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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 9308 | . 2 ⊢ ℕ ⊆ ℝ | |
| 2 | ax-resscn 8271 | . 2 ⊢ ℝ ⊆ ℂ | |
| 3 | 1, 2 | sstri 3257 | 1 ⊢ ℕ ⊆ ℂ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ⊆ wss 3220 ℂcc 8177 ℝcr 8178 ℕcn 9304 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4249 ax-cnex 8270 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-v 2823 df-in 3226 df-ss 3233 df-int 3971 df-inn 9305 |
| This theorem is used by: nnex 9310 nncn 9312 nncnd 9318 nn0addcl 9598 nn0mulcl 9599 dfz2 9717 nnexpcl 10989 fprodnncl 12377 mpodvdsmulf1o 16104 fsumdvdsmul 16105 |
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