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Theorem ftc1a 25892

Description: The Fundamental Theorem of Calculus, part one. The function 𝐺 formed by varying the right endpoint of an integral of 𝐹 is continuous if 𝐹 is integrable. (Contributed by Mario Carneiro, 1-Sep-2014.)

**Hypotheses**
Ref	Expression
ftc1.g	⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
ftc1.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
ftc1.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
ftc1.le	⊢ (𝜑 → 𝐴 ≤ 𝐵)
ftc1.s	⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
ftc1.d	⊢ (𝜑 → 𝐷 ⊆ ℝ)
ftc1.i	⊢ (𝜑 → 𝐹 ∈ 𝐿¹)
ftc1a.f	⊢ (𝜑 → 𝐹:𝐷⟶ℂ)

**Assertion**
Ref	Expression
ftc1a	⊢ (𝜑 → 𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ))

Distinct variable groups: 𝑥,𝑡,𝐷 𝑡,𝐴,𝑥 𝑡,𝐵,𝑥 𝜑,𝑡,𝑥 𝑡,𝐹,𝑥 Allowed substitution hints: 𝐺(𝑥,𝑡)

Proof of Theorem ftc1a Dummy variables 𝑠 𝑢 𝑤 𝑦 𝑧 𝑟 𝑑 𝑒 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ftc1.g	. . 3 ⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
2		ftc1.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3		ftc1.b	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ)
4		ftc1.le	. . 3 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
5		ftc1.s	. . 3 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
6		ftc1.d	. . 3 ⊢ (𝜑 → 𝐷 ⊆ ℝ)
7		ftc1.i	. . 3 ⊢ (𝜑 → 𝐹 ∈ 𝐿¹)
8		ftc1a.f	. . 3 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
9	1, 2, 3, 4, 5, 6, 7, 8	ftc1lem2 25891	. 2 ⊢ (𝜑 → 𝐺:(𝐴[,]𝐵)⟶ℂ)
10		fvexd 6906	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑒 ∈ ℝ⁺) ∧ 𝑤 ∈ 𝐷) → (𝐹‘𝑤) ∈ V)
11	8	feqmptd 6960	. . . . . . . . 9 ⊢ (𝜑 → 𝐹 = (𝑤 ∈ 𝐷 ↦ (𝐹‘𝑤)))
12	11, 7	eqeltrrd 2833	. . . . . . . 8 ⊢ (𝜑 → (𝑤 ∈ 𝐷 ↦ (𝐹‘𝑤)) ∈ 𝐿¹)
13	12	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → (𝑤 ∈ 𝐷 ↦ (𝐹‘𝑤)) ∈ 𝐿¹)
14		simpr 484	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → 𝑒 ∈ ℝ⁺)
15	10, 13, 14	itgcn 25694	. . . . . 6 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → ∃𝑑 ∈ ℝ⁺ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒))
16		oveq12 7421	. . . . . . . . . . . . . . 15 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → (𝑠 − 𝑟) = (𝑧 − 𝑦))
17	16	fveq2d 6895	. . . . . . . . . . . . . 14 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → (abs‘(𝑠 − 𝑟)) = (abs‘(𝑧 − 𝑦)))
18	17	breq1d 5158	. . . . . . . . . . . . 13 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → ((abs‘(𝑠 − 𝑟)) < 𝑑 ↔ (abs‘(𝑧 − 𝑦)) < 𝑑))
19		fveq2 6891	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 = 𝑧 → (𝐺‘𝑠) = (𝐺‘𝑧))
20		fveq2 6891	. . . . . . . . . . . . . . . 16 ⊢ (𝑟 = 𝑦 → (𝐺‘𝑟) = (𝐺‘𝑦))
21	19, 20	oveqan12d 7431	. . . . . . . . . . . . . . 15 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → ((𝐺‘𝑠) − (𝐺‘𝑟)) = ((𝐺‘𝑧) − (𝐺‘𝑦)))
22	21	fveq2d 6895	. . . . . . . . . . . . . 14 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) = (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))))
23	22	breq1d 5158	. . . . . . . . . . . . 13 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → ((abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒 ↔ (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
24	18, 23	imbi12d 344	. . . . . . . . . . . 12 ⊢ ((𝑠 = 𝑧 ∧ 𝑟 = 𝑦) → (((abs‘(𝑠 − 𝑟)) < 𝑑 → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒) ↔ ((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)))
25	24	ancoms 458	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑦 ∧ 𝑠 = 𝑧) → (((abs‘(𝑠 − 𝑟)) < 𝑑 → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒) ↔ ((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)))
26		oveq12 7421	. . . . . . . . . . . . . . 15 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → (𝑠 − 𝑟) = (𝑦 − 𝑧))
27	26	fveq2d 6895	. . . . . . . . . . . . . 14 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → (abs‘(𝑠 − 𝑟)) = (abs‘(𝑦 − 𝑧)))
28	27	breq1d 5158	. . . . . . . . . . . . 13 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → ((abs‘(𝑠 − 𝑟)) < 𝑑 ↔ (abs‘(𝑦 − 𝑧)) < 𝑑))
29		fveq2 6891	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 = 𝑦 → (𝐺‘𝑠) = (𝐺‘𝑦))
30		fveq2 6891	. . . . . . . . . . . . . . . 16 ⊢ (𝑟 = 𝑧 → (𝐺‘𝑟) = (𝐺‘𝑧))
31	29, 30	oveqan12d 7431	. . . . . . . . . . . . . . 15 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → ((𝐺‘𝑠) − (𝐺‘𝑟)) = ((𝐺‘𝑦) − (𝐺‘𝑧)))
32	31	fveq2d 6895	. . . . . . . . . . . . . 14 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) = (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))))
33	32	breq1d 5158	. . . . . . . . . . . . 13 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → ((abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒 ↔ (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))) < 𝑒))
34	28, 33	imbi12d 344	. . . . . . . . . . . 12 ⊢ ((𝑠 = 𝑦 ∧ 𝑟 = 𝑧) → (((abs‘(𝑠 − 𝑟)) < 𝑑 → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒) ↔ ((abs‘(𝑦 − 𝑧)) < 𝑑 → (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))) < 𝑒)))
35	34	ancoms 458	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑧 ∧ 𝑠 = 𝑦) → (((abs‘(𝑠 − 𝑟)) < 𝑑 → (abs‘((𝐺‘𝑠) − (𝐺‘𝑟))) < 𝑒) ↔ ((abs‘(𝑦 − 𝑧)) < 𝑑 → (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))) < 𝑒)))
36		iccssre 13413	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
37	2, 3, 36	syl2anc 583	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
38	37	ad2antrr 723	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) → (𝐴[,]𝐵) ⊆ ℝ)
39	37	ad3antrrr 727	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (𝐴[,]𝐵) ⊆ ℝ)
40		simprr 770	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑧 ∈ (𝐴[,]𝐵))
41	39, 40	sseldd 3983	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑧 ∈ ℝ)
42	41	recnd 11249	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑧 ∈ ℂ)
43		simprl 768	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑦 ∈ (𝐴[,]𝐵))
44	39, 43	sseldd 3983	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑦 ∈ ℝ)
45	44	recnd 11249	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝑦 ∈ ℂ)
46	42, 45	abssubd 15407	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (abs‘(𝑧 − 𝑦)) = (abs‘(𝑦 − 𝑧)))
47	46	breq1d 5158	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → ((abs‘(𝑧 − 𝑦)) < 𝑑 ↔ (abs‘(𝑦 − 𝑧)) < 𝑑))
48	9	ad3antrrr 727	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → 𝐺:(𝐴[,]𝐵)⟶ℂ)
49	48, 40	ffvelcdmd 7087	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (𝐺‘𝑧) ∈ ℂ)
50	48, 43	ffvelcdmd 7087	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (𝐺‘𝑦) ∈ ℂ)
51	49, 50	abssubd 15407	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) = (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))))
52	51	breq1d 5158	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → ((abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒 ↔ (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))) < 𝑒))
53	47, 52	imbi12d 344	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → (((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒) ↔ ((abs‘(𝑦 − 𝑧)) < 𝑑 → (abs‘((𝐺‘𝑦) − (𝐺‘𝑧))) < 𝑒)))
54		simpr3 1195	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝑦 ≤ 𝑧)
55	2	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐴 ∈ ℝ)
56	3	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐵 ∈ ℝ)
57	4	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐴 ≤ 𝐵)
58	5	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → (𝐴(,)𝐵) ⊆ 𝐷)
59	6	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐷 ⊆ ℝ)
60	7	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐹 ∈ 𝐿¹)
61	8	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝐹:𝐷⟶ℂ)
62		simpr1 1193	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝑦 ∈ (𝐴[,]𝐵))
63		simpr2 1194	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → 𝑧 ∈ (𝐴[,]𝐵))
64	1, 55, 56, 57, 58, 59, 60, 61, 62, 63	ftc1lem1 25890	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) ∧ 𝑦 ≤ 𝑧) → ((𝐺‘𝑧) − (𝐺‘𝑦)) = ∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡)
65	54, 64	mpdan 684	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → ((𝐺‘𝑧) − (𝐺‘𝑦)) = ∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡)
66	65	adantlr 712	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → ((𝐺‘𝑧) − (𝐺‘𝑦)) = ∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡)
67	66	ad2ant2r 744	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → ((𝐺‘𝑧) − (𝐺‘𝑦)) = ∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡)
68	67	fveq2d 6895	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) = (abs‘∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡))
69		fvexd 6906	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) ∧ 𝑡 ∈ (𝑦(,)𝑧)) → (𝐹‘𝑡) ∈ V)
70	2	ad3antrrr 727	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝐴 ∈ ℝ)
71	70	rexrd 11271	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝐴 ∈ ℝ^*)
72		simprl1 1217	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑦 ∈ (𝐴[,]𝐵))
73	3	ad3antrrr 727	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝐵 ∈ ℝ)
74		elicc2 13396	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑦 ∈ (𝐴[,]𝐵) ↔ (𝑦 ∈ ℝ ∧ 𝐴 ≤ 𝑦 ∧ 𝑦 ≤ 𝐵)))
75	70, 73, 74	syl2anc 583	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦 ∈ (𝐴[,]𝐵) ↔ (𝑦 ∈ ℝ ∧ 𝐴 ≤ 𝑦 ∧ 𝑦 ≤ 𝐵)))
76	72, 75	mpbid 231	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦 ∈ ℝ ∧ 𝐴 ≤ 𝑦 ∧ 𝑦 ≤ 𝐵))
77	76	simp2d 1142	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝐴 ≤ 𝑦)
78		iooss1 13366	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑦) → (𝑦(,)𝑧) ⊆ (𝐴(,)𝑧))
79	71, 77, 78	syl2anc 583	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦(,)𝑧) ⊆ (𝐴(,)𝑧))
80	73	rexrd 11271	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝐵 ∈ ℝ^*)
81		simprl2 1218	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑧 ∈ (𝐴[,]𝐵))
82		elicc2 13396	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑧 ∈ (𝐴[,]𝐵) ↔ (𝑧 ∈ ℝ ∧ 𝐴 ≤ 𝑧 ∧ 𝑧 ≤ 𝐵)))
83	70, 73, 82	syl2anc 583	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑧 ∈ (𝐴[,]𝐵) ↔ (𝑧 ∈ ℝ ∧ 𝐴 ≤ 𝑧 ∧ 𝑧 ≤ 𝐵)))
84	81, 83	mpbid 231	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑧 ∈ ℝ ∧ 𝐴 ≤ 𝑧 ∧ 𝑧 ≤ 𝐵))
85	84	simp3d 1143	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑧 ≤ 𝐵)
86		iooss2 13367	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑧 ≤ 𝐵) → (𝐴(,)𝑧) ⊆ (𝐴(,)𝐵))
87	80, 85, 86	syl2anc 583	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝐴(,)𝑧) ⊆ (𝐴(,)𝐵))
88	79, 87	sstrd 3992	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦(,)𝑧) ⊆ (𝐴(,)𝐵))
89	5	ad3antrrr 727	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝐴(,)𝐵) ⊆ 𝐷)
90	88, 89	sstrd 3992	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦(,)𝑧) ⊆ 𝐷)
91		ioombl 25414	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦(,)𝑧) ∈ dom vol
92	91	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦(,)𝑧) ∈ dom vol)
93		fvexd 6906	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ V)
94	8	feqmptd 6960	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)))
95	94, 7	eqeltrrd 2833	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
96	95	ad3antrrr 727	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
97	90, 92, 93, 96	iblss 25654	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑡 ∈ (𝑦(,)𝑧) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
98	69, 97	itgcl 25633	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → ∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡 ∈ ℂ)
99	98	abscld 15390	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡) ∈ ℝ)
100		iblmbf 25617	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑡 ∈ (𝑦(,)𝑧) ↦ (𝐹‘𝑡)) ∈ 𝐿¹ → (𝑡 ∈ (𝑦(,)𝑧) ↦ (𝐹‘𝑡)) ∈ MblFn)
101	97, 100	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑡 ∈ (𝑦(,)𝑧) ↦ (𝐹‘𝑡)) ∈ MblFn)
102	101, 69	mbfmptcl 25485	. . . . . . . . . . . . . . . 16 ⊢ (((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) ∧ 𝑡 ∈ (𝑦(,)𝑧)) → (𝐹‘𝑡) ∈ ℂ)
103	102	abscld 15390	. . . . . . . . . . . . . . 15 ⊢ (((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) ∧ 𝑡 ∈ (𝑦(,)𝑧)) → (abs‘(𝐹‘𝑡)) ∈ ℝ)
104	69, 97	iblabs 25678	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑡 ∈ (𝑦(,)𝑧) ↦ (abs‘(𝐹‘𝑡))) ∈ 𝐿¹)
105	103, 104	itgrecl 25647	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡 ∈ ℝ)
106		simprl 768	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑒 ∈ ℝ⁺)
107	106	ad2antrr 723	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑒 ∈ ℝ⁺)
108	107	rpred 13023	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑒 ∈ ℝ)
109	69, 97	itgabs 25684	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡) ≤ ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡)
110		mblvol 25379	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑦(,)𝑧) ∈ dom vol → (vol‘(𝑦(,)𝑧)) = (vol*‘(𝑦(,)𝑧)))
111	91, 110	ax-mp 5	. . . . . . . . . . . . . . . 16 ⊢ (vol‘(𝑦(,)𝑧)) = (vol*‘(𝑦(,)𝑧))
112		ioossre 13392	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦(,)𝑧) ⊆ ℝ
113		ovolcl 25327	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑦(,)𝑧) ⊆ ℝ → (vol‘(𝑦(,)𝑧)) ∈ ℝ^)
114	112, 113	mp1i 13	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol‘(𝑦(,)𝑧)) ∈ ℝ^)
115	84	simp1d 1141	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑧 ∈ ℝ)
116	76	simp1d 1141	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑦 ∈ ℝ)
117	115, 116	resubcld 11649	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑧 − 𝑦) ∈ ℝ)
118	117	rexrd 11271	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑧 − 𝑦) ∈ ℝ^*)
119		simprr 770	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑑 ∈ ℝ⁺)
120	119	ad2antrr 723	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑑 ∈ ℝ⁺)
121	120	rpxrd 13024	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑑 ∈ ℝ^*)
122		ioossicc 13417	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑦(,)𝑧) ⊆ (𝑦[,]𝑧)
123		iccssre 13413	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (𝑦[,]𝑧) ⊆ ℝ)
124	116, 115, 123	syl2anc 583	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑦[,]𝑧) ⊆ ℝ)
125		ovolss 25334	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝑦(,)𝑧) ⊆ (𝑦[,]𝑧) ∧ (𝑦[,]𝑧) ⊆ ℝ) → (vol‘(𝑦(,)𝑧)) ≤ (vol‘(𝑦[,]𝑧)))
126	122, 124, 125	sylancr 586	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol‘(𝑦(,)𝑧)) ≤ (vol‘(𝑦[,]𝑧)))
127		simprl3 1219	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → 𝑦 ≤ 𝑧)
128		ovolicc 25372	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ ∧ 𝑦 ≤ 𝑧) → (vol*‘(𝑦[,]𝑧)) = (𝑧 − 𝑦))
129	116, 115, 127, 128	syl3anc 1370	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol*‘(𝑦[,]𝑧)) = (𝑧 − 𝑦))
130	126, 129	breqtrd 5174	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol*‘(𝑦(,)𝑧)) ≤ (𝑧 − 𝑦))
131	116, 115, 127	abssubge0d 15385	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘(𝑧 − 𝑦)) = (𝑧 − 𝑦))
132		simprr 770	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘(𝑧 − 𝑦)) < 𝑑)
133	131, 132	eqbrtrrd 5172	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (𝑧 − 𝑦) < 𝑑)
134	114, 118, 121, 130, 133	xrlelttrd 13146	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol*‘(𝑦(,)𝑧)) < 𝑑)
135	111, 134	eqbrtrid 5183	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (vol‘(𝑦(,)𝑧)) < 𝑑)
136		sseq1 4007	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑢 = (𝑦(,)𝑧) → (𝑢 ⊆ 𝐷 ↔ (𝑦(,)𝑧) ⊆ 𝐷))
137		fveq2 6891	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑢 = (𝑦(,)𝑧) → (vol‘𝑢) = (vol‘(𝑦(,)𝑧)))
138	137	breq1d 5158	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑢 = (𝑦(,)𝑧) → ((vol‘𝑢) < 𝑑 ↔ (vol‘(𝑦(,)𝑧)) < 𝑑))
139	136, 138	anbi12d 630	. . . . . . . . . . . . . . . . 17 ⊢ (𝑢 = (𝑦(,)𝑧) → ((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) ↔ ((𝑦(,)𝑧) ⊆ 𝐷 ∧ (vol‘(𝑦(,)𝑧)) < 𝑑)))
140		2fveq3 6896	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑤 = 𝑡 → (abs‘(𝐹‘𝑤)) = (abs‘(𝐹‘𝑡)))
141	140	cbvitgv 25626	. . . . . . . . . . . . . . . . . . 19 ⊢ ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 = ∫𝑢(abs‘(𝐹‘𝑡)) d𝑡
142		itgeq1 25622	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑢 = (𝑦(,)𝑧) → ∫𝑢(abs‘(𝐹‘𝑡)) d𝑡 = ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡)
143	141, 142	eqtrid 2783	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑢 = (𝑦(,)𝑧) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 = ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡)
144	143	breq1d 5158	. . . . . . . . . . . . . . . . 17 ⊢ (𝑢 = (𝑦(,)𝑧) → (∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒 ↔ ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡 < 𝑒))
145	139, 144	imbi12d 344	. . . . . . . . . . . . . . . 16 ⊢ (𝑢 = (𝑦(,)𝑧) → (((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒) ↔ (((𝑦(,)𝑧) ⊆ 𝐷 ∧ (vol‘(𝑦(,)𝑧)) < 𝑑) → ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡 < 𝑒)))
146		simplr 766	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒))
147	145, 146, 92	rspcdva 3613	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (((𝑦(,)𝑧) ⊆ 𝐷 ∧ (vol‘(𝑦(,)𝑧)) < 𝑑) → ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡 < 𝑒))
148	90, 135, 147	mp2and 696	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → ∫(𝑦(,)𝑧)(abs‘(𝐹‘𝑡)) d𝑡 < 𝑒)
149	99, 105, 108, 109, 148	lelttrd 11379	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘∫(𝑦(,)𝑧)(𝐹‘𝑡) d𝑡) < 𝑒)
150	68, 149	eqbrtrd 5170	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ ((𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧) ∧ (abs‘(𝑧 − 𝑦)) < 𝑑)) → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)
151	150	expr 456	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵) ∧ 𝑦 ≤ 𝑧)) → ((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
152	25, 35, 38, 53, 151	wlogle 11754	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) ∧ (𝑦 ∈ (𝐴[,]𝐵) ∧ 𝑧 ∈ (𝐴[,]𝐵))) → ((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
153	152	ralrimivva 3199	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒)) → ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
154	153	ex 412	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑒 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → (∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒) → ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)))
155	154	anassrs 467	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑒 ∈ ℝ⁺) ∧ 𝑑 ∈ ℝ⁺) → (∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒) → ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)))
156	155	reximdva 3167	. . . . . 6 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → (∃𝑑 ∈ ℝ⁺ ∀𝑢 ∈ dom vol((𝑢 ⊆ 𝐷 ∧ (vol‘𝑢) < 𝑑) → ∫𝑢(abs‘(𝐹‘𝑤)) d𝑤 < 𝑒) → ∃𝑑 ∈ ℝ⁺ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒)))
157	15, 156	mpd 15	. . . . 5 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → ∃𝑑 ∈ ℝ⁺ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
158		r19.12 3310	. . . . 5 ⊢ (∃𝑑 ∈ ℝ⁺ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒) → ∀𝑦 ∈ (𝐴[,]𝐵)∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
159	157, 158	syl 17	. . . 4 ⊢ ((𝜑 ∧ 𝑒 ∈ ℝ⁺) → ∀𝑦 ∈ (𝐴[,]𝐵)∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
160	159	ralrimiva 3145	. . 3 ⊢ (𝜑 → ∀𝑒 ∈ ℝ⁺ ∀𝑦 ∈ (𝐴[,]𝐵)∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
161		ralcom 3285	. . 3 ⊢ (∀𝑒 ∈ ℝ⁺ ∀𝑦 ∈ (𝐴[,]𝐵)∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒) ↔ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑒 ∈ ℝ⁺ ∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
162	160, 161	sylib 217	. 2 ⊢ (𝜑 → ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑒 ∈ ℝ⁺ ∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))
163		ax-resscn 11173	. . . 4 ⊢ ℝ ⊆ ℂ
164	37, 163	sstrdi 3994	. . 3 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℂ)
165		ssid 4004	. . 3 ⊢ ℂ ⊆ ℂ
166		elcncf2 24730	. . 3 ⊢ (((𝐴[,]𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ) ↔ (𝐺:(𝐴[,]𝐵)⟶ℂ ∧ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑒 ∈ ℝ⁺ ∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))))
167	164, 165, 166	sylancl 585	. 2 ⊢ (𝜑 → (𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ) ↔ (𝐺:(𝐴[,]𝐵)⟶ℂ ∧ ∀𝑦 ∈ (𝐴[,]𝐵)∀𝑒 ∈ ℝ⁺ ∃𝑑 ∈ ℝ⁺ ∀𝑧 ∈ (𝐴[,]𝐵)((abs‘(𝑧 − 𝑦)) < 𝑑 → (abs‘((𝐺‘𝑧) − (𝐺‘𝑦))) < 𝑒))))
168	9, 162, 167	mpbir2and 710	1 ⊢ (𝜑 → 𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2105 ∀wral 3060 ∃wrex 3069 Vcvv 3473 ⊆ wss 3948 class class class wbr 5148 ↦ cmpt 5231 dom cdm 5676 ⟶wf 6539 ‘cfv 6543 (class class class)co 7412 ℂcc 11114 ℝcr 11115 ℝ^*cxr 11254 < clt 11255 ≤ cle 11256 − cmin 11451 ℝ⁺crp 12981 (,)cioo 13331 [,]cicc 13334 abscabs 15188 –cn→ccncf 24716 vol*covol 25311 volcvol 25312 MblFncmbf 25463 𝐿¹cibl 25466 ∫citg 25467

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-inf2 9642 ax-cc 10436 ax-cnex 11172 ax-resscn 11173 ax-1cn 11174 ax-icn 11175 ax-addcl 11176 ax-addrcl 11177 ax-mulcl 11178 ax-mulrcl 11179 ax-mulcom 11180 ax-addass 11181 ax-mulass 11182 ax-distr 11183 ax-i2m1 11184 ax-1ne0 11185 ax-1rid 11186 ax-rnegex 11187 ax-rrecex 11188 ax-cnre 11189 ax-pre-lttri 11190 ax-pre-lttrn 11191 ax-pre-ltadd 11192 ax-pre-mulgt0 11193 ax-pre-sup 11194 ax-addf 11195

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-symdif 4242 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7674 df-ofr 7675 df-om 7860 df-1st 7979 df-2nd 7980 df-supp 8152 df-frecs 8272 df-wrecs 8303 df-recs 8377 df-rdg 8416 df-1o 8472 df-2o 8473 df-oadd 8476 df-omul 8477 df-er 8709 df-map 8828 df-pm 8829 df-ixp 8898 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9368 df-fi 9412 df-sup 9443 df-inf 9444 df-oi 9511 df-dju 9902 df-card 9940 df-acn 9943 df-pnf 11257 df-mnf 11258 df-xr 11259 df-ltxr 11260 df-le 11261 df-sub 11453 df-neg 11454 df-div 11879 df-nn 12220 df-2 12282 df-3 12283 df-4 12284 df-5 12285 df-6 12286 df-7 12287 df-8 12288 df-9 12289 df-n0 12480 df-z 12566 df-dec 12685 df-uz 12830 df-q 12940 df-rp 12982 df-xneg 13099 df-xadd 13100 df-xmul 13101 df-ioo 13335 df-ioc 13336 df-ico 13337 df-icc 13338 df-fz 13492 df-fzo 13635 df-fl 13764 df-mod 13842 df-seq 13974 df-exp 14035 df-hash 14298 df-cj 15053 df-re 15054 df-im 15055 df-sqrt 15189 df-abs 15190 df-clim 15439 df-rlim 15440 df-sum 15640 df-struct 17087 df-sets 17104 df-slot 17122 df-ndx 17134 df-base 17152 df-ress 17181 df-plusg 17217 df-mulr 17218 df-starv 17219 df-sca 17220 df-vsca 17221 df-ip 17222 df-tset 17223 df-ple 17224 df-ds 17226 df-unif 17227 df-hom 17228 df-cco 17229 df-rest 17375 df-topn 17376 df-0g 17394 df-gsum 17395 df-topgen 17396 df-pt 17397 df-prds 17400 df-xrs 17455 df-qtop 17460 df-imas 17461 df-xps 17463 df-mre 17537 df-mrc 17538 df-acs 17540 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-submnd 18712 df-mulg 18994 df-cntz 19229 df-cmn 19698 df-psmet 21225 df-xmet 21226 df-met 21227 df-bl 21228 df-mopn 21229 df-cnfld 21234 df-top 22716 df-topon 22733 df-topsp 22755 df-bases 22769 df-cn 23051 df-cnp 23052 df-cmp 23211 df-tx 23386 df-hmeo 23579 df-xms 24146 df-ms 24147 df-tms 24148 df-cncf 24718 df-ovol 25313 df-vol 25314 df-mbf 25468 df-itg1 25469 df-itg2 25470 df-ibl 25471 df-itg 25472 df-0p 25519

This theorem is referenced by: ftc2 25899

W3C validator