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| Mirrors > Home > ILE Home > Th. List > ssexi | Unicode version | ||
| Description: The subset of a set is also a set. (Contributed by NM, 9-Sep-1993.) |
| Ref | Expression |
|---|---|
| ssexi.1 |
|
| ssexi.2 |
|
| Ref | Expression |
|---|---|
| ssexi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssexi.2 |
. 2
| |
| 2 | ssexi.1 |
. . 3
| |
| 3 | 2 | ssex 4231 |
. 2
|
| 4 | 1, 3 | 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-ext 2213 ax-sep 4212 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-in 3207 df-ss 3214 |
| This theorem is referenced by: zfausab 4237 pp0ex 4285 ord3ex 4286 epse 4445 opabex 5888 mptexw 6284 oprabex 6299 mpoexw 6387 phplem2 7082 phpm 7095 snexxph 7192 sbthlem2 7200 2omotaplemst 7537 niex 7592 enqex 7640 enq0ex 7719 npex 7753 ltnqex 7829 gtnqex 7830 recexprlemell 7902 recexprlemelu 7903 enrex 8017 axcnex 8139 peano5nnnn 8172 reex 8226 nnex 9208 zex 9549 qex 9927 ixxex 10195 iccen 10303 serclim0 11945 climle 11974 iserabs 12116 isumshft 12131 explecnv 12146 prodfclim1 12185 prmex 12765 exmidunben 13127 prdsex 13432 prdsval 13436 fngsum 13551 igsumvalx 13552 metuex 14651 cnfldstr 14654 cnfldle 14663 znval 14732 znle 14733 znbaslemnn 14735 istopon 14824 dmtopon 14834 lmres 15059 climcncf 15395 reldvg 15490 pellexlem3 15793 |
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