ftc1lem1 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > ftc1lem1		Structured version Visualization version GIF version

Theorem ftc1lem1 25925

Description: Lemma for ftc1a 25927 and ftc1 25932. (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)
ftc1a.f	⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
ftc1lem1.x	⊢ (𝜑 → 𝑋 ∈ (𝐴[,]𝐵))
ftc1lem1.y	⊢ (𝜑 → 𝑌 ∈ (𝐴[,]𝐵))

**Assertion**
Ref	Expression
ftc1lem1	⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)

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

**Proof of Theorem ftc1lem1**
Step	Hyp	Ref	Expression
1		ftc1lem1.y	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ (𝐴[,]𝐵))
2		oveq2 7413	. . . . . . . 8 ⊢ (𝑥 = 𝑌 → (𝐴(,)𝑥) = (𝐴(,)𝑌))
3		itgeq1 25657	. . . . . . . 8 ⊢ ((𝐴(,)𝑥) = (𝐴(,)𝑌) → ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡 = ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡)
4	2, 3	syl 17	. . . . . . 7 ⊢ (𝑥 = 𝑌 → ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡 = ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡)
5		ftc1.g	. . . . . . 7 ⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
6		itgex 25655	. . . . . . 7 ⊢ ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡 ∈ V
7	4, 5, 6	fvmpt 6992	. . . . . 6 ⊢ (𝑌 ∈ (𝐴[,]𝐵) → (𝐺‘𝑌) = ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡)
8	1, 7	syl 17	. . . . 5 ⊢ (𝜑 → (𝐺‘𝑌) = ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡)
9	8	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝐺‘𝑌) = ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡)
10		ftc1.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ)
11	10	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝐴 ∈ ℝ)
12		ftc1.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℝ)
13		iccssre 13412	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
14	10, 12, 13	syl2anc 583	. . . . . . 7 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
15	14, 1	sseldd 3978	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ ℝ)
16	15	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝑌 ∈ ℝ)
17		ftc1lem1.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ (𝐴[,]𝐵))
18	14, 17	sseldd 3978	. . . . . . 7 ⊢ (𝜑 → 𝑋 ∈ ℝ)
19	18	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝑋 ∈ ℝ)
20		elicc2 13395	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
21	10, 12, 20	syl2anc 583	. . . . . . . . 9 ⊢ (𝜑 → (𝑋 ∈ (𝐴[,]𝐵) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵)))
22	17, 21	mpbid 231	. . . . . . . 8 ⊢ (𝜑 → (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝐵))
23	22	simp2d 1140	. . . . . . 7 ⊢ (𝜑 → 𝐴 ≤ 𝑋)
24	23	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝐴 ≤ 𝑋)
25		simpr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝑋 ≤ 𝑌)
26		elicc2 13395	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 𝑌 ∈ ℝ) → (𝑋 ∈ (𝐴[,]𝑌) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝑌)))
27	10, 15, 26	syl2anc 583	. . . . . . 7 ⊢ (𝜑 → (𝑋 ∈ (𝐴[,]𝑌) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝑌)))
28	27	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝑋 ∈ (𝐴[,]𝑌) ↔ (𝑋 ∈ ℝ ∧ 𝐴 ≤ 𝑋 ∧ 𝑋 ≤ 𝑌)))
29	19, 24, 25, 28	mpbir3and 1339	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → 𝑋 ∈ (𝐴[,]𝑌))
30	12	rexrd 11268	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
31		elicc2 13395	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
32	10, 12, 31	syl2anc 583	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑌 ∈ (𝐴[,]𝐵) ↔ (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵)))
33	1, 32	mpbid 231	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑌 ∈ ℝ ∧ 𝐴 ≤ 𝑌 ∧ 𝑌 ≤ 𝐵))
34	33	simp3d 1141	. . . . . . . . . 10 ⊢ (𝜑 → 𝑌 ≤ 𝐵)
35		iooss2 13366	. . . . . . . . . 10 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑌 ≤ 𝐵) → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
36	30, 34, 35	syl2anc 583	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝑌) ⊆ (𝐴(,)𝐵))
37		ftc1.s	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
38	36, 37	sstrd 3987	. . . . . . . 8 ⊢ (𝜑 → (𝐴(,)𝑌) ⊆ 𝐷)
39	38	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝐴(,)𝑌) ⊆ 𝐷)
40	39	sselda 3977	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≤ 𝑌) ∧ 𝑡 ∈ (𝐴(,)𝑌)) → 𝑡 ∈ 𝐷)
41		ftc1a.f	. . . . . . . 8 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
42	41	ffvelcdmda 7080	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ ℂ)
43	42	adantlr 712	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≤ 𝑌) ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ ℂ)
44	40, 43	syldan 590	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ≤ 𝑌) ∧ 𝑡 ∈ (𝐴(,)𝑌)) → (𝐹‘𝑡) ∈ ℂ)
45	22	simp3d 1141	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ≤ 𝐵)
46		iooss2 13366	. . . . . . . . 9 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑋 ≤ 𝐵) → (𝐴(,)𝑋) ⊆ (𝐴(,)𝐵))
47	30, 45, 46	syl2anc 583	. . . . . . . 8 ⊢ (𝜑 → (𝐴(,)𝑋) ⊆ (𝐴(,)𝐵))
48	47, 37	sstrd 3987	. . . . . . 7 ⊢ (𝜑 → (𝐴(,)𝑋) ⊆ 𝐷)
49		ioombl 25449	. . . . . . . 8 ⊢ (𝐴(,)𝑋) ∈ dom vol
50	49	a1i 11	. . . . . . 7 ⊢ (𝜑 → (𝐴(,)𝑋) ∈ dom vol)
51		fvexd 6900	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ V)
52	41	feqmptd 6954	. . . . . . . 8 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)))
53		ftc1.i	. . . . . . . 8 ⊢ (𝜑 → 𝐹 ∈ 𝐿¹)
54	52, 53	eqeltrrd 2828	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
55	48, 50, 51, 54	iblss 25689	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝑋) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
56	55	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝑡 ∈ (𝐴(,)𝑋) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
57	10	rexrd 11268	. . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
58		iooss1 13365	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑋) → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
59	57, 23, 58	syl2anc 583	. . . . . . . . 9 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝑌))
60	59, 36	sstrd 3987	. . . . . . . 8 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ (𝐴(,)𝐵))
61	60, 37	sstrd 3987	. . . . . . 7 ⊢ (𝜑 → (𝑋(,)𝑌) ⊆ 𝐷)
62		ioombl 25449	. . . . . . . 8 ⊢ (𝑋(,)𝑌) ∈ dom vol
63	62	a1i 11	. . . . . . 7 ⊢ (𝜑 → (𝑋(,)𝑌) ∈ dom vol)
64	61, 63, 51, 54	iblss 25689	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
65	64	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝑡 ∈ (𝑋(,)𝑌) ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
66	11, 16, 29, 44, 56, 65	itgsplitioo 25722	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ∫(𝐴(,)𝑌)(𝐹‘𝑡) d𝑡 = (∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡))
67	9, 66	eqtrd 2766	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝐺‘𝑌) = (∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡))
68		oveq2 7413	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (𝐴(,)𝑥) = (𝐴(,)𝑋))
69		itgeq1 25657	. . . . . . 7 ⊢ ((𝐴(,)𝑥) = (𝐴(,)𝑋) → ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡 = ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡)
70	68, 69	syl 17	. . . . . 6 ⊢ (𝑥 = 𝑋 → ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡 = ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡)
71		itgex 25655	. . . . . 6 ⊢ ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 ∈ V
72	70, 5, 71	fvmpt 6992	. . . . 5 ⊢ (𝑋 ∈ (𝐴[,]𝐵) → (𝐺‘𝑋) = ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡)
73	17, 72	syl 17	. . . 4 ⊢ (𝜑 → (𝐺‘𝑋) = ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡)
74	73	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → (𝐺‘𝑋) = ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡)
75	67, 74	oveq12d 7423	. 2 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ((∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡) − ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡))
76		fvexd 6900	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴(,)𝑋)) → (𝐹‘𝑡) ∈ V)
77	76, 55	itgcl 25668	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 ∈ ℂ)
78	61	sselda 3977	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → 𝑡 ∈ 𝐷)
79	78, 42	syldan 590	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑋(,)𝑌)) → (𝐹‘𝑡) ∈ ℂ)
80	79, 64	itgcl 25668	. . . 4 ⊢ (𝜑 → ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡 ∈ ℂ)
81	77, 80	pncan2d 11577	. . 3 ⊢ (𝜑 → ((∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡) − ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
82	81	adantr 480	. 2 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡 + ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡) − ∫(𝐴(,)𝑋)(𝐹‘𝑡) d𝑡) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)
83	75, 82	eqtrd 2766	1 ⊢ ((𝜑 ∧ 𝑋 ≤ 𝑌) → ((𝐺‘𝑌) − (𝐺‘𝑋)) = ∫(𝑋(,)𝑌)(𝐹‘𝑡) d𝑡)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 Vcvv 3468 ⊆ wss 3943 class class class wbr 5141 ↦ cmpt 5224 dom cdm 5669 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ℂcc 11110 ℝcr 11111 + caddc 11115 ℝ^*cxr 11251 ≤ cle 11253 − cmin 11448 (,)cioo 13330 [,]cicc 13333 volcvol 25347 𝐿¹cibl 25501 ∫citg 25502

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 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-symdif 4237 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-disj 5107 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7667 df-ofr 7668 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-2o 8468 df-er 8705 df-map 8824 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fi 9408 df-sup 9439 df-inf 9440 df-oi 9507 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-n0 12477 df-z 12563 df-uz 12827 df-q 12937 df-rp 12981 df-xneg 13098 df-xadd 13099 df-xmul 13100 df-ioo 13334 df-ico 13336 df-icc 13337 df-fz 13491 df-fzo 13634 df-fl 13763 df-mod 13841 df-seq 13973 df-exp 14033 df-hash 14296 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15438 df-rlim 15439 df-sum 15639 df-rest 17377 df-topgen 17398 df-psmet 21232 df-xmet 21233 df-met 21234 df-bl 21235 df-mopn 21236 df-top 22751 df-topon 22768 df-bases 22804 df-cmp 23246 df-ovol 25348 df-vol 25349 df-mbf 25503 df-itg1 25504 df-itg2 25505 df-ibl 25506 df-itg 25507 df-0p 25554

This theorem is referenced by: ftc1a 25927 ftc1lem4 25929 ftc1cnnclem 37072

W3C validator