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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 4299 |
. 2
| |
| 3 | 1, 2 | ax-mp 5 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-in 3219 df-ss 3226 df-pw 3673 df-sn 3697 |
| This theorem is referenced by: snelpw 4330 rext 4333 sspwb 4334 intid 4342 euabex 4343 mss 4344 exss 4345 opi1 4350 opeqsn 4371 opeqpr 4372 uniop 4374 snnex 4571 op1stb 4601 dtruex 4683 relop 4907 funopg 5388 funopsn 5862 fo1st 6353 fo2nd 6354 mapsn 6927 mapsnconst 6931 mapsncnv 6932 mapsnf1o2 6933 elixpsn 6972 ixpsnf1o 6973 ensn1 7038 mapsnen 7055 dom1o 7071 xpsnen 7074 endisj 7077 xpcomco 7079 xpassen 7083 phplem2 7109 findcard2 7148 findcard2s 7149 ac6sfi 7157 xpfi 7194 mapfi 7216 djuex 7336 0ct 7400 finomni 7433 exmidfodomrlemim 7506 djuassen 7526 cc2lem 7582 nn0ex 9504 xnn0nnen 10803 fxnn0nninf 10805 inftonninf 10808 hashxp 11195 nninfct 12741 fngsum 13618 znval 14801 fnpsr 14832 reldvg 15561 plyval 15614 elply2 15617 plyss 15620 plyco 15641 plycj 15643 |
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