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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 4599 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prex 5414 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
| 3 | snex 5415 | . . 3 ⊢ {𝐶} ∈ V | |
| 4 | 2, 3 | unex 7755 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
| 5 | 1, 4 | eqeltri 2862 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 Vcvv 3458 ∪ cun 3906 {csn 4594 {cpr 4596 {ctp 4598 |
| 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 2148 ax-9 2156 ax-ext 2738 ax-sep 5262 ax-pr 5409 ax-un 7745 |
| 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 2745 df-cleq 2758 df-clel 2841 df-v 3460 df-un 3913 df-ss 3925 df-sn 4595 df-pr 4597 df-tp 4599 df-uni 4878 |
| This theorem is used by: fr3nr 7780 en3lp 9593 prdsval 17533 imasval 17590 fnfuc 18030 fucval 18043 setcval 18159 catcval 18182 estrcval 18205 estrreslem1 18218 estrres 18220 fnxpc 18257 xpcval 18258 efmnd 18960 cnfldex 21562 xrsex 21576 psrval 22102 om1val 25226 rlocbas 33619 rlocaddval 33620 rlocmulval 33621 idlsrgval 33824 evl1deg2 33898 signswbase 34973 signswplusg 34974 ldualset 39940 erngset 41615 erngset-rN 41623 dvaset 41820 dvhset 41896 hlhilset 42749 rabren3dioph 43583 mendval 43947 clsk1indlem4 44811 clsk1indlem1 44812 grtrimap 48754 usgrgrtrirex 48756 grlimgrtri 48809 rngcvalALTV 49071 ringcvalALTV 49095 lmod1zrnlvec 49315 mndtcval 50398 |
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