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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 4572 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
2 | prex 5333 | . . 3 ⊢ {𝐴, 𝐵} ∈ V | |
3 | snex 5332 | . . 3 ⊢ {𝐶} ∈ V | |
4 | 2, 3 | unex 7469 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ V |
5 | 1, 4 | eqeltri 2909 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 Vcvv 3494 ∪ cun 3934 {csn 4567 {cpr 4569 {ctp 4571 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-sn 4568 df-pr 4570 df-tp 4572 df-uni 4839 |
This theorem is referenced by: fr3nr 7494 en3lp 9077 prdsval 16728 imasval 16784 fnfuc 17215 fucval 17228 setcval 17337 catcval 17356 estrcval 17374 estrreslem1 17387 estrres 17389 fnxpc 17426 xpcval 17427 efmnd 18035 psrval 20142 xrsex 20560 om1val 23634 signswbase 31824 signswplusg 31825 ldualset 36276 erngset 37951 erngset-rN 37959 dvaset 38156 dvhset 38232 hlhilset 39085 rabren3dioph 39432 mendval 39803 clsk1indlem4 40414 clsk1indlem1 40415 rngcvalALTV 44252 ringcvalALTV 44298 lmod1zrnlvec 44569 |
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