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Theorem omsindsOLD 7820
Description: Obsolete version of omsinds 7819 as of 16-Oct-2024. (Contributed by Scott Fenton, 17-Jul-2015.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypotheses
Ref Expression
omsinds.1 (𝑥 = 𝑦 → (𝜑𝜓))
omsinds.2 (𝑥 = 𝐴 → (𝜑𝜒))
omsinds.3 (𝑥 ∈ ω → (∀𝑦𝑥 𝜓𝜑))
Assertion
Ref Expression
omsindsOLD (𝐴 ∈ ω → 𝜒)
Distinct variable groups:   𝑥,𝐴   𝜒,𝑥   𝜑,𝑦   𝜓,𝑥   𝑥,𝑦
Allowed substitution hints:   𝜑(𝑥)   𝜓(𝑦)   𝜒(𝑦)   𝐴(𝑦)

Proof of Theorem omsindsOLD
StepHypRef Expression
1 omsson 7802 . . 3 ω ⊆ On
2 epweon 7705 . . 3 E We On
3 wess 5618 . . 3 (ω ⊆ On → ( E We On → E We ω))
41, 2, 3mp2 9 . 2 E We ω
5 epse 5614 . 2 E Se ω
6 omsinds.1 . 2 (𝑥 = 𝑦 → (𝜑𝜓))
7 omsinds.2 . 2 (𝑥 = 𝐴 → (𝜑𝜒))
8 predep 6282 . . . . 5 (𝑥 ∈ ω → Pred( E , ω, 𝑥) = (ω ∩ 𝑥))
9 ordom 7808 . . . . . . 7 Ord ω
10 ordtr 6329 . . . . . . 7 (Ord ω → Tr ω)
11 trss 5231 . . . . . . 7 (Tr ω → (𝑥 ∈ ω → 𝑥 ⊆ ω))
129, 10, 11mp2b 10 . . . . . 6 (𝑥 ∈ ω → 𝑥 ⊆ ω)
13 sseqin2 4173 . . . . . 6 (𝑥 ⊆ ω ↔ (ω ∩ 𝑥) = 𝑥)
1412, 13sylib 217 . . . . 5 (𝑥 ∈ ω → (ω ∩ 𝑥) = 𝑥)
158, 14eqtrd 2776 . . . 4 (𝑥 ∈ ω → Pred( E , ω, 𝑥) = 𝑥)
1615raleqdv 3311 . . 3 (𝑥 ∈ ω → (∀𝑦 ∈ Pred ( E , ω, 𝑥)𝜓 ↔ ∀𝑦𝑥 𝜓))
17 omsinds.3 . . 3 (𝑥 ∈ ω → (∀𝑦𝑥 𝜓𝜑))
1816, 17sylbid 239 . 2 (𝑥 ∈ ω → (∀𝑦 ∈ Pred ( E , ω, 𝑥)𝜓𝜑))
194, 5, 6, 7, 18wfis3 6313 1 (𝐴 ∈ ω → 𝜒)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205   = wceq 1541  wcel 2106  wral 3062  cin 3907  wss 3908  Tr wtr 5220   E cep 5534   We wwe 5585  Predcpred 6250  Ord word 6314  Oncon0 6315  ωcom 7798
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 2707  ax-sep 5254  ax-nul 5261  ax-pr 5382
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-clab 2714  df-cleq 2728  df-clel 2814  df-nfc 2887  df-ne 2942  df-ral 3063  df-rex 3072  df-rab 3406  df-v 3445  df-sbc 3738  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-pss 3927  df-nul 4281  df-if 4485  df-pw 4560  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4864  df-br 5104  df-opab 5166  df-tr 5221  df-eprel 5535  df-po 5543  df-so 5544  df-fr 5586  df-se 5587  df-we 5588  df-xp 5637  df-rel 5638  df-cnv 5639  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6251  df-ord 6318  df-on 6319  df-lim 6320  df-om 7799
This theorem is referenced by: (None)
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