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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 8582 |
. 2
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2 | ax-resscn 7587 |
. 2
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3 | 1, 2 | sstri 3056 |
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 105 ax-ia2 106 ax-ia3 107 ax-io 671 ax-5 1391 ax-7 1392 ax-gen 1393 ax-ie1 1437 ax-ie2 1438 ax-8 1450 ax-10 1451 ax-11 1452 ax-i12 1453 ax-bndl 1454 ax-4 1455 ax-17 1474 ax-i9 1478 ax-ial 1482 ax-i5r 1483 ax-ext 2082 ax-sep 3986 ax-cnex 7586 ax-resscn 7587 ax-1re 7589 ax-addrcl 7592 |
This theorem depends on definitions: df-bi 116 df-tru 1302 df-nf 1405 df-sb 1704 df-clab 2087 df-cleq 2093 df-clel 2096 df-nfc 2229 df-ral 2380 df-v 2643 df-in 3027 df-ss 3034 df-int 3719 df-inn 8579 |
This theorem is referenced by: nnex 8584 nncn 8586 nncnd 8592 nn0addcl 8864 nn0mulcl 8865 dfz2 8975 nnexpcl 10147 |
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