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| Mirrors > Home > MPE Home > Th. List > tskop | Structured version Visualization version GIF version | ||
| Description: If 𝐴 and 𝐵 are members of a Tarski class, their ordered pair is also an element of the class. JFM CLASSES2 th. 4. (Contributed by FL, 22-Feb-2011.) |
| Ref | Expression |
|---|---|
| tskop | ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → 〈𝐴, 𝐵〉 ∈ 𝑇) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfopg 4830 | . . 3 ⊢ ((𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → 〈𝐴, 𝐵〉 = {{𝐴}, {𝐴, 𝐵}}) | |
| 2 | 1 | 3adant1 1144 | . 2 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → 〈𝐴, 𝐵〉 = {{𝐴}, {𝐴, 𝐵}}) |
| 3 | simp1 1150 | . . 3 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → 𝑇 ∈ Tarski) | |
| 4 | tsksn 10719 | . . . 4 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇) → {𝐴} ∈ 𝑇) | |
| 5 | 4 | 3adant3 1146 | . . 3 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → {𝐴} ∈ 𝑇) |
| 6 | tskpr 10729 | . . 3 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → {𝐴, 𝐵} ∈ 𝑇) | |
| 7 | tskpr 10729 | . . 3 ⊢ ((𝑇 ∈ Tarski ∧ {𝐴} ∈ 𝑇 ∧ {𝐴, 𝐵} ∈ 𝑇) → {{𝐴}, {𝐴, 𝐵}} ∈ 𝑇) | |
| 8 | 3, 5, 6, 7 | syl3anc 1391 | . 2 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → {{𝐴}, {𝐴, 𝐵}} ∈ 𝑇) |
| 9 | 2, 8 | eqeltrd 2863 | 1 ⊢ ((𝑇 ∈ Tarski ∧ 𝐴 ∈ 𝑇 ∧ 𝐵 ∈ 𝑇) → 〈𝐴, 𝐵〉 ∈ 𝑇) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1099 = wceq 1561 ∈ wcel 2143 {csn 4583 {cpr 4585 〈cop 4589 Tarskictsk 10707 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-inf2 9597 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6289 df-ord 6350 df-on 6351 df-lim 6352 df-suc 6353 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-ov 7400 df-om 7848 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8382 df-1o 8438 df-2o 8439 df-er 8679 df-en 8929 df-dom 8930 df-sdom 8931 df-fin 8932 df-r1 9723 df-tsk 10708 |
| This theorem is referenced by: tskxpss 10731 |
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