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Theorem tskord 9888
Description: A Tarski class contains all ordinals smaller than it. (Contributed by Mario Carneiro, 8-Jun-2013.)
Assertion
Ref Expression
tskord ((𝑇 ∈ Tarski ∧ 𝐴 ∈ On ∧ 𝐴𝑇) → 𝐴𝑇)

Proof of Theorem tskord
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 breq1 4844 . . . . . 6 (𝑥 = 𝑦 → (𝑥𝑇𝑦𝑇))
21anbi2d 623 . . . . 5 (𝑥 = 𝑦 → ((𝑇 ∈ Tarski ∧ 𝑥𝑇) ↔ (𝑇 ∈ Tarski ∧ 𝑦𝑇)))
3 eleq1 2864 . . . . 5 (𝑥 = 𝑦 → (𝑥𝑇𝑦𝑇))
42, 3imbi12d 336 . . . 4 (𝑥 = 𝑦 → (((𝑇 ∈ Tarski ∧ 𝑥𝑇) → 𝑥𝑇) ↔ ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇)))
5 breq1 4844 . . . . . 6 (𝑥 = 𝐴 → (𝑥𝑇𝐴𝑇))
65anbi2d 623 . . . . 5 (𝑥 = 𝐴 → ((𝑇 ∈ Tarski ∧ 𝑥𝑇) ↔ (𝑇 ∈ Tarski ∧ 𝐴𝑇)))
7 eleq1 2864 . . . . 5 (𝑥 = 𝐴 → (𝑥𝑇𝐴𝑇))
86, 7imbi12d 336 . . . 4 (𝑥 = 𝐴 → (((𝑇 ∈ Tarski ∧ 𝑥𝑇) → 𝑥𝑇) ↔ ((𝑇 ∈ Tarski ∧ 𝐴𝑇) → 𝐴𝑇)))
9 simplrl 796 . . . . . . . . 9 (((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) ∧ 𝑦𝑥) → 𝑇 ∈ Tarski)
10 onelss 5981 . . . . . . . . . . . . 13 (𝑥 ∈ On → (𝑦𝑥𝑦𝑥))
11 ssdomg 8239 . . . . . . . . . . . . 13 (𝑥 ∈ On → (𝑦𝑥𝑦𝑥))
1210, 11syld 47 . . . . . . . . . . . 12 (𝑥 ∈ On → (𝑦𝑥𝑦𝑥))
1312imp 396 . . . . . . . . . . 11 ((𝑥 ∈ On ∧ 𝑦𝑥) → 𝑦𝑥)
1413adantlr 707 . . . . . . . . . 10 (((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) ∧ 𝑦𝑥) → 𝑦𝑥)
15 simplrr 797 . . . . . . . . . 10 (((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) ∧ 𝑦𝑥) → 𝑥𝑇)
16 domsdomtr 8335 . . . . . . . . . 10 ((𝑦𝑥𝑥𝑇) → 𝑦𝑇)
1714, 15, 16syl2anc 580 . . . . . . . . 9 (((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) ∧ 𝑦𝑥) → 𝑦𝑇)
18 pm2.27 42 . . . . . . . . 9 ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → (((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → 𝑦𝑇))
199, 17, 18syl2anc 580 . . . . . . . 8 (((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) ∧ 𝑦𝑥) → (((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → 𝑦𝑇))
2019ralimdva 3141 . . . . . . 7 ((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) → (∀𝑦𝑥 ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → ∀𝑦𝑥 𝑦𝑇))
21 dfss3 3785 . . . . . . . . . . 11 (𝑥𝑇 ↔ ∀𝑦𝑥 𝑦𝑇)
22 tskssel 9865 . . . . . . . . . . . 12 ((𝑇 ∈ Tarski ∧ 𝑥𝑇𝑥𝑇) → 𝑥𝑇)
23223exp 1149 . . . . . . . . . . 11 (𝑇 ∈ Tarski → (𝑥𝑇 → (𝑥𝑇𝑥𝑇)))
2421, 23syl5bir 235 . . . . . . . . . 10 (𝑇 ∈ Tarski → (∀𝑦𝑥 𝑦𝑇 → (𝑥𝑇𝑥𝑇)))
2524com23 86 . . . . . . . . 9 (𝑇 ∈ Tarski → (𝑥𝑇 → (∀𝑦𝑥 𝑦𝑇𝑥𝑇)))
2625imp 396 . . . . . . . 8 ((𝑇 ∈ Tarski ∧ 𝑥𝑇) → (∀𝑦𝑥 𝑦𝑇𝑥𝑇))
2726adantl 474 . . . . . . 7 ((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) → (∀𝑦𝑥 𝑦𝑇𝑥𝑇))
2820, 27syld 47 . . . . . 6 ((𝑥 ∈ On ∧ (𝑇 ∈ Tarski ∧ 𝑥𝑇)) → (∀𝑦𝑥 ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → 𝑥𝑇))
2928ex 402 . . . . 5 (𝑥 ∈ On → ((𝑇 ∈ Tarski ∧ 𝑥𝑇) → (∀𝑦𝑥 ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → 𝑥𝑇)))
3029com23 86 . . . 4 (𝑥 ∈ On → (∀𝑦𝑥 ((𝑇 ∈ Tarski ∧ 𝑦𝑇) → 𝑦𝑇) → ((𝑇 ∈ Tarski ∧ 𝑥𝑇) → 𝑥𝑇)))
314, 8, 30tfis3 7289 . . 3 (𝐴 ∈ On → ((𝑇 ∈ Tarski ∧ 𝐴𝑇) → 𝐴𝑇))
32313impib 1145 . 2 ((𝐴 ∈ On ∧ 𝑇 ∈ Tarski ∧ 𝐴𝑇) → 𝐴𝑇)
33323com12 1154 1 ((𝑇 ∈ Tarski ∧ 𝐴 ∈ On ∧ 𝐴𝑇) → 𝐴𝑇)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 385  w3a 1108   = wceq 1653  wcel 2157  wral 3087  wss 3767   class class class wbr 4841  Oncon0 5939  cdom 8191  csdm 8192  Tarskictsk 9856
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2354  ax-ext 2775  ax-sep 4973  ax-nul 4981  ax-pow 5033  ax-pr 5095  ax-un 7181
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3or 1109  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2590  df-eu 2607  df-clab 2784  df-cleq 2790  df-clel 2793  df-nfc 2928  df-ne 2970  df-ral 3092  df-rex 3093  df-rab 3096  df-v 3385  df-sbc 3632  df-dif 3770  df-un 3772  df-in 3774  df-ss 3781  df-pss 3783  df-nul 4114  df-if 4276  df-pw 4349  df-sn 4367  df-pr 4369  df-tp 4371  df-op 4373  df-uni 4627  df-br 4842  df-opab 4904  df-tr 4944  df-id 5218  df-eprel 5223  df-po 5231  df-so 5232  df-fr 5269  df-we 5271  df-xp 5316  df-rel 5317  df-cnv 5318  df-co 5319  df-dm 5320  df-rn 5321  df-res 5322  df-ima 5323  df-ord 5942  df-on 5943  df-fun 6101  df-fn 6102  df-f 6103  df-f1 6104  df-fo 6105  df-f1o 6106  df-er 7980  df-en 8194  df-dom 8195  df-sdom 8196  df-tsk 9857
This theorem is referenced by:  tskcard  9889
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