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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 4593 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5400 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5401 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7785 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2860 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 Vcvv 3454 ∪ cun 4152 {csn 4588 {cpr 4590 {ctp 4592 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5252 ax-pr 5395 ax-un 7775 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-v 3456 df-ss 3901 df-un 4154 df-sn 4589 df-pr 4591 df-tp 4593 df-uni 4871 |
| This theorem is used by: fr3nr 7810 en3lp 9642 prdsval 17655 imasval 17712 fnfuc 18152 fucval 18165 setcval 18281 catcval 18304 estrcval 18327 estrreslem1 18340 estrres 18342 fnxpc 18379 xpcval 18380 efmnd 19095 degenmgmopdm 19163 degenmgm 19166 degenmgm2opdm 19167 degenmgm2nfun 19168 degenmgm2 19169 cnfldex 21711 xrsex 21725 psrval 22253 om1val 25381 angmgmlem 29425 angmgmbas 29428 rlocbas 33899 rlocaddval 33900 rlocmulval 33901 idlsrgval 34105 evl1deg2 34179 signswbase 35253 signswplusg 35254 ldualset 40374 erngset 42049 erngset-rN 42057 dvaset 42254 dvhset 42330 hlhilset 43183 rabren3dioph 44015 mendval 44373 clsk1indlem4 45236 clsk1indlem1 45237 grtrimap 49251 usgrgrtrirex 49253 grlimgrtri 49306 rngcvalALTV 49567 ringcvalALTV 49591 lmod1zrnlvec 49811 mndtcval 50922 parcatid2 50968 parcatid 50969 |
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