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Theorem limcflf 25390

Description: The limit operator can be expressed as a filter limit, from the filter of neighborhoods of 𝐵 restricted to 𝐴 ∖ {𝐵}, to the topology of the complex numbers. (If 𝐵 is not a limit point of 𝐴, then it is still formally a filter limit, but the neighborhood filter is not a proper filter in this case.) (Contributed by Mario Carneiro, 25-Dec-2016.)

**Hypotheses**
Ref	Expression
limcflf.f	⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
limcflf.a	⊢ (𝜑 → 𝐴 ⊆ ℂ)
limcflf.b	⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐾)‘𝐴))
limcflf.k	⊢ 𝐾 = (TopOpen‘ℂ_fld)
limcflf.c	⊢ 𝐶 = (𝐴 ∖ {𝐵})
limcflf.l	⊢ 𝐿 = (((nei‘𝐾)‘{𝐵}) ↾_t 𝐶)

**Assertion**
Ref	Expression
limcflf	⊢ (𝜑 → (𝐹 lim_ℂ 𝐵) = ((𝐾 fLimf 𝐿)‘(𝐹 ↾ 𝐶)))

Proof of Theorem limcflf Dummy variables 𝑡 𝑠 𝑢 𝑤 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		vex 3479	. . . . . . . . . . 11 ⊢ 𝑡 ∈ V
2	1	inex1 5317	. . . . . . . . . 10 ⊢ (𝑡 ∩ 𝐶) ∈ V
3	2	rgenw 3066	. . . . . . . . 9 ⊢ ∀𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝑡 ∩ 𝐶) ∈ V
4		eqid 2733	. . . . . . . . . 10 ⊢ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶)) = (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶))
5		imaeq2 6054	. . . . . . . . . . . 12 ⊢ (𝑠 = (𝑡 ∩ 𝐶) → ((𝐹 ↾ 𝐶) “ 𝑠) = ((𝐹 ↾ 𝐶) “ (𝑡 ∩ 𝐶)))
6		inss2 4229	. . . . . . . . . . . . 13 ⊢ (𝑡 ∩ 𝐶) ⊆ 𝐶
7		resima2 6015	. . . . . . . . . . . . 13 ⊢ ((𝑡 ∩ 𝐶) ⊆ 𝐶 → ((𝐹 ↾ 𝐶) “ (𝑡 ∩ 𝐶)) = (𝐹 “ (𝑡 ∩ 𝐶)))
8	6, 7	ax-mp 5	. . . . . . . . . . . 12 ⊢ ((𝐹 ↾ 𝐶) “ (𝑡 ∩ 𝐶)) = (𝐹 “ (𝑡 ∩ 𝐶))
9	5, 8	eqtrdi 2789	. . . . . . . . . . 11 ⊢ (𝑠 = (𝑡 ∩ 𝐶) → ((𝐹 ↾ 𝐶) “ 𝑠) = (𝐹 “ (𝑡 ∩ 𝐶)))
10	9	sseq1d 4013	. . . . . . . . . 10 ⊢ (𝑠 = (𝑡 ∩ 𝐶) → (((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢 ↔ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢))
11	4, 10	rexrnmptw 7094	. . . . . . . . 9 ⊢ (∀𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝑡 ∩ 𝐶) ∈ V → (∃𝑠 ∈ ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶))((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢 ↔ ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢))
12	3, 11	mp1i 13	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (∃𝑠 ∈ ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶))((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢 ↔ ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢))
13		limcflf.l	. . . . . . . . . 10 ⊢ 𝐿 = (((nei‘𝐾)‘{𝐵}) ↾_t 𝐶)
14		fvex 6902	. . . . . . . . . . 11 ⊢ ((nei‘𝐾)‘{𝐵}) ∈ V
15		limcflf.c	. . . . . . . . . . . . . . 15 ⊢ 𝐶 = (𝐴 ∖ {𝐵})
16		difss 4131	. . . . . . . . . . . . . . 15 ⊢ (𝐴 ∖ {𝐵}) ⊆ 𝐴
17	15, 16	eqsstri 4016	. . . . . . . . . . . . . 14 ⊢ 𝐶 ⊆ 𝐴
18		limcflf.a	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ⊆ ℂ)
19	17, 18	sstrid 3993	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐶 ⊆ ℂ)
20		cnex 11188	. . . . . . . . . . . . . 14 ⊢ ℂ ∈ V
21	20	ssex 5321	. . . . . . . . . . . . 13 ⊢ (𝐶 ⊆ ℂ → 𝐶 ∈ V)
22	19, 21	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐶 ∈ V)
23	22	ad2antrr 725	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → 𝐶 ∈ V)
24		restval 17369	. . . . . . . . . . 11 ⊢ ((((nei‘𝐾)‘{𝐵}) ∈ V ∧ 𝐶 ∈ V) → (((nei‘𝐾)‘{𝐵}) ↾_t 𝐶) = ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶)))
25	14, 23, 24	sylancr 588	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (((nei‘𝐾)‘{𝐵}) ↾_t 𝐶) = ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶)))
26	13, 25	eqtrid 2785	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → 𝐿 = ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶)))
27	26	rexeqdv 3327	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢 ↔ ∃𝑠 ∈ ran (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↦ (𝑡 ∩ 𝐶))((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))
28		limcflf.k	. . . . . . . . . . . . . 14 ⊢ 𝐾 = (TopOpen‘ℂ_fld)
29	28	cnfldtop 24292	. . . . . . . . . . . . 13 ⊢ 𝐾 ∈ Top
30		opnneip 22615	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ Top ∧ 𝑤 ∈ 𝐾 ∧ 𝐵 ∈ 𝑤) → 𝑤 ∈ ((nei‘𝐾)‘{𝐵}))
31	29, 30	mp3an1 1449	. . . . . . . . . . . 12 ⊢ ((𝑤 ∈ 𝐾 ∧ 𝐵 ∈ 𝑤) → 𝑤 ∈ ((nei‘𝐾)‘{𝐵}))
32		id 22	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 = 𝑤 → 𝑡 = 𝑤)
33	15	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 = 𝑤 → 𝐶 = (𝐴 ∖ {𝐵}))
34	32, 33	ineq12d 4213	. . . . . . . . . . . . . . 15 ⊢ (𝑡 = 𝑤 → (𝑡 ∩ 𝐶) = (𝑤 ∩ (𝐴 ∖ {𝐵})))
35	34	imaeq2d 6058	. . . . . . . . . . . . . 14 ⊢ (𝑡 = 𝑤 → (𝐹 “ (𝑡 ∩ 𝐶)) = (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))))
36	35	sseq1d 4013	. . . . . . . . . . . . 13 ⊢ (𝑡 = 𝑤 → ((𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢 ↔ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢))
37	36	rspcev 3613	. . . . . . . . . . . 12 ⊢ ((𝑤 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) → ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)
38	31, 37	sylan 581	. . . . . . . . . . 11 ⊢ (((𝑤 ∈ 𝐾 ∧ 𝐵 ∈ 𝑤) ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) → ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)
39	38	anasss 468	. . . . . . . . . 10 ⊢ ((𝑤 ∈ 𝐾 ∧ (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢)) → ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)
40	39	rexlimiva 3148	. . . . . . . . 9 ⊢ (∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) → ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)
41		simprl 770	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → 𝑡 ∈ ((nei‘𝐾)‘{𝐵}))
42	28	cnfldtopon 24291	. . . . . . . . . . . . . . 15 ⊢ 𝐾 ∈ (TopOn‘ℂ)
43	42	toponunii 22410	. . . . . . . . . . . . . 14 ⊢ ℂ = ∪ 𝐾
44	43	neii1 22602	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ Top ∧ 𝑡 ∈ ((nei‘𝐾)‘{𝐵})) → 𝑡 ⊆ ℂ)
45	29, 41, 44	sylancr 588	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → 𝑡 ⊆ ℂ)
46	43	ntropn 22545	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ Top ∧ 𝑡 ⊆ ℂ) → ((int‘𝐾)‘𝑡) ∈ 𝐾)
47	29, 45, 46	sylancr 588	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → ((int‘𝐾)‘𝑡) ∈ 𝐾)
48	43	lpss 22638	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ Top ∧ 𝐴 ⊆ ℂ) → ((limPt‘𝐾)‘𝐴) ⊆ ℂ)
49	29, 18, 48	sylancr 588	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ((limPt‘𝐾)‘𝐴) ⊆ ℂ)
50		limcflf.b	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐵 ∈ ((limPt‘𝐾)‘𝐴))
51	49, 50	sseldd 3983	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐵 ∈ ℂ)
52	51	snssd 4812	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → {𝐵} ⊆ ℂ)
53	52	ad3antrrr 729	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → {𝐵} ⊆ ℂ)
54	43	neiint 22600	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ Top ∧ {𝐵} ⊆ ℂ ∧ 𝑡 ⊆ ℂ) → (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↔ {𝐵} ⊆ ((int‘𝐾)‘𝑡)))
55	29, 53, 45, 54	mp3an2i 1467	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ↔ {𝐵} ⊆ ((int‘𝐾)‘𝑡)))
56	41, 55	mpbid 231	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → {𝐵} ⊆ ((int‘𝐾)‘𝑡))
57	51	ad3antrrr 729	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → 𝐵 ∈ ℂ)
58		snssg 4787	. . . . . . . . . . . . 13 ⊢ (𝐵 ∈ ℂ → (𝐵 ∈ ((int‘𝐾)‘𝑡) ↔ {𝐵} ⊆ ((int‘𝐾)‘𝑡)))
59	57, 58	syl 17	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → (𝐵 ∈ ((int‘𝐾)‘𝑡) ↔ {𝐵} ⊆ ((int‘𝐾)‘𝑡)))
60	56, 59	mpbird 257	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → 𝐵 ∈ ((int‘𝐾)‘𝑡))
61	43	ntrss2 22553	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ Top ∧ 𝑡 ⊆ ℂ) → ((int‘𝐾)‘𝑡) ⊆ 𝑡)
62	29, 45, 61	sylancr 588	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → ((int‘𝐾)‘𝑡) ⊆ 𝑡)
63		ssrin 4233	. . . . . . . . . . . . 13 ⊢ (((int‘𝐾)‘𝑡) ⊆ 𝑡 → (((int‘𝐾)‘𝑡) ∩ 𝐶) ⊆ (𝑡 ∩ 𝐶))
64		imass2 6099	. . . . . . . . . . . . 13 ⊢ ((((int‘𝐾)‘𝑡) ∩ 𝐶) ⊆ (𝑡 ∩ 𝐶) → (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ (𝐹 “ (𝑡 ∩ 𝐶)))
65	62, 63, 64	3syl 18	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ (𝐹 “ (𝑡 ∩ 𝐶)))
66		simprr 772	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)
67	65, 66	sstrd 3992	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ 𝑢)
68		eleq2 2823	. . . . . . . . . . . . 13 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → (𝐵 ∈ 𝑤 ↔ 𝐵 ∈ ((int‘𝐾)‘𝑡)))
69	15	ineq2i 4209	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 ∩ 𝐶) = (𝑤 ∩ (𝐴 ∖ {𝐵}))
70		ineq1 4205	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → (𝑤 ∩ 𝐶) = (((int‘𝐾)‘𝑡) ∩ 𝐶))
71	69, 70	eqtr3id 2787	. . . . . . . . . . . . . . 15 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → (𝑤 ∩ (𝐴 ∖ {𝐵})) = (((int‘𝐾)‘𝑡) ∩ 𝐶))
72	71	imaeq2d 6058	. . . . . . . . . . . . . 14 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) = (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)))
73	72	sseq1d 4013	. . . . . . . . . . . . 13 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → ((𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢 ↔ (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ 𝑢))
74	68, 73	anbi12d 632	. . . . . . . . . . . 12 ⊢ (𝑤 = ((int‘𝐾)‘𝑡) → ((𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) ↔ (𝐵 ∈ ((int‘𝐾)‘𝑡) ∧ (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ 𝑢)))
75	74	rspcev 3613	. . . . . . . . . . 11 ⊢ ((((int‘𝐾)‘𝑡) ∈ 𝐾 ∧ (𝐵 ∈ ((int‘𝐾)‘𝑡) ∧ (𝐹 “ (((int‘𝐾)‘𝑡) ∩ 𝐶)) ⊆ 𝑢)) → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢))
76	47, 60, 67, 75	syl12anc 836	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) ∧ (𝑡 ∈ ((nei‘𝐾)‘{𝐵}) ∧ (𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢)) → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢))
77	76	rexlimdvaa 3157	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢 → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢)))
78	40, 77	impbid2 225	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) ↔ ∃𝑡 ∈ ((nei‘𝐾)‘{𝐵})(𝐹 “ (𝑡 ∩ 𝐶)) ⊆ 𝑢))
79	12, 27, 78	3bitr4rd 312	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ (𝑢 ∈ 𝐾 ∧ 𝑥 ∈ 𝑢)) → (∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) ↔ ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))
80	79	anassrs 469	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℂ) ∧ 𝑢 ∈ 𝐾) ∧ 𝑥 ∈ 𝑢) → (∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢) ↔ ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))
81	80	pm5.74da 803	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ ℂ) ∧ 𝑢 ∈ 𝐾) → ((𝑥 ∈ 𝑢 → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢)) ↔ (𝑥 ∈ 𝑢 → ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢)))
82	81	ralbidva 3176	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ ℂ) → (∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢)) ↔ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢)))
83	82	pm5.32da 580	. . 3 ⊢ (𝜑 → ((𝑥 ∈ ℂ ∧ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢))) ↔ (𝑥 ∈ ℂ ∧ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))))
84		limcflf.f	. . . 4 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
85	84, 18, 51, 28	ellimc2 25386	. . 3 ⊢ (𝜑 → (𝑥 ∈ (𝐹 lim_ℂ 𝐵) ↔ (𝑥 ∈ ℂ ∧ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑤 ∈ 𝐾 (𝐵 ∈ 𝑤 ∧ (𝐹 “ (𝑤 ∩ (𝐴 ∖ {𝐵}))) ⊆ 𝑢)))))
86	84, 18, 50, 28, 15, 13	limcflflem 25389	. . . 4 ⊢ (𝜑 → 𝐿 ∈ (Fil‘𝐶))
87		fssres 6755	. . . . 5 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐶 ⊆ 𝐴) → (𝐹 ↾ 𝐶):𝐶⟶ℂ)
88	84, 17, 87	sylancl 587	. . . 4 ⊢ (𝜑 → (𝐹 ↾ 𝐶):𝐶⟶ℂ)
89		isflf 23489	. . . 4 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ 𝐿 ∈ (Fil‘𝐶) ∧ (𝐹 ↾ 𝐶):𝐶⟶ℂ) → (𝑥 ∈ ((𝐾 fLimf 𝐿)‘(𝐹 ↾ 𝐶)) ↔ (𝑥 ∈ ℂ ∧ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))))
90	42, 86, 88, 89	mp3an2i 1467	. . 3 ⊢ (𝜑 → (𝑥 ∈ ((𝐾 fLimf 𝐿)‘(𝐹 ↾ 𝐶)) ↔ (𝑥 ∈ ℂ ∧ ∀𝑢 ∈ 𝐾 (𝑥 ∈ 𝑢 → ∃𝑠 ∈ 𝐿 ((𝐹 ↾ 𝐶) “ 𝑠) ⊆ 𝑢))))
91	83, 85, 90	3bitr4d 311	. 2 ⊢ (𝜑 → (𝑥 ∈ (𝐹 lim_ℂ 𝐵) ↔ 𝑥 ∈ ((𝐾 fLimf 𝐿)‘(𝐹 ↾ 𝐶))))
92	91	eqrdv 2731	1 ⊢ (𝜑 → (𝐹 lim_ℂ 𝐵) = ((𝐾 fLimf 𝐿)‘(𝐹 ↾ 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ∀wral 3062 ∃wrex 3071 Vcvv 3475 ∖ cdif 3945 ∩ cin 3947 ⊆ wss 3948 {csn 4628 ↦ cmpt 5231 ran crn 5677 ↾ cres 5678 “ cima 5679 ⟶wf 6537 ‘cfv 6541 (class class class)co 7406 ℂcc 11105 ↾_t crest 17363 TopOpenctopn 17364 ℂ_fldccnfld 20937 Topctop 22387 TopOnctopon 22404 intcnt 22513 neicnei 22593 limPtclp 22630 Filcfil 23341 fLimf cflf 23431 lim_ℂ climc 25371

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7722 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6298 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7362 df-ov 7409 df-oprab 7410 df-mpo 7411 df-om 7853 df-1st 7972 df-2nd 7973 df-frecs 8263 df-wrecs 8294 df-recs 8368 df-rdg 8407 df-1o 8463 df-er 8700 df-map 8819 df-pm 8820 df-en 8937 df-dom 8938 df-sdom 8939 df-fin 8940 df-fi 9403 df-sup 9434 df-inf 9435 df-pnf 11247 df-mnf 11248 df-xr 11249 df-ltxr 11250 df-le 11251 df-sub 11443 df-neg 11444 df-div 11869 df-nn 12210 df-2 12272 df-3 12273 df-4 12274 df-5 12275 df-6 12276 df-7 12277 df-8 12278 df-9 12279 df-n0 12470 df-z 12556 df-dec 12675 df-uz 12820 df-q 12930 df-rp 12972 df-xneg 13089 df-xadd 13090 df-xmul 13091 df-fz 13482 df-seq 13964 df-exp 14025 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-struct 17077 df-slot 17112 df-ndx 17124 df-base 17142 df-plusg 17207 df-mulr 17208 df-starv 17209 df-tset 17213 df-ple 17214 df-ds 17216 df-unif 17217 df-rest 17365 df-topn 17366 df-topgen 17386 df-psmet 20929 df-xmet 20930 df-met 20931 df-bl 20932 df-mopn 20933 df-fbas 20934 df-fg 20935 df-cnfld 20938 df-top 22388 df-topon 22405 df-topsp 22427 df-bases 22441 df-cld 22515 df-ntr 22516 df-cls 22517 df-nei 22594 df-lp 22632 df-cnp 22724 df-fil 23342 df-fm 23434 df-flim 23435 df-flf 23436 df-xms 23818 df-ms 23819 df-limc 25375

This theorem is referenced by: limcmo 25391

W3C validator