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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 4590 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5400 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5401 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7731 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2861 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2145 Vcvv 3457 ∪ cun 3905 {csn 4585 {cpr 4587 {ctp 4589 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 ax-sep 5251 ax-pr 5395 ax-un 7722 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-tru 1566 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-v 3459 df-un 3912 df-ss 3924 df-sn 4586 df-pr 4588 df-tp 4590 df-uni 4869 |
| This theorem is referenced by: fr3nr 7759 en3lp 9571 prdsval 17498 imasval 17555 fnfuc 17995 fucval 18008 setcval 18124 catcval 18147 estrcval 18170 estrreslem1 18183 estrres 18185 fnxpc 18222 xpcval 18223 efmnd 18919 cnfldex 21485 xrsex 21499 psrval 22025 om1val 25150 rlocbas 33501 rlocaddval 33502 rlocmulval 33503 idlsrgval 33710 evl1deg2 33784 signswbase 34858 signswplusg 34859 ldualset 39761 erngset 41436 erngset-rN 41444 dvaset 41641 dvhset 41717 hlhilset 42570 rabren3dioph 43404 mendval 43768 clsk1indlem4 44632 clsk1indlem1 44633 grtrimap 48568 usgrgrtrirex 48570 grlimgrtri 48623 rngcvalALTV 48885 ringcvalALTV 48909 lmod1zrnlvec 49125 mndtcval 50208 |
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