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Theorem dvreslem 26068

Description: Lemma for dvres 26070. (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 4190	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵
3	1, 2	sstri 3946	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ 𝐵
4		simpr 489	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}))
5	3, 4	sselid 3935	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ 𝐵)
6	5	fvresd 6901	. . . . . . . . . . . 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 24940	. . . . . . . . . . . . . . . . . . 19 ⊢ 𝐾 ∈ Top
10		dvres.s	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
11		cnex 11176	. . . . . . . . . . . . . . . . . . . 20 ⊢ ℂ ∈ V
12		ssexg 5290	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ⊆ ℂ ∧ ℂ ∈ V) → 𝑆 ∈ V)
13	10, 11, 12	sylancl 597	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑆 ∈ V)
14		resttop 23317	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐾 ∈ Top ∧ 𝑆 ∈ V) → (𝐾 ↾_t 𝑆) ∈ Top)
15	9, 13, 14	sylancr 598	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ Top)
16	7, 15	eqeltrid 2867	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝑇 ∈ Top)
17		inss1 4189	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐴
18		dvres.a	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐴 ⊆ 𝑆)
19	17, 18	sstrid 3948	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝑆)
20	8	cnfldtopon 24939	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 𝐾 ∈ (TopOn‘ℂ)
21		resttopon 23318	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ 𝑆 ⊆ ℂ) → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
22	20, 10, 21	sylancr 598	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
23	7, 22	eqeltrid 2867	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑇 ∈ (TopOn‘𝑆))
24		toponuni 23071	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑇 ∈ (TopOn‘𝑆) → 𝑆 = ∪ 𝑇)
25	23, 24	syl 18	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝑆 = ∪ 𝑇)
26	19, 25	sseqtrd 3973	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇)
27		eqid 2763	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ 𝑇 = ∪ 𝑇
28	27	ntrss2 23214	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑇 ∈ Top ∧ (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
29	16, 26, 28	syl2anc 595	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
30	29, 2	sstrdi 3949	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐵)
31	30	sselda 3937	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐵)
32	31	fvresd 6901	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
33	32	adantr 485	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
34	6, 33	oveq12d 7428	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → (((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) = ((𝐹‘𝑧) − (𝐹‘𝑥)))
35	34	oveq1d 7425	. . . . . . . . . 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 5204	. . . . . . . . 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 5974	. . . . . . . . . 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 6039	. . . . . . . . . . 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 2786	. . . . . . . . 9 ⊢ (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
43	36, 42	eqtr4di 2816	. . . . . . . 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 7425	. . . . . . 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 485	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐹:𝐴⟶ℂ)
47	18, 10	sstrd 3947	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐴 ⊆ ℂ)
48	47	adantr 485	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐴 ⊆ ℂ)
49	29, 17	sstrdi 3949	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐴)
50	49	sselda 3937	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐴)
51	46, 48, 50	dvlem 26055	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ (𝐴 ∖ {𝑥})) → (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)) ∈ ℂ)
52	51, 37	fmptd 7109	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐺:(𝐴 ∖ {𝑥})⟶ℂ)
53	17, 39	mp1i 14	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∖ {𝑥}))
54		difss 4090	. . . . . . . . 9 ⊢ (𝐴 ∖ {𝑥}) ⊆ 𝐴
55	54, 48	sstrid 3948	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∖ {𝑥}) ⊆ ℂ)
56		eqid 2763	. . . . . . . 8 ⊢ (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))
57		difssd 4091	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (∪ 𝑇 ∖ 𝐴) ⊆ ∪ 𝑇)
58	26, 57	unssd 4145	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)) ⊆ ∪ 𝑇)
59		ssun1 4131	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))
60	59	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)))
61	27	ntrss 23212	. . . . . . . . . . . . 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 1398	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))))
63	62, 49	ssind 4193	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
64	18, 25	sseqtrd 3973	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐴 ⊆ ∪ 𝑇)
65	17	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝐴)
66		eqid 2763	. . . . . . . . . . . . . 14 ⊢ (𝑇 ↾_t 𝐴) = (𝑇 ↾_t 𝐴)
67	27, 66	restntr 23339	. . . . . . . . . . . . 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 1398	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
69	7	oveq1i 7420	. . . . . . . . . . . . . . 15 ⊢ (𝑇 ↾_t 𝐴) = ((𝐾 ↾_t 𝑆) ↾_t 𝐴)
70	9	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐾 ∈ Top)
71		restabs 23322	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ Top ∧ 𝐴 ⊆ 𝑆 ∧ 𝑆 ∈ V) → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
72	70, 18, 13, 71	syl3anc 1398	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
73	69, 72	eqtrid 2810	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑇 ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
74	73	fveq2d 6885	. . . . . . . . . . . . 13 ⊢ (𝜑 → (int‘(𝑇 ↾_t 𝐴)) = (int‘(𝐾 ↾_t 𝐴)))
75	74	fveq1d 6883	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
76	68, 75	eqtr3d 2800	. . . . . . . . . . 11 ⊢ (𝜑 → (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
77	63, 76	sseqtrd 3973	. . . . . . . . . 10 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
78	77	sselda 3937	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
79		undif1 4437	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∪ {𝑥})
80	29	sselda 3937	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ (𝐴 ∩ 𝐵))
81	80	snssd 4752	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ (𝐴 ∩ 𝐵))
82	81, 17	sstrdi 3949	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ 𝐴)
83		ssequn2 4142	. . . . . . . . . . . . . 14 ⊢ ({𝑥} ⊆ 𝐴 ↔ (𝐴 ∪ {𝑥}) = 𝐴)
84	82, 83	sylib 221	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∪ {𝑥}) = 𝐴)
85	79, 84	eqtrid 2810	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴)
86	85	oveq2d 7426	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t 𝐴))
87	86	fveq2d 6885	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (int‘(𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))) = (int‘(𝐾 ↾_t 𝐴)))
88		undif1 4437	. . . . . . . . . . 11 ⊢ (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = ((𝐴 ∩ 𝐵) ∪ {𝑥})
89		ssequn2 4142	. . . . . . . . . . . 12 ⊢ ({𝑥} ⊆ (𝐴 ∩ 𝐵) ↔ ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
90	81, 89	sylib 221	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
91	88, 90	eqtrid 2810	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
92	87, 91	fveq12d 6888	. . . . . . . . 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 2866	. . . . . . . 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 26045	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) lim_ℂ 𝑥) = (𝐺 lim_ℂ 𝑥))
95	44, 94	eqtrd 2798	. . . . . 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 2849	. . . . 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 589	. . . 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 3973	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ⊆ ∪ 𝑇)
100	27	ntrin 23218	. . . . . . . 8 ⊢ ((𝑇 ∈ Top ∧ 𝐴 ⊆ ∪ 𝑇 ∧ 𝐵 ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
101	16, 64, 99, 100	syl3anc 1398	. . . . . . 7 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
102	101	eleq2d 2849	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ 𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵))))
103		elin 3921	. . . . . 6 ⊢ (𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)))
104	102, 103	bitrdi 290	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵))))
105	104	anbi1d 642	. . . 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 282	. . 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 658	. . 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 290	. 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 2763	. . 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 6747	. . . 4 ⊢ (𝐹:𝐴⟶ℂ → (𝐹 ↾ 𝐵):(𝐴 ∩ 𝐵)⟶ℂ)
111	45, 110	syl 18	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐵):(𝐴 ∩ 𝐵)⟶ℂ)
112	7, 8, 109, 10, 111, 19	eldv 26057	. 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 26057	. . 3 ⊢ (𝜑 → (𝑥(𝑆 D 𝐹)𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
114	113	anbi1cd 646	. 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 314	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 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 Vcvv 3455 ∖ cdif 3902 ∪ cun 3903 ∩ cin 3904 ⊆ wss 3905 {csn 4589 ∪ cuni 4872 class class class wbr 5109 ↦ cmpt 5192 ↾ cres 5663 ⟶wf 6532 ‘cfv 6536 (class class class)co 7410 ℂcc 11093 − cmin 11436 / cdiv 11866 ↾_t crest 17468 TopOpenctopn 17469 ℂ_fldccnfld 21522 Topctop 23050 TopOnctopon 23067 intcnt 23174 lim_ℂ climc 26021 D cdv 26022

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 ax-pre-sup 11173

This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-iin 4959 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fi 9367 df-sup 9398 df-inf 9399 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-div 11867 df-nn 12229 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 df-n0 12500 df-z 12587 df-dec 12707 df-uz 12858 df-q 12968 df-rp 13012 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-fz 13531 df-seq 14034 df-exp 14094 df-cj 15146 df-re 15147 df-im 15148 df-sqrt 15282 df-abs 15283 df-struct 17202 df-slot 17237 df-ndx 17249 df-base 17265 df-plusg 17318 df-mulr 17319 df-starv 17320 df-tset 17324 df-ple 17325 df-ds 17327 df-unif 17328 df-rest 17470 df-topn 17471 df-topgen 17491 df-psmet 21514 df-xmet 21515 df-met 21516 df-bl 21517 df-mopn 21518 df-cnfld 21523 df-top 23051 df-topon 23068 df-topsp 23090 df-bases 23103 df-cld 23176 df-ntr 23177 df-cls 23178 df-cnp 23385 df-xms 24477 df-ms 24478 df-limc 26025 df-dv 26026

This theorem is referenced by: dvres 26070

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