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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 4221 |
. 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-sep 4202 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2801 df-in 3203 df-ss 3210 |
| This theorem is referenced by: zfausab 4226 pp0ex 4273 ord3ex 4274 epse 4433 opabex 5867 mptexw 6264 oprabex 6279 mpoexw 6365 phplem2 7022 phpm 7035 snexxph 7128 sbthlem2 7136 2omotaplemst 7455 niex 7510 enqex 7558 enq0ex 7637 npex 7671 ltnqex 7747 gtnqex 7748 recexprlemell 7820 recexprlemelu 7821 enrex 7935 axcnex 8057 peano5nnnn 8090 reex 8144 nnex 9127 zex 9466 qex 9839 ixxex 10107 iccen 10214 serclim0 11832 climle 11861 iserabs 12002 isumshft 12017 explecnv 12032 prodfclim1 12071 prmex 12651 exmidunben 13013 prdsex 13318 prdsval 13322 fngsum 13437 igsumvalx 13438 metuex 14535 cnfldstr 14538 cnfldle 14547 znval 14616 znle 14617 znbaslemnn 14619 istopon 14703 dmtopon 14713 lmres 14938 climcncf 15274 reldvg 15369 |
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