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Theorem ftc1lem4 24208

Description: Lemma for ftc1 24211. (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 6944	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((𝐹‘𝑡) − (𝐹‘𝐶)) ∈ V)
2		ftc1.a	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3	2	rexrd 10413	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
4		ftc1.x1	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑋 ∈ (𝐴[,]𝐵))
5		ftc1.b	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐵 ∈ ℝ)
6		elicc2 12533	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
7	2, 5, 6	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
8	4, 7	mpbid 224	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵))
9	8	simp2d 1177	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ≤ 𝑋)
10		iooss1 12505	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑋) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
11	3, 9, 10	syl2anc 579	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
12	5	rexrd 10413	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
13		ftc1.y1	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑌 ∈ (𝐴[,]𝐵))
14		elicc2 12533	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
15	2, 5, 14	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
16	13, 15	mpbid 224	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵))
17	16	simp3d 1178	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑌 ≤ 𝐵)
18		iooss2 12506	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑌 ≤ 𝐵) → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
19	12, 17, 18	syl2anc 579	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
20	11, 19	sstrd 3837	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝐵))
21		ftc1.s	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
22	20, 21	sstrd 3837	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ 𝐷)
23	22	sselda 3827	. . . . . . . . . 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 24207	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
34	33	ffvelrnda 6613	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ ℂ)
35	23, 34	syldan 585	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐹‘𝑡) ∈ ℂ)
36		ioombl 23738	. . . . . . . . . . 11 ⊢ (𝑋(,)𝑌) ∈ dom vol
37	36	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋(,)𝑌) ∈ dom vol)
38		fvexd 6452	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ V)
39	33	feqmptd 6500	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)))
40	39, 27	eqeltrrd 2907	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
41	22, 37, 38, 40	iblss 23977	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
42	21, 28	sseldd 3828	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ 𝐷)
43	33, 42	ffvelrnd 6614	. . . . . . . . . 10 ⊢ (𝜑 → (𝐹‘𝐶) ∈ ℂ)
44	43	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐹‘𝐶) ∈ ℂ)
45		fconstmpt 5402	. . . . . . . . . 10 ⊢ ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) = (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝐶))
46		mblvol 23703	. . . . . . . . . . . . 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 12554	. . . . . . . . . . . . . 14 ⊢ (𝑋(,)𝑌) ⊆ (𝑋[,]𝑌)
49	48	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝑋[,]𝑌))
50		iccssre 12550	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
51	2, 5, 50	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
52	51, 4	sseldd 3828	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑋 ∈ ℝ)
53	51, 13	sseldd 3828	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑌 ∈ ℝ)
54		iccmbl 23739	. . . . . . . . . . . . . . 15 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋[,]𝑌) ∈ dom vol)
55	52, 53, 54	syl2anc 579	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑋[,]𝑌) ∈ dom vol)
56		mblss 23704	. . . . . . . . . . . . . 14 ⊢ ((𝑋[,]𝑌) ∈ dom vol → (𝑋[,]𝑌) ⊆ ℝ)
57	55, 56	syl 17	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋[,]𝑌) ⊆ ℝ)
58		mblvol 23703	. . . . . . . . . . . . . . 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 23740	. . . . . . . . . . . . . . 15 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (vol‘(𝑋[,]𝑌)) ∈ ℝ)
61	52, 53, 60	syl2anc 579	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (vol‘(𝑋[,]𝑌)) ∈ ℝ)
62	59, 61	eqeltrrd 2907	. . . . . . . . . . . . 13 ⊢ (𝜑 → (vol*‘(𝑋[,]𝑌)) ∈ ℝ)
63		ovolsscl 23659	. . . . . . . . . . . . 13 ⊢ (((𝑋(,)𝑌) ⊆ (𝑋[,]𝑌) ∧ (𝑋[,]𝑌) ⊆ ℝ ∧ (vol‘(𝑋[,]𝑌)) ∈ ℝ) → (vol‘(𝑋(,)𝑌)) ∈ ℝ)
64	49, 57, 62, 63	syl3anc 1494	. . . . . . . . . . . 12 ⊢ (𝜑 → (vol*‘(𝑋(,)𝑌)) ∈ ℝ)
65	47, 64	syl5eqel 2910	. . . . . . . . . . 11 ⊢ (𝜑 → (vol‘(𝑋(,)𝑌)) ∈ ℝ)
66		iblconst 23990	. . . . . . . . . . 11 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ (𝐹‘𝐶) ∈ ℂ) → ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) ∈ 𝐿¹)
67	37, 65, 43, 66	syl3anc 1494	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑋(,)𝑌) × {(𝐹‘𝐶)}) ∈ 𝐿¹)
68	45, 67	syl5eqelr 2911	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝐶)) ∈ 𝐿¹)
69	35, 41, 44, 68	iblsub 23994	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ ((𝐹‘𝑡) − (𝐹‘𝐶))) ∈ 𝐿¹)
70	1, 69	itgcl 23956	. . . . . . 7 ⊢ (𝜑 → ∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 ∈ ℂ)
71	70	adantr 474	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 ∈ ℂ)
72	53, 52	resubcld 10789	. . . . . . . 8 ⊢ (𝜑 → (𝑌 − 𝑋) ∈ ℝ)
73	72	adantr 474	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ∈ ℝ)
74	73	recnd 10392	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ∈ ℂ)
75	52, 53	posdifd 10946	. . . . . . . 8 ⊢ (𝜑 → (𝑋 < 𝑌 ↔ 0 < (𝑌 − 𝑋)))
76	75	biimpa 470	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (𝑌 − 𝑋))
77	76	gt0ne0d 10923	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑌 − 𝑋) ≠ 0)
78	71, 74, 77	divcld 11134	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)) ∈ ℂ)
79	43	adantr 474	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐹‘𝐶) ∈ ℂ)
80		ltle 10452	. . . . . . . . . . 11 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))
81	52, 53, 80	syl2anc 579	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋 < 𝑌 → 𝑋 ≤ 𝑌))
82	81	imp 397	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑋 ≤ 𝑌)
83	24, 2, 5, 25, 21, 26, 27, 33, 4, 13	ftc1lem1 24204	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
84	82, 83	syldan 585	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
85	35, 44	npcand 10724	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (((𝐹‘𝑡) − (𝐹‘𝐶)) + (𝐹‘𝐶)) = (𝐹‘𝑡))
86	85	itgeq2dv 23954	. . . . . . . . . 10 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(((𝐹‘𝑡) − (𝐹‘𝐶)) + (𝐹‘𝐶)) d𝑡 = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
87	35, 44	subcld 10720	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((𝐹‘𝑡) − (𝐹‘𝐶)) ∈ ℂ)
88	87, 69, 44, 68	itgadd 23997	. . . . . . . . . 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 2863	. . . . . . . . 9 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡 = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡))
90	89	adantr 474	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡 = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡))
91		itgconst 23991	. . . . . . . . . . . 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 1494	. . . . . . . . . . 11 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))))
93	92	adantr 474	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))))
94	52	adantr 474	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑋 ∈ ℝ)
95	53	adantr 474	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝑌 ∈ ℝ)
96		ovolioo 23741	. . . . . . . . . . . . 13 ⊢ ((𝑋 ∈ ℝ ∧ 𝑌 ∈ ℝ ∧ 𝑋 ≤ 𝑌) → (vol*‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
97	94, 95, 82, 96	syl3anc 1494	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (vol*‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
98	47, 97	syl5eq 2873	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (vol‘(𝑋(,)𝑌)) = (𝑌 − 𝑋))
99	98	oveq2d 6926	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐹‘𝐶) · (vol‘(𝑋(,)𝑌))) = ((𝐹‘𝐶) · (𝑌 − 𝑋)))
100	93, 99	eqtrd 2861	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(𝐹‘𝐶) d𝑡 = ((𝐹‘𝐶) · (𝑌 − 𝑋)))
101	100	oveq2d 6926	. . . . . . . 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 2865	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 + ((𝐹‘𝐶) · (𝑌 − 𝑋))))
103	102	oveq1d 6925	. . . . . 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 10384	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝐹‘𝐶) · (𝑌 − 𝑋)) ∈ ℂ)
105	71, 104, 74, 77	divdird 11172	. . . . . 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 11140	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (((𝐹‘𝐶) · (𝑌 − 𝑋)) / (𝑌 − 𝑋)) = (𝐹‘𝐶))
107	106	oveq2d 6926	. . . . . 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 2865	. . . . 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 10773	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((((𝐺‘𝑌) − (𝐺‘𝑋)) / (𝑌 − 𝑋)) − (𝐹‘𝐶)) = (∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡 / (𝑌 − 𝑋)))
110	109	fveq2d 6441	. . 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 14578	. . 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 10365	. . . . . . 7 ⊢ 0 ∈ ℝ
113		ltle 10452	. . . . . . 7 ⊢ ((0 ∈ ℝ ∧ (𝑌 − 𝑋) ∈ ℝ) → (0 < (𝑌 − 𝑋) → 0 ≤ (𝑌 − 𝑋)))
114	112, 73, 113	sylancr 581	. . . . . 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 14545	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘(𝑌 − 𝑋)) = (𝑌 − 𝑋))
117	116	oveq2d 6926	. . 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 2865	. 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 14559	. . . . 5 ⊢ (𝜑 → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
120	119	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
121	87	abscld 14559	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) ∈ ℝ)
122	1, 69	iblabs 24001	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ 𝐿¹)
123	121, 122	itgrecl 23970	. . . . 5 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 ∈ ℝ)
124	123	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 ∈ ℝ)
125		ftc1.e	. . . . . . 7 ⊢ (𝜑 → 𝐸 ∈ ℝ⁺)
126	125	rpred 12163	. . . . . 6 ⊢ (𝜑 → 𝐸 ∈ ℝ)
127	72, 126	remulcld 10394	. . . . 5 ⊢ (𝜑 → ((𝑌 − 𝑋) · 𝐸) ∈ ℝ)
128	127	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((𝑌 − 𝑋) · 𝐸) ∈ ℝ)
129	87, 69	itgabs 24007	. . . . 5 ⊢ (𝜑 → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ≤ ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)
130	129	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ≤ ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡)
131	76, 98	breqtrrd 4903	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (vol‘(𝑋(,)𝑌)))
132	126	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝐸 ∈ ℝ)
133		fconstmpt 5402	. . . . . . . . . 10 ⊢ ((𝑋(,)𝑌) × {𝐸}) = (𝑡 ∈ (𝑋(,)𝑌) ↦ 𝐸)
134	126	recnd 10392	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐸 ∈ ℂ)
135		iblconst 23990	. . . . . . . . . . 11 ⊢ (((𝑋(,)𝑌) ∈ dom vol ∧ (vol‘(𝑋(,)𝑌)) ∈ ℝ ∧ 𝐸 ∈ ℂ) → ((𝑋(,)𝑌) × {𝐸}) ∈ 𝐿¹)
136	37, 65, 134, 135	syl3anc 1494	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑋(,)𝑌) × {𝐸}) ∈ 𝐿¹)
137	133, 136	syl5eqelr 2911	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ 𝐸) ∈ 𝐿¹)
138	132, 137, 121, 122	iblsub 23994	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))))) ∈ 𝐿¹)
139	138	adantr 474	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶))))) ∈ 𝐿¹)
140	26, 42	sseldd 3828	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐶 ∈ ℝ)
141		ftc1.r	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑅 ∈ ℝ⁺)
142	141	rpred 12163	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑅 ∈ ℝ)
143	140, 142	resubcld 10789	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 − 𝑅) ∈ ℝ)
144	143	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) ∈ ℝ)
145	52	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑋 ∈ ℝ)
146	22, 26	sstrd 3837	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ ℝ)
147	146	sselda 3827	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 ∈ ℝ)
148		ftc1.x2	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (abs‘(𝑋 − 𝐶)) < 𝑅)
149	52, 140, 142	absdifltd 14556	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs‘(𝑋 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑋 ∧ 𝑋 < (𝐶 + 𝑅))))
150	148, 149	mpbid 224	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝐶 − 𝑅) < 𝑋 ∧ 𝑋 < (𝐶 + 𝑅)))
151	150	simpld 490	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 − 𝑅) < 𝑋)
152	151	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) < 𝑋)
153		eliooord 12528	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ (𝑋(,)𝑌) → (𝑋 < 𝑡 ∧ 𝑡 < 𝑌))
154	153	adantl 475	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝑋 < 𝑡 ∧ 𝑡 < 𝑌))
155	154	simpld 490	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑋 < 𝑡)
156	144, 145, 147, 152, 155	lttrd 10524	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 − 𝑅) < 𝑡)
157	53	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑌 ∈ ℝ)
158	140, 142	readdcld 10393	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 + 𝑅) ∈ ℝ)
159	158	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐶 + 𝑅) ∈ ℝ)
160	154	simprd 491	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 < 𝑌)
161		ftc1.y2	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (abs‘(𝑌 − 𝐶)) < 𝑅)
162	53, 140, 142	absdifltd 14556	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((abs‘(𝑌 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑌 ∧ 𝑌 < (𝐶 + 𝑅))))
163	161, 162	mpbid 224	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝐶 − 𝑅) < 𝑌 ∧ 𝑌 < (𝐶 + 𝑅)))
164	163	simprd 491	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑌 < (𝐶 + 𝑅))
165	164	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑌 < (𝐶 + 𝑅))
166	147, 157, 159, 160, 165	lttrd 10524	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 < (𝐶 + 𝑅))
167	140	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝐶 ∈ ℝ)
168	142	adantr 474	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑅 ∈ ℝ)
169	147, 167, 168	absdifltd 14556	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((abs‘(𝑡 − 𝐶)) < 𝑅 ↔ ((𝐶 − 𝑅) < 𝑡 ∧ 𝑡 < (𝐶 + 𝑅))))
170	156, 166, 169	mpbir2and 704	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (abs‘(𝑡 − 𝐶)) < 𝑅)
171		fvoveq1 6933	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑡 → (abs‘(𝑦 − 𝐶)) = (abs‘(𝑡 − 𝐶)))
172	171	breq1d 4885	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑡 → ((abs‘(𝑦 − 𝐶)) < 𝑅 ↔ (abs‘(𝑡 − 𝐶)) < 𝑅))
173	172	imbrov2fvoveq 6935	. . . . . . . . . . 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 3175	. . . . . . . . . . . 12 ⊢ (𝜑 → ∀𝑦 ∈ 𝐷 ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
176	175	adantr 474	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ∀𝑦 ∈ 𝐷 ((abs‘(𝑦 − 𝐶)) < 𝑅 → (abs‘((𝐹‘𝑦) − (𝐹‘𝐶))) < 𝐸))
177	173, 176, 23	rspcdva 3532	. . . . . . . . . 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 12159	. . . . . . . . . 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 579	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → ((abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) < 𝐸 ↔ (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺))
181	178, 180	mpbid 224	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺)
182	181	adantlr 706	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 < 𝑌) ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) ∈ ℝ⁺)
183	131, 139, 182	itggt0 24014	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < ∫(𝑋(,)𝑌)(𝐸 − (abs‘((𝐹‘𝑡) − (𝐹‘𝐶)))) d𝑡)
184	132, 137, 121, 122	itgsub 23998	. . . . . . . 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 474	. . . . . . 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 23991	. . . . . . . . . . 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 1494	. . . . . . . . . 10 ⊢ (𝜑 → ∫(𝑋(,)𝑌)𝐸 d𝑡 = (𝐸 · (vol‘(𝑋(,)𝑌))))
188	187	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)𝐸 d𝑡 = (𝐸 · (vol‘(𝑋(,)𝑌))))
189	98	oveq2d 6926	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐸 · (vol‘(𝑋(,)𝑌))) = (𝐸 · (𝑌 − 𝑋)))
190	72	recnd 10392	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑌 − 𝑋) ∈ ℂ)
191	134, 190	mulcomd 10385	. . . . . . . . . 10 ⊢ (𝜑 → (𝐸 · (𝑌 − 𝑋)) = ((𝑌 − 𝑋) · 𝐸))
192	191	adantr 474	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (𝐸 · (𝑌 − 𝑋)) = ((𝑌 − 𝑋) · 𝐸))
193	188, 189, 192	3eqtrd 2865	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)𝐸 d𝑡 = ((𝑌 − 𝑋) · 𝐸))
194	193	oveq1d 6925	. . . . . . 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 2861	. . . . . 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 4901	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 0 < (((𝑌 − 𝑋) · 𝐸) − ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡))
197	123, 127	posdifd 10946	. . . . . 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 471	. . . . 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 585	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ∫(𝑋(,)𝑌)(abs‘((𝐹‘𝑡) − (𝐹‘𝐶))) d𝑡 < ((𝑌 − 𝑋) · 𝐸))
200	120, 124, 128, 130, 199	lelttrd 10521	. . 3 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) < ((𝑌 − 𝑋) · 𝐸))
201	71	abscld 14559	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → (abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) ∈ ℝ)
202	126	adantr 474	. . . 4 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → 𝐸 ∈ ℝ)
203		ltdivmul 11235	. . . 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 1497	. . 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 249	. 2 ⊢ ((𝜑 ∧ 𝑋 < 𝑌) → ((abs‘∫(𝑋(,)𝑌)((𝐹‘𝑡) − (𝐹‘𝐶)) d𝑡) / (𝑌 − 𝑋)) < 𝐸)
206	118, 205	eqbrtrd 4897	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 198 ∧ wa 386 ∧ w3a 1111 = wceq 1656 ∈ wcel 2164 ∀wral 3117 Vcvv 3414 ∖ cdif 3795 ⊆ wss 3798 {csn 4399 class class class wbr 4875 ↦ cmpt 4954 × cxp 5344 dom cdm 5346 ‘cfv 6127 (class class class)co 6910 ℂcc 10257 ℝcr 10258 0cc0 10259 + caddc 10262 · cmul 10264 ℝ^*cxr 10397 < clt 10398 ≤ cle 10399 − cmin 10592 / cdiv 11016 ℝ⁺crp 12119 (,)cioo 12470 [,]cicc 12473 abscabs 14358 ↾_t crest 16441 TopOpenctopn 16442 ℂ_fldccnfld 20113 CnP ccnp 21407 vol*covol 23635 volcvol 23636 𝐿¹cibl 23790 ∫citg 23791

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1894 ax-4 1908 ax-5 2009 ax-6 2075 ax-7 2112 ax-8 2166 ax-9 2173 ax-10 2192 ax-11 2207 ax-12 2220 ax-13 2389 ax-ext 2803 ax-rep 4996 ax-sep 5007 ax-nul 5015 ax-pow 5067 ax-pr 5129 ax-un 7214 ax-inf2 8822 ax-cc 9579 ax-cnex 10315 ax-resscn 10316 ax-1cn 10317 ax-icn 10318 ax-addcl 10319 ax-addrcl 10320 ax-mulcl 10321 ax-mulrcl 10322 ax-mulcom 10323 ax-addass 10324 ax-mulass 10325 ax-distr 10326 ax-i2m1 10327 ax-1ne0 10328 ax-1rid 10329 ax-rnegex 10330 ax-rrecex 10331 ax-cnre 10332 ax-pre-lttri 10333 ax-pre-lttrn 10334 ax-pre-ltadd 10335 ax-pre-mulgt0 10336 ax-pre-sup 10337 ax-addf 10338 ax-mulf 10339

This theorem depends on definitions: df-bi 199 df-an 387 df-or 879 df-3or 1112 df-3an 1113 df-tru 1660 df-fal 1670 df-ex 1879 df-nf 1883 df-sb 2068 df-mo 2605 df-eu 2640 df-clab 2812 df-cleq 2818 df-clel 2821 df-nfc 2958 df-ne 3000 df-nel 3103 df-ral 3122 df-rex 3123 df-reu 3124 df-rmo 3125 df-rab 3126 df-v 3416 df-sbc 3663 df-csb 3758 df-dif 3801 df-un 3803 df-in 3805 df-ss 3812 df-pss 3814 df-symdif 4072 df-nul 4147 df-if 4309 df-pw 4382 df-sn 4400 df-pr 4402 df-tp 4404 df-op 4406 df-uni 4661 df-int 4700 df-iun 4744 df-iin 4745 df-disj 4844 df-br 4876 df-opab 4938 df-mpt 4955 df-tr 4978 df-id 5252 df-eprel 5257 df-po 5265 df-so 5266 df-fr 5305 df-se 5306 df-we 5307 df-xp 5352 df-rel 5353 df-cnv 5354 df-co 5355 df-dm 5356 df-rn 5357 df-res 5358 df-ima 5359 df-pred 5924 df-ord 5970 df-on 5971 df-lim 5972 df-suc 5973 df-iota 6090 df-fun 6129 df-fn 6130 df-f 6131 df-f1 6132 df-fo 6133 df-f1o 6134 df-fv 6135 df-isom 6136 df-riota 6871 df-ov 6913 df-oprab 6914 df-mpt2 6915 df-of 7162 df-ofr 7163 df-om 7332 df-1st 7433 df-2nd 7434 df-supp 7565 df-wrecs 7677 df-recs 7739 df-rdg 7777 df-1o 7831 df-2o 7832 df-oadd 7835 df-omul 7836 df-er 8014 df-map 8129 df-pm 8130 df-ixp 8182 df-en 8229 df-dom 8230 df-sdom 8231 df-fin 8232 df-fsupp 8551 df-fi 8592 df-sup 8623 df-inf 8624 df-oi 8691 df-card 9085 df-acn 9088 df-cda 9312 df-pnf 10400 df-mnf 10401 df-xr 10402 df-ltxr 10403 df-le 10404 df-sub 10594 df-neg 10595 df-div 11017 df-nn 11358 df-2 11421 df-3 11422 df-4 11423 df-5 11424 df-6 11425 df-7 11426 df-8 11427 df-9 11428 df-n0 11626 df-z 11712 df-dec 11829 df-uz 11976 df-q 12079 df-rp 12120 df-xneg 12239 df-xadd 12240 df-xmul 12241 df-ioo 12474 df-ioc 12475 df-ico 12476 df-icc 12477 df-fz 12627 df-fzo 12768 df-fl 12895 df-mod 12971 df-seq 13103 df-exp 13162 df-hash 13418 df-cj 14223 df-re 14224 df-im 14225 df-sqrt 14359 df-abs 14360 df-clim 14603 df-rlim 14604 df-sum 14801 df-struct 16231 df-ndx 16232 df-slot 16233 df-base 16235 df-sets 16236 df-ress 16237 df-plusg 16325 df-mulr 16326 df-starv 16327 df-sca 16328 df-vsca 16329 df-ip 16330 df-tset 16331 df-ple 16332 df-ds 16334 df-unif 16335 df-hom 16336 df-cco 16337 df-rest 16443 df-topn 16444 df-0g 16462 df-gsum 16463 df-topgen 16464 df-pt 16465 df-prds 16468 df-xrs 16522 df-qtop 16527 df-imas 16528 df-xps 16530 df-mre 16606 df-mrc 16607 df-acs 16609 df-mgm 17602 df-sgrp 17644 df-mnd 17655 df-submnd 17696 df-mulg 17902 df-cntz 18107 df-cmn 18555 df-psmet 20105 df-xmet 20106 df-met 20107 df-bl 20108 df-mopn 20109 df-cnfld 20114 df-top 21076 df-topon 21093 df-topsp 21115 df-bases 21128 df-cn 21409 df-cnp 21410 df-cmp 21568 df-tx 21743 df-hmeo 21936 df-xms 22502 df-ms 22503 df-tms 22504 df-cncf 23058 df-ovol 23637 df-vol 23638 df-mbf 23792 df-itg1 23793 df-itg2 23794 df-ibl 23795 df-itg 23796 df-0p 23843

This theorem is referenced by: ftc1lem5 24209

W3C validator