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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 4589 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5395 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5396 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7761 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2856 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 Vcvv 3450 ∪ cun 4149 {csn 4584 {cpr 4586 {ctp 4588 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-ss 3896 df-un 4151 df-sn 4585 df-pr 4587 df-tp 4589 df-uni 4867 |
| This theorem is used by: fr3nr 7786 en3lp 9618 prdsval 17631 imasval 17688 fnfuc 18128 fucval 18141 setcval 18257 catcval 18280 estrcval 18303 estrreslem1 18316 estrres 18318 fnxpc 18355 xpcval 18356 efmnd 19071 degenmgmopdm 19139 degenmgm 19142 degenmgm2opdm 19143 degenmgm2nfun 19144 degenmgm2 19145 cnfldex 21686 xrsex 21700 psrval 22228 om1val 25356 angmgmlem 29400 angmgmbas 29403 rlocbas 33875 rlocaddval 33876 rlocmulval 33877 idlsrgval 34081 evl1deg2 34155 signswbase 35229 signswplusg 35230 ldualset 40275 erngset 41950 erngset-rN 41958 dvaset 42155 dvhset 42231 hlhilset 43084 rabren3dioph 43915 mendval 44274 clsk1indlem4 45137 clsk1indlem1 45138 grtrimap 49139 usgrgrtrirex 49141 grlimgrtri 49194 rngcvalALTV 49455 ringcvalALTV 49479 lmod1zrnlvec 49699 mndtcval 50810 parcatid2 50856 parcatid 50857 |
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