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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnssre 8110 |
. 2
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2 | ax-resscn 7130 |
. 2
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3 | 1, 2 | sstri 3009 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3904 ax-cnex 7129 ax-resscn 7130 ax-1re 7132 ax-addrcl 7135 |
This theorem depends on definitions: df-bi 115 df-tru 1288 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-v 2604 df-in 2980 df-ss 2987 df-int 3645 df-inn 8107 |
This theorem is referenced by: nnex 8112 nncn 8114 nncnd 8120 nn0addcl 8390 nn0mulcl 8391 dfz2 8501 nnexpcl 9586 |
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