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Theorem dvreslem 25894

Description: Lemma for dvres 25896. (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 4066	. . . . . . . . . . . . . . 15 ⊢ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∩ 𝐵)
2		inss2 4166	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐵
3	1, 2	sstri 3924	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ 𝐵
4		simpr 485	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}))
5	3, 4	sselid 3913	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → 𝑧 ∈ 𝐵)
6	5	fvresd 6847	. . . . . . . . . . . 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 24766	. . . . . . . . . . . . . . . . . . 19 ⊢ 𝐾 ∈ Top
10		dvres.s	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
11		cnex 11110	. . . . . . . . . . . . . . . . . . . 20 ⊢ ℂ ∈ V
12		ssexg 5251	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑆 ⊆ ℂ ∧ ℂ ∈ V) → 𝑆 ∈ V)
13	10, 11, 12	sylancl 592	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑆 ∈ V)
14		resttop 23143	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐾 ∈ Top ∧ 𝑆 ∈ V) → (𝐾 ↾_t 𝑆) ∈ Top)
15	9, 13, 14	sylancr 593	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ Top)
16	7, 15	eqeltrid 2843	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝑇 ∈ Top)
17		inss1 4165	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∩ 𝐵) ⊆ 𝐴
18		dvres.a	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐴 ⊆ 𝑆)
19	17, 18	sstrid 3926	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝑆)
20	8	cnfldtopon 24765	. . . . . . . . . . . . . . . . . . . . 21 ⊢ 𝐾 ∈ (TopOn‘ℂ)
21		resttopon 23144	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ 𝑆 ⊆ ℂ) → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
22	20, 10, 21	sylancr 593	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (𝐾 ↾_t 𝑆) ∈ (TopOn‘𝑆))
23	7, 22	eqeltrid 2843	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝑇 ∈ (TopOn‘𝑆))
24		toponuni 22897	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑇 ∈ (TopOn‘𝑆) → 𝑆 = ∪ 𝑇)
25	23, 24	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → 𝑆 = ∪ 𝑇)
26	19, 25	sseqtrd 3951	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇)
27		eqid 2739	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ 𝑇 = ∪ 𝑇
28	27	ntrss2 23040	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑇 ∈ Top ∧ (𝐴 ∩ 𝐵) ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
29	16, 26, 28	syl2anc 590	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (𝐴 ∩ 𝐵))
30	29, 2	sstrdi 3927	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐵)
31	30	sselda 3915	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐵)
32	31	fvresd 6847	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
33	32	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → ((𝐹 ↾ 𝐵)‘𝑥) = (𝐹‘𝑥))
34	6, 33	oveq12d 7374	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥})) → (((𝐹 ↾ 𝐵)‘𝑧) − ((𝐹 ↾ 𝐵)‘𝑥)) = ((𝐹‘𝑧) − (𝐹‘𝑥)))
35	34	oveq1d 7371	. . . . . . . . . 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 5165	. . . . . . . . 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 5927	. . . . . . . . . 10 ⊢ (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = ((𝑧 ∈ (𝐴 ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥}))
39		ssdif 4074	. . . . . . . . . . 11 ⊢ ((𝐴 ∩ 𝐵) ⊆ 𝐴 → ((𝐴 ∩ 𝐵) ∖ {𝑥}) ⊆ (𝐴 ∖ {𝑥}))
40		resmpt 5989	. . . . . . . . . . 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 2762	. . . . . . . . 9 ⊢ (𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) = (𝑧 ∈ ((𝐴 ∩ 𝐵) ∖ {𝑥}) ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)))
43	36, 42	eqtr4di 2792	. . . . . . . 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 7371	. . . . . . 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 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐹:𝐴⟶ℂ)
47	18, 10	sstrd 3925	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐴 ⊆ ℂ)
48	47	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝐴 ⊆ ℂ)
49	29, 17	sstrdi 3927	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ 𝐴)
50	49	sselda 3915	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ 𝐴)
51	46, 48, 50	dvlem 25881	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) ∧ 𝑧 ∈ (𝐴 ∖ {𝑥})) → (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)) ∈ ℂ)
52	51, 37	fmptd 7055	. . . . . . . 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 4066	. . . . . . . . 9 ⊢ (𝐴 ∖ {𝑥}) ⊆ 𝐴
55	54, 48	sstrid 3926	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∖ {𝑥}) ⊆ ℂ)
56		eqid 2739	. . . . . . . 8 ⊢ (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))
57		difssd 4067	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (∪ 𝑇 ∖ 𝐴) ⊆ ∪ 𝑇)
58	26, 57	unssd 4121	. . . . . . . . . . . . 13 ⊢ (𝜑 → ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)) ⊆ ∪ 𝑇)
59		ssun1 4107	. . . . . . . . . . . . . 14 ⊢ (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))
60	59	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ ((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴)))
61	27	ntrss 23038	. . . . . . . . . . . . 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 1379	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))))
63	62, 49	ssind 4169	. . . . . . . . . . 11 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
64	18, 25	sseqtrd 3951	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐴 ⊆ ∪ 𝑇)
65	17	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 ∩ 𝐵) ⊆ 𝐴)
66		eqid 2739	. . . . . . . . . . . . . 14 ⊢ (𝑇 ↾_t 𝐴) = (𝑇 ↾_t 𝐴)
67	27, 66	restntr 23165	. . . . . . . . . . . . 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 1379	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴))
69	7	oveq1i 7366	. . . . . . . . . . . . . . 15 ⊢ (𝑇 ↾_t 𝐴) = ((𝐾 ↾_t 𝑆) ↾_t 𝐴)
70	9	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐾 ∈ Top)
71		restabs 23148	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ Top ∧ 𝐴 ⊆ 𝑆 ∧ 𝑆 ∈ V) → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
72	70, 18, 13, 71	syl3anc 1379	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((𝐾 ↾_t 𝑆) ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
73	69, 72	eqtrid 2786	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑇 ↾_t 𝐴) = (𝐾 ↾_t 𝐴))
74	73	fveq2d 6831	. . . . . . . . . . . . 13 ⊢ (𝜑 → (int‘(𝑇 ↾_t 𝐴)) = (int‘(𝐾 ↾_t 𝐴)))
75	74	fveq1d 6829	. . . . . . . . . . . 12 ⊢ (𝜑 → ((int‘(𝑇 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
76	68, 75	eqtr3d 2776	. . . . . . . . . . 11 ⊢ (𝜑 → (((int‘𝑇)‘((𝐴 ∩ 𝐵) ∪ (∪ 𝑇 ∖ 𝐴))) ∩ 𝐴) = ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
77	63, 76	sseqtrd 3951	. . . . . . . . . 10 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ⊆ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
78	77	sselda 3915	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ ((int‘(𝐾 ↾_t 𝐴))‘(𝐴 ∩ 𝐵)))
79		undif1 4404	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∪ {𝑥})
80	29	sselda 3915	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → 𝑥 ∈ (𝐴 ∩ 𝐵))
81	80	snssd 4718	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ (𝐴 ∩ 𝐵))
82	81, 17	sstrdi 3927	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → {𝑥} ⊆ 𝐴)
83		ssequn2 4118	. . . . . . . . . . . . . 14 ⊢ ({𝑥} ⊆ 𝐴 ↔ (𝐴 ∪ {𝑥}) = 𝐴)
84	82, 83	sylib 219	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐴 ∪ {𝑥}) = 𝐴)
85	79, 84	eqtrid 2786	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∖ {𝑥}) ∪ {𝑥}) = 𝐴)
86	85	oveq2d 7372	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥})) = (𝐾 ↾_t 𝐴))
87	86	fveq2d 6831	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (int‘(𝐾 ↾_t ((𝐴 ∖ {𝑥}) ∪ {𝑥}))) = (int‘(𝐾 ↾_t 𝐴)))
88		undif1 4404	. . . . . . . . . . 11 ⊢ (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = ((𝐴 ∩ 𝐵) ∪ {𝑥})
89		ssequn2 4118	. . . . . . . . . . . 12 ⊢ ({𝑥} ⊆ (𝐴 ∩ 𝐵) ↔ ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
90	81, 89	sylib 219	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐴 ∩ 𝐵) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
91	88, 90	eqtrid 2786	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → (((𝐴 ∩ 𝐵) ∖ {𝑥}) ∪ {𝑥}) = (𝐴 ∩ 𝐵))
92	87, 91	fveq12d 6834	. . . . . . . . 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 2842	. . . . . . . 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 25871	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵))) → ((𝐺 ↾ ((𝐴 ∩ 𝐵) ∖ {𝑥})) lim_ℂ 𝑥) = (𝐺 lim_ℂ 𝑥))
95	44, 94	eqtrd 2774	. . . . . 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 2825	. . . . 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 584	. . . 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 3951	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ⊆ ∪ 𝑇)
100	27	ntrin 23044	. . . . . . . 8 ⊢ ((𝑇 ∈ Top ∧ 𝐴 ⊆ ∪ 𝑇 ∧ 𝐵 ⊆ ∪ 𝑇) → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
101	16, 64, 99, 100	syl3anc 1379	. . . . . . 7 ⊢ (𝜑 → ((int‘𝑇)‘(𝐴 ∩ 𝐵)) = (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)))
102	101	eleq2d 2825	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ 𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵))))
103		elin 3899	. . . . . 6 ⊢ (𝑥 ∈ (((int‘𝑇)‘𝐴) ∩ ((int‘𝑇)‘𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵)))
104	102, 103	bitrdi 288	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ ((int‘𝑇)‘(𝐴 ∩ 𝐵)) ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑥 ∈ ((int‘𝑇)‘𝐵))))
105	104	anbi1d 637	. . . 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 280	. . 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 652	. . 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 288	. 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 2739	. . 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 6696	. . . 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 25883	. 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 25883	. . 3 ⊢ (𝜑 → (𝑥(𝑆 D 𝐹)𝑦 ↔ (𝑥 ∈ ((int‘𝑇)‘𝐴) ∧ 𝑦 ∈ (𝐺 lim_ℂ 𝑥))))
114	113	anbi1cd 641	. 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 312	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 207 ∧ wa 396 = wceq 1547 ∈ wcel 2119 Vcvv 3431 ∖ cdif 3880 ∪ cun 3881 ∩ cin 3882 ⊆ wss 3883 {csn 4555 ∪ cuni 4838 class class class wbr 5072 ↦ cmpt 5153 ↾ cres 5620 ⟶wf 6481 ‘cfv 6485 (class class class)co 7356 ℂcc 11027 − cmin 11368 / cdiv 11798 ↾_t crest 17374 TopOpenctopn 17375 ℂ_fldccnfld 21347 Topctop 22876 TopOnctopon 22893 intcnt 23000 lim_ℂ climc 25847 D cdv 25848

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 ax-pre-sup 11107

This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-tp 4560 df-op 4562 df-uni 4839 df-int 4878 df-iun 4923 df-iin 4924 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-map 8765 df-pm 8766 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-fi 9314 df-sup 9345 df-inf 9346 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-n0 12429 df-z 12516 df-dec 12636 df-uz 12780 df-q 12890 df-rp 12934 df-xneg 13054 df-xadd 13055 df-xmul 13056 df-fz 13453 df-seq 13955 df-exp 14015 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-struct 17108 df-slot 17143 df-ndx 17155 df-base 17171 df-plusg 17224 df-mulr 17225 df-starv 17226 df-tset 17230 df-ple 17231 df-ds 17233 df-unif 17234 df-rest 17376 df-topn 17377 df-topgen 17397 df-psmet 21339 df-xmet 21340 df-met 21341 df-bl 21342 df-mopn 21343 df-cnfld 21348 df-top 22877 df-topon 22894 df-topsp 22916 df-bases 22929 df-cld 23002 df-ntr 23003 df-cls 23004 df-cnp 23211 df-xms 24303 df-ms 24304 df-limc 25851 df-dv 25852

This theorem is referenced by: dvres 25896

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