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| Mirrors > Home > ILE Home > Th. List > nnsscn | GIF version | ||
| Description: The positive integers are a subset of the complex numbers. (Contributed by NM, 2-Aug-2004.) |
| Ref | Expression |
|---|---|
| nnsscn | ⊢ ℕ ⊆ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnssre 9011 | . 2 ⊢ ℕ ⊆ ℝ | |
| 2 | ax-resscn 7988 | . 2 ⊢ ℝ ⊆ ℂ | |
| 3 | 1, 2 | sstri 3193 | 1 ⊢ ℕ ⊆ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ⊆ wss 3157 ℂcc 7894 ℝcr 7895 ℕcn 9007 |
| 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 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 ax-sep 4152 ax-cnex 7987 ax-resscn 7988 ax-1re 7990 ax-addrcl 7993 |
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-v 2765 df-in 3163 df-ss 3170 df-int 3876 df-inn 9008 |
| This theorem is referenced by: nnex 9013 nncn 9015 nncnd 9021 nn0addcl 9301 nn0mulcl 9302 dfz2 9415 nnexpcl 10661 fprodnncl 11792 mpodvdsmulf1o 15310 fsumdvdsmul 15311 |
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