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| Mirrors > Home > ILE Home > Th. List > nnsscn | Unicode version | ||
| Description: The positive integers are a subset of the complex numbers. (Contributed by NM, 2-Aug-2004.) |
| Ref | Expression |
|---|---|
| nnsscn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnssre 9261 |
. 2
| |
| 2 | ax-resscn 8235 |
. 2
| |
| 3 | 1, 2 | sstri 3251 |
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 ax-sep 4233 ax-cnex 8234 ax-resscn 8235 ax-1re 8237 ax-addrcl 8240 |
| 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-ral 2527 df-v 2817 df-in 3220 df-ss 3227 df-int 3955 df-inn 9258 |
| This theorem is referenced by: nnex 9263 nncn 9265 nncnd 9271 nn0addcl 9551 nn0mulcl 9552 dfz2 9670 nnexpcl 10941 fprodnncl 12324 mpodvdsmulf1o 15987 fsumdvdsmul 15988 |
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