acsfiindd - Metamath Proof Explorer

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Theorem acsfiindd 18502

Description: In an algebraic closure system, a set is independent if and only if all its finite subsets are independent. Part of Proposition 4.1.3 in [FaureFrolicher] p. 83. (Contributed by David Moews, 1-May-2017.)

**Hypotheses**
Ref	Expression
acsfiindd.1	⊢ (𝜑 → 𝐴 ∈ (ACS‘𝑋))
acsfiindd.2	⊢ 𝑁 = (mrCls‘𝐴)
acsfiindd.3	⊢ 𝐼 = (mrInd‘𝐴)
acsfiindd.4	⊢ (𝜑 → 𝑆 ⊆ 𝑋)

**Assertion**
Ref	Expression
acsfiindd	⊢ (𝜑 → (𝑆 ∈ 𝐼 ↔ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼))

Proof of Theorem acsfiindd Dummy variables 𝑥 𝑠 𝑡 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		acsfiindd.1	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ (ACS‘𝑋))
2	1	acsmred 17596	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ (Moore‘𝑋))
3	2	ad2antrr 725	. . . . 5 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝐴 ∈ (Moore‘𝑋))
4		acsfiindd.2	. . . . 5 ⊢ 𝑁 = (mrCls‘𝐴)
5		acsfiindd.3	. . . . 5 ⊢ 𝐼 = (mrInd‘𝐴)
6		simplr 768	. . . . 5 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝑆 ∈ 𝐼)
7		simpr 486	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝑠 ∈ (𝒫 𝑆 ∩ Fin))
8	7	elin1d 4197	. . . . . 6 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝑠 ∈ 𝒫 𝑆)
9	8	elpwid 4610	. . . . 5 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝑠 ⊆ 𝑆)
10	3, 4, 5, 6, 9	mrissmrid 17581	. . . 4 ⊢ (((𝜑 ∧ 𝑆 ∈ 𝐼) ∧ 𝑠 ∈ (𝒫 𝑆 ∩ Fin)) → 𝑠 ∈ 𝐼)
11	10	ralrimiva 3147	. . 3 ⊢ ((𝜑 ∧ 𝑆 ∈ 𝐼) → ∀𝑠 ∈ (𝒫 𝑆 ∩ Fin)𝑠 ∈ 𝐼)
12		dfss3 3969	. . 3 ⊢ ((𝒫 𝑆 ∩ Fin) ⊆ 𝐼 ↔ ∀𝑠 ∈ (𝒫 𝑆 ∩ Fin)𝑠 ∈ 𝐼)
13	11, 12	sylibr 233	. 2 ⊢ ((𝜑 ∧ 𝑆 ∈ 𝐼) → (𝒫 𝑆 ∩ Fin) ⊆ 𝐼)
14	2	adantr 482	. . 3 ⊢ ((𝜑 ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → 𝐴 ∈ (Moore‘𝑋))
15		acsfiindd.4	. . . 4 ⊢ (𝜑 → 𝑆 ⊆ 𝑋)
16	15	adantr 482	. . 3 ⊢ ((𝜑 ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → 𝑆 ⊆ 𝑋)
17		simpr 486	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin))
18		elfpw 9350	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) ↔ (𝑡 ⊆ (𝑆 ∖ {𝑥}) ∧ 𝑡 ∈ Fin))
19	17, 18	sylib 217	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → (𝑡 ⊆ (𝑆 ∖ {𝑥}) ∧ 𝑡 ∈ Fin))
20	19	simpld 496	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → 𝑡 ⊆ (𝑆 ∖ {𝑥}))
21	20	difss2d 4133	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → 𝑡 ⊆ 𝑆)
22		simplr 768	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → 𝑥 ∈ 𝑆)
23	22	snssd 4811	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → {𝑥} ⊆ 𝑆)
24	21, 23	unssd 4185	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → (𝑡 ∪ {𝑥}) ⊆ 𝑆)
25	19	simprd 497	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → 𝑡 ∈ Fin)
26		snfi 9040	. . . . . . . . . . . 12 ⊢ {𝑥} ∈ Fin
27		unfi 9168	. . . . . . . . . . . 12 ⊢ ((𝑡 ∈ Fin ∧ {𝑥} ∈ Fin) → (𝑡 ∪ {𝑥}) ∈ Fin)
28	25, 26, 27	sylancl 587	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → (𝑡 ∪ {𝑥}) ∈ Fin)
29		elfpw 9350	. . . . . . . . . . 11 ⊢ ((𝑡 ∪ {𝑥}) ∈ (𝒫 𝑆 ∩ Fin) ↔ ((𝑡 ∪ {𝑥}) ⊆ 𝑆 ∧ (𝑡 ∪ {𝑥}) ∈ Fin))
30	24, 28, 29	sylanbrc 584	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → (𝑡 ∪ {𝑥}) ∈ (𝒫 𝑆 ∩ Fin))
31	2	ad4antr 731	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → 𝐴 ∈ (Moore‘𝑋))
32		simpr 486	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → 𝑠 ∈ 𝐼)
33		simpllr 775	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑥 ∈ 𝑆)
34		snidg 4661	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ 𝑆 → 𝑥 ∈ {𝑥})
35		elun2 4176	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ {𝑥} → 𝑥 ∈ (𝑡 ∪ {𝑥}))
36	33, 34, 35	3syl 18	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑥 ∈ (𝑡 ∪ {𝑥}))
37		simpr 486	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑠 = (𝑡 ∪ {𝑥}))
38	36, 37	eleqtrrd 2837	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑥 ∈ 𝑠)
39	38	adantr 482	. . . . . . . . . . . . 13 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → 𝑥 ∈ 𝑠)
40	4, 5, 31, 32, 39	ismri2dad 17577	. . . . . . . . . . . 12 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → ¬ 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥})))
41	2	ad3antrrr 729	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝐴 ∈ (Moore‘𝑋))
42	20	adantr 482	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑡 ⊆ (𝑆 ∖ {𝑥}))
43		neldifsnd 4795	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → ¬ 𝑥 ∈ (𝑆 ∖ {𝑥}))
44	42, 43	ssneldd 3984	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → ¬ 𝑥 ∈ 𝑡)
45		difsnb 4808	. . . . . . . . . . . . . . . . 17 ⊢ (¬ 𝑥 ∈ 𝑡 ↔ (𝑡 ∖ {𝑥}) = 𝑡)
46	44, 45	sylib 217	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑡 ∖ {𝑥}) = 𝑡)
47		ssun1 4171	. . . . . . . . . . . . . . . . . 18 ⊢ 𝑡 ⊆ (𝑡 ∪ {𝑥})
48	47, 37	sseqtrrid 4034	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑡 ⊆ 𝑠)
49	48	ssdifd 4139	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑡 ∖ {𝑥}) ⊆ (𝑠 ∖ {𝑥}))
50	46, 49	eqsstrrd 4020	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑡 ⊆ (𝑠 ∖ {𝑥}))
51	24	adantr 482	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑡 ∪ {𝑥}) ⊆ 𝑆)
52	15	ad3antrrr 729	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑆 ⊆ 𝑋)
53	51, 52	sstrd 3991	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑡 ∪ {𝑥}) ⊆ 𝑋)
54	37, 53	eqsstrd 4019	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → 𝑠 ⊆ 𝑋)
55	54	ssdifssd 4141	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑠 ∖ {𝑥}) ⊆ 𝑋)
56	41, 4, 50, 55	mrcssd 17564	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑁‘𝑡) ⊆ (𝑁‘(𝑠 ∖ {𝑥})))
57	56	sseld 3980	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑥 ∈ (𝑁‘𝑡) → 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
58	57	adantr 482	. . . . . . . . . . . 12 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → (𝑥 ∈ (𝑁‘𝑡) → 𝑥 ∈ (𝑁‘(𝑠 ∖ {𝑥}))))
59	40, 58	mtod 197	. . . . . . . . . . 11 ⊢ (((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) ∧ 𝑠 ∈ 𝐼) → ¬ 𝑥 ∈ (𝑁‘𝑡))
60	59	ex 414	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) ∧ 𝑠 = (𝑡 ∪ {𝑥})) → (𝑠 ∈ 𝐼 → ¬ 𝑥 ∈ (𝑁‘𝑡)))
61	30, 60	rspcimdv 3602	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → (∀𝑠 ∈ (𝒫 𝑆 ∩ Fin)𝑠 ∈ 𝐼 → ¬ 𝑥 ∈ (𝑁‘𝑡)))
62	12, 61	biimtrid 241	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ 𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)) → ((𝒫 𝑆 ∩ Fin) ⊆ 𝐼 → ¬ 𝑥 ∈ (𝑁‘𝑡)))
63	62	impancom 453	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → (𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) → ¬ 𝑥 ∈ (𝑁‘𝑡)))
64	63	ralrimiv 3146	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → ∀𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) ¬ 𝑥 ∈ (𝑁‘𝑡))
65	15	ssdifssd 4141	. . . . . . . . . 10 ⊢ (𝜑 → (𝑆 ∖ {𝑥}) ⊆ 𝑋)
66	1, 4, 65	acsficl2d 18501	. . . . . . . . 9 ⊢ (𝜑 → (𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})) ↔ ∃𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)𝑥 ∈ (𝑁‘𝑡)))
67	66	notbid 318	. . . . . . . 8 ⊢ (𝜑 → (¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})) ↔ ¬ ∃𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)𝑥 ∈ (𝑁‘𝑡)))
68		ralnex 3073	. . . . . . . 8 ⊢ (∀𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) ¬ 𝑥 ∈ (𝑁‘𝑡) ↔ ¬ ∃𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin)𝑥 ∈ (𝑁‘𝑡))
69	67, 68	bitr4di 289	. . . . . . 7 ⊢ (𝜑 → (¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})) ↔ ∀𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) ¬ 𝑥 ∈ (𝑁‘𝑡)))
70	69	ad2antrr 725	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → (¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})) ↔ ∀𝑡 ∈ (𝒫 (𝑆 ∖ {𝑥}) ∩ Fin) ¬ 𝑥 ∈ (𝑁‘𝑡)))
71	64, 70	mpbird 257	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑆) ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → ¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})))
72	71	an32s 651	. . . 4 ⊢ (((𝜑 ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) ∧ 𝑥 ∈ 𝑆) → ¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})))
73	72	ralrimiva 3147	. . 3 ⊢ ((𝜑 ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → ∀𝑥 ∈ 𝑆 ¬ 𝑥 ∈ (𝑁‘(𝑆 ∖ {𝑥})))
74	4, 5, 14, 16, 73	ismri2dd 17574	. 2 ⊢ ((𝜑 ∧ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼) → 𝑆 ∈ 𝐼)
75	13, 74	impbida 800	1 ⊢ (𝜑 → (𝑆 ∈ 𝐼 ↔ (𝒫 𝑆 ∩ Fin) ⊆ 𝐼))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ∀wral 3062 ∃wrex 3071 ∖ cdif 3944 ∪ cun 3945 ∩ cin 3946 ⊆ wss 3947 𝒫 cpw 4601 {csn 4627 ‘cfv 6540 Fincfn 8935 Moorecmre 17522 mrClscmrc 17523 mrIndcmri 17524 ACScacs 17525

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7720 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 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 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7851 df-1st 7970 df-2nd 7971 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-1o 8461 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-fz 13481 df-struct 17076 df-slot 17111 df-ndx 17123 df-base 17141 df-tset 17212 df-ple 17213 df-ocomp 17214 df-mre 17526 df-mrc 17527 df-mri 17528 df-acs 17529 df-proset 18244 df-drs 18245 df-poset 18262 df-ipo 18477

This theorem is referenced by: (None)

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