Theorem lly1stc 23870

Description: First-countability is a local property (unlike second-countability). (Contributed by Mario Carneiro, 21-Mar-2015.)

Assertion

Ref	Expression
lly1stc	⊢ Locally 1stω = 1stω

Proof of Theorem lly1stc

Dummy variables 𝑗 𝑎 𝑛 𝑡 𝑢 𝑣 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		llytop 23846	. . . 4 ⊢ (𝑗 ∈ Locally 1stω → 𝑗 ∈ Top)
2		simprr 785	. . . . . . . . 9 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → (𝑗 ↾t 𝑢) ∈ 1stω)
3		simprl 783	. . . . . . . . . 10 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → 𝑥 ∈ 𝑢)
4	1	ad3antrrr 743	. . . . . . . . . . 11 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → 𝑗 ∈ Top)
5		elssuni 4904	. . . . . . . . . . . 12 ⊢ (𝑢 ∈ 𝑗 → 𝑢 ⊆ ∪ 𝑗)
6	5	ad2antlr 740	. . . . . . . . . . 11 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → 𝑢 ⊆ ∪ 𝑗)
7		eqid 2763	. . . . . . . . . . . 12 ⊢ ∪ 𝑗 = ∪ 𝑗
8	7	restuni 23535	. . . . . . . . . . 11 ⊢ ((𝑗 ∈ Top ∧ 𝑢 ⊆ ∪ 𝑗) → 𝑢 = ∪ (𝑗 ↾t 𝑢))
9	4, 6, 8	syl2anc 596	. . . . . . . . . 10 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → 𝑢 = ∪ (𝑗 ↾t 𝑢))
10	3, 9	eleqtrd 2866	. . . . . . . . 9 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → 𝑥 ∈ ∪ (𝑗 ↾t 𝑢))
11		eqid 2763	. . . . . . . . . 10 ⊢ ∪ (𝑗 ↾t 𝑢) = ∪ (𝑗 ↾t 𝑢)
12	11	1stcclb 23817	. . . . . . . . 9 ⊢ (((𝑗 ↾t 𝑢) ∈ 1stω ∧ 𝑥 ∈ ∪ (𝑗 ↾t 𝑢)) → ∃𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)(𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))
13	2, 10, 12	syl2anc 596	. . . . . . . 8 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → ∃𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)(𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))
14		elpwi 4567	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) → 𝑡 ⊆ (𝑗 ↾t 𝑢))
15	14	adantl 487	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → 𝑡 ⊆ (𝑗 ↾t 𝑢))
16	15	sselda 3913	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → 𝑛 ∈ (𝑗 ↾t 𝑢))
17	4	adantr 486	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → 𝑗 ∈ Top)
18		simpllr 788	. . . . . . . . . . . . . . . . . 18 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → 𝑢 ∈ 𝑗)
19		restopn2 23550	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑗 ∈ Top ∧ 𝑢 ∈ 𝑗) → (𝑛 ∈ (𝑗 ↾t 𝑢) ↔ (𝑛 ∈ 𝑗 ∧ 𝑛 ⊆ 𝑢)))
20	17, 18, 19	syl2anc 596	. . . . . . . . . . . . . . . . 17 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → (𝑛 ∈ (𝑗 ↾t 𝑢) ↔ (𝑛 ∈ 𝑗 ∧ 𝑛 ⊆ 𝑢)))
21	20	simplbda 505	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ (𝑗 ↾t 𝑢)) → 𝑛 ⊆ 𝑢)
22	16, 21	syldan 603	. . . . . . . . . . . . . . 15 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → 𝑛 ⊆ 𝑢)
23		dfss2 4097	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ⊆ 𝑢 ↔ (𝑛 ∩ 𝑢) = 𝑛)
24	22, 23	sylib 221	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑛 ∩ 𝑢) = 𝑛)
25	20	simprbda 504	. . . . . . . . . . . . . . 15 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ (𝑗 ↾t 𝑢)) → 𝑛 ∈ 𝑗)
26	16, 25	syldan 603	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → 𝑛 ∈ 𝑗)
27	24, 26	eqeltrd 2864	. . . . . . . . . . . . 13 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑛 ∩ 𝑢) ∈ 𝑗)
28		ineq1 4113	. . . . . . . . . . . . . 14 ⊢ (𝑎 = 𝑛 → (𝑎 ∩ 𝑢) = (𝑛 ∩ 𝑢))
29	28	cbvmptv 5215	. . . . . . . . . . . . 13 ⊢ (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) = (𝑛 ∈ 𝑡 ↦ (𝑛 ∩ 𝑢))
30	27, 29	fmptd 7146	. . . . . . . . . . . 12 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)):𝑡⟶𝑗)
31	30	frnd 6748	. . . . . . . . . . 11 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ⊆ 𝑗)
32	31	adantrr 730	. . . . . . . . . 10 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ⊆ 𝑗)
33		vex 3458	. . . . . . . . . . 11 ⊢ 𝑗 ∈ V
34	33	elpw2 5303	. . . . . . . . . 10 ⊢ (ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ∈ 𝒫 𝑗 ↔ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ⊆ 𝑗)
35	32, 34	sylibr 237	. . . . . . . . 9 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ∈ 𝒫 𝑗)
36		simprrl 793	. . . . . . . . . 10 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → 𝑡 ≼ ω)
37		1stcrestlem 23825	. . . . . . . . . 10 ⊢ (𝑡 ≼ ω → ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ≼ ω)
38	36, 37	syl 18	. . . . . . . . 9 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ≼ ω)
39		simprr 785	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑥 ∈ 𝑧)
40	3	ad2antrr 739	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑥 ∈ 𝑢)
41	39, 40	elind 4100	. . . . . . . . . . . . 13 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑥 ∈ (𝑧 ∩ 𝑢))
42		eleq2 2853	. . . . . . . . . . . . . . 15 ⊢ (𝑣 = (𝑧 ∩ 𝑢) → (𝑥 ∈ 𝑣 ↔ 𝑥 ∈ (𝑧 ∩ 𝑢)))
43		sseq2 3939	. . . . . . . . . . . . . . . . 17 ⊢ (𝑣 = (𝑧 ∩ 𝑢) → (𝑛 ⊆ 𝑣 ↔ 𝑛 ⊆ (𝑧 ∩ 𝑢)))
44	43	anbi2d 642	. . . . . . . . . . . . . . . 16 ⊢ (𝑣 = (𝑧 ∩ 𝑢) → ((𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣) ↔ (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢))))
45	44	rexbidv 3190	. . . . . . . . . . . . . . 15 ⊢ (𝑣 = (𝑧 ∩ 𝑢) → (∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣) ↔ ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢))))
46	42, 45	imbi12d 347	. . . . . . . . . . . . . 14 ⊢ (𝑣 = (𝑧 ∩ 𝑢) → ((𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣)) ↔ (𝑥 ∈ (𝑧 ∩ 𝑢) → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)))))
47		simprrr 794	. . . . . . . . . . . . . . 15 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣)))
48	47	adantr 486	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣)))
49	4	ad2antrr 739	. . . . . . . . . . . . . . 15 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑗 ∈ Top)
50		simpllr 788	. . . . . . . . . . . . . . . 16 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → 𝑢 ∈ 𝑗)
51	50	adantr 486	. . . . . . . . . . . . . . 15 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑢 ∈ 𝑗)
52		simprl 783	. . . . . . . . . . . . . . 15 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → 𝑧 ∈ 𝑗)
53		elrestr 17649	. . . . . . . . . . . . . . 15 ⊢ ((𝑗 ∈ Top ∧ 𝑢 ∈ 𝑗 ∧ 𝑧 ∈ 𝑗) → (𝑧 ∩ 𝑢) ∈ (𝑗 ↾t 𝑢))
54	49, 51, 52, 53	syl3anc 1399	. . . . . . . . . . . . . 14 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → (𝑧 ∩ 𝑢) ∈ (𝑗 ↾t 𝑢))
55	46, 48, 54	rspcdva 3581	. . . . . . . . . . . . 13 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → (𝑥 ∈ (𝑧 ∩ 𝑢) → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢))))
56	41, 55	mpd 16	. . . . . . . . . . . 12 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)))
57	3	ad2antrr 739	. . . . . . . . . . . . . . . . . 18 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → 𝑥 ∈ 𝑢)
58		elin 4096	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ∈ (𝑛 ∩ 𝑢) ↔ (𝑥 ∈ 𝑛 ∧ 𝑥 ∈ 𝑢))
59	58	simplbi2com 508	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ 𝑢 → (𝑥 ∈ 𝑛 → 𝑥 ∈ (𝑛 ∩ 𝑢)))
60	57, 59	syl 18	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑥 ∈ 𝑛 → 𝑥 ∈ (𝑛 ∩ 𝑢)))
61	22	biantrud 541	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑛 ⊆ 𝑧 ↔ (𝑛 ⊆ 𝑧 ∧ 𝑛 ⊆ 𝑢)))
62		ssin 4138	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑛 ⊆ 𝑧 ∧ 𝑛 ⊆ 𝑢) ↔ 𝑛 ⊆ (𝑧 ∩ 𝑢))
63	61, 62	bitrdi 290	. . . . . . . . . . . . . . . . . 18 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑛 ⊆ 𝑧 ↔ 𝑛 ⊆ (𝑧 ∩ 𝑢)))
64		ssinss1 4145	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑛 ⊆ 𝑧 → (𝑛 ∩ 𝑢) ⊆ 𝑧)
65	63, 64	biimtrrdi 257	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → (𝑛 ⊆ (𝑧 ∩ 𝑢) → (𝑛 ∩ 𝑢) ⊆ 𝑧))
66	60, 65	anim12d 621	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) ∧ 𝑛 ∈ 𝑡) → ((𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)) → (𝑥 ∈ (𝑛 ∩ 𝑢) ∧ (𝑛 ∩ 𝑢) ⊆ 𝑧)))
67	66	reximdva 3179	. . . . . . . . . . . . . . 15 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → (∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)) → ∃𝑛 ∈ 𝑡 (𝑥 ∈ (𝑛 ∩ 𝑢) ∧ (𝑛 ∩ 𝑢) ⊆ 𝑧)))
68		vex 3458	. . . . . . . . . . . . . . . . . 18 ⊢ 𝑛 ∈ V
69	68	inex1 5284	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 ∩ 𝑢) ∈ V
70	69	rgenw 3084	. . . . . . . . . . . . . . . 16 ⊢ ∀𝑛 ∈ 𝑡 (𝑛 ∩ 𝑢) ∈ V
71		eleq2 2853	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑤 = (𝑛 ∩ 𝑢) → (𝑥 ∈ 𝑤 ↔ 𝑥 ∈ (𝑛 ∩ 𝑢)))
72		sseq1 3938	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑤 = (𝑛 ∩ 𝑢) → (𝑤 ⊆ 𝑧 ↔ (𝑛 ∩ 𝑢) ⊆ 𝑧))
73	71, 72	anbi12d 644	. . . . . . . . . . . . . . . . 17 ⊢ (𝑤 = (𝑛 ∩ 𝑢) → ((𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧) ↔ (𝑥 ∈ (𝑛 ∩ 𝑢) ∧ (𝑛 ∩ 𝑢) ⊆ 𝑧)))
74	29, 73	rexrnmptw 7127	. . . . . . . . . . . . . . . 16 ⊢ (∀𝑛 ∈ 𝑡 (𝑛 ∩ 𝑢) ∈ V → (∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧) ↔ ∃𝑛 ∈ 𝑡 (𝑥 ∈ (𝑛 ∩ 𝑢) ∧ (𝑛 ∩ 𝑢) ⊆ 𝑧)))
75	70, 74	ax-mp 5	. . . . . . . . . . . . . . 15 ⊢ (∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧) ↔ ∃𝑛 ∈ 𝑡 (𝑥 ∈ (𝑛 ∩ 𝑢) ∧ (𝑛 ∩ 𝑢) ⊆ 𝑧))
76	67, 75	imbitrrdi 255	. . . . . . . . . . . . . 14 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ 𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢)) → (∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)) → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
77	76	adantrr 730	. . . . . . . . . . . . 13 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → (∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)) → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
78	77	adantr 486	. . . . . . . . . . . 12 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → (∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ (𝑧 ∩ 𝑢)) → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
79	56, 78	mpd 16	. . . . . . . . . . 11 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ (𝑧 ∈ 𝑗 ∧ 𝑥 ∈ 𝑧)) → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))
80	79	expr 462	. . . . . . . . . 10 ⊢ ((((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) ∧ 𝑧 ∈ 𝑗) → (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
81	80	ralrimiva 3158	. . . . . . . . 9 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
82		breq1 5111	. . . . . . . . . . 11 ⊢ (𝑦 = ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) → (𝑦 ≼ ω ↔ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ≼ ω))
83		rexeq 3319	. . . . . . . . . . . . 13 ⊢ (𝑦 = ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) → (∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧) ↔ ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))
84	83	imbi2d 343	. . . . . . . . . . . 12 ⊢ (𝑦 = ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) → ((𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)) ↔ (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
85	84	ralbidv 3189	. . . . . . . . . . 11 ⊢ (𝑦 = ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) → (∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)) ↔ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
86	82, 85	anbi12d 644	. . . . . . . . . 10 ⊢ (𝑦 = ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) → ((𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))) ↔ (ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))))
87	86	rspcev 3580	. . . . . . . . 9 ⊢ ((ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ∈ 𝒫 𝑗 ∧ (ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢)) ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ ran (𝑎 ∈ 𝑡 ↦ (𝑎 ∩ 𝑢))(𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))) → ∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
88	35, 38, 81, 87	syl12anc 850	. . . . . . . 8 ⊢ (((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) ∧ (𝑡 ∈ 𝒫 (𝑗 ↾t 𝑢) ∧ (𝑡 ≼ ω ∧ ∀𝑣 ∈ (𝑗 ↾t 𝑢)(𝑥 ∈ 𝑣 → ∃𝑛 ∈ 𝑡 (𝑥 ∈ 𝑛 ∧ 𝑛 ⊆ 𝑣))))) → ∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
89	13, 88	rexlimddv 3173	. . . . . . 7 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → ∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
90	89	3adantr1 1188	. . . . . 6 ⊢ ((((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) ∧ 𝑢 ∈ 𝑗) ∧ (𝑢 ⊆ ∪ 𝑗 ∧ 𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω)) → ∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
91		simpl 488	. . . . . . 7 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → 𝑗 ∈ Locally 1stω)
92	1	adantr 486	. . . . . . . 8 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → 𝑗 ∈ Top)
93	7	topopn 23279	. . . . . . . 8 ⊢ (𝑗 ∈ Top → ∪ 𝑗 ∈ 𝑗)
94	92, 93	syl 18	. . . . . . 7 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → ∪ 𝑗 ∈ 𝑗)
95		simpr 490	. . . . . . 7 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → 𝑥 ∈ ∪ 𝑗)
96		llyi 23848	. . . . . . 7 ⊢ ((𝑗 ∈ Locally 1stω ∧ ∪ 𝑗 ∈ 𝑗 ∧ 𝑥 ∈ ∪ 𝑗) → ∃𝑢 ∈ 𝑗 (𝑢 ⊆ ∪ 𝑗 ∧ 𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω))
97	91, 94, 95, 96	syl3anc 1399	. . . . . 6 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → ∃𝑢 ∈ 𝑗 (𝑢 ⊆ ∪ 𝑗 ∧ 𝑥 ∈ 𝑢 ∧ (𝑗 ↾t 𝑢) ∈ 1stω))
98	90, 97	r19.29a 3174	. . . . 5 ⊢ ((𝑗 ∈ Locally 1stω ∧ 𝑥 ∈ ∪ 𝑗) → ∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
99	98	ralrimiva 3158	. . . 4 ⊢ (𝑗 ∈ Locally 1stω → ∀𝑥 ∈ ∪ 𝑗∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧))))
100	7	is1stc2 23815	. . . 4 ⊢ (𝑗 ∈ 1stω ↔ (𝑗 ∈ Top ∧ ∀𝑥 ∈ ∪ 𝑗∃𝑦 ∈ 𝒫 𝑗(𝑦 ≼ ω ∧ ∀𝑧 ∈ 𝑗 (𝑥 ∈ 𝑧 → ∃𝑤 ∈ 𝑦 (𝑥 ∈ 𝑤 ∧ 𝑤 ⊆ 𝑧)))))
101	1, 99, 100	sylanbrc 595	. . 3 ⊢ (𝑗 ∈ Locally 1stω → 𝑗 ∈ 1stω)
102	101	ssriv 3917	. 2 ⊢ Locally 1stω ⊆ 1stω
103		1stcrest 23826	. . . . 5 ⊢ ((𝑗 ∈ 1stω ∧ 𝑥 ∈ 𝑗) → (𝑗 ↾t 𝑥) ∈ 1stω)
104	103	adantl 487	. . . 4 ⊢ ((⊤ ∧ (𝑗 ∈ 1stω ∧ 𝑥 ∈ 𝑗)) → (𝑗 ↾t 𝑥) ∈ 1stω)
105		1stctop 23816	. . . . . 6 ⊢ (𝑗 ∈ 1stω → 𝑗 ∈ Top)
106	105	ssriv 3917	. . . . 5 ⊢ 1stω ⊆ Top
107	106	a1i 11	. . . 4 ⊢ (⊤ → 1stω ⊆ Top)
108	104, 107	restlly 23857	. . 3 ⊢ (⊤ → 1stω ⊆ Locally 1stω)
109	108	mptru 1577	. 2 ⊢ 1stω ⊆ Locally 1stω
110	102, 109	eqssi 3929	1 ⊢ Locally 1stω = 1stω

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∧ w3a 1103   = wceq 1570  ⊤wtru 1571   ∈ wcel 2147  ∀wral 3080  ∃wrex 3090  Vcvv 3454   ⊆ wss 3900   ∩ cin 4092  𝒫 cpw 4560  ∪ cuni 4872   class class class wbr 5108   ↦ cmpt 5192  ran crn 5659  (class class class)co 7451  ωcom 7911   ≼ cdom 9009   ↾_t crest 17641  Topctop 23266  1^stωc1stc 23810  Locally clly 23838

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-rep 5238  ax-sep 5255  ax-nul 5266  ax-pow 5334  ax-pr 5398  ax-un 7783

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-pss 4017  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-int 4913  df-iun 4958  df-br 5109  df-opab 5174  df-mpt 5193  df-tr 5219  df-id 5553  df-eprel 5558  df-po 5566  df-so 5567  df-fr 5611  df-se 5612  df-we 5613  df-xp 5664  df-rel 5665  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-res 5670  df-ima 5671  df-pred 6330  df-ord 6391  df-on 6392  df-lim 6393  df-suc 6394  df-iota 6520  df-fun 6568  df-fn 6569  df-f 6570  df-f1 6571  df-fo 6572  df-f1o 6573  df-fv 6574  df-isom 6575  df-riota 7408  df-ov 7454  df-oprab 7455  df-mpo 7456  df-om 7912  df-1st 8035  df-2nd 8036  df-frecs 8337  df-wrecs 8368  df-recs 8417  df-er 8755  df-map 8887  df-en 9012  df-dom 9013  df-fin 9015  df-fi 9440  df-card 10057  df-acn 10060  df-rest 17643  df-topgen 17664  df-top 23267  df-topon 23284  df-bases 23319  df-1stc 23812  df-lly 23840

This theorem is used by:  dis1stc  23873