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Theorem ackbij1lem17 9002
Description: Lemma for ackbij1 9004. (Contributed by Stefan O'Rear, 18-Nov-2014.)
Hypothesis
Ref Expression
ackbij.f 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘ 𝑦𝑥 ({𝑦} × 𝒫 𝑦)))
Assertion
Ref Expression
ackbij1lem17 𝐹:(𝒫 ω ∩ Fin)–1-1→ω
Distinct variable group:   𝑥,𝐹,𝑦

Proof of Theorem ackbij1lem17
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ackbij.f . . 3 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘ 𝑦𝑥 ({𝑦} × 𝒫 𝑦)))
21ackbij1lem10 8995 . 2 𝐹:(𝒫 ω ∩ Fin)⟶ω
31ackbij1lem16 9001 . . 3 ((𝑎 ∈ (𝒫 ω ∩ Fin) ∧ 𝑏 ∈ (𝒫 ω ∩ Fin)) → ((𝐹𝑎) = (𝐹𝑏) → 𝑎 = 𝑏))
43rgen2a 2971 . 2 𝑎 ∈ (𝒫 ω ∩ Fin)∀𝑏 ∈ (𝒫 ω ∩ Fin)((𝐹𝑎) = (𝐹𝑏) → 𝑎 = 𝑏)
5 dff13 6466 . 2 (𝐹:(𝒫 ω ∩ Fin)–1-1→ω ↔ (𝐹:(𝒫 ω ∩ Fin)⟶ω ∧ ∀𝑎 ∈ (𝒫 ω ∩ Fin)∀𝑏 ∈ (𝒫 ω ∩ Fin)((𝐹𝑎) = (𝐹𝑏) → 𝑎 = 𝑏)))
62, 4, 5mpbir2an 954 1 𝐹:(𝒫 ω ∩ Fin)–1-1→ω
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1480  wral 2907  cin 3554  𝒫 cpw 4130  {csn 4148   ciun 4485  cmpt 4673   × cxp 5072  wf 5843  1-1wf1 5844  cfv 5847  ωcom 7012  Fincfn 7899  cardccrd 8705
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-om 7013  df-1st 7113  df-2nd 7114  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-1o 7505  df-2o 7506  df-oadd 7509  df-er 7687  df-map 7804  df-en 7900  df-dom 7901  df-sdom 7902  df-fin 7903  df-card 8709  df-cda 8934
This theorem is referenced by:  ackbij1  9004  ackbij1b  9005  ackbij2lem2  9006
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