tskcard - Metamath Proof Explorer

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Theorem tskcard 10810

Description: An even more direct relationship than r1tskina 10811 to get an inaccessible cardinal out of a Tarski class: the size of any nonempty Tarski class is an inaccessible cardinal. (Contributed by Mario Carneiro, 9-Jun-2013.)

**Assertion**
Ref	Expression
tskcard	⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (card‘𝑇) ∈ Inacc)

Proof of Theorem tskcard Dummy variables 𝑤 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cardeq0 10581	. . . 4 ⊢ (𝑇 ∈ Tarski → ((card‘𝑇) = ∅ ↔ 𝑇 = ∅))
2	1	necon3bid 2981	. . 3 ⊢ (𝑇 ∈ Tarski → ((card‘𝑇) ≠ ∅ ↔ 𝑇 ≠ ∅))
3	2	biimpar 476	. 2 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (card‘𝑇) ≠ ∅)
4		eqid 2727	. . . . . 6 ⊢ (𝑧 ∈ (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)})) ↦ (har‘(𝑤‘𝑧))) = (𝑧 ∈ (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)})) ↦ (har‘(𝑤‘𝑧)))
5	4	pwcfsdom 10612	. . . . 5 ⊢ (ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}) ≺ ((ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}) ↑_m (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)})))
6		vpwex 5379	. . . . . . . . . . . 12 ⊢ 𝒫 𝑥 ∈ V
7	6	canth2 9159	. . . . . . . . . . 11 ⊢ 𝒫 𝑥 ≺ 𝒫 𝒫 𝑥
8		simpl 481	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝑇 ∈ Tarski)
9		cardon 9973	. . . . . . . . . . . . . . . . 17 ⊢ (card‘𝑇) ∈ On
10	9	oneli 6486	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ (card‘𝑇) → 𝑥 ∈ On)
11	10	adantl 480	. . . . . . . . . . . . . . 15 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝑥 ∈ On)
12		cardsdomelir 10002	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ (card‘𝑇) → 𝑥 ≺ 𝑇)
13	12	adantl 480	. . . . . . . . . . . . . . 15 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝑥 ≺ 𝑇)
14		tskord 10809	. . . . . . . . . . . . . . 15 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ On ∧ 𝑥 ≺ 𝑇) → 𝑥 ∈ 𝑇)
15	8, 11, 13, 14	syl3anc 1368	. . . . . . . . . . . . . 14 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝑥 ∈ 𝑇)
16		tskpw 10782	. . . . . . . . . . . . . . 15 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ 𝑇) → 𝒫 𝑥 ∈ 𝑇)
17		tskpwss 10781	. . . . . . . . . . . . . . 15 ⊢ ((𝑇 ∈ Tarski ∧ 𝒫 𝑥 ∈ 𝑇) → 𝒫 𝒫 𝑥 ⊆ 𝑇)
18	16, 17	syldan 589	. . . . . . . . . . . . . 14 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ 𝑇) → 𝒫 𝒫 𝑥 ⊆ 𝑇)
19	15, 18	syldan 589	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝒫 𝒫 𝑥 ⊆ 𝑇)
20		ssdomg 9025	. . . . . . . . . . . . 13 ⊢ (𝑇 ∈ Tarski → (𝒫 𝒫 𝑥 ⊆ 𝑇 → 𝒫 𝒫 𝑥 ≼ 𝑇))
21	8, 19, 20	sylc 65	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝒫 𝒫 𝑥 ≼ 𝑇)
22		cardidg 10577	. . . . . . . . . . . . . 14 ⊢ (𝑇 ∈ Tarski → (card‘𝑇) ≈ 𝑇)
23	22	ensymd 9030	. . . . . . . . . . . . 13 ⊢ (𝑇 ∈ Tarski → 𝑇 ≈ (card‘𝑇))
24	23	adantr 479	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝑇 ≈ (card‘𝑇))
25		domentr 9038	. . . . . . . . . . . 12 ⊢ ((𝒫 𝒫 𝑥 ≼ 𝑇 ∧ 𝑇 ≈ (card‘𝑇)) → 𝒫 𝒫 𝑥 ≼ (card‘𝑇))
26	21, 24, 25	syl2anc 582	. . . . . . . . . . 11 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝒫 𝒫 𝑥 ≼ (card‘𝑇))
27		sdomdomtr 9139	. . . . . . . . . . 11 ⊢ ((𝒫 𝑥 ≺ 𝒫 𝒫 𝑥 ∧ 𝒫 𝒫 𝑥 ≼ (card‘𝑇)) → 𝒫 𝑥 ≺ (card‘𝑇))
28	7, 26, 27	sylancr 585	. . . . . . . . . 10 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ∈ (card‘𝑇)) → 𝒫 𝑥 ≺ (card‘𝑇))
29	28	ralrimiva 3142	. . . . . . . . 9 ⊢ (𝑇 ∈ Tarski → ∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇))
30	29	adantr 479	. . . . . . . 8 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇))
31		inawinalem 10718	. . . . . . . . . 10 ⊢ ((card‘𝑇) ∈ On → (∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇) → ∀𝑥 ∈ (card‘𝑇)∃𝑦 ∈ (card‘𝑇)𝑥 ≺ 𝑦))
32	9, 31	ax-mp 5	. . . . . . . . 9 ⊢ (∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇) → ∀𝑥 ∈ (card‘𝑇)∃𝑦 ∈ (card‘𝑇)𝑥 ≺ 𝑦)
33		winainflem 10722	. . . . . . . . . 10 ⊢ (((card‘𝑇) ≠ ∅ ∧ (card‘𝑇) ∈ On ∧ ∀𝑥 ∈ (card‘𝑇)∃𝑦 ∈ (card‘𝑇)𝑥 ≺ 𝑦) → ω ⊆ (card‘𝑇))
34	9, 33	mp3an2 1445	. . . . . . . . 9 ⊢ (((card‘𝑇) ≠ ∅ ∧ ∀𝑥 ∈ (card‘𝑇)∃𝑦 ∈ (card‘𝑇)𝑥 ≺ 𝑦) → ω ⊆ (card‘𝑇))
35	32, 34	sylan2 591	. . . . . . . 8 ⊢ (((card‘𝑇) ≠ ∅ ∧ ∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇)) → ω ⊆ (card‘𝑇))
36	3, 30, 35	syl2anc 582	. . . . . . 7 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ω ⊆ (card‘𝑇))
37		cardidm 9988	. . . . . . 7 ⊢ (card‘(card‘𝑇)) = (card‘𝑇)
38		cardaleph 10118	. . . . . . 7 ⊢ ((ω ⊆ (card‘𝑇) ∧ (card‘(card‘𝑇)) = (card‘𝑇)) → (card‘𝑇) = (ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}))
39	36, 37, 38	sylancl 584	. . . . . 6 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (card‘𝑇) = (ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}))
40	39	fveq2d 6904	. . . . . . 7 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (cf‘(card‘𝑇)) = (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)})))
41	39, 40	oveq12d 7442	. . . . . 6 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) = ((ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}) ↑_m (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}))))
42	39, 41	breq12d 5163	. . . . 5 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ((card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ↔ (ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}) ≺ ((ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)}) ↑_m (cf‘(ℵ‘∩ {𝑥 ∈ On ∣ (card‘𝑇) ⊆ (ℵ‘𝑥)})))))
43	5, 42	mpbiri 257	. . . 4 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))))
44		simp1 1133	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → 𝑇 ∈ Tarski)
45		simp3 1135	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))))
46		fvex 6913	. . . . . . . . . . . . . . . 16 ⊢ (card‘𝑇) ∈ V
47		fvex 6913	. . . . . . . . . . . . . . . 16 ⊢ (cf‘(card‘𝑇)) ∈ V
48	46, 47	elmap 8894	. . . . . . . . . . . . . . 15 ⊢ (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ↔ 𝑥:(cf‘(card‘𝑇))⟶(card‘𝑇))
49		fssxp 6754	. . . . . . . . . . . . . . 15 ⊢ (𝑥:(cf‘(card‘𝑇))⟶(card‘𝑇) → 𝑥 ⊆ ((cf‘(card‘𝑇)) × (card‘𝑇)))
50	48, 49	sylbi 216	. . . . . . . . . . . . . 14 ⊢ (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) → 𝑥 ⊆ ((cf‘(card‘𝑇)) × (card‘𝑇)))
51	15	ex 411	. . . . . . . . . . . . . . . 16 ⊢ (𝑇 ∈ Tarski → (𝑥 ∈ (card‘𝑇) → 𝑥 ∈ 𝑇))
52	51	ssrdv 3986	. . . . . . . . . . . . . . 15 ⊢ (𝑇 ∈ Tarski → (card‘𝑇) ⊆ 𝑇)
53		cfle 10283	. . . . . . . . . . . . . . . . 17 ⊢ (cf‘(card‘𝑇)) ⊆ (card‘𝑇)
54		sstr 3988	. . . . . . . . . . . . . . . . 17 ⊢ (((cf‘(card‘𝑇)) ⊆ (card‘𝑇) ∧ (card‘𝑇) ⊆ 𝑇) → (cf‘(card‘𝑇)) ⊆ 𝑇)
55	53, 54	mpan 688	. . . . . . . . . . . . . . . 16 ⊢ ((card‘𝑇) ⊆ 𝑇 → (cf‘(card‘𝑇)) ⊆ 𝑇)
56		tskxpss 10801	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ⊆ 𝑇 ∧ (card‘𝑇) ⊆ 𝑇) → ((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇)
57	56	3exp 1116	. . . . . . . . . . . . . . . . 17 ⊢ (𝑇 ∈ Tarski → ((cf‘(card‘𝑇)) ⊆ 𝑇 → ((card‘𝑇) ⊆ 𝑇 → ((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇)))
58	57	com23 86	. . . . . . . . . . . . . . . 16 ⊢ (𝑇 ∈ Tarski → ((card‘𝑇) ⊆ 𝑇 → ((cf‘(card‘𝑇)) ⊆ 𝑇 → ((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇)))
59	55, 58	mpdi 45	. . . . . . . . . . . . . . 15 ⊢ (𝑇 ∈ Tarski → ((card‘𝑇) ⊆ 𝑇 → ((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇))
60	52, 59	mpd 15	. . . . . . . . . . . . . 14 ⊢ (𝑇 ∈ Tarski → ((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇)
61		sstr2 3987	. . . . . . . . . . . . . 14 ⊢ (𝑥 ⊆ ((cf‘(card‘𝑇)) × (card‘𝑇)) → (((cf‘(card‘𝑇)) × (card‘𝑇)) ⊆ 𝑇 → 𝑥 ⊆ 𝑇))
62	50, 60, 61	syl2im 40	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) → (𝑇 ∈ Tarski → 𝑥 ⊆ 𝑇))
63	45, 44, 62	sylc 65	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → 𝑥 ⊆ 𝑇)
64		simp2 1134	. . . . . . . . . . . . 13 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → (cf‘(card‘𝑇)) ∈ (card‘𝑇))
65		ffn 6725	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥:(cf‘(card‘𝑇))⟶(card‘𝑇) → 𝑥 Fn (cf‘(card‘𝑇)))
66		fndmeng 9064	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 Fn (cf‘(card‘𝑇)) ∧ (cf‘(card‘𝑇)) ∈ V) → (cf‘(card‘𝑇)) ≈ 𝑥)
67	65, 47, 66	sylancl 584	. . . . . . . . . . . . . . . 16 ⊢ (𝑥:(cf‘(card‘𝑇))⟶(card‘𝑇) → (cf‘(card‘𝑇)) ≈ 𝑥)
68	48, 67	sylbi 216	. . . . . . . . . . . . . . 15 ⊢ (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) → (cf‘(card‘𝑇)) ≈ 𝑥)
69	68	ensymd 9030	. . . . . . . . . . . . . 14 ⊢ (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) → 𝑥 ≈ (cf‘(card‘𝑇)))
70		cardsdomelir 10002	. . . . . . . . . . . . . 14 ⊢ ((cf‘(card‘𝑇)) ∈ (card‘𝑇) → (cf‘(card‘𝑇)) ≺ 𝑇)
71		ensdomtr 9142	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ≈ (cf‘(card‘𝑇)) ∧ (cf‘(card‘𝑇)) ≺ 𝑇) → 𝑥 ≺ 𝑇)
72	69, 70, 71	syl2an 594	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → 𝑥 ≺ 𝑇)
73	45, 64, 72	syl2anc 582	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → 𝑥 ≺ 𝑇)
74		tskssel 10786	. . . . . . . . . . . 12 ⊢ ((𝑇 ∈ Tarski ∧ 𝑥 ⊆ 𝑇 ∧ 𝑥 ≺ 𝑇) → 𝑥 ∈ 𝑇)
75	44, 63, 73, 74	syl3anc 1368	. . . . . . . . . . 11 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇) ∧ 𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))) → 𝑥 ∈ 𝑇)
76	75	3expia 1118	. . . . . . . . . 10 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → (𝑥 ∈ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) → 𝑥 ∈ 𝑇))
77	76	ssrdv 3986	. . . . . . . . 9 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ⊆ 𝑇)
78		ssdomg 9025	. . . . . . . . . 10 ⊢ (𝑇 ∈ Tarski → (((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ⊆ 𝑇 → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ 𝑇))
79	78	imp 405	. . . . . . . . 9 ⊢ ((𝑇 ∈ Tarski ∧ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ⊆ 𝑇) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ 𝑇)
80	77, 79	syldan 589	. . . . . . . 8 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ 𝑇)
81	23	adantr 479	. . . . . . . 8 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → 𝑇 ≈ (card‘𝑇))
82		domentr 9038	. . . . . . . 8 ⊢ ((((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ 𝑇 ∧ 𝑇 ≈ (card‘𝑇)) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ (card‘𝑇))
83	80, 81, 82	syl2anc 582	. . . . . . 7 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → ((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ (card‘𝑇))
84		domnsym 9128	. . . . . . 7 ⊢ (((card‘𝑇) ↑_m (cf‘(card‘𝑇))) ≼ (card‘𝑇) → ¬ (card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))))
85	83, 84	syl 17	. . . . . 6 ⊢ ((𝑇 ∈ Tarski ∧ (cf‘(card‘𝑇)) ∈ (card‘𝑇)) → ¬ (card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇))))
86	85	ex 411	. . . . 5 ⊢ (𝑇 ∈ Tarski → ((cf‘(card‘𝑇)) ∈ (card‘𝑇) → ¬ (card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))))
87	86	adantr 479	. . . 4 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ((cf‘(card‘𝑇)) ∈ (card‘𝑇) → ¬ (card‘𝑇) ≺ ((card‘𝑇) ↑_m (cf‘(card‘𝑇)))))
88	43, 87	mt2d 136	. . 3 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → ¬ (cf‘(card‘𝑇)) ∈ (card‘𝑇))
89		cfon 10284	. . . . . 6 ⊢ (cf‘(card‘𝑇)) ∈ On
90	89, 9	onsseli 6493	. . . . 5 ⊢ ((cf‘(card‘𝑇)) ⊆ (card‘𝑇) ↔ ((cf‘(card‘𝑇)) ∈ (card‘𝑇) ∨ (cf‘(card‘𝑇)) = (card‘𝑇)))
91	53, 90	mpbi 229	. . . 4 ⊢ ((cf‘(card‘𝑇)) ∈ (card‘𝑇) ∨ (cf‘(card‘𝑇)) = (card‘𝑇))
92	91	ori 859	. . 3 ⊢ (¬ (cf‘(card‘𝑇)) ∈ (card‘𝑇) → (cf‘(card‘𝑇)) = (card‘𝑇))
93	88, 92	syl 17	. 2 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (cf‘(card‘𝑇)) = (card‘𝑇))
94		elina 10716	. 2 ⊢ ((card‘𝑇) ∈ Inacc ↔ ((card‘𝑇) ≠ ∅ ∧ (cf‘(card‘𝑇)) = (card‘𝑇) ∧ ∀𝑥 ∈ (card‘𝑇)𝒫 𝑥 ≺ (card‘𝑇)))
95	3, 93, 30, 94	syl3anbrc 1340	1 ⊢ ((𝑇 ∈ Tarski ∧ 𝑇 ≠ ∅) → (card‘𝑇) ∈ Inacc)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 ∨ wo 845 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2936 ∀wral 3057 ∃wrex 3066 {crab 3428 Vcvv 3471 ⊆ wss 3947 ∅c0 4324 𝒫 cpw 4604 ∩ cint 4951 class class class wbr 5150 ↦ cmpt 5233 × cxp 5678 Oncon0 6372 Fn wfn 6546 ⟶wf 6547 ‘cfv 6551 (class class class)co 7424 ωcom 7874 ↑_m cmap 8849 ≈ cen 8965 ≼ cdom 8966 ≺ csdm 8967 harchar 9585 cardccrd 9964 ℵcale 9965 cfccf 9966 Inacccina 10712 Tarskictsk 10777

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2698 ax-rep 5287 ax-sep 5301 ax-nul 5308 ax-pow 5367 ax-pr 5431 ax-un 7744 ax-inf2 9670 ax-ac2 10492

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2937 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4325 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4911 df-int 4952 df-iun 5000 df-iin 5001 df-br 5151 df-opab 5213 df-mpt 5234 df-tr 5268 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5635 df-se 5636 df-we 5637 df-xp 5686 df-rel 5687 df-cnv 5688 df-co 5689 df-dm 5690 df-rn 5691 df-res 5692 df-ima 5693 df-pred 6308 df-ord 6375 df-on 6376 df-lim 6377 df-suc 6378 df-iota 6503 df-fun 6553 df-fn 6554 df-f 6555 df-f1 6556 df-fo 6557 df-f1o 6558 df-fv 6559 df-isom 6560 df-riota 7380 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7875 df-1st 7997 df-2nd 7998 df-frecs 8291 df-wrecs 8322 df-smo 8371 df-recs 8396 df-rdg 8435 df-1o 8491 df-2o 8492 df-er 8729 df-map 8851 df-ixp 8921 df-en 8969 df-dom 8970 df-sdom 8971 df-fin 8972 df-oi 9539 df-har 9586 df-r1 9793 df-card 9968 df-aleph 9969 df-cf 9970 df-acn 9971 df-ac 10145 df-ina 10714 df-tsk 10778

This theorem is referenced by: r1tskina 10811 tskuni 10812 inaprc 10865

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