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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 8293 |
. 2
| |
| 2 | nnsscn 9288 |
. 2
| |
| 3 | 1, 2 | ssexi 4266 |
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 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 4244 ax-cnex 8260 ax-resscn 8261 ax-1re 8263 ax-addrcl 8266 |
| This theorem 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 3966 df-inn 9284 |
| This theorem is referenced by: nn0ex 9548 nn0ennn 10848 climrecvg1n 12092 climcvg1nlem 12093 divcnv 12242 trireciplem 12245 expcnvap0 12247 expcnv 12249 geo2lim 12261 prmex 12869 qnumval 12941 qdenval 12942 oddennn 13261 evenennn 13262 xpnnen 13263 znnen 13267 qnnen 13300 ssnnctlemct 13315 nninfdc 13322 ndxarg 13353 mulgnngzsum 13907 pellexlem3 16007 trilpo 16997 redcwlpo 17010 nconstwlpo 17021 neapmkv 17023 |
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