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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 4065 | . 2 |
4 | 1, 3 | ax-mp 5 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 cvv 2686 wss 3071 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 df-in 3077 df-ss 3084 |
This theorem is referenced by: zfausab 4070 pp0ex 4113 ord3ex 4114 epse 4264 opabex 5644 oprabex 6026 phplem2 6747 phpm 6759 snexxph 6838 sbthlem2 6846 niex 7120 enqex 7168 enq0ex 7247 npex 7281 ltnqex 7357 gtnqex 7358 recexprlemell 7430 recexprlemelu 7431 enrex 7545 axcnex 7667 peano5nnnn 7700 reex 7754 nnex 8726 zex 9063 qex 9424 ixxex 9682 serclim0 11074 climle 11103 iserabs 11244 isumshft 11259 explecnv 11274 prodfclim1 11313 prmex 11794 exmidunben 11939 istopon 12180 dmtopon 12190 lmres 12417 climcncf 12740 reldvg 12817 |
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