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Theorem fineqvlem 8784
 Description: Lemma for fineqv 8785. (Contributed by Mario Carneiro, 20-Jan-2013.) (Proof shortened by Stefan O'Rear, 3-Nov-2014.) (Revised by Mario Carneiro, 17-May-2015.)
Assertion
Ref Expression
fineqvlem ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → ω ≼ 𝒫 𝒫 𝐴)

Proof of Theorem fineqvlem
Dummy variables 𝑏 𝑐 𝑑 𝑒 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 pwexg 5252 . . . 4 (𝐴𝑉 → 𝒫 𝐴 ∈ V)
21adantr 484 . . 3 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → 𝒫 𝐴 ∈ V)
32pwexd 5253 . 2 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → 𝒫 𝒫 𝐴 ∈ V)
4 ssrab2 3987 . . . . 5 {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ⊆ 𝒫 𝐴
5 elpw2g 5219 . . . . . 6 (𝒫 𝐴 ∈ V → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} ∈ 𝒫 𝒫 𝐴 ↔ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ⊆ 𝒫 𝐴))
62, 5syl 17 . . . . 5 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} ∈ 𝒫 𝒫 𝐴 ↔ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ⊆ 𝒫 𝐴))
74, 6mpbiri 261 . . . 4 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ∈ 𝒫 𝒫 𝐴)
87a1d 25 . . 3 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → (𝑏 ∈ ω → {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ∈ 𝒫 𝒫 𝐴))
9 isinf 8783 . . . . . . . . 9 𝐴 ∈ Fin → ∀𝑏 ∈ ω ∃𝑒(𝑒𝐴𝑒𝑏))
109r19.21bi 3138 . . . . . . . 8 ((¬ 𝐴 ∈ Fin ∧ 𝑏 ∈ ω) → ∃𝑒(𝑒𝐴𝑒𝑏))
1110ad2ant2lr 747 . . . . . . 7 (((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) → ∃𝑒(𝑒𝐴𝑒𝑏))
12 velpw 4503 . . . . . . . . . . 11 (𝑒 ∈ 𝒫 𝐴𝑒𝐴)
1312biimpri 231 . . . . . . . . . 10 (𝑒𝐴𝑒 ∈ 𝒫 𝐴)
1413anim1i 617 . . . . . . . . 9 ((𝑒𝐴𝑒𝑏) → (𝑒 ∈ 𝒫 𝐴𝑒𝑏))
15 breq1 5040 . . . . . . . . . 10 (𝑑 = 𝑒 → (𝑑𝑏𝑒𝑏))
1615elrab 3605 . . . . . . . . 9 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ↔ (𝑒 ∈ 𝒫 𝐴𝑒𝑏))
1714, 16sylibr 237 . . . . . . . 8 ((𝑒𝐴𝑒𝑏) → 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏})
1817eximi 1837 . . . . . . 7 (∃𝑒(𝑒𝐴𝑒𝑏) → ∃𝑒 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏})
1911, 18syl 17 . . . . . 6 (((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) → ∃𝑒 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏})
20 eleq2 2841 . . . . . . . . 9 ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ↔ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐}))
2120biimpcd 252 . . . . . . . 8 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐}))
2221adantl 485 . . . . . . 7 ((((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) ∧ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏}) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐}))
2316simprbi 500 . . . . . . . . . 10 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} → 𝑒𝑏)
24 breq1 5040 . . . . . . . . . . . 12 (𝑑 = 𝑒 → (𝑑𝑐𝑒𝑐))
2524elrab 3605 . . . . . . . . . . 11 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐} ↔ (𝑒 ∈ 𝒫 𝐴𝑒𝑐))
2625simprbi 500 . . . . . . . . . 10 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑒𝑐)
27 ensym 8590 . . . . . . . . . . 11 (𝑒𝑏𝑏𝑒)
28 entr 8593 . . . . . . . . . . 11 ((𝑏𝑒𝑒𝑐) → 𝑏𝑐)
2927, 28sylan 583 . . . . . . . . . 10 ((𝑒𝑏𝑒𝑐) → 𝑏𝑐)
3023, 26, 29syl2an 598 . . . . . . . . 9 ((𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} ∧ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐}) → 𝑏𝑐)
3130ex 416 . . . . . . . 8 (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏} → (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑏𝑐))
3231adantl 485 . . . . . . 7 ((((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) ∧ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏}) → (𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑏𝑐))
33 nneneq 8736 . . . . . . . . 9 ((𝑏 ∈ ω ∧ 𝑐 ∈ ω) → (𝑏𝑐𝑏 = 𝑐))
3433biimpd 232 . . . . . . . 8 ((𝑏 ∈ ω ∧ 𝑐 ∈ ω) → (𝑏𝑐𝑏 = 𝑐))
3534ad2antlr 726 . . . . . . 7 ((((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) ∧ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏}) → (𝑏𝑐𝑏 = 𝑐))
3622, 32, 353syld 60 . . . . . 6 ((((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) ∧ 𝑒 ∈ {𝑑 ∈ 𝒫 𝐴𝑑𝑏}) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑏 = 𝑐))
3719, 36exlimddv 1937 . . . . 5 (((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} → 𝑏 = 𝑐))
38 breq2 5041 . . . . . 6 (𝑏 = 𝑐 → (𝑑𝑏𝑑𝑐))
3938rabbidv 3393 . . . . 5 (𝑏 = 𝑐 → {𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐})
4037, 39impbid1 228 . . . 4 (((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) ∧ (𝑏 ∈ ω ∧ 𝑐 ∈ ω)) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} ↔ 𝑏 = 𝑐))
4140ex 416 . . 3 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → ((𝑏 ∈ ω ∧ 𝑐 ∈ ω) → ({𝑑 ∈ 𝒫 𝐴𝑑𝑏} = {𝑑 ∈ 𝒫 𝐴𝑑𝑐} ↔ 𝑏 = 𝑐)))
428, 41dom2d 8582 . 2 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → (𝒫 𝒫 𝐴 ∈ V → ω ≼ 𝒫 𝒫 𝐴))
433, 42mpd 15 1 ((𝐴𝑉 ∧ ¬ 𝐴 ∈ Fin) → ω ≼ 𝒫 𝒫 𝐴)
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1539  ∃wex 1782   ∈ wcel 2112  {crab 3075  Vcvv 3410   ⊆ wss 3861  𝒫 cpw 4498   class class class wbr 5037  ωcom 7586   ≈ cen 8538   ≼ cdom 8539  Fincfn 8541 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 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2730  ax-rep 5161  ax-sep 5174  ax-nul 5181  ax-pow 5239  ax-pr 5303  ax-un 7466 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2071  df-mo 2558  df-eu 2589  df-clab 2737  df-cleq 2751  df-clel 2831  df-nfc 2902  df-ne 2953  df-ral 3076  df-rex 3077  df-reu 3078  df-rab 3080  df-v 3412  df-sbc 3700  df-csb 3809  df-dif 3864  df-un 3866  df-in 3868  df-ss 3878  df-pss 3880  df-nul 4229  df-if 4425  df-pw 4500  df-sn 4527  df-pr 4529  df-tp 4531  df-op 4533  df-uni 4803  df-iun 4889  df-br 5038  df-opab 5100  df-mpt 5118  df-tr 5144  df-id 5435  df-eprel 5440  df-po 5448  df-so 5449  df-fr 5488  df-we 5490  df-xp 5535  df-rel 5536  df-cnv 5537  df-co 5538  df-dm 5539  df-rn 5540  df-res 5541  df-ima 5542  df-ord 6178  df-on 6179  df-lim 6180  df-suc 6181  df-iota 6300  df-fun 6343  df-fn 6344  df-f 6345  df-f1 6346  df-fo 6347  df-f1o 6348  df-fv 6349  df-om 7587  df-er 8306  df-en 8542  df-dom 8543  df-fin 8545 This theorem is referenced by:  fineqv  8785  isfin1-2  9859
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