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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 4585 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5382 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5381 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7689 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 Vcvv 3440 ∪ cun 3899 {csn 4580 {cpr 4582 {ctp 4584 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-sn 4581 df-pr 4583 df-tp 4585 df-uni 4864 |
| This theorem is referenced by: fr3nr 7717 en3lp 9523 prdsval 17375 imasval 17432 fnfuc 17872 fucval 17885 setcval 18001 catcval 18024 estrcval 18047 estrreslem1 18060 estrres 18062 fnxpc 18099 xpcval 18100 efmnd 18795 cnfldex 21312 xrsex 21339 psrval 21871 om1val 24986 rlocbas 33349 rlocaddval 33350 rlocmulval 33351 idlsrgval 33584 evl1deg2 33658 signswbase 34711 signswplusg 34712 ldualset 39381 erngset 41056 erngset-rN 41064 dvaset 41261 dvhset 41337 hlhilset 42190 rabren3dioph 43053 mendval 43417 clsk1indlem4 44281 clsk1indlem1 44282 grtrimap 48190 usgrgrtrirex 48192 grlimgrtri 48245 rngcvalALTV 48507 ringcvalALTV 48531 lmod1zrnlvec 48736 mndtcval 49820 |
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