Theorem cldllycmp 21707

Description: A closed subspace of a locally compact space is also locally compact. (The analogous result for open subspaces follows from the more general nllyrest 21698.) (Contributed by Mario Carneiro, 2-Mar-2015.)

Assertion

Ref	Expression
cldllycmp	⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽 ↾t 𝐴) ∈ 𝑛-Locally Comp)

Proof of Theorem cldllycmp

Dummy variables 𝑢 𝑣 𝑤 𝑥 𝑦 𝑠 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nllytop 21685	. . 3 ⊢ (𝐽 ∈ 𝑛-Locally Comp → 𝐽 ∈ Top)
2		resttop 21372	. . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽 ↾t 𝐴) ∈ Top)
3	1, 2	sylan 575	. 2 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽 ↾t 𝐴) ∈ Top)
4		elrest 16474	. . . 4 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝑥 ∈ (𝐽 ↾t 𝐴) ↔ ∃𝑢 ∈ 𝐽 𝑥 = (𝑢 ∩ 𝐴)))
5		simpll 757	. . . . . . . . . 10 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → 𝐽 ∈ 𝑛-Locally Comp)
6		simprl 761	. . . . . . . . . 10 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → 𝑢 ∈ 𝐽)
7		inss1 4053	. . . . . . . . . . 11 ⊢ (𝑢 ∩ 𝐴) ⊆ 𝑢
8		simprr 763	. . . . . . . . . . 11 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → 𝑦 ∈ (𝑢 ∩ 𝐴))
9	7, 8	sseldi 3819	. . . . . . . . . 10 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → 𝑦 ∈ 𝑢)
10		nlly2i 21688	. . . . . . . . . 10 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝑢 ∈ 𝐽 ∧ 𝑦 ∈ 𝑢) → ∃𝑠 ∈ 𝒫 𝑢∃𝑤 ∈ 𝐽 (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))
11	5, 6, 9, 10	syl3anc 1439	. . . . . . . . 9 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → ∃𝑠 ∈ 𝒫 𝑢∃𝑤 ∈ 𝐽 (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))
12	3	ad2antrr 716	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝐽 ↾t 𝐴) ∈ Top)
13	1	ad3antrrr 720	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝐽 ∈ Top)
14		simpllr 766	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝐴 ∈ (Clsd‘𝐽))
15		simprlr 770	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑤 ∈ 𝐽)
16		elrestr 16475	. . . . . . . . . . . . . . . 16 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ (Clsd‘𝐽) ∧ 𝑤 ∈ 𝐽) → (𝑤 ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
17	13, 14, 15, 16	syl3anc 1439	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑤 ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
18		simprr1 1244	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑦 ∈ 𝑤)
19		inss2 4054	. . . . . . . . . . . . . . . . 17 ⊢ (𝑢 ∩ 𝐴) ⊆ 𝐴
20		simplrr 768	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑦 ∈ (𝑢 ∩ 𝐴))
21	19, 20	sseldi 3819	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑦 ∈ 𝐴)
22	18, 21	elind 4021	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑦 ∈ (𝑤 ∩ 𝐴))
23		opnneip 21331	. . . . . . . . . . . . . . 15 ⊢ (((𝐽 ↾t 𝐴) ∈ Top ∧ (𝑤 ∩ 𝐴) ∈ (𝐽 ↾t 𝐴) ∧ 𝑦 ∈ (𝑤 ∩ 𝐴)) → (𝑤 ∩ 𝐴) ∈ ((nei‘(𝐽 ↾t 𝐴))‘{𝑦}))
24	12, 17, 22, 23	syl3anc 1439	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑤 ∩ 𝐴) ∈ ((nei‘(𝐽 ↾t 𝐴))‘{𝑦}))
25		simprr2 1246	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑤 ⊆ 𝑠)
26	25	ssrind 4060	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑤 ∩ 𝐴) ⊆ (𝑠 ∩ 𝐴))
27		inss2 4054	. . . . . . . . . . . . . . 15 ⊢ (𝑠 ∩ 𝐴) ⊆ 𝐴
28		eqid 2778	. . . . . . . . . . . . . . . . . 18 ⊢ ∪ 𝐽 = ∪ 𝐽
29	28	cldss 21241	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ (Clsd‘𝐽) → 𝐴 ⊆ ∪ 𝐽)
30	14, 29	syl 17	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝐴 ⊆ ∪ 𝐽)
31	28	restuni 21374	. . . . . . . . . . . . . . . 16 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ⊆ ∪ 𝐽) → 𝐴 = ∪ (𝐽 ↾t 𝐴))
32	13, 30, 31	syl2anc 579	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝐴 = ∪ (𝐽 ↾t 𝐴))
33	27, 32	syl5sseq 3872	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ⊆ ∪ (𝐽 ↾t 𝐴))
34		eqid 2778	. . . . . . . . . . . . . . 15 ⊢ ∪ (𝐽 ↾t 𝐴) = ∪ (𝐽 ↾t 𝐴)
35	34	ssnei2 21328	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ↾t 𝐴) ∈ Top ∧ (𝑤 ∩ 𝐴) ∈ ((nei‘(𝐽 ↾t 𝐴))‘{𝑦})) ∧ ((𝑤 ∩ 𝐴) ⊆ (𝑠 ∩ 𝐴) ∧ (𝑠 ∩ 𝐴) ⊆ ∪ (𝐽 ↾t 𝐴))) → (𝑠 ∩ 𝐴) ∈ ((nei‘(𝐽 ↾t 𝐴))‘{𝑦}))
36	12, 24, 26, 33, 35	syl22anc 829	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ∈ ((nei‘(𝐽 ↾t 𝐴))‘{𝑦}))
37		simprll 769	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑠 ∈ 𝒫 𝑢)
38	37	elpwid 4391	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑠 ⊆ 𝑢)
39	38	ssrind 4060	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ⊆ (𝑢 ∩ 𝐴))
40		vex 3401	. . . . . . . . . . . . . . . 16 ⊢ 𝑠 ∈ V
41	40	inex1 5036	. . . . . . . . . . . . . . 15 ⊢ (𝑠 ∩ 𝐴) ∈ V
42	41	elpw 4385	. . . . . . . . . . . . . 14 ⊢ ((𝑠 ∩ 𝐴) ∈ 𝒫 (𝑢 ∩ 𝐴) ↔ (𝑠 ∩ 𝐴) ⊆ (𝑢 ∩ 𝐴))
43	39, 42	sylibr 226	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ∈ 𝒫 (𝑢 ∩ 𝐴))
44	36, 43	elind 4021	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴)))
45	27	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ⊆ 𝐴)
46		restabs 21377	. . . . . . . . . . . . . . 15 ⊢ ((𝐽 ∈ Top ∧ (𝑠 ∩ 𝐴) ⊆ 𝐴 ∧ 𝐴 ∈ (Clsd‘𝐽)) → ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) = (𝐽 ↾t (𝑠 ∩ 𝐴)))
47	13, 45, 14, 46	syl3anc 1439	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) = (𝐽 ↾t (𝑠 ∩ 𝐴)))
48		inss1 4053	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 ∩ 𝐴) ⊆ 𝑠
49	48	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ⊆ 𝑠)
50		restabs 21377	. . . . . . . . . . . . . . 15 ⊢ ((𝐽 ∈ Top ∧ (𝑠 ∩ 𝐴) ⊆ 𝑠 ∧ 𝑠 ∈ 𝒫 𝑢) → ((𝐽 ↾t 𝑠) ↾t (𝑠 ∩ 𝐴)) = (𝐽 ↾t (𝑠 ∩ 𝐴)))
51	13, 49, 37, 50	syl3anc 1439	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐽 ↾t 𝑠) ↾t (𝑠 ∩ 𝐴)) = (𝐽 ↾t (𝑠 ∩ 𝐴)))
52	47, 51	eqtr4d 2817	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) = ((𝐽 ↾t 𝑠) ↾t (𝑠 ∩ 𝐴)))
53		simprr3 1248	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝐽 ↾t 𝑠) ∈ Comp)
54		incom 4028	. . . . . . . . . . . . . . 15 ⊢ (𝑠 ∩ 𝐴) = (𝐴 ∩ 𝑠)
55		eqid 2778	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∩ 𝑠) = (𝐴 ∩ 𝑠)
56		ineq1 4030	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑣 = 𝐴 → (𝑣 ∩ 𝑠) = (𝐴 ∩ 𝑠))
57	56	rspceeqv 3529	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ (Clsd‘𝐽) ∧ (𝐴 ∩ 𝑠) = (𝐴 ∩ 𝑠)) → ∃𝑣 ∈ (Clsd‘𝐽)(𝐴 ∩ 𝑠) = (𝑣 ∩ 𝑠))
58	14, 55, 57	sylancl 580	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ∃𝑣 ∈ (Clsd‘𝐽)(𝐴 ∩ 𝑠) = (𝑣 ∩ 𝑠))
59		simplrl 767	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑢 ∈ 𝐽)
60		elssuni 4702	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑢 ∈ 𝐽 → 𝑢 ⊆ ∪ 𝐽)
61	59, 60	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑢 ⊆ ∪ 𝐽)
62	38, 61	sstrd 3831	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → 𝑠 ⊆ ∪ 𝐽)
63	28	restcld 21384	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐽 ∈ Top ∧ 𝑠 ⊆ ∪ 𝐽) → ((𝐴 ∩ 𝑠) ∈ (Clsd‘(𝐽 ↾t 𝑠)) ↔ ∃𝑣 ∈ (Clsd‘𝐽)(𝐴 ∩ 𝑠) = (𝑣 ∩ 𝑠)))
64	13, 62, 63	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐴 ∩ 𝑠) ∈ (Clsd‘(𝐽 ↾t 𝑠)) ↔ ∃𝑣 ∈ (Clsd‘𝐽)(𝐴 ∩ 𝑠) = (𝑣 ∩ 𝑠)))
65	58, 64	mpbird 249	. . . . . . . . . . . . . . 15 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝐴 ∩ 𝑠) ∈ (Clsd‘(𝐽 ↾t 𝑠)))
66	54, 65	syl5eqel 2863	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → (𝑠 ∩ 𝐴) ∈ (Clsd‘(𝐽 ↾t 𝑠)))
67		cmpcld 21614	. . . . . . . . . . . . . 14 ⊢ (((𝐽 ↾t 𝑠) ∈ Comp ∧ (𝑠 ∩ 𝐴) ∈ (Clsd‘(𝐽 ↾t 𝑠))) → ((𝐽 ↾t 𝑠) ↾t (𝑠 ∩ 𝐴)) ∈ Comp)
68	53, 66, 67	syl2anc 579	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐽 ↾t 𝑠) ↾t (𝑠 ∩ 𝐴)) ∈ Comp)
69	52, 68	eqeltrd 2859	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) ∈ Comp)
70		oveq2 6930	. . . . . . . . . . . . . 14 ⊢ (𝑣 = (𝑠 ∩ 𝐴) → ((𝐽 ↾t 𝐴) ↾t 𝑣) = ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)))
71	70	eleq1d 2844	. . . . . . . . . . . . 13 ⊢ (𝑣 = (𝑠 ∩ 𝐴) → (((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp ↔ ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) ∈ Comp))
72	71	rspcev 3511	. . . . . . . . . . . 12 ⊢ (((𝑠 ∩ 𝐴) ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴)) ∧ ((𝐽 ↾t 𝐴) ↾t (𝑠 ∩ 𝐴)) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
73	44, 69, 72	syl2anc 579	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽) ∧ (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp))) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
74	73	expr 450	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) ∧ (𝑠 ∈ 𝒫 𝑢 ∧ 𝑤 ∈ 𝐽)) → ((𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
75	74	rexlimdvva 3221	. . . . . . . . 9 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → (∃𝑠 ∈ 𝒫 𝑢∃𝑤 ∈ 𝐽 (𝑦 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑠 ∧ (𝐽 ↾t 𝑠) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
76	11, 75	mpd 15	. . . . . . . 8 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢 ∈ 𝐽 ∧ 𝑦 ∈ (𝑢 ∩ 𝐴))) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
77	76	anassrs 461	. . . . . . 7 ⊢ ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢 ∈ 𝐽) ∧ 𝑦 ∈ (𝑢 ∩ 𝐴)) → ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
78	77	ralrimiva 3148	. . . . . 6 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢 ∈ 𝐽) → ∀𝑦 ∈ (𝑢 ∩ 𝐴)∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
79		pweq 4382	. . . . . . . . 9 ⊢ (𝑥 = (𝑢 ∩ 𝐴) → 𝒫 𝑥 = 𝒫 (𝑢 ∩ 𝐴))
80	79	ineq2d 4037	. . . . . . . 8 ⊢ (𝑥 = (𝑢 ∩ 𝐴) → (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥) = (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴)))
81	80	rexeqdv 3341	. . . . . . 7 ⊢ (𝑥 = (𝑢 ∩ 𝐴) → (∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp ↔ ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
82	81	raleqbi1dv 3328	. . . . . 6 ⊢ (𝑥 = (𝑢 ∩ 𝐴) → (∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp ↔ ∀𝑦 ∈ (𝑢 ∩ 𝐴)∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢 ∩ 𝐴))((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
83	78, 82	syl5ibrcom 239	. . . . 5 ⊢ (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢 ∈ 𝐽) → (𝑥 = (𝑢 ∩ 𝐴) → ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
84	83	rexlimdva 3213	. . . 4 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (∃𝑢 ∈ 𝐽 𝑥 = (𝑢 ∩ 𝐴) → ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
85	4, 84	sylbid 232	. . 3 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝑥 ∈ (𝐽 ↾t 𝐴) → ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
86	85	ralrimiv 3147	. 2 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → ∀𝑥 ∈ (𝐽 ↾t 𝐴)∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp)
87		isnlly 21681	. 2 ⊢ ((𝐽 ↾t 𝐴) ∈ 𝑛-Locally Comp ↔ ((𝐽 ↾t 𝐴) ∈ Top ∧ ∀𝑥 ∈ (𝐽 ↾t 𝐴)∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘(𝐽 ↾t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽 ↾t 𝐴) ↾t 𝑣) ∈ Comp))
88	3, 86, 87	sylanbrc 578	1 ⊢ ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽 ↾t 𝐴) ∈ 𝑛-Locally Comp)

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 386   ∧ w3a 1071   = wceq 1601   ∈ wcel 2107  ∀wral 3090  ∃wrex 3091   ∩ cin 3791   ⊆ wss 3792  𝒫 cpw 4379  {csn 4398  ∪ cuni 4671  ‘cfv 6135  (class class class)co 6922   ↾_t crest 16467  Topctop 21105  Clsdccld 21228  neicnei 21309  Compccmp 21598  𝑛-Locally cnlly 21677

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2055  ax-8 2109  ax-9 2116  ax-10 2135  ax-11 2150  ax-12 2163  ax-13 2334  ax-ext 2754  ax-rep 5006  ax-sep 5017  ax-nul 5025  ax-pow 5077  ax-pr 5138  ax-un 7226

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3or 1072  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2551  df-eu 2587  df-clab 2764  df-cleq 2770  df-clel 2774  df-nfc 2921  df-ne 2970  df-ral 3095  df-rex 3096  df-reu 3097  df-rab 3099  df-v 3400  df-sbc 3653  df-csb 3752  df-dif 3795  df-un 3797  df-in 3799  df-ss 3806  df-pss 3808  df-nul 4142  df-if 4308  df-pw 4381  df-sn 4399  df-pr 4401  df-tp 4403  df-op 4405  df-uni 4672  df-int 4711  df-iun 4755  df-br 4887  df-opab 4949  df-mpt 4966  df-tr 4988  df-id 5261  df-eprel 5266  df-po 5274  df-so 5275  df-fr 5314  df-we 5316  df-xp 5361  df-rel 5362  df-cnv 5363  df-co 5364  df-dm 5365  df-rn 5366  df-res 5367  df-ima 5368  df-pred 5933  df-ord 5979  df-on 5980  df-lim 5981  df-suc 5982  df-iota 6099  df-fun 6137  df-fn 6138  df-f 6139  df-f1 6140  df-fo 6141  df-f1o 6142  df-fv 6143  df-ov 6925  df-oprab 6926  df-mpt2 6927  df-om 7344  df-1st 7445  df-2nd 7446  df-wrecs 7689  df-recs 7751  df-rdg 7789  df-1o 7843  df-oadd 7847  df-er 8026  df-en 8242  df-dom 8243  df-fin 8245  df-fi 8605  df-rest 16469  df-topgen 16490  df-top 21106  df-topon 21123  df-bases 21158  df-cld 21231  df-nei 21310  df-cmp 21599  df-nlly 21679

This theorem is referenced by:  rellycmp  23164