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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 5396 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5397 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7750 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2857 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 Vcvv 3451 ∪ cun 3897 {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 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-pr 5391 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 2740 df-cleq 2753 df-clel 2836 df-v 3453 df-un 3904 df-ss 3916 df-sn 4585 df-pr 4587 df-tp 4589 df-uni 4868 |
| This theorem is used by: fr3nr 7775 en3lp 9599 prdsval 17606 imasval 17663 fnfuc 18103 fucval 18116 setcval 18232 catcval 18255 estrcval 18278 estrreslem1 18291 estrres 18293 fnxpc 18330 xpcval 18331 efmnd 19046 degenmgmopdm 19114 degenmgm 19117 degenmgm2opdm 19118 degenmgm2nfun 19119 degenmgm2 19120 cnfldex 21661 xrsex 21675 psrval 22203 om1val 25331 angmgmlem 29377 angmgmbas 29380 rlocbas 33811 rlocaddval 33812 rlocmulval 33813 idlsrgval 34017 evl1deg2 34091 signswbase 35166 signswplusg 35167 ldualset 40150 erngset 41825 erngset-rN 41833 dvaset 42030 dvhset 42106 hlhilset 42959 rabren3dioph 43775 mendval 44139 clsk1indlem4 45003 clsk1indlem1 45004 grtrimap 48990 usgrgrtrirex 48992 grlimgrtri 49045 rngcvalALTV 49306 ringcvalALTV 49330 lmod1zrnlvec 49550 mndtcval 50631 |
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