isacs5 - Metamath Proof Explorer

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Theorem isacs5 18505

Description: A closure system is algebraic iff the closure of a generating set is the union of the closures of its finite subsets. (Contributed by Stefan O'Rear, 2-Apr-2015.)

**Hypothesis**
Ref	Expression
acsdrscl.f	⊢ 𝐹 = (mrCls‘𝐶)

**Assertion**
Ref	Expression
isacs5	⊢ (𝐶 ∈ (ACS‘𝑋) ↔ (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))))

Distinct variable groups: 𝐶,𝑠 𝐹,𝑠 𝑋,𝑠

Proof of Theorem isacs5 Dummy variable 𝑡 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		isacs3lem 18499	. . 3 ⊢ (𝐶 ∈ (ACS‘𝑋) → (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝐶((toInc‘𝑠) ∈ Dirset → ∪ 𝑠 ∈ 𝐶)))
2		acsdrscl.f	. . . 4 ⊢ 𝐹 = (mrCls‘𝐶)
3	2	isacs4lem 18501	. . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝐶((toInc‘𝑠) ∈ Dirset → ∪ 𝑠 ∈ 𝐶)) → (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑡 ∈ 𝒫 𝒫 𝑋((toInc‘𝑡) ∈ Dirset → (𝐹‘∪ 𝑡) = ∪ (𝐹 “ 𝑡))))
4	2	isacs5lem 18502	. . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑡 ∈ 𝒫 𝒫 𝑋((toInc‘𝑡) ∈ Dirset → (𝐹‘∪ 𝑡) = ∪ (𝐹 “ 𝑡))) → (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))))
5	1, 3, 4	3syl 18	. 2 ⊢ (𝐶 ∈ (ACS‘𝑋) → (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))))
6		simpl 481	. . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → 𝐶 ∈ (Moore‘𝑋))
7		elpwi 4608	. . . . . . . . 9 ⊢ (𝑠 ∈ 𝒫 𝑋 → 𝑠 ⊆ 𝑋)
8	2	mrcidb2 17566	. . . . . . . . 9 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ⊆ 𝑋) → (𝑠 ∈ 𝐶 ↔ (𝐹‘𝑠) ⊆ 𝑠))
9	7, 8	sylan2 591	. . . . . . . 8 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) → (𝑠 ∈ 𝐶 ↔ (𝐹‘𝑠) ⊆ 𝑠))
10	9	adantr 479	. . . . . . 7 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → (𝑠 ∈ 𝐶 ↔ (𝐹‘𝑠) ⊆ 𝑠))
11		simpr 483	. . . . . . . . . 10 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)))
12	2	mrcf 17557	. . . . . . . . . . . 12 ⊢ (𝐶 ∈ (Moore‘𝑋) → 𝐹:𝒫 𝑋⟶𝐶)
13		ffun 6719	. . . . . . . . . . . 12 ⊢ (𝐹:𝒫 𝑋⟶𝐶 → Fun 𝐹)
14		funiunfv 7249	. . . . . . . . . . . 12 ⊢ (Fun 𝐹 → ∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)))
15	12, 13, 14	3syl 18	. . . . . . . . . . 11 ⊢ (𝐶 ∈ (Moore‘𝑋) → ∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)))
16	15	ad2antrr 722	. . . . . . . . . 10 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → ∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)))
17	11, 16	eqtr4d 2773	. . . . . . . . 9 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → (𝐹‘𝑠) = ∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡))
18	17	sseq1d 4012	. . . . . . . 8 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → ((𝐹‘𝑠) ⊆ 𝑠 ↔ ∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠))
19		iunss 5047	. . . . . . . 8 ⊢ (∪ 𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠)
20	18, 19	bitrdi 286	. . . . . . 7 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → ((𝐹‘𝑠) ⊆ 𝑠 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠))
21	10, 20	bitrd 278	. . . . . 6 ⊢ (((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) ∧ (𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → (𝑠 ∈ 𝐶 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠))
22	21	ex 411	. . . . 5 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑠 ∈ 𝒫 𝑋) → ((𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)) → (𝑠 ∈ 𝐶 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠)))
23	22	ralimdva 3165	. . . 4 ⊢ (𝐶 ∈ (Moore‘𝑋) → (∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin)) → ∀𝑠 ∈ 𝒫 𝑋(𝑠 ∈ 𝐶 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠)))
24	23	imp 405	. . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → ∀𝑠 ∈ 𝒫 𝑋(𝑠 ∈ 𝐶 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠))
25	2	isacs2 17601	. . 3 ⊢ (𝐶 ∈ (ACS‘𝑋) ↔ (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝑠 ∈ 𝐶 ↔ ∀𝑡 ∈ (𝒫 𝑠 ∩ Fin)(𝐹‘𝑡) ⊆ 𝑠)))
26	6, 24, 25	sylanbrc 581	. 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))) → 𝐶 ∈ (ACS‘𝑋))
27	5, 26	impbii 208	1 ⊢ (𝐶 ∈ (ACS‘𝑋) ↔ (𝐶 ∈ (Moore‘𝑋) ∧ ∀𝑠 ∈ 𝒫 𝑋(𝐹‘𝑠) = ∪ (𝐹 “ (𝒫 𝑠 ∩ Fin))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 = wceq 1539 ∈ wcel 2104 ∀wral 3059 ∩ cin 3946 ⊆ wss 3947 𝒫 cpw 4601 ∪ cuni 4907 ∪ ciun 4996 “ cima 5678 Fun wfun 6536 ⟶wf 6538 ‘cfv 6542 Fincfn 8941 Moorecmre 17530 mrClscmrc 17531 ACScacs 17533 Dirsetcdrs 18251 toInccipo 18484

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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-fz 13489 df-struct 17084 df-slot 17119 df-ndx 17131 df-base 17149 df-tset 17220 df-ple 17221 df-ocomp 17222 df-mre 17534 df-mrc 17535 df-acs 17537 df-proset 18252 df-drs 18253 df-poset 18270 df-ipo 18485

This theorem is referenced by: isacs4 18506

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