Theorem grothac 10814

Description: The Tarski-Grothendieck Axiom implies the Axiom of Choice (in the form of cardeqv 10452). This can be put in a more conventional form via ween 10018 and dfac8 10118. Note that the mere existence of strongly inaccessible cardinals doesn't imply AC, but rather the particular form of the Tarski-Grothendieck axiom (see https://fomarchive.ugent.be/2008-March/012783.html 10118). (Contributed by Mario Carneiro, 19-Apr-2013.) (New usage is discouraged.)

Assertion

Ref	Expression
grothac	⊢ dom card = V

Proof of Theorem grothac

Dummy variables 𝑥 𝑦 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		pweq 4581	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → 𝒫 𝑥 = 𝒫 𝑦)
2	1	sseq1d 3976	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → (𝒫 𝑥 ⊆ 𝑢 ↔ 𝒫 𝑦 ⊆ 𝑢))
3	1	eleq1d 2854	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → (𝒫 𝑥 ∈ 𝑢 ↔ 𝒫 𝑦 ∈ 𝑢))
4	2, 3	anbi12d 643	. . . . . . . 8 ⊢ (𝑥 = 𝑦 → ((𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢) ↔ (𝒫 𝑦 ⊆ 𝑢 ∧ 𝒫 𝑦 ∈ 𝑢)))
5	4	rspcva 3588	. . . . . . 7 ⊢ ((𝑦 ∈ 𝑢 ∧ ∀𝑥 ∈ 𝑢 (𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢)) → (𝒫 𝑦 ⊆ 𝑢 ∧ 𝒫 𝑦 ∈ 𝑢))
6	5	simpld 499	. . . . . 6 ⊢ ((𝑦 ∈ 𝑢 ∧ ∀𝑥 ∈ 𝑢 (𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢)) → 𝒫 𝑦 ⊆ 𝑢)
7		rabss 4032	. . . . . . 7 ⊢ ({𝑥 ∈ 𝒫 𝑢 ∣ 𝑥 ≺ 𝑢} ⊆ 𝑢 ↔ ∀𝑥 ∈ 𝒫 𝑢(𝑥 ≺ 𝑢 → 𝑥 ∈ 𝑢))
8	7	biimpri 231	. . . . . 6 ⊢ (∀𝑥 ∈ 𝒫 𝑢(𝑥 ≺ 𝑢 → 𝑥 ∈ 𝑢) → {𝑥 ∈ 𝒫 𝑢 ∣ 𝑥 ≺ 𝑢} ⊆ 𝑢)
9		vex 3467	. . . . . . . . . 10 ⊢ 𝑦 ∈ V
10	9	canth2 9117	. . . . . . . . 9 ⊢ 𝑦 ≺ 𝒫 𝑦
11		sdomdom 8976	. . . . . . . . 9 ⊢ (𝑦 ≺ 𝒫 𝑦 → 𝑦 ≼ 𝒫 𝑦)
12	10, 11	ax-mp 5	. . . . . . . 8 ⊢ 𝑦 ≼ 𝒫 𝑦
13		ssdomg 8996	. . . . . . . . 9 ⊢ (𝑢 ∈ V → (𝒫 𝑦 ⊆ 𝑢 → 𝒫 𝑦 ≼ 𝑢))
14	13	elv 3468	. . . . . . . 8 ⊢ (𝒫 𝑦 ⊆ 𝑢 → 𝒫 𝑦 ≼ 𝑢)
15		domtr 9003	. . . . . . . 8 ⊢ ((𝑦 ≼ 𝒫 𝑦 ∧ 𝒫 𝑦 ≼ 𝑢) → 𝑦 ≼ 𝑢)
16	12, 14, 15	sylancr 598	. . . . . . 7 ⊢ (𝒫 𝑦 ⊆ 𝑢 → 𝑦 ≼ 𝑢)
17		vex 3467	. . . . . . . 8 ⊢ 𝑢 ∈ V
18		tskwe 9935	. . . . . . . 8 ⊢ ((𝑢 ∈ V ∧ {𝑥 ∈ 𝒫 𝑢 ∣ 𝑥 ≺ 𝑢} ⊆ 𝑢) → 𝑢 ∈ dom card)
19	17, 18	mpan 702	. . . . . . 7 ⊢ ({𝑥 ∈ 𝒫 𝑢 ∣ 𝑥 ≺ 𝑢} ⊆ 𝑢 → 𝑢 ∈ dom card)
20		numdom 10021	. . . . . . . 8 ⊢ ((𝑢 ∈ dom card ∧ 𝑦 ≼ 𝑢) → 𝑦 ∈ dom card)
21	20	expcom 418	. . . . . . 7 ⊢ (𝑦 ≼ 𝑢 → (𝑢 ∈ dom card → 𝑦 ∈ dom card))
22	16, 19, 21	syl2im 41	. . . . . 6 ⊢ (𝒫 𝑦 ⊆ 𝑢 → ({𝑥 ∈ 𝒫 𝑢 ∣ 𝑥 ≺ 𝑢} ⊆ 𝑢 → 𝑦 ∈ dom card))
23	6, 8, 22	syl2im 41	. . . . 5 ⊢ ((𝑦 ∈ 𝑢 ∧ ∀𝑥 ∈ 𝑢 (𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢)) → (∀𝑥 ∈ 𝒫 𝑢(𝑥 ≺ 𝑢 → 𝑥 ∈ 𝑢) → 𝑦 ∈ dom card))
24	23	3impia 1133	. . . 4 ⊢ ((𝑦 ∈ 𝑢 ∧ ∀𝑥 ∈ 𝑢 (𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢) ∧ ∀𝑥 ∈ 𝒫 𝑢(𝑥 ≺ 𝑢 → 𝑥 ∈ 𝑢)) → 𝑦 ∈ dom card)
25		axgroth6 10812	. . . 4 ⊢ ∃𝑢(𝑦 ∈ 𝑢 ∧ ∀𝑥 ∈ 𝑢 (𝒫 𝑥 ⊆ 𝑢 ∧ 𝒫 𝑥 ∈ 𝑢) ∧ ∀𝑥 ∈ 𝒫 𝑢(𝑥 ≺ 𝑢 → 𝑥 ∈ 𝑢))
26	24, 25	exlimiiv 1958	. . 3 ⊢ 𝑦 ∈ dom card
27	26, 9	2th 267	. 2 ⊢ (𝑦 ∈ dom card ↔ 𝑦 ∈ V)
28	27	eqriv 2766	1 ⊢ dom card = V

Syntax hints:   → wi 4   ∧ wa 400   ∧ w3a 1101   = wceq 1567   ∈ wcel 2149  ∀wral 3085  {crab 3423  Vcvv 3463   ⊆ wss 3913  𝒫 cpw 4567   class class class wbr 5113  dom cdm 5662   ≼ cdom 8940   ≺ csdm 8941  cardccrd 9920

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-rep 5242  ax-sep 5261  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733  ax-groth 10807

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rmo 3376  df-reu 3377  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-pss 3933  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-int 4917  df-iun 4962  df-br 5114  df-opab 5178  df-mpt 5197  df-tr 5223  df-id 5557  df-eprel 5562  df-po 5570  df-so 5571  df-fr 5615  df-se 5616  df-we 5617  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-res 5674  df-ima 5675  df-pred 6303  df-ord 6364  df-on 6365  df-suc 6367  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-isom 6546  df-riota 7368  df-ov 7414  df-2nd 7986  df-frecs 8277  df-wrecs 8308  df-recs 8357  df-er 8693  df-en 8943  df-dom 8944  df-sdom 8945  df-card 9924

This theorem is referenced by:  axgroth3  10815