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Theorem bnj849 33931
Description: Technical lemma for bnj69 34016. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (Proof shortened by Mario Carneiro, 22-Dec-2016.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj849.1 (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
bnj849.2 (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖𝑛 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
bnj849.3 𝐷 = (ω ∖ {∅})
bnj849.4 𝐵 = {𝑓 ∣ ∃𝑛𝐷 (𝑓 Fn 𝑛𝜑𝜓)}
bnj849.5 (𝜒 ↔ (𝑅 FrSe 𝐴𝑋𝐴𝑛𝐷))
bnj849.6 (𝜃 ↔ (𝑓 Fn 𝑛𝜑𝜓))
bnj849.7 (𝜑′[𝑔 / 𝑓]𝜑)
bnj849.8 (𝜓′[𝑔 / 𝑓]𝜓)
bnj849.9 (𝜃′[𝑔 / 𝑓]𝜃)
bnj849.10 (𝜏 ↔ (𝑅 FrSe 𝐴𝑋𝐴))
Assertion
Ref Expression
bnj849 ((𝑅 FrSe 𝐴𝑋𝐴) → 𝐵 ∈ V)
Distinct variable groups:   𝐴,𝑓,𝑖,𝑛,𝑦   𝐵,𝑔   𝐷,𝑓,𝑔,𝑛   𝐷,𝑖   𝑅,𝑓,𝑖,𝑛,𝑦   𝑓,𝑋,𝑛   𝜒,𝑓,𝑔   𝜑,𝑔   𝜓,𝑔   𝜏,𝑔,𝑛   𝜃,𝑔
Allowed substitution hints:   𝜑(𝑦,𝑓,𝑖,𝑛)   𝜓(𝑦,𝑓,𝑖,𝑛)   𝜒(𝑦,𝑖,𝑛)   𝜃(𝑦,𝑓,𝑖,𝑛)   𝜏(𝑦,𝑓,𝑖)   𝐴(𝑔)   𝐵(𝑦,𝑓,𝑖,𝑛)   𝐷(𝑦)   𝑅(𝑔)   𝑋(𝑦,𝑔,𝑖)   𝜑′(𝑦,𝑓,𝑔,𝑖,𝑛)   𝜓′(𝑦,𝑓,𝑔,𝑖,𝑛)   𝜃′(𝑦,𝑓,𝑔,𝑖,𝑛)

Proof of Theorem bnj849
Dummy variable 𝑤 is distinct from all other variables.
StepHypRef Expression
1 bnj849.10 . 2 (𝜏 ↔ (𝑅 FrSe 𝐴𝑋𝐴))
2 bnj849.1 . . . 4 (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
3 bnj849.2 . . . 4 (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖𝑛 → (𝑓‘suc 𝑖) = 𝑦 ∈ (𝑓𝑖) pred(𝑦, 𝐴, 𝑅)))
4 bnj849.3 . . . 4 𝐷 = (ω ∖ {∅})
5 bnj849.5 . . . 4 (𝜒 ↔ (𝑅 FrSe 𝐴𝑋𝐴𝑛𝐷))
6 bnj849.6 . . . 4 (𝜃 ↔ (𝑓 Fn 𝑛𝜑𝜓))
72, 3, 4, 5, 6bnj865 33929 . . 3 𝑤𝑛(𝜒 → ∃𝑓𝑤 𝜃)
8 bnj849.4 . . . . . . . 8 𝐵 = {𝑓 ∣ ∃𝑛𝐷 (𝑓 Fn 𝑛𝜑𝜓)}
9 bnj849.7 . . . . . . . 8 (𝜑′[𝑔 / 𝑓]𝜑)
10 bnj849.8 . . . . . . . 8 (𝜓′[𝑔 / 𝑓]𝜓)
118, 9, 10bnj873 33930 . . . . . . 7 𝐵 = {𝑔 ∣ ∃𝑛𝐷 (𝑔 Fn 𝑛𝜑′𝜓′)}
12 df-rex 3071 . . . . . . . . 9 (∃𝑛𝐷 (𝑔 Fn 𝑛𝜑′𝜓′) ↔ ∃𝑛(𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′)))
13 19.29 1876 . . . . . . . . . . 11 ((∀𝑛(𝜒 → ∃𝑓𝑤 𝜃) ∧ ∃𝑛(𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) → ∃𝑛((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))))
14 an12 643 . . . . . . . . . . . . 13 (((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) ↔ (𝑛𝐷 ∧ ((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑔 Fn 𝑛𝜑′𝜓′))))
15 df-3an 1089 . . . . . . . . . . . . . . . 16 ((𝑅 FrSe 𝐴𝑋𝐴𝑛𝐷) ↔ ((𝑅 FrSe 𝐴𝑋𝐴) ∧ 𝑛𝐷))
161anbi1i 624 . . . . . . . . . . . . . . . 16 ((𝜏𝑛𝐷) ↔ ((𝑅 FrSe 𝐴𝑋𝐴) ∧ 𝑛𝐷))
1715, 5, 163bitr4i 302 . . . . . . . . . . . . . . 15 (𝜒 ↔ (𝜏𝑛𝐷))
18 id 22 . . . . . . . . . . . . . . . . 17 (𝜒𝜒)
19 bnj849.9 . . . . . . . . . . . . . . . . . . . 20 (𝜃′[𝑔 / 𝑓]𝜃)
206, 9, 10, 19bnj581 33914 . . . . . . . . . . . . . . . . . . . 20 (𝜃′ ↔ (𝑔 Fn 𝑛𝜑′𝜓′))
2119, 20bitr3i 276 . . . . . . . . . . . . . . . . . . 19 ([𝑔 / 𝑓]𝜃 ↔ (𝑔 Fn 𝑛𝜑′𝜓′))
222, 3, 4, 5, 6bnj864 33928 . . . . . . . . . . . . . . . . . . . 20 (𝜒 → ∃!𝑓𝜃)
23 df-rex 3071 . . . . . . . . . . . . . . . . . . . . 21 (∃𝑓𝑤 𝜃 ↔ ∃𝑓(𝑓𝑤𝜃))
24 exancom 1864 . . . . . . . . . . . . . . . . . . . . 21 (∃𝑓(𝑓𝑤𝜃) ↔ ∃𝑓(𝜃𝑓𝑤))
2523, 24sylbb 218 . . . . . . . . . . . . . . . . . . . 20 (∃𝑓𝑤 𝜃 → ∃𝑓(𝜃𝑓𝑤))
26 nfeu1 2582 . . . . . . . . . . . . . . . . . . . . . . 23 𝑓∃!𝑓𝜃
27 nfe1 2147 . . . . . . . . . . . . . . . . . . . . . . 23 𝑓𝑓(𝜃𝑓𝑤)
2826, 27nfan 1902 . . . . . . . . . . . . . . . . . . . . . 22 𝑓(∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤))
29 nfsbc1v 3797 . . . . . . . . . . . . . . . . . . . . . . 23 𝑓[𝑔 / 𝑓]𝜃
30 nfv 1917 . . . . . . . . . . . . . . . . . . . . . . 23 𝑓 𝑔𝑤
3129, 30nfim 1899 . . . . . . . . . . . . . . . . . . . . . 22 𝑓([𝑔 / 𝑓]𝜃𝑔𝑤)
3228, 31nfim 1899 . . . . . . . . . . . . . . . . . . . . 21 𝑓((∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤)) → ([𝑔 / 𝑓]𝜃𝑔𝑤))
33 sbceq1a 3788 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑓 = 𝑔 → (𝜃[𝑔 / 𝑓]𝜃))
34 elequ1 2113 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑓 = 𝑔 → (𝑓𝑤𝑔𝑤))
3533, 34imbi12d 344 . . . . . . . . . . . . . . . . . . . . . 22 (𝑓 = 𝑔 → ((𝜃𝑓𝑤) ↔ ([𝑔 / 𝑓]𝜃𝑔𝑤)))
3635imbi2d 340 . . . . . . . . . . . . . . . . . . . . 21 (𝑓 = 𝑔 → (((∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤)) → (𝜃𝑓𝑤)) ↔ ((∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤)) → ([𝑔 / 𝑓]𝜃𝑔𝑤))))
37 eupick 2629 . . . . . . . . . . . . . . . . . . . . 21 ((∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤)) → (𝜃𝑓𝑤))
3832, 36, 37chvarfv 2233 . . . . . . . . . . . . . . . . . . . 20 ((∃!𝑓𝜃 ∧ ∃𝑓(𝜃𝑓𝑤)) → ([𝑔 / 𝑓]𝜃𝑔𝑤))
3922, 25, 38syl2an 596 . . . . . . . . . . . . . . . . . . 19 ((𝜒 ∧ ∃𝑓𝑤 𝜃) → ([𝑔 / 𝑓]𝜃𝑔𝑤))
4021, 39biimtrrid 242 . . . . . . . . . . . . . . . . . 18 ((𝜒 ∧ ∃𝑓𝑤 𝜃) → ((𝑔 Fn 𝑛𝜑′𝜓′) → 𝑔𝑤))
4140ex 413 . . . . . . . . . . . . . . . . 17 (𝜒 → (∃𝑓𝑤 𝜃 → ((𝑔 Fn 𝑛𝜑′𝜓′) → 𝑔𝑤)))
4218, 41embantd 59 . . . . . . . . . . . . . . . 16 (𝜒 → ((𝜒 → ∃𝑓𝑤 𝜃) → ((𝑔 Fn 𝑛𝜑′𝜓′) → 𝑔𝑤)))
4342impd 411 . . . . . . . . . . . . . . 15 (𝜒 → (((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑔 Fn 𝑛𝜑′𝜓′)) → 𝑔𝑤))
4417, 43sylbir 234 . . . . . . . . . . . . . 14 ((𝜏𝑛𝐷) → (((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑔 Fn 𝑛𝜑′𝜓′)) → 𝑔𝑤))
4544expimpd 454 . . . . . . . . . . . . 13 (𝜏 → ((𝑛𝐷 ∧ ((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) → 𝑔𝑤))
4614, 45biimtrid 241 . . . . . . . . . . . 12 (𝜏 → (((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) → 𝑔𝑤))
4746exlimdv 1936 . . . . . . . . . . 11 (𝜏 → (∃𝑛((𝜒 → ∃𝑓𝑤 𝜃) ∧ (𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) → 𝑔𝑤))
4813, 47syl5 34 . . . . . . . . . 10 (𝜏 → ((∀𝑛(𝜒 → ∃𝑓𝑤 𝜃) ∧ ∃𝑛(𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′))) → 𝑔𝑤))
4948expdimp 453 . . . . . . . . 9 ((𝜏 ∧ ∀𝑛(𝜒 → ∃𝑓𝑤 𝜃)) → (∃𝑛(𝑛𝐷 ∧ (𝑔 Fn 𝑛𝜑′𝜓′)) → 𝑔𝑤))
5012, 49biimtrid 241 . . . . . . . 8 ((𝜏 ∧ ∀𝑛(𝜒 → ∃𝑓𝑤 𝜃)) → (∃𝑛𝐷 (𝑔 Fn 𝑛𝜑′𝜓′) → 𝑔𝑤))
5150abssdv 4065 . . . . . . 7 ((𝜏 ∧ ∀𝑛(𝜒 → ∃𝑓𝑤 𝜃)) → {𝑔 ∣ ∃𝑛𝐷 (𝑔 Fn 𝑛𝜑′𝜓′)} ⊆ 𝑤)
5211, 51eqsstrid 4030 . . . . . 6 ((𝜏 ∧ ∀𝑛(𝜒 → ∃𝑓𝑤 𝜃)) → 𝐵𝑤)
53 vex 3478 . . . . . . 7 𝑤 ∈ V
5453ssex 5321 . . . . . 6 (𝐵𝑤𝐵 ∈ V)
5552, 54syl 17 . . . . 5 ((𝜏 ∧ ∀𝑛(𝜒 → ∃𝑓𝑤 𝜃)) → 𝐵 ∈ V)
5655ex 413 . . . 4 (𝜏 → (∀𝑛(𝜒 → ∃𝑓𝑤 𝜃) → 𝐵 ∈ V))
5756exlimdv 1936 . . 3 (𝜏 → (∃𝑤𝑛(𝜒 → ∃𝑓𝑤 𝜃) → 𝐵 ∈ V))
587, 57mpi 20 . 2 (𝜏𝐵 ∈ V)
591, 58sylbir 234 1 ((𝑅 FrSe 𝐴𝑋𝐴) → 𝐵 ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 396  w3a 1087  wal 1539   = wceq 1541  wex 1781  wcel 2106  ∃!weu 2562  {cab 2709  wral 3061  wrex 3070  Vcvv 3474  [wsbc 3777  cdif 3945  wss 3948  c0 4322  {csn 4628   ciun 4997  suc csuc 6366   Fn wfn 6538  cfv 6543  ωcom 7854   predc-bnj14 33694   FrSe w-bnj15 33698
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-rep 5285  ax-sep 5299  ax-nul 5306  ax-pow 5363  ax-pr 5427  ax-un 7724  ax-reg 9586  ax-inf2 9635
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3or 1088  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-ral 3062  df-rex 3071  df-reu 3377  df-rab 3433  df-v 3476  df-sbc 3778  df-csb 3894  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-pss 3967  df-nul 4323  df-if 4529  df-pw 4604  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-iun 4999  df-br 5149  df-opab 5211  df-mpt 5232  df-tr 5266  df-id 5574  df-eprel 5580  df-po 5588  df-so 5589  df-fr 5631  df-we 5633  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-ima 5689  df-ord 6367  df-on 6368  df-lim 6369  df-suc 6370  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-om 7855  df-1o 8465  df-bnj17 33693  df-bnj14 33695  df-bnj13 33697  df-bnj15 33699
This theorem is referenced by:  bnj893  33934
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