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Theorem ftc1lem4 25994

Description: Lemma for ftc1 25997. (Contributed by Mario Carneiro, 31-Aug-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)
ftc1.c	⊢ (𝜑 → 𝐶 ∈ (𝐴(,)𝐵))
ftc1.f	⊢ (𝜑 → 𝐹 ∈ ((𝐾 CnP 𝐿)‘𝐶))
ftc1.j	⊢ 𝐽 = (𝐿 ↾_t ℝ)
ftc1.k	⊢ 𝐾 = (𝐿 ↾_t 𝐷)
ftc1.l	⊢ 𝐿 = (TopOpen‘ℂ_fld)
ftc1.h	⊢ 𝐻 = (𝑧 ∈ ((𝐴[,]𝐵) ∖ {𝐶}) ↦ (((𝐺‘𝑧) − (𝐺‘𝐶)) / (𝑧 − 𝐶)))
ftc1.e	⊢ (𝜑 → 𝐸 ∈ ℝ⁺)
ftc1.r	⊢ (𝜑 → 𝑅 ∈ ℝ⁺)
ftc1.fc	⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
ftc1.x1	⊢ (𝜑 → 𝑋 ∈ (𝐴[,]𝐵))
ftc1.x2	⊢ (𝜑 → (abs‘(𝑋 − 𝐶)) < 𝑅)
ftc1.y1	⊢ (𝜑 → 𝑌 ∈ (𝐴[,]𝐵))
ftc1.y2	⊢ (𝜑 → (abs‘(𝑌 − 𝐶)) < 𝑅)

**Assertion**
Ref	Expression
ftc1lem4	⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶))) < 𝐸)

Distinct variable groups: 𝑥,𝑡,𝑦,𝑧,𝐶 𝑡,𝐷,𝑥,𝑦,𝑧 𝑦,𝐺,𝑧 𝑡,𝐴,𝑥,𝑦,𝑧 𝑡,𝐵,𝑥,𝑦,𝑧 𝑡,𝑋,𝑥,𝑧 𝑡,𝐸,𝑦 𝑦,𝐻 𝜑,𝑡,𝑥,𝑦,𝑧 𝑡,𝑌,𝑥 𝑡,𝐹,𝑥,𝑦,𝑧 𝑥,𝐿,𝑦,𝑧 𝑦,𝑅 Allowed substitution hints: 𝑅(𝑥,𝑧,𝑡) 𝐸(𝑥,𝑧) 𝐺(𝑥,𝑡) 𝐻(𝑥,𝑧,𝑡) 𝐽(𝑥,𝑦,𝑧,𝑡) 𝐾(𝑥,𝑦,𝑧,𝑡) 𝐿(𝑡) 𝑋(𝑦) 𝑌(𝑦,𝑧)

**Proof of Theorem ftc1lem4**
Step	Hyp	Ref	Expression
1		ovexd 7461	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((𝐹‘𝑡) − (𝐹‘𝐶)) ∈ V)
2		ftc1.a	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3	2	rexrd 11302	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
4		ftc1.x1	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑋 ∈ (𝐴[,]𝐵))
5		ftc1.b	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐵 ∈ ℝ)
6		elicc2 13429	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
7	2, 5, 6	syl2anc 582	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
8	4, 7	mpbid 231	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵))
9	8	simp2d 1140	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ≤ 𝑋)
10		iooss1 13399	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑋) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
11	3, 9, 10	syl2anc 582	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
12	5	rexrd 11302	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
13		ftc1.y1	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑌 ∈ (𝐴[,]𝐵))
14		elicc2 13429	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
15	2, 5, 14	syl2anc 582	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
16	13, 15	mpbid 231	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵))
17	16	simp3d 1141	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑌 ≤ 𝐵)
18		iooss2 13400	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑌 ≤ 𝐵) → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
19	12, 17, 18	syl2anc 582	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
20	11, 19	sstrd 3992	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝐵))
21		ftc1.s	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
22	20, 21	sstrd 3992	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ 𝐷)
23	22	sselda 3982	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 ∈ 𝐷)
24		ftc1.g	. . . . . . . . . . . 12 ⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
25		ftc1.le	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
26		ftc1.d	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐷 ⊆ ℝ)
27		ftc1.i	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹 ∈ 𝐿¹)
28		ftc1.c	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐶 ∈ (𝐴(,)𝐵))
29		ftc1.f	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹 ∈ ((𝐾 CnP 𝐿)‘𝐶))
30		ftc1.j	. . . . . . . . . . . 12 ⊢ 𝐽 = (𝐿 ↾_t ℝ)
31		ftc1.k	. . . . . . . . . . . 12 ⊢ 𝐾 = (𝐿 ↾_t 𝐷)
32		ftc1.l	. . . . . . . . . . . 12 ⊢ 𝐿 = (TopOpen‘ℂ_fld)
33	24, 2, 5, 25, 21, 26, 27, 28, 29, 30, 31, 32	ftc1lem3 25993	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
34	33	ffvelcdmda 7099	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ ℂ)
35	23, 34	syldan 589	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐹‘𝑡) ∈ ℂ)
36		ioombl 25514	. . . . . . . . . . 11 ⊢ (𝑋(,)𝑌) ∈ dom vol
37	36	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋(,)𝑌) ∈ dom vol)
38		fvexd 6917	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ V)
39	33	feqmptd 6972	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)))
40	39, 27	eqeltrrd 2830	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
41	22, 37, 38, 40	iblss 25754	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
42	21, 28	sseldd 3983	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ 𝐷)
43	33, 42	ffvelcdmd 7100	. . . . . . . . . 10 ⊢ (𝜑 → (𝐹‘𝐶) ∈ ℂ)
44	43	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐹‘𝐶) ∈ ℂ)
45		fconstmpt 5744	. . . . . . . . . 10 ⊢ ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) = (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝐶))
46		mblvol 25479	. . . . . . . . . . . . 13 ⊢ ((𝑋(,)𝑌) ∈ dom vol → (vol‘(𝑋(,)𝑌)) = (vol*‘(𝑋(,)𝑌)))
47	36, 46	ax-mp 5	. . . . . . . . . . . 12 ⊢ (vol‘(𝑋(,)𝑌)) = (vol*‘(𝑋(,)𝑌))
48		ioossicc 13450	. . . . . . . . . . . . . 14 ⊢ (𝑋(,)𝑌) ⊆ (𝑋[,]𝑌)
49	48	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝑋[,]𝑌))
50		iccssre 13446	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
51	2, 5, 50	syl2anc 582	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
52	51, 4	sseldd 3983	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑋 ∈ ℝ)
53	51, 13	sseldd 3983	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑌 ∈ ℝ)
54		iccmbl 25515	. . . . . . . . . . . . . . 15 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋[,]𝑌) ∈ dom vol)
55	52, 53, 54	syl2anc 582	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑋[,]𝑌) ∈ dom vol)
56		mblss 25480	. . . . . . . . . . . . . 14 ⊢ ((𝑋[,]𝑌) ∈ dom vol → (𝑋[,]𝑌) ⊆ ℝ)
57	55, 56	syl 17	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋[,]𝑌) ⊆ ℝ)
58		mblvol 25479	. . . . . . . . . . . . . . 15 ⊢ ((𝑋[,]𝑌) ∈ dom vol → (vol‘(𝑋[,]𝑌)) = (vol*‘(𝑋[,]𝑌)))
59	55, 58	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (vol‘(𝑋[,]𝑌)) = (vol*‘(𝑋[,]𝑌)))
60		iccvolcl 25516	. . . . . . . . . . . . . . 15 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (vol‘(𝑋[,]𝑌)) ∈ ℝ)
61	52, 53, 60	syl2anc 582	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (vol‘(𝑋[,]𝑌)) ∈ ℝ)
62	59, 61	eqeltrrd 2830	. . . . . . . . . . . . 13 ⊢ (𝜑 → (vol*‘(𝑋[,]𝑌)) ∈ ℝ)
63		ovolsscl 25435	. . . . . . . . . . . . 13 ⊢ (((𝑋(,)𝑌) ⊆ (𝑋[,]𝑌) ∧ (𝑋[,]𝑌) ⊆ ℝ ∧ (vol‘(𝑋[,]𝑌)) ∈ ℝ) → (vol‘(𝑋(,)𝑌)) ∈ ℝ)
64	49, 57, 62, 63	syl3anc 1368	. . . . . . . . . . . 12 ⊢ (𝜑 → (vol*‘(𝑋(,)𝑌)) ∈ ℝ)
65	47, 64	eqeltrid 2833	. . . . . . . . . . 11 ⊢ (𝜑 → (vol‘(𝑋(,)𝑌)) ∈ ℝ)
66		iblconst 25767	. . . . . . . . . . 11 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ (𝐹‘𝐶) ∈ ℂ) → ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) ∈ 𝐿¹)
67	37, 65, 43, 66	syl3anc 1368	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) ∈ 𝐿¹)
68	45, 67	eqeltrrid 2834	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝐶)) ∈ 𝐿¹)
69	35, 41, 44, 68	iblsub 25771	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ ((𝐹‘𝑡) − (𝐹‘𝐶))) ∈ 𝐿¹)
70	1, 69	itgcl 25733	. . . . . . 7 ⊢ (𝜑 → ∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 ∈ ℂ)
71	70	adantr 479	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 ∈ ℂ)
72	53, 52	resubcld 11680	. . . . . . . 8 ⊢ (𝜑 → (𝑌 − 𝑋) ∈ ℝ)
73	72	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ∈ ℝ)
74	73	recnd 11280	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ∈ ℂ)
75	52, 53	posdifd 11839	. . . . . . . 8 ⊢ (𝜑 → (𝑋 < 𝑌 ↔ 0 < (𝑌 − 𝑋)))
76	75	biimpa 475	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (𝑌 − 𝑋))
77	76	gt0ne0d 11816	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ≠ 0)
78	71, 74, 77	divcld 12028	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) ∈ ℂ)
79	43	adantr 479	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐹‘𝐶) ∈ ℂ)
80		ltle 11340	. . . . . . . . . . 11 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))
81	52, 53, 80	syl2anc 582	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))
82	81	imp 405	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑋 ≤ 𝑌)
83	24, 2, 5, 25, 21, 26, 27, 33, 4, 13	ftc1lem1 25990	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
84	82, 83	syldan 589	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
85	35, 44	npcand 11613	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (((𝐹‘𝑡) − (𝐹‘𝐶)) + (𝐹‘𝐶)) = (𝐹‘𝑡))
86	85	itgeq2dv 25731	. . . . . . . . . 10 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(((𝐹‘𝑡) − (𝐹‘𝐶)) + (𝐹‘𝐶)) d𝑡 = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
87	35, 44	subcld 11609	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((𝐹‘𝑡) − (𝐹‘𝐶)) ∈ ℂ)
88	87, 69, 44, 68	itgadd 25774	. . . . . . . . . 10 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(((𝐹‘𝑡) − (𝐹‘𝐶)) + (𝐹‘𝐶)) d𝑡 = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡))
89	86, 88	eqtr3d 2770	. . . . . . . . 9 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡 = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡))
90	89	adantr 479	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡 = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡))
91		itgconst 25768	. . . . . . . . . . . 12 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ (𝐹‘𝐶) ∈ ℂ) → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))))
92	37, 65, 43, 91	syl3anc 1368	. . . . . . . . . . 11 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))))
93	92	adantr 479	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))))
94	52	adantr 479	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑋 ∈ ℝ)
95	53	adantr 479	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑌 ∈ ℝ)
96		ovolioo 25517	. . . . . . . . . . . . 13 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ ∧ 𝑋 ≤ 𝑌) → (vol*‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
97	94, 95, 82, 96	syl3anc 1368	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (vol*‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
98	47, 97	eqtrid 2780	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (vol‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
99	98	oveq2d 7442	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))) = ((𝐹‘𝐶) · (𝑌 − 𝑋)))
100	93, 99	eqtrd 2768	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (𝑌 − 𝑋)))
101	100	oveq2d 7442	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡) = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ((𝐹‘𝐶) · (𝑌 − 𝑋))))
102	84, 90, 101	3eqtrd 2772	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ((𝐹‘𝐶) · (𝑌 − 𝑋))))
103	102	oveq1d 7441	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) = ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ((𝐹‘𝐶) · (𝑌 − 𝑋))) / (𝑌 − 𝑋)))
104	79, 74	mulcld 11272	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐹‘𝐶) · (𝑌 − 𝑋)) ∈ ℂ)
105	71, 104, 74, 77	divdird 12066	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ((𝐹‘𝐶) · (𝑌 − 𝑋))) / (𝑌 − 𝑋)) = ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) + (((𝐹‘𝐶) · (𝑌 − 𝑋)) / (𝑌 − 𝑋))))
106	79, 74, 77	divcan4d 12034	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (((𝐹‘𝐶) · (𝑌 − 𝑋)) / (𝑌 − 𝑋)) = (𝐹‘𝐶))
107	106	oveq2d 7442	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) + (((𝐹‘𝐶) · (𝑌 − 𝑋)) / (𝑌 − 𝑋))) = ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) + (𝐹‘𝐶)))
108	103, 105, 107	3eqtrd 2772	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) = ((∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) + (𝐹‘𝐶)))
109	78, 79, 108	mvrraddd 11664	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶)) = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)))
110	109	fveq2d 6906	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶))) = (abs‘(∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋))))
111	71, 74, 77	absdivd 15442	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘(∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋))) = ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (abs‘(𝑌 − 𝑋))))
112		0re 11254	. . . . . . 7 ⊢ 0 ∈ ℝ
113		ltle 11340	. . . . . . 7 ⊢ ((0 ∈ ℝ ∧ (𝑌 − 𝑋) ∈ ℝ) → (0 < (𝑌 − 𝑋) → 0 ≤ (𝑌 − 𝑋)))
114	112, 73, 113	sylancr 585	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (0 < (𝑌 − 𝑋) → 0 ≤ (𝑌 − 𝑋)))
115	76, 114	mpd 15	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 ≤ (𝑌 − 𝑋))
116	73, 115	absidd 15409	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘(𝑌 − 𝑋)) = (𝑌 − 𝑋))
117	116	oveq2d 7442	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (abs‘(𝑌 − 𝑋))) = ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)))
118	110, 111, 117	3eqtrd 2772	. 2 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶))) = ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)))
119	70	abscld 15423	. . . . 5 ⊢ (𝜑 → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
120	119	adantr 479	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
121	87	abscld 15423	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) ∈ ℝ)
122	1, 69	iblabs 25778	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ 𝐿¹)
123	121, 122	itgrecl 25747	. . . . 5 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 ∈ ℝ)
124	123	adantr 479	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 ∈ ℝ)
125		ftc1.e	. . . . . . 7 ⊢ (𝜑 → 𝐸 ∈ ℝ⁺)
126	125	rpred 13056	. . . . . 6 ⊢ (𝜑 → 𝐸 ∈ ℝ)
127	72, 126	remulcld 11282	. . . . 5 ⊢ (𝜑 → ((𝑌 − 𝑋) · 𝐸) ∈ ℝ)
128	127	adantr 479	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝑌 − 𝑋) · 𝐸) ∈ ℝ)
129	87, 69	itgabs 25784	. . . . 5 ⊢ (𝜑 → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ≤ ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)
130	129	adantr 479	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ≤ ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)
131	76, 98	breqtrrd 5180	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (vol‘(𝑋(,)𝑌)))
132	126	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝐸 ∈ ℝ)
133		fconstmpt 5744	. . . . . . . . . 10 ⊢ ((𝑋(,)𝑌) × {𝐸}) = (𝑡 ∈ (𝑋(,)𝑌) ↦ 𝐸)
134	126	recnd 11280	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐸 ∈ ℂ)
135		iblconst 25767	. . . . . . . . . . 11 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ 𝐸 ∈ ℂ) → ((𝑋(,)𝑌) × {𝐸}) ∈ 𝐿¹)
136	37, 65, 134, 135	syl3anc 1368	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑋(,)𝑌) × {𝐸}) ∈ 𝐿¹)
137	133, 136	eqeltrrid 2834	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ 𝐸) ∈ 𝐿¹)
138	132, 137, 121, 122	iblsub 25771	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))))) ∈ 𝐿¹)
139	138	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))))) ∈ 𝐿¹)
140	26, 42	sseldd 3983	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐶 ∈ ℝ)
141		ftc1.r	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑅 ∈ ℝ⁺)
142	141	rpred 13056	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑅 ∈ ℝ)
143	140, 142	resubcld 11680	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 − 𝑅) ∈ ℝ)
144	143	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) ∈ ℝ)
145	52	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑋 ∈ ℝ)
146	22, 26	sstrd 3992	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ ℝ)
147	146	sselda 3982	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 ∈ ℝ)
148		ftc1.x2	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (abs‘(𝑋 − 𝐶)) < 𝑅)
149	52, 140, 142	absdifltd 15420	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs‘(𝑋 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑋 ∧ 𝑋 < (𝐶 + 𝑅))))
150	148, 149	mpbid 231	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝐶 − 𝑅) < 𝑋 ∧ 𝑋 < (𝐶 + 𝑅)))
151	150	simpld 493	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 − 𝑅) < 𝑋)
152	151	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) < 𝑋)
153		eliooord 13423	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ (𝑋(,)𝑌) → (𝑋 < 𝑡 ∧ 𝑡 < 𝑌))
154	153	adantl 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝑋 < 𝑡 ∧ 𝑡 < 𝑌))
155	154	simpld 493	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑋 < 𝑡)
156	144, 145, 147, 152, 155	lttrd 11413	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) < 𝑡)
157	53	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑌 ∈ ℝ)
158	140, 142	readdcld 11281	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 + 𝑅) ∈ ℝ)
159	158	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 + 𝑅) ∈ ℝ)
160	154	simprd 494	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 < 𝑌)
161		ftc1.y2	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (abs‘(𝑌 − 𝐶)) < 𝑅)
162	53, 140, 142	absdifltd 15420	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs‘(𝑌 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑌 ∧ 𝑌 < (𝐶 + 𝑅))))
163	161, 162	mpbid 231	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝐶 − 𝑅) < 𝑌 ∧ 𝑌 < (𝐶 + 𝑅)))
164	163	simprd 494	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑌 < (𝐶 + 𝑅))
165	164	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑌 < (𝐶 + 𝑅))
166	147, 157, 159, 160, 165	lttrd 11413	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 < (𝐶 + 𝑅))
167	140	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝐶 ∈ ℝ)
168	142	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑅 ∈ ℝ)
169	147, 167, 168	absdifltd 15420	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((abs‘(𝑡 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑡 ∧ 𝑡 < (𝐶 + 𝑅))))
170	156, 166, 169	mpbir2and 711	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (abs‘(𝑡 − 𝐶)) < 𝑅)
171		fvoveq1 7449	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑡 → (abs‘(𝑦 − 𝐶)) = (abs‘(𝑡 − 𝐶)))
172	171	breq1d 5162	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑡 → ((abs‘(𝑦 − 𝐶)) < 𝑅 ↔ (abs‘(𝑡 − 𝐶)) < 𝑅))
173	172	imbrov2fvoveq 7451	. . . . . . . . . . 11 ⊢ (𝑦 = 𝑡 → (((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸) ↔ ((abs‘(𝑡 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸)))
174		ftc1.fc	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
175	174	ralrimiva 3143	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑦 ∈ 𝐷 ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
176	175	adantr 479	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ∀𝑦 ∈ 𝐷 ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
177	173, 176, 23	rspcdva 3612	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((abs‘(𝑡 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸))
178	170, 177	mpd 15	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸)
179		difrp 13052	. . . . . . . . . 10 ⊢ (((abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) ∈ ℝ ∧ 𝐸 ∈ ℝ) → ((abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸 ↔ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺))
180	121, 132, 179	syl2anc 582	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸 ↔ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺))
181	178, 180	mpbid 231	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺)
182	181	adantlr 713	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 < 𝑌) ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺)
183	131, 139, 182	itggt0 25793	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < ∫(𝑋(,)𝑌)(𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) d𝑡)
184	132, 137, 121, 122	itgsub 25775	. . . . . . . 8 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) d𝑡 = (∫(𝑋(,)𝑌)𝐸 d𝑡 − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
185	184	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) d𝑡 = (∫(𝑋(,)𝑌)𝐸 d𝑡 − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
186		itgconst 25768	. . . . . . . . . . 11 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ 𝐸 ∈ ℂ) → ∫(𝑋(,)𝑌)𝐸 d𝑡 = (𝐸 · (vol‘(𝑋(,)𝑌))))
187	37, 65, 134, 186	syl3anc 1368	. . . . . . . . . 10 ⊢ (𝜑 → ∫(𝑋(,)𝑌)𝐸 d𝑡 = (𝐸 · (vol‘(𝑋(,)𝑌))))
188	187	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)𝐸 d𝑡 = (𝐸 · (vol‘(𝑋(,)𝑌))))
189	98	oveq2d 7442	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐸 · (vol‘(𝑋(,)𝑌))) = (𝐸 · (𝑌 − 𝑋)))
190	72	recnd 11280	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑌 − 𝑋) ∈ ℂ)
191	134, 190	mulcomd 11273	. . . . . . . . . 10 ⊢ (𝜑 → (𝐸 · (𝑌 − 𝑋)) = ((𝑌 − 𝑋) · 𝐸))
192	191	adantr 479	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐸 · (𝑌 − 𝑋)) = ((𝑌 − 𝑋) · 𝐸))
193	188, 189, 192	3eqtrd 2772	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)𝐸 d𝑡 = ((𝑌 − 𝑋) · 𝐸))
194	193	oveq1d 7441	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (∫(𝑋(,)𝑌)𝐸 d𝑡 − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡) = (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
195	185, 194	eqtrd 2768	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) d𝑡 = (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
196	183, 195	breqtrd 5178	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
197	123, 127	posdifd 11839	. . . . . 6 ⊢ (𝜑 → (∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 < ((𝑌 − 𝑋) · 𝐸) ↔ 0 < (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)))
198	197	biimpar 476	. . . . 5 ⊢ ((𝜑 ∧ 0 < (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)) → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 < ((𝑌 − 𝑋) · 𝐸))
199	196, 198	syldan 589	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 < ((𝑌 − 𝑋) · 𝐸))
200	120, 124, 128, 130, 199	lelttrd 11410	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) < ((𝑌 − 𝑋) · 𝐸))
201	71	abscld 15423	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
202	126	adantr 479	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝐸 ∈ ℝ)
203		ltdivmul 12127	. . . 4 ⊢ (((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ ∧ 𝐸 ∈ ℝ ∧ ((𝑌 − 𝑋) ∈ ℝ ∧ 0 < (𝑌 − 𝑋))) → (((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)) < 𝐸 ↔ (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) < ((𝑌 − 𝑋) · 𝐸)))
204	201, 202, 73, 76, 203	syl112anc 1371	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)) < 𝐸 ↔ (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) < ((𝑌 − 𝑋) · 𝐸)))
205	200, 204	mpbird 256	. 2 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)) < 𝐸)
206	118, 205	eqbrtrd 5174	1 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶))) < 𝐸)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ∀wral 3058 Vcvv 3473 ∖ cdif 3946 ⊆ wss 3949 {csn 4632 class class class wbr 5152 ↦ cmpt 5235 × cxp 5680 dom cdm 5682 ‘cfv 6553 (class class class)co 7426 ℂcc 11144 ℝcr 11145 0cc0 11146 + caddc 11149 · cmul 11151 ℝ^*cxr 11285 < clt 11286 ≤ cle 11287 − cmin 11482 / cdiv 11909 ℝ⁺crp 13014 (,)cioo 13364 [,]cicc 13367 abscabs 15221 ↾_t crest 17409 TopOpenctopn 17410 ℂ_fldccnfld 21286 CnP ccnp 23149 vol*covol 25411 volcvol 25412 𝐿¹cibl 25566 ∫citg 25567

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2699 ax-rep 5289 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-inf2 9672 ax-cc 10466 ax-cnex 11202 ax-resscn 11203 ax-1cn 11204 ax-icn 11205 ax-addcl 11206 ax-addrcl 11207 ax-mulcl 11208 ax-mulrcl 11209 ax-mulcom 11210 ax-addass 11211 ax-mulass 11212 ax-distr 11213 ax-i2m1 11214 ax-1ne0 11215 ax-1rid 11216 ax-rnegex 11217 ax-rrecex 11218 ax-cnre 11219 ax-pre-lttri 11220 ax-pre-lttrn 11221 ax-pre-ltadd 11222 ax-pre-mulgt0 11223 ax-pre-sup 11224 ax-addf 11225

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-symdif 4245 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-tp 4637 df-op 4639 df-uni 4913 df-int 4954 df-iun 5002 df-iin 5003 df-disj 5118 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-se 5638 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6310 df-ord 6377 df-on 6378 df-lim 6379 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-isom 6562 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-of 7691 df-ofr 7692 df-om 7877 df-1st 7999 df-2nd 8000 df-supp 8172 df-frecs 8293 df-wrecs 8324 df-recs 8398 df-rdg 8437 df-1o 8493 df-2o 8494 df-oadd 8497 df-omul 8498 df-er 8731 df-map 8853 df-pm 8854 df-ixp 8923 df-en 8971 df-dom 8972 df-sdom 8973 df-fin 8974 df-fsupp 9394 df-fi 9442 df-sup 9473 df-inf 9474 df-oi 9541 df-dju 9932 df-card 9970 df-acn 9973 df-pnf 11288 df-mnf 11289 df-xr 11290 df-ltxr 11291 df-le 11292 df-sub 11484 df-neg 11485 df-div 11910 df-nn 12251 df-2 12313 df-3 12314 df-4 12315 df-5 12316 df-6 12317 df-7 12318 df-8 12319 df-9 12320 df-n0 12511 df-z 12597 df-dec 12716 df-uz 12861 df-q 12971 df-rp 13015 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-ioo 13368 df-ioc 13369 df-ico 13370 df-icc 13371 df-fz 13525 df-fzo 13668 df-fl 13797 df-mod 13875 df-seq 14007 df-exp 14067 df-hash 14330 df-cj 15086 df-re 15087 df-im 15088 df-sqrt 15222 df-abs 15223 df-clim 15472 df-rlim 15473 df-sum 15673 df-struct 17123 df-sets 17140 df-slot 17158 df-ndx 17170 df-base 17188 df-ress 17217 df-plusg 17253 df-mulr 17254 df-starv 17255 df-sca 17256 df-vsca 17257 df-ip 17258 df-tset 17259 df-ple 17260 df-ds 17262 df-unif 17263 df-hom 17264 df-cco 17265 df-rest 17411 df-topn 17412 df-0g 17430 df-gsum 17431 df-topgen 17432 df-pt 17433 df-prds 17436 df-xrs 17491 df-qtop 17496 df-imas 17497 df-xps 17499 df-mre 17573 df-mrc 17574 df-acs 17576 df-mgm 18607 df-sgrp 18686 df-mnd 18702 df-submnd 18748 df-mulg 19031 df-cntz 19275 df-cmn 19744 df-psmet 21278 df-xmet 21279 df-met 21280 df-bl 21281 df-mopn 21282 df-cnfld 21287 df-top 22816 df-topon 22833 df-topsp 22855 df-bases 22869 df-cn 23151 df-cnp 23152 df-cmp 23311 df-tx 23486 df-hmeo 23679 df-xms 24246 df-ms 24247 df-tms 24248 df-cncf 24818 df-ovol 25413 df-vol 25414 df-mbf 25568 df-itg1 25569 df-itg2 25570 df-ibl 25571 df-itg 25572 df-0p 25619

This theorem is referenced by: ftc1lem5 25995

W3C validator