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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 4188 |
. 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2188 ax-sep 4169 |
| This theorem depends on definitions: df-bi 117 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-v 2775 df-in 3176 df-ss 3183 |
| This theorem is referenced by: zfausab 4193 pp0ex 4240 ord3ex 4241 epse 4396 opabex 5820 mptexw 6210 oprabex 6225 mpoexw 6311 phplem2 6964 phpm 6976 snexxph 7066 sbthlem2 7074 2omotaplemst 7385 niex 7440 enqex 7488 enq0ex 7567 npex 7601 ltnqex 7677 gtnqex 7678 recexprlemell 7750 recexprlemelu 7751 enrex 7865 axcnex 7987 peano5nnnn 8020 reex 8074 nnex 9057 zex 9396 qex 9768 ixxex 10036 iccen 10143 serclim0 11686 climle 11715 iserabs 11856 isumshft 11871 explecnv 11886 prodfclim1 11925 prmex 12505 exmidunben 12867 prdsex 13171 prdsval 13175 fngsum 13290 igsumvalx 13291 metuex 14387 cnfldstr 14390 cnfldle 14399 znval 14468 znle 14469 znbaslemnn 14471 istopon 14555 dmtopon 14565 lmres 14790 climcncf 15126 reldvg 15221 |
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