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Mirrors > Home > ILE Home > Th. List > snex | Unicode version |
Description: A singleton whose element exists is a set. (Contributed by NM, 7-Aug-1994.) (Revised by Mario Carneiro, 24-May-2019.) |
Ref | Expression |
---|---|
snex.1 |
Ref | Expression |
---|---|
snex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | snex.1 | . 2 | |
2 | snexg 3956 | . 2 | |
3 | 1, 2 | ax-mp 7 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1433 cvv 2601 csn 3398 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 |
This theorem is referenced by: snelpw 3968 rext 3970 sspwb 3971 intid 3979 euabex 3980 mss 3981 exss 3982 opi1 3987 opeqsn 4007 opeqpr 4008 uniop 4010 snnex 4199 op1stb 4227 dtruex 4302 relop 4504 funopg 4954 fo1st 5804 fo2nd 5805 ensn1 6299 xpsnen 6318 endisj 6321 xpcomco 6323 xpassen 6327 phplem2 6339 findcard2 6373 findcard2s 6374 ac6sfi 6379 nn0ex 8294 |
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