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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 4587 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5384 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5385 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7699 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2833 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3442 ∪ cun 3901 {csn 4582 {cpr 4584 {ctp 4586 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3444 df-un 3908 df-ss 3920 df-sn 4583 df-pr 4585 df-tp 4587 df-uni 4866 |
| This theorem is referenced by: fr3nr 7727 en3lp 9535 prdsval 17387 imasval 17444 fnfuc 17884 fucval 17897 setcval 18013 catcval 18036 estrcval 18059 estrreslem1 18072 estrres 18074 fnxpc 18111 xpcval 18112 efmnd 18807 cnfldex 21324 xrsex 21351 psrval 21883 om1val 24998 rlocbas 33360 rlocaddval 33361 rlocmulval 33362 idlsrgval 33595 evl1deg2 33669 signswbase 34731 signswplusg 34732 ldualset 39495 erngset 41170 erngset-rN 41178 dvaset 41375 dvhset 41451 hlhilset 42304 rabren3dioph 43166 mendval 43530 clsk1indlem4 44394 clsk1indlem1 44395 grtrimap 48302 usgrgrtrirex 48304 grlimgrtri 48357 rngcvalALTV 48619 ringcvalALTV 48643 lmod1zrnlvec 48848 mndtcval 49932 |
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