clsneifv3 - Mathbox for Richard Penner

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Theorem clsneifv3 43540

Description: Value of the neighborhoods (convergents) in terms of the closure (interior) function. (Contributed by RP, 27-Jun-2021.)

**Hypotheses**
Ref	Expression
clsnei.o	⊢ 𝑂 = (𝑖 ∈ V, 𝑗 ∈ V ↦ (𝑘 ∈ (𝒫 𝑗 ↑_m 𝑖) ↦ (𝑙 ∈ 𝑗 ↦ {𝑚 ∈ 𝑖 ∣ 𝑙 ∈ (𝑘‘𝑚)})))
clsnei.p	⊢ 𝑃 = (𝑛 ∈ V ↦ (𝑝 ∈ (𝒫 𝑛 ↑_m 𝒫 𝑛) ↦ (𝑜 ∈ 𝒫 𝑛 ↦ (𝑛 ∖ (𝑝‘(𝑛 ∖ 𝑜))))))
clsnei.d	⊢ 𝐷 = (𝑃‘𝐵)
clsnei.f	⊢ 𝐹 = (𝒫 𝐵𝑂𝐵)
clsnei.h	⊢ 𝐻 = (𝐹 ∘ 𝐷)
clsnei.r	⊢ (𝜑 → 𝐾𝐻𝑁)
clsneifv.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)

**Assertion**
Ref	Expression
clsneifv3	⊢ (𝜑 → (𝑁‘𝑋) = {𝑠 ∈ 𝒫 𝐵 ∣ ¬ 𝑋 ∈ (𝐾‘(𝐵 ∖ 𝑠))})

Distinct variable groups: 𝐵,𝑖,𝑗,𝑘,𝑙,𝑚,𝑠 𝐵,𝑛,𝑜,𝑝,𝑠 𝐷,𝑖,𝑗,𝑘,𝑙,𝑚 𝐷,𝑛,𝑜,𝑝 𝑖,𝐹,𝑗,𝑘,𝑙 𝑛,𝐹,𝑜,𝑝 𝑖,𝐾,𝑗,𝑘,𝑙,𝑚 𝑛,𝐾,𝑜,𝑝 𝑖,𝑁,𝑗,𝑘,𝑙,𝑠 𝑛,𝑁,𝑜,𝑝 𝑋,𝑙,𝑚,𝑠 𝜑,𝑖,𝑗,𝑘,𝑙,𝑠 𝜑,𝑛,𝑜,𝑝 Allowed substitution hints: 𝜑(𝑚) 𝐷(𝑠) 𝑃(𝑖,𝑗,𝑘,𝑚,𝑛,𝑜,𝑠,𝑝,𝑙) 𝐹(𝑚,𝑠) 𝐻(𝑖,𝑗,𝑘,𝑚,𝑛,𝑜,𝑠,𝑝,𝑙) 𝐾(𝑠) 𝑁(𝑚) 𝑂(𝑖,𝑗,𝑘,𝑚,𝑛,𝑜,𝑠,𝑝,𝑙) 𝑋(𝑖,𝑗,𝑘,𝑛,𝑜,𝑝)

**Proof of Theorem clsneifv3**
Step	Hyp	Ref	Expression
1		dfin5 3955	. 2 ⊢ (𝒫 𝐵 ∩ (𝑁‘𝑋)) = {𝑠 ∈ 𝒫 𝐵 ∣ 𝑠 ∈ (𝑁‘𝑋)}
2		clsnei.o	. . . . . . 7 ⊢ 𝑂 = (𝑖 ∈ V, 𝑗 ∈ V ↦ (𝑘 ∈ (𝒫 𝑗 ↑_m 𝑖) ↦ (𝑙 ∈ 𝑗 ↦ {𝑚 ∈ 𝑖 ∣ 𝑙 ∈ (𝑘‘𝑚)})))
3		clsnei.p	. . . . . . 7 ⊢ 𝑃 = (𝑛 ∈ V ↦ (𝑝 ∈ (𝒫 𝑛 ↑_m 𝒫 𝑛) ↦ (𝑜 ∈ 𝒫 𝑛 ↦ (𝑛 ∖ (𝑝‘(𝑛 ∖ 𝑜))))))
4		clsnei.d	. . . . . . 7 ⊢ 𝐷 = (𝑃‘𝐵)
5		clsnei.f	. . . . . . 7 ⊢ 𝐹 = (𝒫 𝐵𝑂𝐵)
6		clsnei.h	. . . . . . 7 ⊢ 𝐻 = (𝐹 ∘ 𝐷)
7		clsnei.r	. . . . . . 7 ⊢ (𝜑 → 𝐾𝐻𝑁)
8	2, 3, 4, 5, 6, 7	clsneinex 43537	. . . . . 6 ⊢ (𝜑 → 𝑁 ∈ (𝒫 𝒫 𝐵 ↑_m 𝐵))
9		elmapi 8867	. . . . . 6 ⊢ (𝑁 ∈ (𝒫 𝒫 𝐵 ↑_m 𝐵) → 𝑁:𝐵⟶𝒫 𝒫 𝐵)
10	8, 9	syl 17	. . . . 5 ⊢ (𝜑 → 𝑁:𝐵⟶𝒫 𝒫 𝐵)
11		clsneifv.x	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
12	10, 11	ffvelcdmd 7095	. . . 4 ⊢ (𝜑 → (𝑁‘𝑋) ∈ 𝒫 𝒫 𝐵)
13	12	elpwid 4612	. . 3 ⊢ (𝜑 → (𝑁‘𝑋) ⊆ 𝒫 𝐵)
14		sseqin2 4215	. . 3 ⊢ ((𝑁‘𝑋) ⊆ 𝒫 𝐵 ↔ (𝒫 𝐵 ∩ (𝑁‘𝑋)) = (𝑁‘𝑋))
15	13, 14	sylib 217	. 2 ⊢ (𝜑 → (𝒫 𝐵 ∩ (𝑁‘𝑋)) = (𝑁‘𝑋))
16	7	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → 𝐾𝐻𝑁)
17	11	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → 𝑋 ∈ 𝐵)
18		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → 𝑠 ∈ 𝒫 𝐵)
19	2, 3, 4, 5, 6, 16, 17, 18	clsneiel2 43539	. . . 4 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → (𝑋 ∈ (𝐾‘(𝐵 ∖ 𝑠)) ↔ ¬ 𝑠 ∈ (𝑁‘𝑋)))
20	19	con2bid 354	. . 3 ⊢ ((𝜑 ∧ 𝑠 ∈ 𝒫 𝐵) → (𝑠 ∈ (𝑁‘𝑋) ↔ ¬ 𝑋 ∈ (𝐾‘(𝐵 ∖ 𝑠))))
21	20	rabbidva 3436	. 2 ⊢ (𝜑 → {𝑠 ∈ 𝒫 𝐵 ∣ 𝑠 ∈ (𝑁‘𝑋)} = {𝑠 ∈ 𝒫 𝐵 ∣ ¬ 𝑋 ∈ (𝐾‘(𝐵 ∖ 𝑠))})
22	1, 15, 21	3eqtr3a 2792	1 ⊢ (𝜑 → (𝑁‘𝑋) = {𝑠 ∈ 𝒫 𝐵 ∣ ¬ 𝑋 ∈ (𝐾‘(𝐵 ∖ 𝑠))})

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1534 ∈ wcel 2099 {crab 3429 Vcvv 3471 ∖ cdif 3944 ∩ cin 3946 ⊆ wss 3947 𝒫 cpw 4603 class class class wbr 5148 ↦ cmpt 5231 ∘ ccom 5682 ⟶wf 6544 ‘cfv 6548 (class class class)co 7420 ∈ cmpo 7422 ↑_m cmap 8844

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-ral 3059 df-rex 3068 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5576 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 7993 df-2nd 7994 df-map 8846

This theorem is referenced by: (None)

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