Theorem acnccim 7582

Description: Given countable choice, every set has choice sets of length ω. (Contributed by Mario Carneiro, 31-Aug-2015.)

Assertion

Ref	Expression
acnccim	⊢ (CCHOICE → AC ω = V)

Proof of Theorem acnccim

Dummy variables 𝑓 𝑔 𝑗 𝑦 𝑧 𝑛 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl 109	. . . . . . 7 ⊢ ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → CCHOICE)
2		elmapfn 6904	. . . . . . . 8 ⊢ (𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω) → 𝑓 Fn ω)
3	2	adantl 277	. . . . . . 7 ⊢ ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → 𝑓 Fn ω)
4		elmapi 6903	. . . . . . . . . . . 12 ⊢ (𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω) → 𝑓:ω⟶{𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧})
5	4	ad2antlr 489	. . . . . . . . . . 11 ⊢ (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → 𝑓:ω⟶{𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧})
6		simpr 110	. . . . . . . . . . 11 ⊢ (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → 𝑛 ∈ ω)
7	5, 6	ffvelcdmd 5812	. . . . . . . . . 10 ⊢ (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → (𝑓‘𝑛) ∈ {𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧})
8		eleq2 2296	. . . . . . . . . . . 12 ⊢ (𝑧 = (𝑓‘𝑛) → (𝑗 ∈ 𝑧 ↔ 𝑗 ∈ (𝑓‘𝑛)))
9	8	exbidv 1874	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑓‘𝑛) → (∃𝑗 𝑗 ∈ 𝑧 ↔ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
10	9	elrab 2972	. . . . . . . . . 10 ⊢ ((𝑓‘𝑛) ∈ {𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↔ ((𝑓‘𝑛) ∈ 𝒫 𝑥 ∧ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
11	7, 10	sylib 122	. . . . . . . . 9 ⊢ (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → ((𝑓‘𝑛) ∈ 𝒫 𝑥 ∧ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
12	11	simprd 114	. . . . . . . 8 ⊢ (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → ∃𝑗 𝑗 ∈ (𝑓‘𝑛))
13	12	ralrimiva 2615	. . . . . . 7 ⊢ ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∀𝑛 ∈ ω ∃𝑗 𝑗 ∈ (𝑓‘𝑛))
14	1, 3, 13	cc2 7577	. . . . . 6 ⊢ ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∃𝑔(𝑔 Fn ω ∧ ∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)))
15		exsimpr 1667	. . . . . 6 ⊢ (∃𝑔(𝑔 Fn ω ∧ ∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)) → ∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
16	14, 15	syl 14	. . . . 5 ⊢ ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
17	16	ralrimiva 2615	. . . 4 ⊢ (CCHOICE → ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
18		vex 2815	. . . . 5 ⊢ 𝑥 ∈ V
19		omex 4714	. . . . 5 ⊢ ω ∈ V
20		isacnm 7509	. . . . 5 ⊢ ((𝑥 ∈ V ∧ ω ∈ V) → (𝑥 ∈ AC ω ↔ ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)))
21	18, 19, 20	mp2an 426	. . . 4 ⊢ (𝑥 ∈ AC ω ↔ ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
22	17, 21	sylibr 134	. . 3 ⊢ (CCHOICE → 𝑥 ∈ AC ω)
23	18	a1i 9	. . 3 ⊢ (CCHOICE → 𝑥 ∈ V)
24	22, 23	2thd 175	. 2 ⊢ (CCHOICE → (𝑥 ∈ AC ω ↔ 𝑥 ∈ V))
25	24	eqrdv 2230	1 ⊢ (CCHOICE → AC ω = V)

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1398  ∃wex 1541   ∈ wcel 2203  ∀wral 2520  {crab 2524  Vcvv 2812  𝒫 cpw 3668  ωcom 4711   Fn wfn 5346  ⟶wf 5347  ‘cfv 5351  (class class class)co 6049   ↑_𝑚 cmap 6881  AC wacn 7473  CCHOICEwacc 7572

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-ov 6052  df-oprab 6053  df-mpo 6054  df-2nd 6334  df-er 6766  df-map 6883  df-en 6975  df-acnm 7475  df-cc 7573

This theorem is referenced by: (None)