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| Mirrors > Home > ILE Home > Th. List > nnex | Unicode version | ||
| Description: The set of positive integers exists. (Contributed by NM, 3-Oct-1999.) (Revised by Mario Carneiro, 17-Nov-2014.) |
| Ref | Expression |
|---|---|
| nnex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnex 8267 |
. 2
| |
| 2 | nnsscn 9259 |
. 2
| |
| 3 | 1, 2 | ssexi 4253 |
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 9255 |
| This theorem is referenced by: nn0ex 9519 nn0ennn 10819 climrecvg1n 12058 climcvg1nlem 12059 divcnv 12208 trireciplem 12211 expcnvap0 12213 expcnv 12215 geo2lim 12227 prmex 12835 qnumval 12907 qdenval 12908 oddennn 13227 evenennn 13228 xpnnen 13229 znnen 13233 qnnen 13266 ssnnctlemct 13281 nninfdc 13288 ndxarg 13319 mulgnngsum 13880 pellexlem3 15973 trilpo 16953 redcwlpo 16966 nconstwlpo 16978 neapmkv 16980 |
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