Theorem neik0pk1imk0 38345

Description: Kuratowski's K0' and K1 axioms imply K0. Neighborhood version. (Contributed by RP, 3-Jun-2021.)

Hypotheses

Ref	Expression
neik0pk1imk0.bex	⊢ (𝜑 → 𝐵 ∈ 𝑉)
neik0pk1imk0.n	⊢ (𝜑 → 𝑁 ∈ (𝒫 𝒫 𝐵 ↑𝑚 𝐵))
neik0pk1imk0.k0p	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 (𝑁‘𝑥) ≠ ∅)
neik0pk1imk0.k1	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)))

Assertion

Ref	Expression
neik0pk1imk0	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 𝐵 ∈ (𝑁‘𝑥))

Distinct variable groups:   𝐵,𝑠,𝑡   𝑁,𝑠,𝑡   𝜑,𝑠,𝑥   𝑥,𝑡

Allowed substitution hints:   𝜑(𝑡)   𝐵(𝑥)   𝑁(𝑥)   𝑉(𝑥,𝑡,𝑠)

Proof of Theorem neik0pk1imk0

Step	Hyp	Ref	Expression
1		neik0pk1imk0.k1	. . . 4 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)))
2		neik0pk1imk0.bex	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ 𝑉)
3		pwidg 4173	. . . . . . . 8 ⊢ (𝐵 ∈ 𝑉 → 𝐵 ∈ 𝒫 𝐵)
4	2, 3	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ 𝒫 𝐵)
5		sseq2 3627	. . . . . . . . . 10 ⊢ (𝑡 = 𝐵 → (𝑠 ⊆ 𝑡 ↔ 𝑠 ⊆ 𝐵))
6	5	anbi2d 740	. . . . . . . . 9 ⊢ (𝑡 = 𝐵 → ((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) ↔ (𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵)))
7		eleq1 2689	. . . . . . . . 9 ⊢ (𝑡 = 𝐵 → (𝑡 ∈ (𝑁‘𝑥) ↔ 𝐵 ∈ (𝑁‘𝑥)))
8	6, 7	imbi12d 334	. . . . . . . 8 ⊢ (𝑡 = 𝐵 → (((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)) ↔ ((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
9	8	rspcv 3305	. . . . . . 7 ⊢ (𝐵 ∈ 𝒫 𝐵 → (∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)) → ((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
10	4, 9	syl 17	. . . . . 6 ⊢ (𝜑 → (∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)) → ((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
11	10	ralimdv 2963	. . . . 5 ⊢ (𝜑 → (∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)) → ∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
12	11	ralimdv 2963	. . . 4 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵∀𝑡 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝑡) → 𝑡 ∈ (𝑁‘𝑥)) → ∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
13	1, 12	mpd 15	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)))
14		r19.23v 3023	. . . . . 6 ⊢ (∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)) ↔ (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)))
15	14	biimpi 206	. . . . 5 ⊢ (∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)) → (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)))
16	15	a1i 11	. . . 4 ⊢ (𝜑 → (∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)) → (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
17	16	ralimdv 2963	. . 3 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 ∀𝑠 ∈ 𝒫 𝐵((𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)) → ∀𝑥 ∈ 𝐵 (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥))))
18	13, 17	mpd 15	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)))
19		neik0pk1imk0.k0p	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 (𝑁‘𝑥) ≠ ∅)
20		neik0pk1imk0.n	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑁 ∈ (𝒫 𝒫 𝐵 ↑𝑚 𝐵))
21		elmapi 7879	. . . . . . . . . . . . . 14 ⊢ (𝑁 ∈ (𝒫 𝒫 𝐵 ↑𝑚 𝐵) → 𝑁:𝐵⟶𝒫 𝒫 𝐵)
22	20, 21	syl 17	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑁:𝐵⟶𝒫 𝒫 𝐵)
23	22	ffvelrnda 6359	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑁‘𝑥) ∈ 𝒫 𝒫 𝐵)
24	23	elpwid 4170	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑁‘𝑥) ⊆ 𝒫 𝐵)
25	24	sseld 3602	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑠 ∈ (𝑁‘𝑥) → 𝑠 ∈ 𝒫 𝐵))
26	25	ancrd 577	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑠 ∈ (𝑁‘𝑥) → (𝑠 ∈ 𝒫 𝐵 ∧ 𝑠 ∈ (𝑁‘𝑥))))
27	26	eximdv 1846	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (∃𝑠 𝑠 ∈ (𝑁‘𝑥) → ∃𝑠(𝑠 ∈ 𝒫 𝐵 ∧ 𝑠 ∈ (𝑁‘𝑥))))
28		n0 3931	. . . . . . . 8 ⊢ ((𝑁‘𝑥) ≠ ∅ ↔ ∃𝑠 𝑠 ∈ (𝑁‘𝑥))
29		df-rex 2918	. . . . . . . 8 ⊢ (∃𝑠 ∈ 𝒫 𝐵𝑠 ∈ (𝑁‘𝑥) ↔ ∃𝑠(𝑠 ∈ 𝒫 𝐵 ∧ 𝑠 ∈ (𝑁‘𝑥)))
30	27, 28, 29	3imtr4g 285	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((𝑁‘𝑥) ≠ ∅ → ∃𝑠 ∈ 𝒫 𝐵𝑠 ∈ (𝑁‘𝑥)))
31	30	imp 445	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ (𝑁‘𝑥) ≠ ∅) → ∃𝑠 ∈ 𝒫 𝐵𝑠 ∈ (𝑁‘𝑥))
32		elpwi 4168	. . . . . . . . . 10 ⊢ (𝑠 ∈ 𝒫 𝐵 → 𝑠 ⊆ 𝐵)
33	25, 32	syl6 35	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵))
34	33	alrimiv 1855	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∀𝑠(𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵))
35		alral 2928	. . . . . . . 8 ⊢ (∀𝑠(𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵) → ∀𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵))
36	34, 35	syl 17	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∀𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵))
37	36	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ (𝑁‘𝑥) ≠ ∅) → ∀𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) → 𝑠 ⊆ 𝐵))
38	31, 37	r19.29imd 3074	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ (𝑁‘𝑥) ≠ ∅) → ∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵))
39	38	ex 450	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((𝑁‘𝑥) ≠ ∅ → ∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵)))
40	39	ralimdva 2962	. . 3 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 (𝑁‘𝑥) ≠ ∅ → ∀𝑥 ∈ 𝐵 ∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵)))
41	19, 40	mpd 15	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵))
42		ralim 2948	. 2 ⊢ (∀𝑥 ∈ 𝐵 (∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → 𝐵 ∈ (𝑁‘𝑥)) → (∀𝑥 ∈ 𝐵 ∃𝑠 ∈ 𝒫 𝐵(𝑠 ∈ (𝑁‘𝑥) ∧ 𝑠 ⊆ 𝐵) → ∀𝑥 ∈ 𝐵 𝐵 ∈ (𝑁‘𝑥)))
43	18, 41, 42	sylc 65	1 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 𝐵 ∈ (𝑁‘𝑥))

Syntax hints:   → wi 4   ∧ wa 384  ∀wal 1481   = wceq 1483  ∃wex 1704   ∈ wcel 1990   ≠ wne 2794  ∀wral 2912  ∃wrex 2913   ⊆ wss 3574  ∅c0 3915  𝒫 cpw 4158  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ↑_𝑚 cmap 7857

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-map 7859

This theorem is referenced by: (None)