Theorem hausllycmp 23523

Description: A compact Hausdorff space is locally compact. (Contributed by Mario Carneiro, 2-Mar-2015.)

Assertion

Ref	Expression
hausllycmp	⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → 𝐽 ∈ 𝑛-Locally Comp)

Proof of Theorem hausllycmp

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

Step	Hyp	Ref	Expression
1		haustop 23360	. . 3 ⊢ (𝐽 ∈ Haus → 𝐽 ∈ Top)
2	1	adantr 480	. 2 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → 𝐽 ∈ Top)
3		eqid 2740	. . . . . 6 ⊢ ∪ 𝐽 = ∪ 𝐽
4		eqid 2740	. . . . . 6 ⊢ {𝑧 ∈ 𝐽 ∣ ∃𝑣 ∈ 𝐽 (𝑦 ∈ 𝑣 ∧ ((cls‘𝐽)‘𝑣) ⊆ (∪ 𝐽 ∖ 𝑧))} = {𝑧 ∈ 𝐽 ∣ ∃𝑣 ∈ 𝐽 (𝑦 ∈ 𝑣 ∧ ((cls‘𝐽)‘𝑣) ⊆ (∪ 𝐽 ∖ 𝑧))}
5		simpll 766	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝐽 ∈ Haus)
6		difssd 4160	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (∪ 𝐽 ∖ 𝑥) ⊆ ∪ 𝐽)
7		simplr 768	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝐽 ∈ Comp)
8	1	ad2antrr 725	. . . . . . . 8 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝐽 ∈ Top)
9		simprl 770	. . . . . . . 8 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑥 ∈ 𝐽)
10	3	opncld 23062	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑥 ∈ 𝐽) → (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽))
11	8, 9, 10	syl2anc 583	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽))
12		cmpcld 23431	. . . . . . 7 ⊢ ((𝐽 ∈ Comp ∧ (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽)) → (𝐽 ↾t (∪ 𝐽 ∖ 𝑥)) ∈ Comp)
13	7, 11, 12	syl2anc 583	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (𝐽 ↾t (∪ 𝐽 ∖ 𝑥)) ∈ Comp)
14		simprr 772	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑦 ∈ 𝑥)
15		elssuni 4961	. . . . . . . . 9 ⊢ (𝑥 ∈ 𝐽 → 𝑥 ⊆ ∪ 𝐽)
16	15	ad2antrl 727	. . . . . . . 8 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑥 ⊆ ∪ 𝐽)
17		dfss4 4288	. . . . . . . 8 ⊢ (𝑥 ⊆ ∪ 𝐽 ↔ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)) = 𝑥)
18	16, 17	sylib 218	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)) = 𝑥)
19	14, 18	eleqtrrd 2847	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑦 ∈ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)))
20	3, 4, 5, 6, 13, 19	hauscmplem 23435	. . . . 5 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ∃𝑢 ∈ 𝐽 (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥))))
21	18	sseq2d 4041	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)) ↔ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))
22	21	anbi2d 629	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ((𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥))) ↔ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥)))
23	22	rexbidv 3185	. . . . 5 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (∃𝑢 ∈ 𝐽 (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥))) ↔ ∃𝑢 ∈ 𝐽 (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥)))
24	20, 23	mpbid 232	. . . 4 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ∃𝑢 ∈ 𝐽 (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))
25	8	adantr 480	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝐽 ∈ Top)
26		simprl 770	. . . . . . . 8 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ∈ 𝐽)
27		simprrl 780	. . . . . . . 8 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑦 ∈ 𝑢)
28		opnneip 23148	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ∈ 𝐽 ∧ 𝑦 ∈ 𝑢) → 𝑢 ∈ ((nei‘𝐽)‘{𝑦}))
29	25, 26, 27, 28	syl3anc 1371	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ∈ ((nei‘𝐽)‘{𝑦}))
30		elssuni 4961	. . . . . . . . 9 ⊢ (𝑢 ∈ 𝐽 → 𝑢 ⊆ ∪ 𝐽)
31	30	ad2antrl 727	. . . . . . . 8 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ⊆ ∪ 𝐽)
32	3	sscls 23085	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → 𝑢 ⊆ ((cls‘𝐽)‘𝑢))
33	25, 31, 32	syl2anc 583	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ⊆ ((cls‘𝐽)‘𝑢))
34	3	clsss3 23088	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → ((cls‘𝐽)‘𝑢) ⊆ ∪ 𝐽)
35	25, 31, 34	syl2anc 583	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ⊆ ∪ 𝐽)
36	3	ssnei2 23145	. . . . . . 7 ⊢ (((𝐽 ∈ Top ∧ 𝑢 ∈ ((nei‘𝐽)‘{𝑦})) ∧ (𝑢 ⊆ ((cls‘𝐽)‘𝑢) ∧ ((cls‘𝐽)‘𝑢) ⊆ ∪ 𝐽)) → ((cls‘𝐽)‘𝑢) ∈ ((nei‘𝐽)‘{𝑦}))
37	25, 29, 33, 35, 36	syl22anc 838	. . . . . 6 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ∈ ((nei‘𝐽)‘{𝑦}))
38		simprrr 781	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ⊆ 𝑥)
39		vex 3492	. . . . . . . 8 ⊢ 𝑥 ∈ V
40	39	elpw2 5352	. . . . . . 7 ⊢ (((cls‘𝐽)‘𝑢) ∈ 𝒫 𝑥 ↔ ((cls‘𝐽)‘𝑢) ⊆ 𝑥)
41	38, 40	sylibr 234	. . . . . 6 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ∈ 𝒫 𝑥)
42	37, 41	elind 4223	. . . . 5 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥))
43	7	adantr 480	. . . . . 6 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝐽 ∈ Comp)
44	3	clscld 23076	. . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽))
45	25, 31, 44	syl2anc 583	. . . . . 6 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽))
46		cmpcld 23431	. . . . . 6 ⊢ ((𝐽 ∈ Comp ∧ ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽)) → (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp)
47	43, 45, 46	syl2anc 583	. . . . 5 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp)
48		oveq2 7456	. . . . . . 7 ⊢ (𝑣 = ((cls‘𝐽)‘𝑢) → (𝐽 ↾t 𝑣) = (𝐽 ↾t ((cls‘𝐽)‘𝑢)))
49	48	eleq1d 2829	. . . . . 6 ⊢ (𝑣 = ((cls‘𝐽)‘𝑢) → ((𝐽 ↾t 𝑣) ∈ Comp ↔ (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp))
50	49	rspcev 3635	. . . . 5 ⊢ ((((cls‘𝐽)‘𝑢) ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥) ∧ (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp) → ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
51	42, 47, 50	syl2anc 583	. . . 4 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
52	24, 51	rexlimddv 3167	. . 3 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
53	52	ralrimivva 3208	. 2 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → ∀𝑥 ∈ 𝐽 ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
54		isnlly 23498	. 2 ⊢ (𝐽 ∈ 𝑛-Locally Comp ↔ (𝐽 ∈ Top ∧ ∀𝑥 ∈ 𝐽 ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp))
55	2, 53, 54	sylanbrc 582	1 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → 𝐽 ∈ 𝑛-Locally Comp)

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1537   ∈ wcel 2108  ∀wral 3067  ∃wrex 3076  {crab 3443   ∖ cdif 3973   ∩ cin 3975   ⊆ wss 3976  𝒫 cpw 4622  {csn 4648  ∪ cuni 4931  ‘cfv 6573  (class class class)co 7448   ↾_t crest 17480  Topctop 22920  Clsdccld 23045  clsccl 23047  neicnei 23126  Hauscha 23337  Compccmp 23415  𝑛-Locally cnlly 23494

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-rep 5303  ax-sep 5317  ax-nul 5324  ax-pow 5383  ax-pr 5447  ax-un 7770

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3or 1088  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-reu 3389  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-pss 3996  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-int 4971  df-iun 5017  df-iin 5018  df-br 5167  df-opab 5229  df-mpt 5250  df-tr 5284  df-id 5593  df-eprel 5599  df-po 5607  df-so 5608  df-fr 5652  df-we 5654  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-ord 6398  df-on 6399  df-lim 6400  df-suc 6401  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-fv 6581  df-ov 7451  df-oprab 7452  df-mpo 7453  df-om 7904  df-1st 8030  df-2nd 8031  df-1o 8522  df-2o 8523  df-en 9004  df-dom 9005  df-fin 9007  df-fi 9480  df-rest 17482  df-topgen 17503  df-top 22921  df-topon 22938  df-bases 22974  df-cld 23048  df-cls 23050  df-nei 23127  df-haus 23344  df-cmp 23416  df-nlly 23496

This theorem is referenced by: (None)