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Mirrors > Home > MPE Home > Th. List > tpex | Structured version Visualization version GIF version |
Description: An unordered triple of classes exists. (Contributed by NM, 10-Apr-1994.) |
Ref | Expression |
---|---|
tpex | ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-tp 4591 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
2 | prex 5389 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
3 | snex 5388 | . . 3 ⊢ {𝐶} ∈ V | |
4 | 2, 3 | unex 7679 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
5 | 1, 4 | eqeltri 2834 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 Vcvv 3445 ∪ cun 3908 {csn 4586 {cpr 4588 {ctp 4590 |
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-ext 2707 ax-sep 5256 ax-nul 5263 ax-pr 5384 ax-un 7671 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-tru 1544 df-fal 1554 df-ex 1782 df-sb 2068 df-clab 2714 df-cleq 2728 df-clel 2814 df-v 3447 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-nul 4283 df-sn 4587 df-pr 4589 df-tp 4591 df-uni 4866 |
This theorem is referenced by: fr3nr 7705 en3lp 9549 prdsval 17336 imasval 17392 fnfuc 17831 fucval 17845 setcval 17962 catcval 17985 estrcval 18010 estrreslem1 18023 estrreslem1OLD 18024 estrres 18026 fnxpc 18063 xpcval 18064 efmnd 18679 xrsex 20810 psrval 21315 om1val 24391 idlsrgval 32185 signswbase 33106 signswplusg 33107 ldualset 37577 erngset 39253 erngset-rN 39261 dvaset 39458 dvhset 39534 hlhilset 40387 rabren3dioph 41115 mendval 41487 clsk1indlem4 42297 clsk1indlem1 42298 rngcvalALTV 46230 ringcvalALTV 46276 lmod1zrnlvec 46546 mndtcval 47076 |
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