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Theorem cldllycmp 21520
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 21511.) (Contributed by Mario Carneiro, 2-Mar-2015.)
Assertion
Ref Expression
cldllycmp ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽t 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.
StepHypRef Expression
1 nllytop 21498 . . 3 (𝐽 ∈ 𝑛-Locally Comp → 𝐽 ∈ Top)
2 resttop 21186 . . 3 ((𝐽 ∈ Top ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽t 𝐴) ∈ Top)
31, 2sylan 489 . 2 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽t 𝐴) ∈ Top)
4 elrest 16310 . . . 4 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝑥 ∈ (𝐽t 𝐴) ↔ ∃𝑢𝐽 𝑥 = (𝑢𝐴)))
5 simpll 807 . . . . . . . . . 10 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → 𝐽 ∈ 𝑛-Locally Comp)
6 simprl 811 . . . . . . . . . 10 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → 𝑢𝐽)
7 inss1 3976 . . . . . . . . . . 11 (𝑢𝐴) ⊆ 𝑢
8 simprr 813 . . . . . . . . . . 11 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → 𝑦 ∈ (𝑢𝐴))
97, 8sseldi 3742 . . . . . . . . . 10 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → 𝑦𝑢)
10 nlly2i 21501 . . . . . . . . . 10 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝑢𝐽𝑦𝑢) → ∃𝑠 ∈ 𝒫 𝑢𝑤𝐽 (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))
115, 6, 9, 10syl3anc 1477 . . . . . . . . 9 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → ∃𝑠 ∈ 𝒫 𝑢𝑤𝐽 (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))
123ad2antrr 764 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝐽t 𝐴) ∈ Top)
131ad3antrrr 768 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝐽 ∈ Top)
14 simpllr 817 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝐴 ∈ (Clsd‘𝐽))
15 simprlr 822 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑤𝐽)
16 elrestr 16311 . . . . . . . . . . . . . . . 16 ((𝐽 ∈ Top ∧ 𝐴 ∈ (Clsd‘𝐽) ∧ 𝑤𝐽) → (𝑤𝐴) ∈ (𝐽t 𝐴))
1713, 14, 15, 16syl3anc 1477 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑤𝐴) ∈ (𝐽t 𝐴))
18 simprr1 1273 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑦𝑤)
19 inss2 3977 . . . . . . . . . . . . . . . . 17 (𝑢𝐴) ⊆ 𝐴
20 simplrr 820 . . . . . . . . . . . . . . . . 17 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑦 ∈ (𝑢𝐴))
2119, 20sseldi 3742 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑦𝐴)
2218, 21elind 3941 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑦 ∈ (𝑤𝐴))
23 opnneip 21145 . . . . . . . . . . . . . . 15 (((𝐽t 𝐴) ∈ Top ∧ (𝑤𝐴) ∈ (𝐽t 𝐴) ∧ 𝑦 ∈ (𝑤𝐴)) → (𝑤𝐴) ∈ ((nei‘(𝐽t 𝐴))‘{𝑦}))
2412, 17, 22, 23syl3anc 1477 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑤𝐴) ∈ ((nei‘(𝐽t 𝐴))‘{𝑦}))
25 simprr2 1275 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑤𝑠)
26 ssrin 3981 . . . . . . . . . . . . . . 15 (𝑤𝑠 → (𝑤𝐴) ⊆ (𝑠𝐴))
2725, 26syl 17 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑤𝐴) ⊆ (𝑠𝐴))
28 inss2 3977 . . . . . . . . . . . . . . 15 (𝑠𝐴) ⊆ 𝐴
29 eqid 2760 . . . . . . . . . . . . . . . . . 18 𝐽 = 𝐽
3029cldss 21055 . . . . . . . . . . . . . . . . 17 (𝐴 ∈ (Clsd‘𝐽) → 𝐴 𝐽)
3114, 30syl 17 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝐴 𝐽)
3229restuni 21188 . . . . . . . . . . . . . . . 16 ((𝐽 ∈ Top ∧ 𝐴 𝐽) → 𝐴 = (𝐽t 𝐴))
3313, 31, 32syl2anc 696 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝐴 = (𝐽t 𝐴))
3428, 33syl5sseq 3794 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ⊆ (𝐽t 𝐴))
35 eqid 2760 . . . . . . . . . . . . . . 15 (𝐽t 𝐴) = (𝐽t 𝐴)
3635ssnei2 21142 . . . . . . . . . . . . . 14 ((((𝐽t 𝐴) ∈ Top ∧ (𝑤𝐴) ∈ ((nei‘(𝐽t 𝐴))‘{𝑦})) ∧ ((𝑤𝐴) ⊆ (𝑠𝐴) ∧ (𝑠𝐴) ⊆ (𝐽t 𝐴))) → (𝑠𝐴) ∈ ((nei‘(𝐽t 𝐴))‘{𝑦}))
3712, 24, 27, 34, 36syl22anc 1478 . . . . . . . . . . . . 13 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ∈ ((nei‘(𝐽t 𝐴))‘{𝑦}))
38 simprll 821 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑠 ∈ 𝒫 𝑢)
3938elpwid 4314 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑠𝑢)
40 ssrin 3981 . . . . . . . . . . . . . . 15 (𝑠𝑢 → (𝑠𝐴) ⊆ (𝑢𝐴))
4139, 40syl 17 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ⊆ (𝑢𝐴))
42 vex 3343 . . . . . . . . . . . . . . . 16 𝑠 ∈ V
4342inex1 4951 . . . . . . . . . . . . . . 15 (𝑠𝐴) ∈ V
4443elpw 4308 . . . . . . . . . . . . . 14 ((𝑠𝐴) ∈ 𝒫 (𝑢𝐴) ↔ (𝑠𝐴) ⊆ (𝑢𝐴))
4541, 44sylibr 224 . . . . . . . . . . . . 13 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ∈ 𝒫 (𝑢𝐴))
4637, 45elind 3941 . . . . . . . . . . . 12 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴)))
4728a1i 11 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ⊆ 𝐴)
48 restabs 21191 . . . . . . . . . . . . . . 15 ((𝐽 ∈ Top ∧ (𝑠𝐴) ⊆ 𝐴𝐴 ∈ (Clsd‘𝐽)) → ((𝐽t 𝐴) ↾t (𝑠𝐴)) = (𝐽t (𝑠𝐴)))
4913, 47, 14, 48syl3anc 1477 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐽t 𝐴) ↾t (𝑠𝐴)) = (𝐽t (𝑠𝐴)))
50 inss1 3976 . . . . . . . . . . . . . . . 16 (𝑠𝐴) ⊆ 𝑠
5150a1i 11 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ⊆ 𝑠)
52 restabs 21191 . . . . . . . . . . . . . . 15 ((𝐽 ∈ Top ∧ (𝑠𝐴) ⊆ 𝑠𝑠 ∈ 𝒫 𝑢) → ((𝐽t 𝑠) ↾t (𝑠𝐴)) = (𝐽t (𝑠𝐴)))
5313, 51, 38, 52syl3anc 1477 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐽t 𝑠) ↾t (𝑠𝐴)) = (𝐽t (𝑠𝐴)))
5449, 53eqtr4d 2797 . . . . . . . . . . . . 13 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐽t 𝐴) ↾t (𝑠𝐴)) = ((𝐽t 𝑠) ↾t (𝑠𝐴)))
55 simprr3 1277 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝐽t 𝑠) ∈ Comp)
56 incom 3948 . . . . . . . . . . . . . . 15 (𝑠𝐴) = (𝐴𝑠)
57 eqid 2760 . . . . . . . . . . . . . . . . 17 (𝐴𝑠) = (𝐴𝑠)
58 ineq1 3950 . . . . . . . . . . . . . . . . . . 19 (𝑣 = 𝐴 → (𝑣𝑠) = (𝐴𝑠))
5958eqeq2d 2770 . . . . . . . . . . . . . . . . . 18 (𝑣 = 𝐴 → ((𝐴𝑠) = (𝑣𝑠) ↔ (𝐴𝑠) = (𝐴𝑠)))
6059rspcev 3449 . . . . . . . . . . . . . . . . 17 ((𝐴 ∈ (Clsd‘𝐽) ∧ (𝐴𝑠) = (𝐴𝑠)) → ∃𝑣 ∈ (Clsd‘𝐽)(𝐴𝑠) = (𝑣𝑠))
6114, 57, 60sylancl 697 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ∃𝑣 ∈ (Clsd‘𝐽)(𝐴𝑠) = (𝑣𝑠))
62 simplrl 819 . . . . . . . . . . . . . . . . . . 19 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑢𝐽)
63 elssuni 4619 . . . . . . . . . . . . . . . . . . 19 (𝑢𝐽𝑢 𝐽)
6462, 63syl 17 . . . . . . . . . . . . . . . . . 18 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑢 𝐽)
6539, 64sstrd 3754 . . . . . . . . . . . . . . . . 17 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → 𝑠 𝐽)
6629restcld 21198 . . . . . . . . . . . . . . . . 17 ((𝐽 ∈ Top ∧ 𝑠 𝐽) → ((𝐴𝑠) ∈ (Clsd‘(𝐽t 𝑠)) ↔ ∃𝑣 ∈ (Clsd‘𝐽)(𝐴𝑠) = (𝑣𝑠)))
6713, 65, 66syl2anc 696 . . . . . . . . . . . . . . . 16 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐴𝑠) ∈ (Clsd‘(𝐽t 𝑠)) ↔ ∃𝑣 ∈ (Clsd‘𝐽)(𝐴𝑠) = (𝑣𝑠)))
6861, 67mpbird 247 . . . . . . . . . . . . . . 15 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝐴𝑠) ∈ (Clsd‘(𝐽t 𝑠)))
6956, 68syl5eqel 2843 . . . . . . . . . . . . . 14 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → (𝑠𝐴) ∈ (Clsd‘(𝐽t 𝑠)))
70 cmpcld 21427 . . . . . . . . . . . . . 14 (((𝐽t 𝑠) ∈ Comp ∧ (𝑠𝐴) ∈ (Clsd‘(𝐽t 𝑠))) → ((𝐽t 𝑠) ↾t (𝑠𝐴)) ∈ Comp)
7155, 69, 70syl2anc 696 . . . . . . . . . . . . 13 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐽t 𝑠) ↾t (𝑠𝐴)) ∈ Comp)
7254, 71eqeltrd 2839 . . . . . . . . . . . 12 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ((𝐽t 𝐴) ↾t (𝑠𝐴)) ∈ Comp)
73 oveq2 6822 . . . . . . . . . . . . . 14 (𝑣 = (𝑠𝐴) → ((𝐽t 𝐴) ↾t 𝑣) = ((𝐽t 𝐴) ↾t (𝑠𝐴)))
7473eleq1d 2824 . . . . . . . . . . . . 13 (𝑣 = (𝑠𝐴) → (((𝐽t 𝐴) ↾t 𝑣) ∈ Comp ↔ ((𝐽t 𝐴) ↾t (𝑠𝐴)) ∈ Comp))
7574rspcev 3449 . . . . . . . . . . . 12 (((𝑠𝐴) ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴)) ∧ ((𝐽t 𝐴) ↾t (𝑠𝐴)) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
7646, 72, 75syl2anc 696 . . . . . . . . . . 11 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ ((𝑠 ∈ 𝒫 𝑢𝑤𝐽) ∧ (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp))) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
7776expr 644 . . . . . . . . . 10 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) ∧ (𝑠 ∈ 𝒫 𝑢𝑤𝐽)) → ((𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
7877rexlimdvva 3176 . . . . . . . . 9 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → (∃𝑠 ∈ 𝒫 𝑢𝑤𝐽 (𝑦𝑤𝑤𝑠 ∧ (𝐽t 𝑠) ∈ Comp) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
7911, 78mpd 15 . . . . . . . 8 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ (𝑢𝐽𝑦 ∈ (𝑢𝐴))) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
8079anassrs 683 . . . . . . 7 ((((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢𝐽) ∧ 𝑦 ∈ (𝑢𝐴)) → ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
8180ralrimiva 3104 . . . . . 6 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢𝐽) → ∀𝑦 ∈ (𝑢𝐴)∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
82 pweq 4305 . . . . . . . . 9 (𝑥 = (𝑢𝐴) → 𝒫 𝑥 = 𝒫 (𝑢𝐴))
8382ineq2d 3957 . . . . . . . 8 (𝑥 = (𝑢𝐴) → (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥) = (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴)))
8483rexeqdv 3284 . . . . . . 7 (𝑥 = (𝑢𝐴) → (∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp ↔ ∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
8584raleqbi1dv 3285 . . . . . 6 (𝑥 = (𝑢𝐴) → (∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp ↔ ∀𝑦 ∈ (𝑢𝐴)∃𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 (𝑢𝐴))((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
8681, 85syl5ibrcom 237 . . . . 5 (((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) ∧ 𝑢𝐽) → (𝑥 = (𝑢𝐴) → ∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
8786rexlimdva 3169 . . . 4 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (∃𝑢𝐽 𝑥 = (𝑢𝐴) → ∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
884, 87sylbid 230 . . 3 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝑥 ∈ (𝐽t 𝐴) → ∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
8988ralrimiv 3103 . 2 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → ∀𝑥 ∈ (𝐽t 𝐴)∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp)
90 isnlly 21494 . 2 ((𝐽t 𝐴) ∈ 𝑛-Locally Comp ↔ ((𝐽t 𝐴) ∈ Top ∧ ∀𝑥 ∈ (𝐽t 𝐴)∀𝑦𝑥𝑣 ∈ (((nei‘(𝐽t 𝐴))‘{𝑦}) ∩ 𝒫 𝑥)((𝐽t 𝐴) ↾t 𝑣) ∈ Comp))
913, 89, 90sylanbrc 701 1 ((𝐽 ∈ 𝑛-Locally Comp ∧ 𝐴 ∈ (Clsd‘𝐽)) → (𝐽t 𝐴) ∈ 𝑛-Locally Comp)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  w3a 1072   = wceq 1632  wcel 2139  wral 3050  wrex 3051  cin 3714  wss 3715  𝒫 cpw 4302  {csn 4321   cuni 4588  cfv 6049  (class class class)co 6814  t crest 16303  Topctop 20920  Clsdccld 21042  neicnei 21123  Compccmp 21411  𝑛-Locally cnlly 21490
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-rep 4923  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7115
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-reu 3057  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-pss 3731  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-tp 4326  df-op 4328  df-uni 4589  df-int 4628  df-iun 4674  df-br 4805  df-opab 4865  df-mpt 4882  df-tr 4905  df-id 5174  df-eprel 5179  df-po 5187  df-so 5188  df-fr 5225  df-we 5227  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-pred 5841  df-ord 5887  df-on 5888  df-lim 5889  df-suc 5890  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-f1 6054  df-fo 6055  df-f1o 6056  df-fv 6057  df-ov 6817  df-oprab 6818  df-mpt2 6819  df-om 7232  df-1st 7334  df-2nd 7335  df-wrecs 7577  df-recs 7638  df-rdg 7676  df-1o 7730  df-oadd 7734  df-er 7913  df-en 8124  df-dom 8125  df-fin 8127  df-fi 8484  df-rest 16305  df-topgen 16326  df-top 20921  df-topon 20938  df-bases 20972  df-cld 21045  df-nei 21124  df-cmp 21412  df-nlly 21492
This theorem is referenced by:  rellycmp  22977
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