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Theorem dvreslem 25878

Description: Lemma for dvres 25880. (Contributed by Mario Carneiro, 8-Aug-2014.) (Revised by Mario Carneiro, 28-Dec-2016.) Commute the consequent and shorten proof. (Revised by Peter Mazsa, 2-Oct-2022.)

**Hypotheses**
Ref	Expression
dvres.k	⊢ 𝐾 = (TopOpen‘ℂ_fld)
dvres.t	⊢ 𝑇 = (𝐾 ↾_t 𝑆)
dvres.g	⊢ 𝐺 = (𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
dvres.s	⊢ (𝜑 → 𝑆 ⊆ ℂ)
dvres.f	⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
dvres.a	⊢ (𝜑 → 𝐴 ⊆ 𝑆)
dvres.b	⊢ (𝜑 → 𝐵 ⊆ 𝑆)
dvres.y	⊢ (𝜑 → 𝑦 ∈ ℂ)

**Assertion**
Ref	Expression
dvreslem	⊢ (𝜑 → (𝑥(𝑆 D (𝐹 ↾ 𝐵))𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘𝐵) ∧ 𝑥(𝑆 D 𝐹)𝑦)))

Distinct variable groups: 𝑥,𝑦,𝑧,𝐴 𝑥,𝐵,𝑦,𝑧 𝑥,𝐹,𝑦,𝑧 𝑥,𝑆,𝑦,𝑧 𝑥,𝑇,𝑦,𝑧 𝑧,𝐾 𝜑,𝑧 Allowed substitution hints: 𝜑(𝑥,𝑦) 𝐺(𝑥,𝑦,𝑧) 𝐾(𝑥,𝑦)

**Proof of Theorem dvreslem**
Step	Hyp	Ref	Expression
1		difss 4090	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∩ 𝐵)
2		inss2 4192	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵
3	1, 2	sstri 3945	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ 𝐵
4		simpr 484	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}))
5	3, 4	sselid 3933	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ 𝐵)
6	5	fvresd 6862	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → ((𝐹 ↾ 𝐵)‘𝑧) = (𝐹‘𝑧))
7		dvres.t	. . . . . . . . . . . . . . . . . 18 ⊢ 𝑇 = (𝐾 ↾_t 𝑆)
8		dvres.k	. . . . . . . . . . . . . . . . . . . 20 ⊢ 𝐾 = (TopOpen‘ℂ_fld)
9	8	cnfldtop 24739	. . . . . . . . . . . . . . . . . . 19 ⊢ 𝐾 ∈ Top
10		dvres.s	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
11		cnex 11119	. . . . . . . . . . . . . . . . . . . 20 ⊢ ℂ ∈ V
12		ssexg 5270	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ⊆ ℂ ∧ ℂ ∈ V) → 𝑆 ∈ V)
13	10, 11, 12	sylancl 587	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑆 ∈ V)
14		resttop 23116	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐾 ∈ Top ∧ 𝑆 ∈ V) → (𝐾 ↾_t 𝑆) ∈ Top)
15	9, 13, 14	sylancr 588	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ Top)
16	7, 15	eqeltrid 2841	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝑇 ∈ Top)
17		inss1 4191	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐴
18		dvres.a	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐴 ⊆ 𝑆)
19	17, 18	sstrid 3947	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝑆)
20	8	cnfldtopon 24738	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 𝐾 ∈ (TopOn‘ℂ)
21		resttopon 23117	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ 𝑆 ⊆ ℂ) → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
22	20, 10, 21	sylancr 588	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
23	7, 22	eqeltrid 2841	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑇 ∈ (TopOn‘𝑆))
24		toponuni 22870	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑇 ∈ (TopOn‘𝑆) → 𝑆 = ∪ 𝑇)
25	23, 24	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝑆 = ∪ 𝑇)
26	19, 25	sseqtrd 3972	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇)
27		eqid 2737	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ 𝑇 = ∪ 𝑇
28	27	ntrss2 23013	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑇 ∈ Top ∧ (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
29	16, 26, 28	syl2anc 585	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
30	29, 2	sstrdi 3948	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐵)
31	30	sselda 3935	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐵)
32	31	fvresd 6862	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
33	32	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
34	6, 33	oveq12d 7386	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → (((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) = ((𝐹‘𝑧) − (𝐹‘𝑥)))
35	34	oveq1d 7383	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥)) = (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
36	35	mpteq2dva 5193	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))))
37		dvres.g	. . . . . . . . . . 11 ⊢ 𝐺 = (𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
38	37	reseq1i 5942	. . . . . . . . . 10 ⊢ (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = ((𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥}))
39		ssdif 4098	. . . . . . . . . . 11 ⊢ ((𝐴 ∩ 𝐵) ⊆ 𝐴 → ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∖ {𝑥}))
40		resmpt 6004	. . . . . . . . . . 11 ⊢ (((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∖ {𝑥}) → ((𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))))
41	17, 39, 40	mp2b 10	. . . . . . . . . 10 ⊢ ((𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
42	38, 41	eqtri 2760	. . . . . . . . 9 ⊢ (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
43	36, 42	eqtr4di 2790	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) = (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})))
44	43	oveq1d 7383	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥) = ((𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) lim_ℂ 𝑥))
45		dvres.f	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
46	45	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐹:𝐴⟶ℂ)
47	18, 10	sstrd 3946	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐴 ⊆ ℂ)
48	47	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐴 ⊆ ℂ)
49	29, 17	sstrdi 3948	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐴)
50	49	sselda 3935	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐴)
51	46, 48, 50	dvlem 25865	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ (𝐴 ∖ {𝑥})) → (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)) ∈ ℂ)
52	51, 37	fmptd 7068	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐺:(𝐴 ∖ {𝑥})⟶ℂ)
53	17, 39	mp1i 13	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∖ {𝑥}))
54		difss 4090	. . . . . . . . 9 ⊢ (𝐴 ∖ {𝑥}) ⊆ 𝐴
55	54, 48	sstrid 3947	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∖ {𝑥}) ⊆ ℂ)
56		eqid 2737	. . . . . . . 8 ⊢ (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))
57		difssd 4091	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (∪ 𝑇 ∖ 𝐴) ⊆ ∪ 𝑇)
58	26, 57	unssd 4146	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)) ⊆ ∪ 𝑇)
59		ssun1 4132	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))
60	59	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)))
61	27	ntrss 23011	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Top ∧ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)) ⊆ ∪ 𝑇 ∧ (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))))
62	16, 58, 60, 61	syl3anc 1374	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))))
63	62, 49	ssind 4195	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
64	18, 25	sseqtrd 3972	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐴 ⊆ ∪ 𝑇)
65	17	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝐴)
66		eqid 2737	. . . . . . . . . . . . . 14 ⊢ (𝑇 ↾_t 𝐴) = (𝑇 ↾_t 𝐴)
67	27, 66	restntr 23138	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Top ∧ 𝐴 ⊆ ∪ 𝑇 ∧ (𝐴 ∩ 𝐵) ⊆ 𝐴) → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
68	16, 64, 65, 67	syl3anc 1374	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
69	7	oveq1i 7378	. . . . . . . . . . . . . . 15 ⊢ (𝑇 ↾_t 𝐴) = ((𝐾 ↾_t 𝑆) ↾_t 𝐴)
70	9	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐾 ∈ Top)
71		restabs 23121	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ Top ∧ 𝐴 ⊆ 𝑆 ∧ 𝑆 ∈ V) → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
72	70, 18, 13, 71	syl3anc 1374	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
73	69, 72	eqtrid 2784	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑇 ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
74	73	fveq2d 6846	. . . . . . . . . . . . 13 ⊢ (𝜑 → (int‘(𝑇 ↾_t 𝐴)) = (int‘(𝐾 ↾_t 𝐴)))
75	74	fveq1d 6844	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
76	68, 75	eqtr3d 2774	. . . . . . . . . . 11 ⊢ (𝜑 → (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
77	63, 76	sseqtrd 3972	. . . . . . . . . 10 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
78	77	sselda 3935	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
79		undif1 4430	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∪ {𝑥})
80	29	sselda 3935	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ (𝐴 ∩ 𝐵))
81	80	snssd 4767	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ (𝐴 ∩ 𝐵))
82	81, 17	sstrdi 3948	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ 𝐴)
83		ssequn2 4143	. . . . . . . . . . . . . 14 ⊢ ({𝑥} ⊆ 𝐴 ↔ (𝐴 ∪ {𝑥}) = 𝐴)
84	82, 83	sylib 218	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∪ {𝑥}) = 𝐴)
85	79, 84	eqtrid 2784	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴)
86	85	oveq2d 7384	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t 𝐴))
87	86	fveq2d 6846	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (int‘(𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))) = (int‘(𝐾 ↾_t 𝐴)))
88		undif1 4430	. . . . . . . . . . 11 ⊢ (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = ((𝐴 ∩ 𝐵) ∪ {𝑥})
89		ssequn2 4143	. . . . . . . . . . . 12 ⊢ ({𝑥} ⊆ (𝐴 ∩ 𝐵) ↔ ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
90	81, 89	sylib 218	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
91	88, 90	eqtrid 2784	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
92	87, 91	fveq12d 6849	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((int‘(𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})))‘(((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥})) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
93	78, 92	eleqtrrd 2840	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ ((int‘(𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})))‘(((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥})))
94	52, 53, 55, 8, 56, 93	limcres 25855	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) lim_ℂ 𝑥) = (𝐺 lim_ℂ 𝑥))
95	44, 94	eqtrd 2772	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥) = (𝐺 lim_ℂ 𝑥))
96	95	eleq2d 2823	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝑦 ∈ ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥) ↔ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)))
97	96	pm5.32da 579	. . . 4 ⊢ (𝜑 → ((𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ↔ (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
98		dvres.b	. . . . . . . . 9 ⊢ (𝜑 → 𝐵 ⊆ 𝑆)
99	98, 25	sseqtrd 3972	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ⊆ ∪ 𝑇)
100	27	ntrin 23017	. . . . . . . 8 ⊢ ((𝑇 ∈ Top ∧ 𝐴 ⊆ ∪ 𝑇 ∧ 𝐵 ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
101	16, 64, 99, 100	syl3anc 1374	. . . . . . 7 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
102	101	eleq2d 2823	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ 𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵))))
103		elin 3919	. . . . . 6 ⊢ (𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)))
104	102, 103	bitrdi 287	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵))))
105	104	anbi1d 632	. . . 4 ⊢ (𝜑 → ((𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)) ↔ ((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
106	97, 105	bitrd 279	. . 3 ⊢ (𝜑 → ((𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ↔ ((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
107		an32 647	. . 3 ⊢ (((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)) ↔ ((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)))
108	106, 107	bitrdi 287	. 2 ⊢ (𝜑 → ((𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ↔ ((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵))))
109		eqid 2737	. . 3 ⊢ (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥)))
110		fresin 6711	. . . 4 ⊢ (𝐹:𝐴⟶ℂ → (𝐹 ↾ 𝐵):(𝐴 ∩ 𝐵)⟶ℂ)
111	45, 110	syl 17	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐵):(𝐴 ∩ 𝐵)⟶ℂ)
112	7, 8, 109, 10, 111, 19	eldv 25867	. 2 ⊢ (𝜑 → (𝑥(𝑆 D (𝐹 ↾ 𝐵))𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ∧ 𝑦 ∈ ((𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ ((((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥))))
113	7, 8, 37, 10, 45, 18	eldv 25867	. . 3 ⊢ (𝜑 → (𝑥(𝑆 D 𝐹)𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
114	113	anbi1cd 636	. 2 ⊢ (𝜑 → ((𝑥 ∈ ((int‘𝑇)‘𝐵) ∧ 𝑥(𝑆 D 𝐹)𝑦) ↔ ((𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥)) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵))))
115	108, 112, 114	3bitr4d 311	1 ⊢ (𝜑 → (𝑥(𝑆 D (𝐹 ↾ 𝐵))𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘𝐵) ∧ 𝑥(𝑆 D 𝐹)𝑦)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Vcvv 3442 ∖ cdif 3900 ∪ cun 3901 ∩ cin 3902 ⊆ wss 3903 {csn 4582 ∪ cuni 4865 class class class wbr 5100 ↦ cmpt 5181 ↾ cres 5634 ⟶wf 6496 ‘cfv 6500 (class class class)co 7368 ℂcc 11036 − cmin 11376 / cdiv 11806 ↾_t crest 17352 TopOpenctopn 17353 ℂ_fldccnfld 21321 Topctop 22849 TopOnctopon 22866 intcnt 22973 lim_ℂ climc 25831 D cdv 25832

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-er 8645 df-map 8777 df-pm 8778 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fi 9326 df-sup 9357 df-inf 9358 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-q 12874 df-rp 12918 df-xneg 13038 df-xadd 13039 df-xmul 13040 df-fz 13436 df-seq 13937 df-exp 13997 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-struct 17086 df-slot 17121 df-ndx 17133 df-base 17149 df-plusg 17202 df-mulr 17203 df-starv 17204 df-tset 17208 df-ple 17209 df-ds 17211 df-unif 17212 df-rest 17354 df-topn 17355 df-topgen 17375 df-psmet 21313 df-xmet 21314 df-met 21315 df-bl 21316 df-mopn 21317 df-cnfld 21322 df-top 22850 df-topon 22867 df-topsp 22889 df-bases 22902 df-cld 22975 df-ntr 22976 df-cls 22977 df-cnp 23184 df-xms 24276 df-ms 24277 df-limc 25835 df-dv 25836

This theorem is referenced by: dvres 25880

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