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Theorem ackbij1lem18 9019
Description: Lemma for ackbij1 9020. (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
ackbij1lem18 (𝐴 ∈ (𝒫 ω ∩ Fin) → ∃𝑏 ∈ (𝒫 ω ∩ Fin)(𝐹𝑏) = suc (𝐹𝐴))
Distinct variable groups:   𝐹,𝑏,𝑥,𝑦   𝐴,𝑏,𝑥,𝑦

Proof of Theorem ackbij1lem18
Dummy variable 𝑎 is distinct from all other variables.
StepHypRef Expression
1 difss 3721 . . . 4 (𝐴 (ω ∖ 𝐴)) ⊆ 𝐴
2 ackbij.f . . . . 5 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘ 𝑦𝑥 ({𝑦} × 𝒫 𝑦)))
32ackbij1lem11 9012 . . . 4 ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ (𝐴 (ω ∖ 𝐴)) ⊆ 𝐴) → (𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin))
41, 3mpan2 706 . . 3 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin))
5 difss 3721 . . . . . . 7 (ω ∖ 𝐴) ⊆ ω
6 omsson 7031 . . . . . . 7 ω ⊆ On
75, 6sstri 3597 . . . . . 6 (ω ∖ 𝐴) ⊆ On
8 ominf 8132 . . . . . . . 8 ¬ ω ∈ Fin
9 inss2 3818 . . . . . . . . 9 (𝒫 ω ∩ Fin) ⊆ Fin
109sseli 3584 . . . . . . . 8 (𝐴 ∈ (𝒫 ω ∩ Fin) → 𝐴 ∈ Fin)
11 difinf 8190 . . . . . . . 8 ((¬ ω ∈ Fin ∧ 𝐴 ∈ Fin) → ¬ (ω ∖ 𝐴) ∈ Fin)
128, 10, 11sylancr 694 . . . . . . 7 (𝐴 ∈ (𝒫 ω ∩ Fin) → ¬ (ω ∖ 𝐴) ∈ Fin)
13 0fin 8148 . . . . . . . . 9 ∅ ∈ Fin
14 eleq1 2686 . . . . . . . . 9 ((ω ∖ 𝐴) = ∅ → ((ω ∖ 𝐴) ∈ Fin ↔ ∅ ∈ Fin))
1513, 14mpbiri 248 . . . . . . . 8 ((ω ∖ 𝐴) = ∅ → (ω ∖ 𝐴) ∈ Fin)
1615necon3bi 2816 . . . . . . 7 (¬ (ω ∖ 𝐴) ∈ Fin → (ω ∖ 𝐴) ≠ ∅)
1712, 16syl 17 . . . . . 6 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ≠ ∅)
18 onint 6957 . . . . . 6 (((ω ∖ 𝐴) ⊆ On ∧ (ω ∖ 𝐴) ≠ ∅) → (ω ∖ 𝐴) ∈ (ω ∖ 𝐴))
197, 17, 18sylancr 694 . . . . 5 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ∈ (ω ∖ 𝐴))
2019eldifad 3572 . . . 4 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ∈ ω)
21 ackbij1lem4 9005 . . . 4 ( (ω ∖ 𝐴) ∈ ω → { (ω ∖ 𝐴)} ∈ (𝒫 ω ∩ Fin))
2220, 21syl 17 . . 3 (𝐴 ∈ (𝒫 ω ∩ Fin) → { (ω ∖ 𝐴)} ∈ (𝒫 ω ∩ Fin))
23 ackbij1lem6 9007 . . 3 (((𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin) ∧ { (ω ∖ 𝐴)} ∈ (𝒫 ω ∩ Fin)) → ((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)}) ∈ (𝒫 ω ∩ Fin))
244, 22, 23syl2anc 692 . 2 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)}) ∈ (𝒫 ω ∩ Fin))
2519eldifbd 3573 . . . . . 6 (𝐴 ∈ (𝒫 ω ∩ Fin) → ¬ (ω ∖ 𝐴) ∈ 𝐴)
26 disjsn 4223 . . . . . 6 ((𝐴 ∩ { (ω ∖ 𝐴)}) = ∅ ↔ ¬ (ω ∖ 𝐴) ∈ 𝐴)
2725, 26sylibr 224 . . . . 5 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐴 ∩ { (ω ∖ 𝐴)}) = ∅)
28 ssdisj 4004 . . . . 5 (((𝐴 (ω ∖ 𝐴)) ⊆ 𝐴 ∧ (𝐴 ∩ { (ω ∖ 𝐴)}) = ∅) → ((𝐴 (ω ∖ 𝐴)) ∩ { (ω ∖ 𝐴)}) = ∅)
291, 27, 28sylancr 694 . . . 4 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐴 (ω ∖ 𝐴)) ∩ { (ω ∖ 𝐴)}) = ∅)
302ackbij1lem9 9010 . . . 4 (((𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin) ∧ { (ω ∖ 𝐴)} ∈ (𝒫 ω ∩ Fin) ∧ ((𝐴 (ω ∖ 𝐴)) ∩ { (ω ∖ 𝐴)}) = ∅) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})) = ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹‘{ (ω ∖ 𝐴)})))
314, 22, 29, 30syl3anc 1323 . . 3 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})) = ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹‘{ (ω ∖ 𝐴)})))
322ackbij1lem14 9015 . . . . 5 ( (ω ∖ 𝐴) ∈ ω → (𝐹‘{ (ω ∖ 𝐴)}) = suc (𝐹 (ω ∖ 𝐴)))
3320, 32syl 17 . . . 4 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘{ (ω ∖ 𝐴)}) = suc (𝐹 (ω ∖ 𝐴)))
3433oveq2d 6631 . . 3 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹‘{ (ω ∖ 𝐴)})) = ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 suc (𝐹 (ω ∖ 𝐴))))
352ackbij1lem10 9011 . . . . . . 7 𝐹:(𝒫 ω ∩ Fin)⟶ω
3635ffvelrni 6324 . . . . . 6 ((𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin) → (𝐹‘(𝐴 (ω ∖ 𝐴))) ∈ ω)
374, 36syl 17 . . . . 5 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘(𝐴 (ω ∖ 𝐴))) ∈ ω)
38 ackbij1lem3 9004 . . . . . . 7 ( (ω ∖ 𝐴) ∈ ω → (ω ∖ 𝐴) ∈ (𝒫 ω ∩ Fin))
3920, 38syl 17 . . . . . 6 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ∈ (𝒫 ω ∩ Fin))
4035ffvelrni 6324 . . . . . 6 ( (ω ∖ 𝐴) ∈ (𝒫 ω ∩ Fin) → (𝐹 (ω ∖ 𝐴)) ∈ ω)
4139, 40syl 17 . . . . 5 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹 (ω ∖ 𝐴)) ∈ ω)
42 nnasuc 7646 . . . . 5 (((𝐹‘(𝐴 (ω ∖ 𝐴))) ∈ ω ∧ (𝐹 (ω ∖ 𝐴)) ∈ ω) → ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 suc (𝐹 (ω ∖ 𝐴))) = suc ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))))
4337, 41, 42syl2anc 692 . . . 4 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 suc (𝐹 (ω ∖ 𝐴))) = suc ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))))
44 incom 3789 . . . . . . . . 9 ((𝐴 (ω ∖ 𝐴)) ∩ (ω ∖ 𝐴)) = ( (ω ∖ 𝐴) ∩ (𝐴 (ω ∖ 𝐴)))
45 disjdif 4018 . . . . . . . . 9 ( (ω ∖ 𝐴) ∩ (𝐴 (ω ∖ 𝐴))) = ∅
4644, 45eqtri 2643 . . . . . . . 8 ((𝐴 (ω ∖ 𝐴)) ∩ (ω ∖ 𝐴)) = ∅
4746a1i 11 . . . . . . 7 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐴 (ω ∖ 𝐴)) ∩ (ω ∖ 𝐴)) = ∅)
482ackbij1lem9 9010 . . . . . . 7 (((𝐴 (ω ∖ 𝐴)) ∈ (𝒫 ω ∩ Fin) ∧ (ω ∖ 𝐴) ∈ (𝒫 ω ∩ Fin) ∧ ((𝐴 (ω ∖ 𝐴)) ∩ (ω ∖ 𝐴)) = ∅) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ (ω ∖ 𝐴))) = ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))))
494, 39, 47, 48syl3anc 1323 . . . . . 6 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ (ω ∖ 𝐴))) = ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))))
50 uncom 3741 . . . . . . . 8 ((𝐴 (ω ∖ 𝐴)) ∪ (ω ∖ 𝐴)) = ( (ω ∖ 𝐴) ∪ (𝐴 (ω ∖ 𝐴)))
51 onnmin 6965 . . . . . . . . . . . . . . 15 (((ω ∖ 𝐴) ⊆ On ∧ 𝑎 ∈ (ω ∖ 𝐴)) → ¬ 𝑎 (ω ∖ 𝐴))
527, 51mpan 705 . . . . . . . . . . . . . 14 (𝑎 ∈ (ω ∖ 𝐴) → ¬ 𝑎 (ω ∖ 𝐴))
5352con2i 134 . . . . . . . . . . . . 13 (𝑎 (ω ∖ 𝐴) → ¬ 𝑎 ∈ (ω ∖ 𝐴))
5453adantl 482 . . . . . . . . . . . 12 ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ 𝑎 (ω ∖ 𝐴)) → ¬ 𝑎 ∈ (ω ∖ 𝐴))
55 ordom 7036 . . . . . . . . . . . . . . 15 Ord ω
56 ordelss 5708 . . . . . . . . . . . . . . 15 ((Ord ω ∧ (ω ∖ 𝐴) ∈ ω) → (ω ∖ 𝐴) ⊆ ω)
5755, 20, 56sylancr 694 . . . . . . . . . . . . . 14 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ⊆ ω)
5857sselda 3588 . . . . . . . . . . . . 13 ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ 𝑎 (ω ∖ 𝐴)) → 𝑎 ∈ ω)
59 eldif 3570 . . . . . . . . . . . . . . . 16 (𝑎 ∈ (ω ∖ 𝐴) ↔ (𝑎 ∈ ω ∧ ¬ 𝑎𝐴))
6059simplbi2 654 . . . . . . . . . . . . . . 15 (𝑎 ∈ ω → (¬ 𝑎𝐴𝑎 ∈ (ω ∖ 𝐴)))
6160orrd 393 . . . . . . . . . . . . . 14 (𝑎 ∈ ω → (𝑎𝐴𝑎 ∈ (ω ∖ 𝐴)))
6261orcomd 403 . . . . . . . . . . . . 13 (𝑎 ∈ ω → (𝑎 ∈ (ω ∖ 𝐴) ∨ 𝑎𝐴))
6358, 62syl 17 . . . . . . . . . . . 12 ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ 𝑎 (ω ∖ 𝐴)) → (𝑎 ∈ (ω ∖ 𝐴) ∨ 𝑎𝐴))
64 orel1 397 . . . . . . . . . . . 12 𝑎 ∈ (ω ∖ 𝐴) → ((𝑎 ∈ (ω ∖ 𝐴) ∨ 𝑎𝐴) → 𝑎𝐴))
6554, 63, 64sylc 65 . . . . . . . . . . 11 ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ 𝑎 (ω ∖ 𝐴)) → 𝑎𝐴)
6665ex 450 . . . . . . . . . 10 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝑎 (ω ∖ 𝐴) → 𝑎𝐴))
6766ssrdv 3594 . . . . . . . . 9 (𝐴 ∈ (𝒫 ω ∩ Fin) → (ω ∖ 𝐴) ⊆ 𝐴)
68 undif 4027 . . . . . . . . 9 ( (ω ∖ 𝐴) ⊆ 𝐴 ↔ ( (ω ∖ 𝐴) ∪ (𝐴 (ω ∖ 𝐴))) = 𝐴)
6967, 68sylib 208 . . . . . . . 8 (𝐴 ∈ (𝒫 ω ∩ Fin) → ( (ω ∖ 𝐴) ∪ (𝐴 (ω ∖ 𝐴))) = 𝐴)
7050, 69syl5eq 2667 . . . . . . 7 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐴 (ω ∖ 𝐴)) ∪ (ω ∖ 𝐴)) = 𝐴)
7170fveq2d 6162 . . . . . 6 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ (ω ∖ 𝐴))) = (𝐹𝐴))
7249, 71eqtr3d 2657 . . . . 5 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))) = (𝐹𝐴))
73 suceq 5759 . . . . 5 (((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))) = (𝐹𝐴) → suc ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))) = suc (𝐹𝐴))
7472, 73syl 17 . . . 4 (𝐴 ∈ (𝒫 ω ∩ Fin) → suc ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 (𝐹 (ω ∖ 𝐴))) = suc (𝐹𝐴))
7543, 74eqtrd 2655 . . 3 (𝐴 ∈ (𝒫 ω ∩ Fin) → ((𝐹‘(𝐴 (ω ∖ 𝐴))) +𝑜 suc (𝐹 (ω ∖ 𝐴))) = suc (𝐹𝐴))
7631, 34, 753eqtrd 2659 . 2 (𝐴 ∈ (𝒫 ω ∩ Fin) → (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})) = suc (𝐹𝐴))
77 fveq2 6158 . . . 4 (𝑏 = ((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)}) → (𝐹𝑏) = (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})))
7877eqeq1d 2623 . . 3 (𝑏 = ((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)}) → ((𝐹𝑏) = suc (𝐹𝐴) ↔ (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})) = suc (𝐹𝐴)))
7978rspcev 3299 . 2 ((((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)}) ∈ (𝒫 ω ∩ Fin) ∧ (𝐹‘((𝐴 (ω ∖ 𝐴)) ∪ { (ω ∖ 𝐴)})) = suc (𝐹𝐴)) → ∃𝑏 ∈ (𝒫 ω ∩ Fin)(𝐹𝑏) = suc (𝐹𝐴))
8024, 76, 79syl2anc 692 1 (𝐴 ∈ (𝒫 ω ∩ Fin) → ∃𝑏 ∈ (𝒫 ω ∩ Fin)(𝐹𝑏) = suc (𝐹𝐴))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wo 383  wa 384   = wceq 1480  wcel 1987  wne 2790  wrex 2909  cdif 3557  cun 3558  cin 3559  wss 3560  c0 3897  𝒫 cpw 4136  {csn 4155   cint 4447   ciun 4492  cmpt 4683   × cxp 5082  Ord word 5691  Oncon0 5692  suc csuc 5694  cfv 5857  (class class class)co 6615  ωcom 7027   +𝑜 coa 7517  Fincfn 7915  cardccrd 8721
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 4741  ax-sep 4751  ax-nul 4759  ax-pow 4813  ax-pr 4877  ax-un 6914
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 2913  df-rex 2914  df-reu 2915  df-rmo 2916  df-rab 2917  df-v 3192  df-sbc 3423  df-csb 3520  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-pss 3576  df-nul 3898  df-if 4065  df-pw 4138  df-sn 4156  df-pr 4158  df-tp 4160  df-op 4162  df-uni 4410  df-int 4448  df-iun 4494  df-br 4624  df-opab 4684  df-mpt 4685  df-tr 4723  df-eprel 4995  df-id 4999  df-po 5005  df-so 5006  df-fr 5043  df-we 5045  df-xp 5090  df-rel 5091  df-cnv 5092  df-co 5093  df-dm 5094  df-rn 5095  df-res 5096  df-ima 5097  df-pred 5649  df-ord 5695  df-on 5696  df-lim 5697  df-suc 5698  df-iota 5820  df-fun 5859  df-fn 5860  df-f 5861  df-f1 5862  df-fo 5863  df-f1o 5864  df-fv 5865  df-ov 6618  df-oprab 6619  df-mpt2 6620  df-om 7028  df-1st 7128  df-2nd 7129  df-wrecs 7367  df-recs 7428  df-rdg 7466  df-1o 7520  df-2o 7521  df-oadd 7524  df-er 7702  df-map 7819  df-en 7916  df-dom 7917  df-sdom 7918  df-fin 7919  df-card 8725  df-cda 8950
This theorem is referenced by:  ackbij1  9020
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