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Theorem isf32lem9 9777
Description: Lemma for isfin3-2 9783. Construction of the onto function. (Contributed by Stefan O'Rear, 5-Nov-2014.) (Revised by Mario Carneiro, 2-Oct-2015.)
Hypotheses
Ref Expression
isf32lem.a (𝜑𝐹:ω⟶𝒫 𝐺)
isf32lem.b (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹𝑥))
isf32lem.c (𝜑 → ¬ ran 𝐹 ∈ ran 𝐹)
isf32lem.d 𝑆 = {𝑦 ∈ ω ∣ (𝐹‘suc 𝑦) ⊊ (𝐹𝑦)}
isf32lem.e 𝐽 = (𝑢 ∈ ω ↦ (𝑣𝑆 (𝑣𝑆) ≈ 𝑢))
isf32lem.f 𝐾 = ((𝑤𝑆 ↦ ((𝐹𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)
isf32lem.g 𝐿 = (𝑡𝐺 ↦ (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))))
Assertion
Ref Expression
isf32lem9 (𝜑𝐿:𝐺onto→ω)
Distinct variable groups:   𝑥,𝑤   𝑡,𝐺   𝑥,𝐿   𝑡,𝑠,𝑢,𝑣,𝑤,𝑥,𝑦,𝜑   𝑤,𝐹,𝑥,𝑦   𝑆,𝑠,𝑡,𝑢,𝑣,𝑤,𝑥,𝑦   𝐽,𝑠,𝑡,𝑤,𝑥,𝑦   𝐾,𝑠,𝑡,𝑥,𝑦
Allowed substitution hints:   𝐹(𝑣,𝑢,𝑡,𝑠)   𝐺(𝑥,𝑦,𝑤,𝑣,𝑢,𝑠)   𝐽(𝑣,𝑢)   𝐾(𝑤,𝑣,𝑢)   𝐿(𝑦,𝑤,𝑣,𝑢,𝑡,𝑠)

Proof of Theorem isf32lem9
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 isf32lem.g . . . 4 𝐿 = (𝑡𝐺 ↦ (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))))
2 ssab2 4059 . . . . . . 7 {𝑠 ∣ (𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))} ⊆ ω
3 iotacl 6340 . . . . . . 7 (∃!𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠)) → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ {𝑠 ∣ (𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))})
42, 3sseldi 3969 . . . . . 6 (∃!𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠)) → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ ω)
5 iotanul 6332 . . . . . . 7 (¬ ∃!𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠)) → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) = ∅)
6 peano1 7594 . . . . . . 7 ∅ ∈ ω
75, 6syl6eqel 2926 . . . . . 6 (¬ ∃!𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠)) → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ ω)
84, 7pm2.61i 183 . . . . 5 (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ ω
98a1i 11 . . . 4 (𝑡𝐺 → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ ω)
101, 9fmpti 6874 . . 3 𝐿:𝐺⟶ω
1110a1i 11 . 2 (𝜑𝐿:𝐺⟶ω)
12 isf32lem.a . . . . . 6 (𝜑𝐹:ω⟶𝒫 𝐺)
13 isf32lem.b . . . . . 6 (𝜑 → ∀𝑥 ∈ ω (𝐹‘suc 𝑥) ⊆ (𝐹𝑥))
14 isf32lem.c . . . . . 6 (𝜑 → ¬ ran 𝐹 ∈ ran 𝐹)
15 isf32lem.d . . . . . 6 𝑆 = {𝑦 ∈ ω ∣ (𝐹‘suc 𝑦) ⊊ (𝐹𝑦)}
16 isf32lem.e . . . . . 6 𝐽 = (𝑢 ∈ ω ↦ (𝑣𝑆 (𝑣𝑆) ≈ 𝑢))
17 isf32lem.f . . . . . 6 𝐾 = ((𝑤𝑆 ↦ ((𝐹𝑤) ∖ (𝐹‘suc 𝑤))) ∘ 𝐽)
1812, 13, 14, 15, 16, 17isf32lem6 9774 . . . . 5 ((𝜑𝑎 ∈ ω) → (𝐾𝑎) ≠ ∅)
19 n0 4314 . . . . 5 ((𝐾𝑎) ≠ ∅ ↔ ∃𝑏 𝑏 ∈ (𝐾𝑎))
2018, 19sylib 219 . . . 4 ((𝜑𝑎 ∈ ω) → ∃𝑏 𝑏 ∈ (𝐾𝑎))
2112, 13, 14, 15, 16, 17isf32lem8 9776 . . . . . . . . 9 ((𝜑𝑎 ∈ ω) → (𝐾𝑎) ⊆ 𝐺)
2221sselda 3971 . . . . . . . 8 (((𝜑𝑎 ∈ ω) ∧ 𝑏 ∈ (𝐾𝑎)) → 𝑏𝐺)
23 eleq1w 2900 . . . . . . . . . . . . 13 (𝑡 = 𝑏 → (𝑡 ∈ (𝐾𝑠) ↔ 𝑏 ∈ (𝐾𝑠)))
2423anbi2d 628 . . . . . . . . . . . 12 (𝑡 = 𝑏 → ((𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠)) ↔ (𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
2524iotabidv 6338 . . . . . . . . . . 11 (𝑡 = 𝑏 → (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) = (℩𝑠(𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
26 iotaex 6334 . . . . . . . . . . 11 (℩𝑠(𝑠 ∈ ω ∧ 𝑡 ∈ (𝐾𝑠))) ∈ V
2725, 1, 26fvmpt3i 6772 . . . . . . . . . 10 (𝑏𝐺 → (𝐿𝑏) = (℩𝑠(𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
2822, 27syl 17 . . . . . . . . 9 (((𝜑𝑎 ∈ ω) ∧ 𝑏 ∈ (𝐾𝑎)) → (𝐿𝑏) = (℩𝑠(𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
29 simp1r 1192 . . . . . . . . . . . . . . . 16 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω ∧ 𝑠 ∈ ω) → 𝑏 ∈ (𝐾𝑎))
30 simpl1 1185 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → 𝜑)
31 simpr 485 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → 𝑠𝑎)
3231necomd 3076 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → 𝑎𝑠)
33 simpl2 1186 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → 𝑎 ∈ ω)
34 simpl3 1187 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → 𝑠 ∈ ω)
3512, 13, 14, 15, 16, 17isf32lem7 9775 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑𝑎𝑠) ∧ (𝑎 ∈ ω ∧ 𝑠 ∈ ω)) → ((𝐾𝑎) ∩ (𝐾𝑠)) = ∅)
3630, 32, 33, 34, 35syl22anc 836 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → ((𝐾𝑎) ∩ (𝐾𝑠)) = ∅)
37 disj1 4404 . . . . . . . . . . . . . . . . . . . . 21 (((𝐾𝑎) ∩ (𝐾𝑠)) = ∅ ↔ ∀𝑏(𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠)))
3836, 37sylib 219 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) ∧ 𝑠𝑎) → ∀𝑏(𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠)))
3938ex 413 . . . . . . . . . . . . . . . . . . 19 ((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑠𝑎 → ∀𝑏(𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠))))
40 sp 2174 . . . . . . . . . . . . . . . . . . 19 (∀𝑏(𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠)) → (𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠)))
4139, 40syl6 35 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑠𝑎 → (𝑏 ∈ (𝐾𝑎) → ¬ 𝑏 ∈ (𝐾𝑠))))
4241com23 86 . . . . . . . . . . . . . . . . 17 ((𝜑𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑏 ∈ (𝐾𝑎) → (𝑠𝑎 → ¬ 𝑏 ∈ (𝐾𝑠))))
43423adant1r 1171 . . . . . . . . . . . . . . . 16 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑏 ∈ (𝐾𝑎) → (𝑠𝑎 → ¬ 𝑏 ∈ (𝐾𝑠))))
4429, 43mpd 15 . . . . . . . . . . . . . . 15 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑠𝑎 → ¬ 𝑏 ∈ (𝐾𝑠)))
4544necon4ad 3040 . . . . . . . . . . . . . 14 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω ∧ 𝑠 ∈ ω) → (𝑏 ∈ (𝐾𝑠) → 𝑠 = 𝑎))
46453expia 1115 . . . . . . . . . . . . 13 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω) → (𝑠 ∈ ω → (𝑏 ∈ (𝐾𝑠) → 𝑠 = 𝑎)))
4746impd 411 . . . . . . . . . . . 12 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω) → ((𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠)) → 𝑠 = 𝑎))
48 eleq1w 2900 . . . . . . . . . . . . . . . 16 (𝑠 = 𝑎 → (𝑠 ∈ ω ↔ 𝑎 ∈ ω))
49 fveq2 6669 . . . . . . . . . . . . . . . . 17 (𝑠 = 𝑎 → (𝐾𝑠) = (𝐾𝑎))
5049eleq2d 2903 . . . . . . . . . . . . . . . 16 (𝑠 = 𝑎 → (𝑏 ∈ (𝐾𝑠) ↔ 𝑏 ∈ (𝐾𝑎)))
5148, 50anbi12d 630 . . . . . . . . . . . . . . 15 (𝑠 = 𝑎 → ((𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠)) ↔ (𝑎 ∈ ω ∧ 𝑏 ∈ (𝐾𝑎))))
5251biimprcd 251 . . . . . . . . . . . . . 14 ((𝑎 ∈ ω ∧ 𝑏 ∈ (𝐾𝑎)) → (𝑠 = 𝑎 → (𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
5352ancoms 459 . . . . . . . . . . . . 13 ((𝑏 ∈ (𝐾𝑎) ∧ 𝑎 ∈ ω) → (𝑠 = 𝑎 → (𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
5453adantll 710 . . . . . . . . . . . 12 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω) → (𝑠 = 𝑎 → (𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))))
5547, 54impbid 213 . . . . . . . . . . 11 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω) → ((𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠)) ↔ 𝑠 = 𝑎))
5655iota5 6337 . . . . . . . . . 10 (((𝜑𝑏 ∈ (𝐾𝑎)) ∧ 𝑎 ∈ ω) → (℩𝑠(𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))) = 𝑎)
5756an32s 648 . . . . . . . . 9 (((𝜑𝑎 ∈ ω) ∧ 𝑏 ∈ (𝐾𝑎)) → (℩𝑠(𝑠 ∈ ω ∧ 𝑏 ∈ (𝐾𝑠))) = 𝑎)
5828, 57eqtr2d 2862 . . . . . . . 8 (((𝜑𝑎 ∈ ω) ∧ 𝑏 ∈ (𝐾𝑎)) → 𝑎 = (𝐿𝑏))
5922, 58jca 512 . . . . . . 7 (((𝜑𝑎 ∈ ω) ∧ 𝑏 ∈ (𝐾𝑎)) → (𝑏𝐺𝑎 = (𝐿𝑏)))
6059ex 413 . . . . . 6 ((𝜑𝑎 ∈ ω) → (𝑏 ∈ (𝐾𝑎) → (𝑏𝐺𝑎 = (𝐿𝑏))))
6160eximdv 1911 . . . . 5 ((𝜑𝑎 ∈ ω) → (∃𝑏 𝑏 ∈ (𝐾𝑎) → ∃𝑏(𝑏𝐺𝑎 = (𝐿𝑏))))
62 df-rex 3149 . . . . 5 (∃𝑏𝐺 𝑎 = (𝐿𝑏) ↔ ∃𝑏(𝑏𝐺𝑎 = (𝐿𝑏)))
6361, 62syl6ibr 253 . . . 4 ((𝜑𝑎 ∈ ω) → (∃𝑏 𝑏 ∈ (𝐾𝑎) → ∃𝑏𝐺 𝑎 = (𝐿𝑏)))
6420, 63mpd 15 . . 3 ((𝜑𝑎 ∈ ω) → ∃𝑏𝐺 𝑎 = (𝐿𝑏))
6564ralrimiva 3187 . 2 (𝜑 → ∀𝑎 ∈ ω ∃𝑏𝐺 𝑎 = (𝐿𝑏))
66 dffo3 6866 . 2 (𝐿:𝐺onto→ω ↔ (𝐿:𝐺⟶ω ∧ ∀𝑎 ∈ ω ∃𝑏𝐺 𝑎 = (𝐿𝑏)))
6711, 65, 66sylanbrc 583 1 (𝜑𝐿:𝐺onto→ω)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 396  w3a 1081  wal 1528   = wceq 1530  wex 1773  wcel 2107  ∃!weu 2651  {cab 2804  wne 3021  wral 3143  wrex 3144  {crab 3147  cdif 3937  cin 3939  wss 3940  wpss 3941  c0 4295  𝒫 cpw 4542   cint 4874   class class class wbr 5063  cmpt 5143  ran crn 5555  ccom 5558  suc csuc 6192  cio 6311  wf 6350  ontowfo 6352  cfv 6354  crio 7107  ωcom 7573  cen 8500
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2798  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326  ax-un 7455
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ne 3022  df-ral 3148  df-rex 3149  df-reu 3150  df-rmo 3151  df-rab 3152  df-v 3502  df-sbc 3777  df-csb 3888  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-pss 3958  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4838  df-int 4875  df-iun 4919  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5459  df-eprel 5464  df-po 5473  df-so 5474  df-fr 5513  df-se 5514  df-we 5515  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-pred 6147  df-ord 6193  df-on 6194  df-lim 6195  df-suc 6196  df-iota 6313  df-fun 6356  df-fn 6357  df-f 6358  df-f1 6359  df-fo 6360  df-f1o 6361  df-fv 6362  df-isom 6363  df-riota 7108  df-om 7574  df-wrecs 7943  df-recs 8004  df-1o 8098  df-er 8284  df-en 8504  df-dom 8505  df-sdom 8506  df-fin 8507  df-card 9362
This theorem is referenced by:  isf32lem10  9778
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