝑧 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))))
239	238	cbvrabv 3199	. . . . . . 7 ⊢ {𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))} = {𝑧 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑧 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)if(((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖) ≤ 𝑧, ((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖), 𝑧)))))}
240		eqid 2622	. . . . . . 7 ⊢ sup({𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))}, ℝ, < ) = sup({𝑤 ∈ ((𝐴‘𝑍)[,](𝐵‘𝑍)) ∣ (𝑤 − (𝐴‘𝑍)) ≤ (Σ^{^}‘(ℎ ∈ ℕ ↦ (vol‘(((𝐶‘ℎ)‘𝑍)[,)if(((𝐷‘ℎ)‘𝑍) ≤ 𝑤, ((𝐷‘ℎ)‘𝑍), 𝑤)))))}, ℝ, < )
241	81, 82, 83, 86, 89, 191, 211, 239, 240	hoidmv1lelem3 40807	. . . . . 6 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑖 ∈ ℕ ↦ (vol‘(((𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)‘𝑍))‘𝑖)[,)((𝑗 ∈ ℕ ↦ ((𝐷‘𝑗)‘𝑍))‘𝑖))))))
242	241, 209	breqtrd 4679	. . . . 5 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) ∈ ℝ) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
243	21, 80, 242	syl2anc 693	. . . 4 ⊢ (((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) ∧ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))) = +∞) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
244	20, 243	pm2.61dan 832	. . 3 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
245	25, 29, 32, 8, 1	hoidmvn0val 40798	. . . . . . 7 ⊢ (𝜑 → (𝐴(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
246	26	prodeq1d 14651	. . . . . . 7 ⊢ (𝜑 → ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
247		volicore 40795	. . . . . . . . . 10 ⊢ (((𝐴‘𝑍) ∈ ℝ ∧ (𝐵‘𝑍) ∈ ℝ) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℝ)
248	9, 7, 247	syl2anc 693	. . . . . . . . 9 ⊢ (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℝ)
249	248	recnd 10068	. . . . . . . 8 ⊢ (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℂ)
250	119, 121	oveq12d 6668	. . . . . . . . . 10 ⊢ (𝑘 = 𝑍 → ((𝐴‘𝑘)[,)(𝐵‘𝑘)) = ((𝐴‘𝑍)[,)(𝐵‘𝑍)))
251	250	fveq2d 6195	. . . . . . . . 9 ⊢ (𝑘 = 𝑍 → (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
252	251	prodsn 14692	. . . . . . . 8 ⊢ ((𝑍 ∈ 𝑉 ∧ (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) ∈ ℂ) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
253	2, 249, 252	syl2anc 693	. . . . . . 7 ⊢ (𝜑 → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
254	245, 246, 253	3eqtrd 2660	. . . . . 6 ⊢ (𝜑 → (𝐴(𝐿‘𝑋)𝐵) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
255	254	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
256		volico 40200	. . . . . . 7 ⊢ (((𝐴‘𝑍) ∈ ℝ ∧ (𝐵‘𝑍) ∈ ℝ) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
257	9, 7, 256	syl2anc 693	. . . . . 6 ⊢ (𝜑 → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
258	257	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
259		iftrue 4092	. . . . . 6 ⊢ ((𝐴‘𝑍) < (𝐵‘𝑍) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
260	259	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
261	255, 258, 260	3eqtrd 2660	. . . 4 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = ((𝐵‘𝑍) − (𝐴‘𝑍)))
262	59	fveq2d 6195	. . . . 5 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
263	262	adantr 481	. . . 4 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍))))))
264	261, 263	breq12d 4666	. . 3 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → ((𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))) ↔ ((𝐵‘𝑍) − (𝐴‘𝑍)) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘(((𝐶‘𝑗)‘𝑍)[,)((𝐷‘𝑗)‘𝑍)))))))
265	244, 264	mpbird 247	. 2 ⊢ ((𝜑 ∧ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
266	245	adantr 481	. . . 4 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
267	246	adantr 481	. . . 4 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ 𝑋 (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))))
268	253	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))))
269	257	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (vol‘((𝐴‘𝑍)[,)(𝐵‘𝑍))) = if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0))
270		iffalse 4095	. . . . . 6 ⊢ (¬ (𝐴‘𝑍) < (𝐵‘𝑍) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = 0)
271	270	adantl 482	. . . . 5 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → if((𝐴‘𝑍) < (𝐵‘𝑍), ((𝐵‘𝑍) − (𝐴‘𝑍)), 0) = 0)
272	268, 269, 271	3eqtrd 2660	. . . 4 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → ∏𝑘 ∈ {𝑍} (vol‘((𝐴‘𝑘)[,)(𝐵‘𝑘))) = 0)
273	266, 267, 272	3eqtrd 2660	. . 3 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) = 0)
274	23	a1i 11	. . . . 5 ⊢ (𝜑 → ℕ ∈ V)
275	274, 76	sge0ge0 40601	. . . 4 ⊢ (𝜑 → 0 ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
276	275	adantr 481	. . 3 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → 0 ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
277	273, 276	eqbrtrd 4675	. 2 ⊢ ((𝜑 ∧ ¬ (𝐴‘𝑍) < (𝐵‘𝑍)) → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))
278	265, 277	pm2.61dan 832	1 ⊢ (𝜑 → (𝐴(𝐿‘𝑋)𝐵) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ ((𝐶‘𝑗)(𝐿‘𝑋)(𝐷‘𝑗)))))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∀wral 2912 ∃wrex 2913 {crab 2916 Vcvv 3200 ⊆ wss 3574 ∅c0 3915 ifcif 4086 {csn 4177 ⟨cop 4183 ∪ ciun 4520 class class class wbr 4653 ↦ cmpt 4729 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 ↦ cmpt2 6652 ↑_𝑚 cmap 7857 Xcixp 7908 Fincfn 7955 supcsup 8346 ℂcc 9934 ℝcr 9935 0cc0 9936 +∞cpnf 10071 ℝ^*cxr 10073 < clt 10074 ≤ cle 10075 − cmin 10266 ℕcn 11020 [,)cico 12177 [,]cicc 12178 ∏cprod 14635 volcvol 23232 Σ^{^}csumge0 40579

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-inf2 8538 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-fal 1489 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-se 5074 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-isom 5897 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-map 7859 df-pm 7860 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fi 8317 df-sup 8348 df-inf 8349 df-oi 8415 df-card 8765 df-cda 8990 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-n0 11293 df-z 11378 df-uz 11688 df-q 11789 df-rp 11833 df-xneg 11946 df-xadd 11947 df-xmul 11948 df-ioo 12179 df-ico 12181 df-icc 12182 df-fz 12327 df-fzo 12466 df-fl 12593 df-seq 12802 df-exp 12861 df-hash 13118 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-clim 14219 df-rlim 14220 df-sum 14417 df-prod 14636 df-rest 16083 df-topgen 16104 df-psmet 19738 df-xmet 19739 df-met 19740 df-bl 19741 df-mopn 19742 df-top 20699 df-topon 20716 df-bases 20750 df-cmp 21190 df-ovol 23233 df-vol 23234 df-sumge0 40580

This theorem is referenced by: hoidmvle 40814

W3C validator