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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 4592 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5407 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5408 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7750 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2858 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 Vcvv 3453 ∪ cun 3900 {csn 4587 {cpr 4589 {ctp 4591 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pr 5402 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-v 3455 df-un 3907 df-ss 3919 df-sn 4588 df-pr 4590 df-tp 4592 df-uni 4871 |
| This theorem is used by: fr3nr 7775 en3lp 9597 prdsval 17546 imasval 17603 fnfuc 18043 fucval 18056 setcval 18172 catcval 18195 estrcval 18218 estrreslem1 18231 estrres 18233 fnxpc 18270 xpcval 18271 efmnd 18985 degenmgmopdm 19053 degenmgm 19056 degenmgm2opdm 19057 degenmgm2nfun 19058 degenmgm2 19059 cnfldex 21594 xrsex 21608 psrval 22136 om1val 25264 angmgmlem 29282 angmgmbas 29285 rlocbas 33716 rlocaddval 33717 rlocmulval 33718 idlsrgval 33921 evl1deg2 33995 signswbase 35070 signswplusg 35071 ldualset 40006 erngset 41681 erngset-rN 41689 dvaset 41886 dvhset 41962 hlhilset 42815 rabren3dioph 43664 mendval 44028 clsk1indlem4 44892 clsk1indlem1 44893 grtrimap 48872 usgrgrtrirex 48874 grlimgrtri 48927 rngcvalALTV 49188 ringcvalALTV 49212 lmod1zrnlvec 49432 mndtcval 50513 |
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