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Theorem acnccim 7639
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.
StepHypRef Expression
1 simpl 109 . . . . . . 7 ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → CCHOICE)
2 elmapfn 6952 . . . . . . . 8 (𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω) → 𝑓 Fn ω)
32adantl 277 . . . . . . 7 ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → 𝑓 Fn ω)
4 elmapi 6944 . . . . . . . . . . . 12 (𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω) → 𝑓:ω⟶{𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧})
54ad2antlr 493 . . . . . . . . . . 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)
75, 6ffvelcdmd 5844 . . . . . . . . . 10 (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → (𝑓‘𝑛) ∈ {𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧})
8 eleq2 2302 . . . . . . . . . . . 12 (𝑧 = (𝑓‘𝑛) → (𝑗 ∈ 𝑧 ↔ 𝑗 ∈ (𝑓‘𝑛)))
98exbidv 1878 . . . . . . . . . . 11 (𝑧 = (𝑓‘𝑛) → (∃𝑗 𝑗 ∈ 𝑧 ↔ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
109elrab 2982 . . . . . . . . . 10 ((𝑓‘𝑛) ∈ {𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↔ ((𝑓‘𝑛) ∈ 𝒫 𝑥 ∧ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
117, 10sylib 122 . . . . . . . . 9 (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → ((𝑓‘𝑛) ∈ 𝒫 𝑥 ∧ ∃𝑗 𝑗 ∈ (𝑓‘𝑛)))
1211simprd 114 . . . . . . . 8 (((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) ∧ 𝑛 ∈ ω) → ∃𝑗 𝑗 ∈ (𝑓‘𝑛))
1312ralrimiva 2623 . . . . . . 7 ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∀𝑛 ∈ ω ∃𝑗 𝑗 ∈ (𝑓‘𝑛))
141, 3, 13cc2 7634 . . . . . 6 ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∃𝑔(𝑔 Fn ω ∧ ∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)))
15 exsimpr 1671 . . . . . 6 (∃𝑔(𝑔 Fn ω ∧ ∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)) → ∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
1614, 15syl 14 . . . . 5 ((CCHOICE ∧ 𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)) → ∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
1716ralrimiva 2623 . . . 4 (CCHOICE → ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
18 vex 2824 . . . . 5 𝑥 ∈ V
19 omex 4740 . . . . 5 ω ∈ V
20 isacnm 7560 . . . . 5 ((𝑥 ∈ V ∧ ω ∈ V) → (𝑥 ∈ AC ω ↔ ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦)))
2118, 19, 20mp2an 430 . . . 4 (𝑥 ∈ AC ω ↔ ∀𝑓 ∈ ({𝑧 ∈ 𝒫 𝑥 ∣ ∃𝑗 𝑗 ∈ 𝑧} ↑𝑚 ω)∃𝑔∀𝑦 ∈ ω (𝑔‘𝑦) ∈ (𝑓‘𝑦))
2217, 21sylibr 134 . . 3 (CCHOICE → 𝑥 ∈ AC ω)
2318a1i 9 . . 3 (CCHOICE → 𝑥 ∈ V)
2422, 232thd 175 . 2 (CCHOICE → (𝑥 ∈ AC ω ↔ 𝑥 ∈ V))
2524eqrdv 2236 1 (CCHOICE → AC ω = V)
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1402  ∃wex 1545   ∈ wcel 2209  ∀wral 2528  {crab 2532  Vcvv 2821  𝒫 cpw 3688  ωcom 4737   Fn wfn 5372  ⟶wf 5373  ‘cfv 5377  (class class class)co 6085   ↑𝑚 cmap 6922  AC wacn 7524  CCHOICEwacc 7629
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-13 2211  ax-14 2212  ax-ext 2220  ax-coll 4246  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-iinf 4735
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-iom 4738  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-f1 5382  df-fo 5383  df-f1o 5384  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-2nd 6375  df-er 6807  df-map 6924  df-en 7023  df-acnm 7526  df-cc 7630
This theorem is used by: (None)
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