Theorem hausllycmp 23432

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 23269	. . 3 ⊢ (𝐽 ∈ Haus → 𝐽 ∈ Top)
2	1	adantr 480	. 2 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → 𝐽 ∈ Top)
3		eqid 2735	. . . . . 6 ⊢ ∪ 𝐽 = ∪ 𝐽
4		eqid 2735	. . . . . 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 4112	. . . . . 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 726	. . . . . . . 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 22971	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑥 ∈ 𝐽) → (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽))
11	8, 9, 10	syl2anc 584	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽))
12		cmpcld 23340	. . . . . . 7 ⊢ ((𝐽 ∈ Comp ∧ (∪ 𝐽 ∖ 𝑥) ∈ (Clsd‘𝐽)) → (𝐽 ↾t (∪ 𝐽 ∖ 𝑥)) ∈ Comp)
13	7, 11, 12	syl2anc 584	. . . . . 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 4913	. . . . . . . . 9 ⊢ (𝑥 ∈ 𝐽 → 𝑥 ⊆ ∪ 𝐽)
16	15	ad2antrl 728	. . . . . . . 8 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑥 ⊆ ∪ 𝐽)
17		dfss4 4244	. . . . . . . 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 2837	. . . . . 6 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → 𝑦 ∈ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)))
20	3, 4, 5, 6, 13, 19	hauscmplem 23344	. . . . 5 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ∃𝑢 ∈ 𝐽 (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥))))
21	18	sseq2d 3991	. . . . . . 7 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → (((cls‘𝐽)‘𝑢) ⊆ (∪ 𝐽 ∖ (∪ 𝐽 ∖ 𝑥)) ↔ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))
22	21	anbi2d 630	. . . . . 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 3164	. . . . 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 23057	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ∈ 𝐽 ∧ 𝑦 ∈ 𝑢) → 𝑢 ∈ ((nei‘𝐽)‘{𝑦}))
29	25, 26, 27, 28	syl3anc 1373	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ∈ ((nei‘𝐽)‘{𝑦}))
30		elssuni 4913	. . . . . . . . 9 ⊢ (𝑢 ∈ 𝐽 → 𝑢 ⊆ ∪ 𝐽)
31	30	ad2antrl 728	. . . . . . . 8 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ⊆ ∪ 𝐽)
32	3	sscls 22994	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → 𝑢 ⊆ ((cls‘𝐽)‘𝑢))
33	25, 31, 32	syl2anc 584	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → 𝑢 ⊆ ((cls‘𝐽)‘𝑢))
34	3	clsss3 22997	. . . . . . . 8 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → ((cls‘𝐽)‘𝑢) ⊆ ∪ 𝐽)
35	25, 31, 34	syl2anc 584	. . . . . . 7 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ⊆ ∪ 𝐽)
36	3	ssnei2 23054	. . . . . . 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 3463	. . . . . . . 8 ⊢ 𝑥 ∈ V
40	39	elpw2 5304	. . . . . . 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 4175	. . . . 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 22985	. . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝑢 ⊆ ∪ 𝐽) → ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽))
45	25, 31, 44	syl2anc 584	. . . . . 6 ⊢ ((((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) ∧ (𝑢 ∈ 𝐽 ∧ (𝑦 ∈ 𝑢 ∧ ((cls‘𝐽)‘𝑢) ⊆ 𝑥))) → ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽))
46		cmpcld 23340	. . . . . 6 ⊢ ((𝐽 ∈ Comp ∧ ((cls‘𝐽)‘𝑢) ∈ (Clsd‘𝐽)) → (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp)
47	43, 45, 46	syl2anc 584	. . . . 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 7413	. . . . . . 7 ⊢ (𝑣 = ((cls‘𝐽)‘𝑢) → (𝐽 ↾t 𝑣) = (𝐽 ↾t ((cls‘𝐽)‘𝑢)))
49	48	eleq1d 2819	. . . . . 6 ⊢ (𝑣 = ((cls‘𝐽)‘𝑢) → ((𝐽 ↾t 𝑣) ∈ Comp ↔ (𝐽 ↾t ((cls‘𝐽)‘𝑢)) ∈ Comp))
50	49	rspcev 3601	. . . . 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 584	. . . 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 3147	. . 3 ⊢ (((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝑥)) → ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
53	52	ralrimivva 3187	. 2 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → ∀𝑥 ∈ 𝐽 ∀𝑦 ∈ 𝑥 ∃𝑣 ∈ (((nei‘𝐽)‘{𝑦}) ∩ 𝒫 𝑥)(𝐽 ↾t 𝑣) ∈ Comp)
54		isnlly 23407	. 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 583	1 ⊢ ((𝐽 ∈ Haus ∧ 𝐽 ∈ Comp) → 𝐽 ∈ 𝑛-Locally Comp)

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1540   ∈ wcel 2108  ∀wral 3051  ∃wrex 3060  {crab 3415   ∖ cdif 3923   ∩ cin 3925   ⊆ wss 3926  𝒫 cpw 4575  {csn 4601  ∪ cuni 4883  ‘cfv 6531  (class class class)co 7405   ↾_t crest 17434  Topctop 22831  Clsdccld 22954  clsccl 22956  neicnei 23035  Hauscha 23246  Compccmp 23324  𝑛-Locally cnlly 23403

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-rep 5249  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-int 4923  df-iun 4969  df-iin 4970  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-1o 8480  df-2o 8481  df-en 8960  df-dom 8961  df-fin 8963  df-fi 9423  df-rest 17436  df-topgen 17457  df-top 22832  df-topon 22849  df-bases 22884  df-cld 22957  df-cls 22959  df-nei 23036  df-haus 23253  df-cmp 23325  df-nlly 23405

This theorem is referenced by: (None)