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| Mirrors > Home > ILE Home > Th. List > vsnid | Unicode version | ||
| Description: A setvar variable is a member of its singleton (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| vsnid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2818 |
. 2
| |
| 2 | 1 | snid 3725 |
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-ext 2216 |
| 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-sn 3700 |
| This theorem is referenced by: rext 4336 snnex 4574 dtruex 4686 fnressn 5875 fressnfv 5876 mapsnd 6936 findcard2d 7161 findcard2sd 7162 diffifi 7164 ac6sfi 7168 elssdc 7175 eqsndc 7176 fisseneq 7208 finomni 7444 cc2lem 7596 hashfibclem 11231 modfsummodlem1 12167 gfsumz 14109 gfsumcl 14110 txdis 15268 txdis1cn 15269 |
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