hoidmv1lelem1 - Mathbox for Glauco Siliprandi

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Theorem hoidmv1lelem1 39481

Description: The supremum of 𝑈 belongs to 𝑈. This is the last part of step (a) and the whole step (b) in the proof of Lemma 114B of [Fremlin1] p. 23. (Contributed by Glauco Siliprandi, 21-Nov-2020.)

**Hypotheses**
Ref	Expression
hoidmv1lelem1.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
hoidmv1lelem1.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
hoidmv1lelem1.l	⊢ (𝜑 → 𝐴 < 𝐵)
hoidmv1lelem1.c	⊢ (𝜑 → 𝐶:ℕ⟶ℝ)
hoidmv1lelem1.d	⊢ (𝜑 → 𝐷:ℕ⟶ℝ)
hoidmv1lelem1.r	⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) ∈ ℝ)
hoidmv1lelem1.u	⊢ 𝑈 = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))}
hoidmv1lelem1.s	⊢ 𝑆 = sup(𝑈, ℝ, < )

**Assertion**
Ref	Expression
hoidmv1lelem1	⊢ (𝜑 → (𝑆 ∈ 𝑈 ∧ 𝐴 ∈ 𝑈 ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥))

Distinct variable groups: 𝐴,𝑗,𝑧 𝑦,𝐴 𝑥,𝐵,𝑦 𝑧,𝐵 𝑧,𝐶 𝑧,𝐷 𝑆,𝑗,𝑧 𝑈,𝑗,𝑧 𝑥,𝑈,𝑦 𝜑,𝑗,𝑧 Allowed substitution hints: 𝜑(𝑥,𝑦) 𝐴(𝑥) 𝐵(𝑗) 𝐶(𝑥,𝑦,𝑗) 𝐷(𝑥,𝑦,𝑗) 𝑆(𝑥,𝑦)

**Proof of Theorem hoidmv1lelem1**
Step	Hyp	Ref	Expression
1		hoidmv1lelem1.s	. . . . . 6 ⊢ 𝑆 = sup(𝑈, ℝ, < )
2		hoidmv1lelem1.a	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3		hoidmv1lelem1.b	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ)
4		hoidmv1lelem1.u	. . . . . . . . 9 ⊢ 𝑈 = {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))}
5		ssrab2 3650	. . . . . . . . 9 ⊢ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))} ⊆ (𝐴[,]𝐵)
6	4, 5	eqsstri 3598	. . . . . . . 8 ⊢ 𝑈 ⊆ (𝐴[,]𝐵)
7	6	a1i 11	. . . . . . 7 ⊢ (𝜑 → 𝑈 ⊆ (𝐴[,]𝐵))
8	2	rexrd 9968	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
9	3	rexrd 9968	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
10		hoidmv1lelem1.l	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐴 < 𝐵)
11	2, 3, 10	ltled 10064	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
12		lbicc2 12159	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵))
13	8, 9, 11, 12	syl3anc 1318	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵))
14	2	recnd 9947	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐴 ∈ ℂ)
15	14	subidd 10259	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐴 − 𝐴) = 0)
16		nfv 1830	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑗𝜑
17		nnex 10903	. . . . . . . . . . . . . 14 ⊢ ℕ ∈ V
18	17	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → ℕ ∈ V)
19		volf 23104	. . . . . . . . . . . . . . 15 ⊢ vol:dom vol⟶(0[,]+∞)
20	19	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → vol:dom vol⟶(0[,]+∞))
21		hoidmv1lelem1.c	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐶:ℕ⟶ℝ)
22	21	ffvelrnda 6267	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ ℝ)
23		hoidmv1lelem1.d	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝐷:ℕ⟶ℝ)
24	23	ffvelrnda 6267	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ ℝ)
25	2	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝐴 ∈ ℝ)
26	24, 25	ifcld 4081	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴) ∈ ℝ)
27	26	rexrd 9968	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴) ∈ ℝ^*)
28		icombl 23139	. . . . . . . . . . . . . . 15 ⊢ (((𝐶‘𝑗) ∈ ℝ ∧ if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴) ∈ ℝ^*) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)) ∈ dom vol)
29	22, 27, 28	syl2anc 691	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)) ∈ dom vol)
30	20, 29	ffvelrnd 6268	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))) ∈ (0[,]+∞))
31	16, 18, 30	sge0ge0mpt 39331	. . . . . . . . . . . 12 ⊢ (𝜑 → 0 ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))))))
32	15, 31	eqbrtrd 4605	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐴 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))))))
33	13, 32	jca 553	. . . . . . . . . 10 ⊢ (𝜑 → (𝐴 ∈ (𝐴[,]𝐵) ∧ (𝐴 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)))))))
34		oveq1 6556	. . . . . . . . . . . 12 ⊢ (𝑧 = 𝐴 → (𝑧 − 𝐴) = (𝐴 − 𝐴))
35		breq2 4587	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = 𝐴 → ((𝐷‘𝑗) ≤ 𝑧 ↔ (𝐷‘𝑗) ≤ 𝐴))
36		id 22	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = 𝐴 → 𝑧 = 𝐴)
37	35, 36	ifbieq2d 4061	. . . . . . . . . . . . . . . 16 ⊢ (𝑧 = 𝐴 → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))
38	37	oveq2d 6565	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = 𝐴 → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) = ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)))
39	38	fveq2d 6107	. . . . . . . . . . . . . 14 ⊢ (𝑧 = 𝐴 → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) = (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))))
40	39	mpteq2dv 4673	. . . . . . . . . . . . 13 ⊢ (𝑧 = 𝐴 → (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)))))
41	40	fveq2d 6107	. . . . . . . . . . . 12 ⊢ (𝑧 = 𝐴 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴))))))
42	34, 41	breq12d 4596	. . . . . . . . . . 11 ⊢ (𝑧 = 𝐴 → ((𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ↔ (𝐴 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)))))))
43	42	elrab 3331	. . . . . . . . . 10 ⊢ (𝐴 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))} ↔ (𝐴 ∈ (𝐴[,]𝐵) ∧ (𝐴 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝐴, (𝐷‘𝑗), 𝐴)))))))
44	33, 43	sylibr 223	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))})
45	44, 4	syl6eleqr 2699	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ 𝑈)
46		ne0i 3880	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑈 → 𝑈 ≠ ∅)
47	45, 46	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑈 ≠ ∅)
48	2, 3, 7, 47	supicc 12191	. . . . . 6 ⊢ (𝜑 → sup(𝑈, ℝ, < ) ∈ (𝐴[,]𝐵))
49	1, 48	syl5eqel 2692	. . . . 5 ⊢ (𝜑 → 𝑆 ∈ (𝐴[,]𝐵))
50	1	a1i 11	. . . . . . 7 ⊢ (𝜑 → 𝑆 = sup(𝑈, ℝ, < ))
51		nfv 1830	. . . . . . . . 9 ⊢ Ⅎ𝑧𝜑
52	2, 3	iccssred 38574	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
53	7, 52	sstrd 3578	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑈 ⊆ ℝ)
54	53	sselda 3568	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ∈ ℝ)
55		nfv 1830	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑗(𝜑 ∧ 𝑧 ∈ 𝑈)
56	17	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ℕ ∈ V)
57	19	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → vol:dom vol⟶(0[,]+∞))
58	22	adantlr 747	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ ℝ)
59	24	adantlr 747	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ ℝ)
60	54	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → 𝑧 ∈ ℝ)
61	59, 60	ifcld 4081	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ∈ ℝ)
62	61	rexrd 9968	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ∈ ℝ^*)
63		icombl 23139	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐶‘𝑗) ∈ ℝ ∧ if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ∈ ℝ^*) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ∈ dom vol)
64	58, 62, 63	syl2anc 691	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ∈ dom vol)
65	57, 64	ffvelrnd 6268	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) ∈ (0[,]+∞))
66	55, 56, 65	sge0xrclmpt 39321	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ∈ ℝ^*)
67		pnfxr 9971	. . . . . . . . . . . . . . . 16 ⊢ +∞ ∈ ℝ^*
68	67	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → +∞ ∈ ℝ^*)
69		hoidmv1lelem1.r	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) ∈ ℝ)
70	69	rexrd 9968	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) ∈ ℝ^*)
71	70	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) ∈ ℝ^*)
72	24	rexrd 9968	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ ℝ^*)
73		icombl 23139	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐶‘𝑗) ∈ ℝ ∧ (𝐷‘𝑗) ∈ ℝ^*) → ((𝐶‘𝑗)[,)(𝐷‘𝑗)) ∈ dom vol)
74	22, 72, 73	syl2anc 691	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)(𝐷‘𝑗)) ∈ dom vol)
75	20, 74	ffvelrnd 6268	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))) ∈ (0[,]+∞))
76	75	adantlr 747	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))) ∈ (0[,]+∞))
77	74	adantlr 747	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)(𝐷‘𝑗)) ∈ dom vol)
78	22	rexrd 9968	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ ℝ^*)
79	78	adantlr 747	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ∈ ℝ^*)
80	72	adantlr 747	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (𝐷‘𝑗) ∈ ℝ^*)
81	22	leidd 10473	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ≤ (𝐶‘𝑗))
82	81	adantlr 747	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (𝐶‘𝑗) ≤ (𝐶‘𝑗))
83		min1 11894	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐷‘𝑗) ∈ ℝ ∧ 𝑧 ∈ ℝ) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ (𝐷‘𝑗))
84	59, 60, 83	syl2anc 691	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ (𝐷‘𝑗))
85		icossico 12114	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝐶‘𝑗) ∈ ℝ^* ∧ (𝐷‘𝑗) ∈ ℝ^*) ∧ ((𝐶‘𝑗) ≤ (𝐶‘𝑗) ∧ if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ (𝐷‘𝑗))) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗)))
86	79, 80, 82, 84, 85	syl22anc 1319	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗)))
87		volss 23108	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)(𝐷‘𝑗)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗))) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) ≤ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))
88	64, 77, 86, 87	syl3anc 1318	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) ≤ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))
89	55, 56, 65, 76, 88	sge0lempt 39303	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))))
90	69	ltpnfd 11831	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) < +∞)
91	90	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))) < +∞)
92	66, 71, 68, 89, 91	xrlelttrd 11867	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) < +∞)
93	66, 68, 92	xrltned 38514	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ≠ +∞)
94	93	neneqd 2787	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) = +∞)
95		eqid 2610	. . . . . . . . . . . . . . 15 ⊢ (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))
96	65, 95	fmptd 6292	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))):ℕ⟶(0[,]+∞))
97	56, 96	sge0repnf 39279	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ∈ ℝ ↔ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) = +∞))
98	94, 97	mpbird 246	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ∈ ℝ)
99	2	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝐴 ∈ ℝ)
100	98, 99	readdcld 9948	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) + 𝐴) ∈ ℝ)
101	52, 49	sseldd 3569	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝜑 → 𝑆 ∈ ℝ)
102	101	adantr 480	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → 𝑆 ∈ ℝ)
103	24, 102	ifcld 4081	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ∈ ℝ)
104	103	rexrd 9968	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ∈ ℝ^*)
105		icombl 23139	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐶‘𝑗) ∈ ℝ ∧ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ∈ ℝ^*) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ∈ dom vol)
106	22, 104, 105	syl2anc 691	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ∈ dom vol)
107	20, 106	ffvelrnd 6268	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) ∈ (0[,]+∞))
108	16, 18, 107	sge0xrclmpt 39321	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ∈ ℝ^*)
109	67	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → +∞ ∈ ℝ^*)
110		min1 11894	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝐷‘𝑗) ∈ ℝ ∧ 𝑆 ∈ ℝ) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ≤ (𝐷‘𝑗))
111	24, 102, 110	syl2anc 691	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ≤ (𝐷‘𝑗))
112		icossico 12114	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝐶‘𝑗) ∈ ℝ^* ∧ (𝐷‘𝑗) ∈ ℝ^*) ∧ ((𝐶‘𝑗) ≤ (𝐶‘𝑗) ∧ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ≤ (𝐷‘𝑗))) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗)))
113	78, 72, 81, 111, 112	syl22anc 1319	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗)))
114		volss 23108	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)(𝐷‘𝑗)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ⊆ ((𝐶‘𝑗)[,)(𝐷‘𝑗))) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) ≤ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))
115	106, 74, 113, 114	syl3anc 1318	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) ≤ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))
116	16, 18, 107, 75, 115	sge0lempt 39303	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)(𝐷‘𝑗))))))
117	108, 70, 109, 116, 90	xrlelttrd 11867	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) < +∞)
118	108, 109, 117	xrltned 38514	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ≠ +∞)
119	118	neneqd 2787	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) = +∞)
120		eqid 2610	. . . . . . . . . . . . . . . 16 ⊢ (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))
121	107, 120	fmptd 6292	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))):ℕ⟶(0[,]+∞))
122	18, 121	sge0repnf 39279	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ∈ ℝ ↔ ¬ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) = +∞))
123	119, 122	mpbird 246	. . . . . . . . . . . . 13 ⊢ (𝜑 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ∈ ℝ)
124	123, 2	readdcld 9948	. . . . . . . . . . . 12 ⊢ (𝜑 → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴) ∈ ℝ)
125	124	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴) ∈ ℝ)
126	4	eleq2i 2680	. . . . . . . . . . . . . . . 16 ⊢ (𝑧 ∈ 𝑈 ↔ 𝑧 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))})
127	126	biimpi 205	. . . . . . . . . . . . . . 15 ⊢ (𝑧 ∈ 𝑈 → 𝑧 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))})
128	127	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))})
129		rabid 3095	. . . . . . . . . . . . . 14 ⊢ (𝑧 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))} ↔ (𝑧 ∈ (𝐴[,]𝐵) ∧ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))))
130	128, 129	sylib 207	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (𝑧 ∈ (𝐴[,]𝐵) ∧ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))))
131	130	simprd 478	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))))
132	54, 99, 98	lesubaddd 10503	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ((𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ↔ 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) + 𝐴)))
133	131, 132	mpbid 221	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) + 𝐴))
134	123	adantr 480	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ∈ ℝ)
135	107	adantlr 747	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) ∈ (0[,]+∞))
136	106	adantlr 747	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ∈ dom vol)
137	104	adantlr 747	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ∈ ℝ^*)
138	61	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ∈ ℝ)
139		eqidd 2611	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → (𝐷‘𝑗) = (𝐷‘𝑗))
140		iftrue 4042	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐷‘𝑗) ≤ 𝑧 → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = (𝐷‘𝑗))
141	140	adantl 481	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = (𝐷‘𝑗))
142	59	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → (𝐷‘𝑗) ∈ ℝ)
143	60	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → 𝑧 ∈ ℝ)
144	101	ad3antrrr 762	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → 𝑆 ∈ ℝ)
145		simpr 476	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → (𝐷‘𝑗) ≤ 𝑧)
146	53	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑈 ⊆ ℝ)
147	47	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑈 ≠ ∅)
148	2, 3	jca 553	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → (𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ))
149		iccsupr 12137	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) ∧ 𝑈 ⊆ (𝐴[,]𝐵) ∧ 𝐴 ∈ 𝑈) → (𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥))
150	148, 7, 45, 149	syl3anc 1318	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝜑 → (𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥))
151	150	simp3d 1068	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥)
152	151	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥)
153	128, 126	sylibr 223	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ∈ 𝑈)
154		suprub 10863	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥) ∧ 𝑧 ∈ 𝑈) → 𝑧 ≤ sup(𝑈, ℝ, < ))
155	146, 147, 152, 153, 154	syl31anc 1321	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ≤ sup(𝑈, ℝ, < ))
156	155, 1	syl6breqr 4625	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ≤ 𝑆)
157	156	ad2antrr 758	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → 𝑧 ≤ 𝑆)
158	142, 143, 144, 145, 157	letrd 10073	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → (𝐷‘𝑗) ≤ 𝑆)
159	158	iftrued 4044	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) = (𝐷‘𝑗))
160	139, 141, 159	3eqtr4d 2654	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
161	138, 160	eqled 10019	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
162	60	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → 𝑧 ∈ ℝ)
163	59	adantr 480	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → (𝐷‘𝑗) ∈ ℝ)
164		simpr 476	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → ¬ (𝐷‘𝑗) ≤ 𝑧)
165	162, 163	ltnled 10063	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → (𝑧 < (𝐷‘𝑗) ↔ ¬ (𝐷‘𝑗) ≤ 𝑧))
166	164, 165	mpbird 246	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → 𝑧 < (𝐷‘𝑗))
167	162, 163, 166	ltled 10064	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → 𝑧 ≤ (𝐷‘𝑗))
168	167	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ (𝐷‘𝑗) ≤ 𝑆) → 𝑧 ≤ (𝐷‘𝑗))
169		iffalse 4045	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ (𝐷‘𝑗) ≤ 𝑧 → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = 𝑧)
170	169	ad2antlr 759	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = 𝑧)
171		iftrue 4042	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐷‘𝑗) ≤ 𝑆 → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) = (𝐷‘𝑗))
172	171	adantl 481	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) = (𝐷‘𝑗))
173	170, 172	breq12d 4596	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ (𝐷‘𝑗) ≤ 𝑆) → (if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ↔ 𝑧 ≤ (𝐷‘𝑗)))
174	168, 173	mpbird 246	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
175	156	ad3antrrr 762	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ ¬ (𝐷‘𝑗) ≤ 𝑆) → 𝑧 ≤ 𝑆)
176	169	ad2antlr 759	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ ¬ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = 𝑧)
177		iffalse 4045	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ (𝐷‘𝑗) ≤ 𝑆 → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) = 𝑆)
178	177	adantl 481	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ ¬ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) = 𝑆)
179	176, 178	breq12d 4596	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ ¬ (𝐷‘𝑗) ≤ 𝑆) → (if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ↔ 𝑧 ≤ 𝑆))
180	175, 179	mpbird 246	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) ∧ ¬ (𝐷‘𝑗) ≤ 𝑆) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
181	174, 180	pm2.61dan 828	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) ∧ ¬ (𝐷‘𝑗) ≤ 𝑧) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
182	161, 181	pm2.61dan 828	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
183		icossico 12114	. . . . . . . . . . . . . . 15 ⊢ ((((𝐶‘𝑗) ∈ ℝ^* ∧ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆) ∈ ℝ^*) ∧ ((𝐶‘𝑗) ≤ (𝐶‘𝑗) ∧ if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) ≤ if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))
184	79, 137, 82, 182, 183	syl22anc 1319	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))
185		volss 23108	. . . . . . . . . . . . . 14 ⊢ ((((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)) ∈ dom vol ∧ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) ⊆ ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) ≤ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))
186	64, 136, 184, 185	syl3anc 1318	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑧 ∈ 𝑈) ∧ 𝑗 ∈ ℕ) → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) ≤ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))
187	55, 56, 65, 135, 186	sge0lempt 39303	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))))
188	98, 134, 99, 187	leadd1dd 10520	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) + 𝐴) ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴))
189	54, 100, 125, 133, 188	letrd 10073	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑈) → 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴))
190	189	ex 449	. . . . . . . . 9 ⊢ (𝜑 → (𝑧 ∈ 𝑈 → 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴)))
191	51, 190	ralrimi 2940	. . . . . . . 8 ⊢ (𝜑 → ∀𝑧 ∈ 𝑈 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴))
192		suprleub 10866	. . . . . . . . 9 ⊢ (((𝑈 ⊆ ℝ ∧ 𝑈 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥) ∧ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴) ∈ ℝ) → (sup(𝑈, ℝ, < ) ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴) ↔ ∀𝑧 ∈ 𝑈 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴)))
193	53, 47, 151, 124, 192	syl31anc 1321	. . . . . . . 8 ⊢ (𝜑 → (sup(𝑈, ℝ, < ) ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴) ↔ ∀𝑧 ∈ 𝑈 𝑧 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴)))
194	191, 193	mpbird 246	. . . . . . 7 ⊢ (𝜑 → sup(𝑈, ℝ, < ) ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴))
195	50, 194	eqbrtrd 4605	. . . . . 6 ⊢ (𝜑 → 𝑆 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴))
196	101, 2, 123	lesubaddd 10503	. . . . . 6 ⊢ (𝜑 → ((𝑆 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) ↔ 𝑆 ≤ ((Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))) + 𝐴)))
197	195, 196	mpbird 246	. . . . 5 ⊢ (𝜑 → (𝑆 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))))
198	49, 197	jca 553	. . . 4 ⊢ (𝜑 → (𝑆 ∈ (𝐴[,]𝐵) ∧ (𝑆 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))))))
199		oveq1 6556	. . . . . 6 ⊢ (𝑧 = 𝑆 → (𝑧 − 𝐴) = (𝑆 − 𝐴))
200		breq2 4587	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑆 → ((𝐷‘𝑗) ≤ 𝑧 ↔ (𝐷‘𝑗) ≤ 𝑆))
201		id 22	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑆 → 𝑧 = 𝑆)
202	200, 201	ifbieq2d 4061	. . . . . . . . . 10 ⊢ (𝑧 = 𝑆 → if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧) = if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))
203	202	oveq2d 6565	. . . . . . . . 9 ⊢ (𝑧 = 𝑆 → ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)) = ((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))
204	203	fveq2d 6107	. . . . . . . 8 ⊢ (𝑧 = 𝑆 → (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))) = (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))
205	204	mpteq2dv 4673	. . . . . . 7 ⊢ (𝑧 = 𝑆 → (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))) = (𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))))
206	205	fveq2d 6107	. . . . . 6 ⊢ (𝑧 = 𝑆 → (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) = (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆))))))
207	199, 206	breq12d 4596	. . . . 5 ⊢ (𝑧 = 𝑆 → ((𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧))))) ↔ (𝑆 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))))))
208	207	elrab 3331	. . . 4 ⊢ (𝑆 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))} ↔ (𝑆 ∈ (𝐴[,]𝐵) ∧ (𝑆 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑆, (𝐷‘𝑗), 𝑆)))))))
209	198, 208	sylibr 223	. . 3 ⊢ (𝜑 → 𝑆 ∈ {𝑧 ∈ (𝐴[,]𝐵) ∣ (𝑧 − 𝐴) ≤ (Σ^{^}‘(𝑗 ∈ ℕ ↦ (vol‘((𝐶‘𝑗)[,)if((𝐷‘𝑗) ≤ 𝑧, (𝐷‘𝑗), 𝑧)))))})
210	209, 4	syl6eleqr 2699	. 2 ⊢ (𝜑 → 𝑆 ∈ 𝑈)
211	210, 45, 151	3jca 1235	1 ⊢ (𝜑 → (𝑆 ∈ 𝑈 ∧ 𝐴 ∈ 𝑈 ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ 𝑈 𝑦 ≤ 𝑥))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ∀wral 2896 ∃wrex 2897 {crab 2900 Vcvv 3173 ⊆ wss 3540 ∅c0 3874 ifcif 4036 class class class wbr 4583 ↦ cmpt 4643 dom cdm 5038 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 supcsup 8229 ℝcr 9814 0cc0 9815 + caddc 9818 +∞cpnf 9950 ℝ^*cxr 9952 < clt 9953 ≤ cle 9954 − cmin 10145 ℕcn 10897 [,)cico 12048 [,]cicc 12049 volcvol 23039 Σ^{^}csumge0 39255

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-of 6795 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-map 7746 df-pm 7747 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-inf 8232 df-oi 8298 df-card 8648 df-cda 8873 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-q 11665 df-rp 11709 df-xadd 11823 df-ioo 12050 df-ico 12052 df-icc 12053 df-fz 12198 df-fzo 12335 df-fl 12455 df-seq 12664 df-exp 12723 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-rlim 14068 df-sum 14265 df-xmet 19560 df-met 19561 df-ovol 23040 df-vol 23041 df-sumge0 39256

This theorem is referenced by: hoidmv1lelem3 39483

W3C validator