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Theorem gchina 10455
Description: Assuming the GCH, weakly and strongly inaccessible cardinals coincide. Theorem 11.20 of [TakeutiZaring] p. 106. (Contributed by Mario Carneiro, 5-Jun-2015.)
Assertion
Ref Expression
gchina (GCH = V → Inaccw = Inacc)

Proof of Theorem gchina
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpr 485 . . . . 5 ((GCH = V ∧ 𝑥 ∈ Inaccw) → 𝑥 ∈ Inaccw)
2 idd 24 . . . . . . 7 ((GCH = V ∧ 𝑥 ∈ Inaccw) → (𝑥 ≠ ∅ → 𝑥 ≠ ∅))
3 idd 24 . . . . . . 7 ((GCH = V ∧ 𝑥 ∈ Inaccw) → ((cf‘𝑥) = 𝑥 → (cf‘𝑥) = 𝑥))
4 pwfi 8961 . . . . . . . . . . . . 13 (𝑦 ∈ Fin ↔ 𝒫 𝑦 ∈ Fin)
5 isfinite 9410 . . . . . . . . . . . . . 14 (𝒫 𝑦 ∈ Fin ↔ 𝒫 𝑦 ≺ ω)
6 winainf 10450 . . . . . . . . . . . . . . . 16 (𝑥 ∈ Inaccw → ω ⊆ 𝑥)
7 ssdomg 8786 . . . . . . . . . . . . . . . 16 (𝑥 ∈ Inaccw → (ω ⊆ 𝑥 → ω ≼ 𝑥))
86, 7mpd 15 . . . . . . . . . . . . . . 15 (𝑥 ∈ Inaccw → ω ≼ 𝑥)
9 sdomdomtr 8897 . . . . . . . . . . . . . . . 16 ((𝒫 𝑦 ≺ ω ∧ ω ≼ 𝑥) → 𝒫 𝑦𝑥)
109expcom 414 . . . . . . . . . . . . . . 15 (ω ≼ 𝑥 → (𝒫 𝑦 ≺ ω → 𝒫 𝑦𝑥))
118, 10syl 17 . . . . . . . . . . . . . 14 (𝑥 ∈ Inaccw → (𝒫 𝑦 ≺ ω → 𝒫 𝑦𝑥))
125, 11syl5bi 241 . . . . . . . . . . . . 13 (𝑥 ∈ Inaccw → (𝒫 𝑦 ∈ Fin → 𝒫 𝑦𝑥))
134, 12syl5bi 241 . . . . . . . . . . . 12 (𝑥 ∈ Inaccw → (𝑦 ∈ Fin → 𝒫 𝑦𝑥))
1413ad3antlr 728 . . . . . . . . . . 11 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → (𝑦 ∈ Fin → 𝒫 𝑦𝑥))
1514a1dd 50 . . . . . . . . . 10 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → (𝑦 ∈ Fin → (𝑦𝑧 → 𝒫 𝑦𝑥)))
16 vex 3436 . . . . . . . . . . . . . . 15 𝑦 ∈ V
17 simplll 772 . . . . . . . . . . . . . . 15 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → GCH = V)
1816, 17eleqtrrid 2846 . . . . . . . . . . . . . 14 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → 𝑦 ∈ GCH)
19 simprr 770 . . . . . . . . . . . . . 14 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → ¬ 𝑦 ∈ Fin)
20 gchinf 10413 . . . . . . . . . . . . . 14 ((𝑦 ∈ GCH ∧ ¬ 𝑦 ∈ Fin) → ω ≼ 𝑦)
2118, 19, 20syl2anc 584 . . . . . . . . . . . . 13 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → ω ≼ 𝑦)
22 vex 3436 . . . . . . . . . . . . . 14 𝑧 ∈ V
2322, 17eleqtrrid 2846 . . . . . . . . . . . . 13 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → 𝑧 ∈ GCH)
24 gchpwdom 10426 . . . . . . . . . . . . 13 ((ω ≼ 𝑦𝑦 ∈ GCH ∧ 𝑧 ∈ GCH) → (𝑦𝑧 ↔ 𝒫 𝑦𝑧))
2521, 18, 23, 24syl3anc 1370 . . . . . . . . . . . 12 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → (𝑦𝑧 ↔ 𝒫 𝑦𝑧))
26 winacard 10448 . . . . . . . . . . . . . . . . 17 (𝑥 ∈ Inaccw → (card‘𝑥) = 𝑥)
27 iscard 9733 . . . . . . . . . . . . . . . . . 18 ((card‘𝑥) = 𝑥 ↔ (𝑥 ∈ On ∧ ∀𝑧𝑥 𝑧𝑥))
2827simprbi 497 . . . . . . . . . . . . . . . . 17 ((card‘𝑥) = 𝑥 → ∀𝑧𝑥 𝑧𝑥)
2926, 28syl 17 . . . . . . . . . . . . . . . 16 (𝑥 ∈ Inaccw → ∀𝑧𝑥 𝑧𝑥)
3029ad2antlr 724 . . . . . . . . . . . . . . 15 (((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) → ∀𝑧𝑥 𝑧𝑥)
3130r19.21bi 3134 . . . . . . . . . . . . . 14 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → 𝑧𝑥)
32 domsdomtr 8899 . . . . . . . . . . . . . . 15 ((𝒫 𝑦𝑧𝑧𝑥) → 𝒫 𝑦𝑥)
3332expcom 414 . . . . . . . . . . . . . 14 (𝑧𝑥 → (𝒫 𝑦𝑧 → 𝒫 𝑦𝑥))
3431, 33syl 17 . . . . . . . . . . . . 13 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → (𝒫 𝑦𝑧 → 𝒫 𝑦𝑥))
3534adantrr 714 . . . . . . . . . . . 12 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → (𝒫 𝑦𝑧 → 𝒫 𝑦𝑥))
3625, 35sylbid 239 . . . . . . . . . . 11 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ (𝑧𝑥 ∧ ¬ 𝑦 ∈ Fin)) → (𝑦𝑧 → 𝒫 𝑦𝑥))
3736expr 457 . . . . . . . . . 10 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → (¬ 𝑦 ∈ Fin → (𝑦𝑧 → 𝒫 𝑦𝑥)))
3815, 37pm2.61d 179 . . . . . . . . 9 ((((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) ∧ 𝑧𝑥) → (𝑦𝑧 → 𝒫 𝑦𝑥))
3938rexlimdva 3213 . . . . . . . 8 (((GCH = V ∧ 𝑥 ∈ Inaccw) ∧ 𝑦𝑥) → (∃𝑧𝑥 𝑦𝑧 → 𝒫 𝑦𝑥))
4039ralimdva 3108 . . . . . . 7 ((GCH = V ∧ 𝑥 ∈ Inaccw) → (∀𝑦𝑥𝑧𝑥 𝑦𝑧 → ∀𝑦𝑥 𝒫 𝑦𝑥))
412, 3, 403anim123d 1442 . . . . . 6 ((GCH = V ∧ 𝑥 ∈ Inaccw) → ((𝑥 ≠ ∅ ∧ (cf‘𝑥) = 𝑥 ∧ ∀𝑦𝑥𝑧𝑥 𝑦𝑧) → (𝑥 ≠ ∅ ∧ (cf‘𝑥) = 𝑥 ∧ ∀𝑦𝑥 𝒫 𝑦𝑥)))
42 elwina 10442 . . . . . 6 (𝑥 ∈ Inaccw ↔ (𝑥 ≠ ∅ ∧ (cf‘𝑥) = 𝑥 ∧ ∀𝑦𝑥𝑧𝑥 𝑦𝑧))
43 elina 10443 . . . . . 6 (𝑥 ∈ Inacc ↔ (𝑥 ≠ ∅ ∧ (cf‘𝑥) = 𝑥 ∧ ∀𝑦𝑥 𝒫 𝑦𝑥))
4441, 42, 433imtr4g 296 . . . . 5 ((GCH = V ∧ 𝑥 ∈ Inaccw) → (𝑥 ∈ Inaccw𝑥 ∈ Inacc))
451, 44mpd 15 . . . 4 ((GCH = V ∧ 𝑥 ∈ Inaccw) → 𝑥 ∈ Inacc)
4645ex 413 . . 3 (GCH = V → (𝑥 ∈ Inaccw𝑥 ∈ Inacc))
47 inawina 10446 . . 3 (𝑥 ∈ Inacc → 𝑥 ∈ Inaccw)
4846, 47impbid1 224 . 2 (GCH = V → (𝑥 ∈ Inaccw𝑥 ∈ Inacc))
4948eqrdv 2736 1 (GCH = V → Inaccw = Inacc)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 205  wa 396  w3a 1086   = wceq 1539  wcel 2106  wne 2943  wral 3064  wrex 3065  Vcvv 3432  wss 3887  c0 4256  𝒫 cpw 4533   class class class wbr 5074  Oncon0 6266  cfv 6433  ωcom 7712  cdom 8731  csdm 8732  Fincfn 8733  cardccrd 9693  cfccf 9695  GCHcgch 10376  Inaccwcwina 10438  Inacccina 10439
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588  ax-inf2 9399
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-tp 4566  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-se 5545  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-isom 6442  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-supp 7978  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-seqom 8279  df-1o 8297  df-2o 8298  df-oadd 8301  df-omul 8302  df-oexp 8303  df-er 8498  df-map 8617  df-en 8734  df-dom 8735  df-sdom 8736  df-fin 8737  df-fsupp 9129  df-oi 9269  df-har 9316  df-wdom 9324  df-cnf 9420  df-dju 9659  df-card 9697  df-cf 9699  df-fin4 10043  df-gch 10377  df-wina 10440  df-ina 10441
This theorem is referenced by: (None)
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