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Theorem omsindsOLD 7909
Description: Obsolete version of omsinds 7908 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 7891 . . 3 ω ⊆ On
2 epweon 7794 . . 3 E We On
3 wess 5675 . . 3 (ω ⊆ On → ( E We On → E We ω))
41, 2, 3mp2 9 . 2 E We ω
5 epse 5671 . 2 E Se ω
6 omsinds.1 . 2 (𝑥 = 𝑦 → (𝜑𝜓))
7 omsinds.2 . 2 (𝑥 = 𝐴 → (𝜑𝜒))
8 predep 6353 . . . . 5 (𝑥 ∈ ω → Pred( E , ω, 𝑥) = (ω ∩ 𝑥))
9 ordom 7897 . . . . . . 7 Ord ω
10 ordtr 6400 . . . . . . 7 (Ord ω → Tr ω)
11 trss 5276 . . . . . . 7 (Tr ω → (𝑥 ∈ ω → 𝑥 ⊆ ω))
129, 10, 11mp2b 10 . . . . . 6 (𝑥 ∈ ω → 𝑥 ⊆ ω)
13 sseqin2 4231 . . . . . 6 (𝑥 ⊆ ω ↔ (ω ∩ 𝑥) = 𝑥)
1412, 13sylib 218 . . . . 5 (𝑥 ∈ ω → (ω ∩ 𝑥) = 𝑥)
158, 14eqtrd 2775 . . . 4 (𝑥 ∈ ω → Pred( E , ω, 𝑥) = 𝑥)
1615raleqdv 3324 . . 3 (𝑥 ∈ ω → (∀𝑦 ∈ Pred ( E , ω, 𝑥)𝜓 ↔ ∀𝑦𝑥 𝜓))
17 omsinds.3 . . 3 (𝑥 ∈ ω → (∀𝑦𝑥 𝜓𝜑))
1816, 17sylbid 240 . 2 (𝑥 ∈ ω → (∀𝑦 ∈ Pred ( E , ω, 𝑥)𝜓𝜑))
194, 5, 6, 7, 18wfis3 6384 1 (𝐴 ∈ ω → 𝜒)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 206   = wceq 1537  wcel 2106  wral 3059  cin 3962  wss 3963  Tr wtr 5265   E cep 5588   We wwe 5640  Predcpred 6322  Ord word 6385  Oncon0 6386  ωcom 7887
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pr 5438
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-sbc 3792  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-pss 3983  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-tr 5266  df-eprel 5589  df-po 5597  df-so 5598  df-fr 5641  df-se 5642  df-we 5643  df-xp 5695  df-rel 5696  df-cnv 5697  df-dm 5699  df-rn 5700  df-res 5701  df-ima 5702  df-pred 6323  df-ord 6389  df-on 6390  df-lim 6391  df-om 7888
This theorem is referenced by: (None)
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