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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 8134 |
. 2
| |
| 2 | nnsscn 9126 |
. 2
| |
| 3 | 1, 2 | ssexi 4222 |
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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-sep 4202 ax-cnex 8101 ax-resscn 8102 ax-1re 8104 ax-addrcl 8107 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-v 2801 df-in 3203 df-ss 3210 df-int 3924 df-inn 9122 |
| This theorem is referenced by: nn0ex 9386 nn0ennn 10667 climrecvg1n 11875 climcvg1nlem 11876 divcnv 12024 trireciplem 12027 expcnvap0 12029 expcnv 12031 geo2lim 12043 prmex 12651 qnumval 12723 qdenval 12724 oddennn 12979 evenennn 12980 xpnnen 12981 znnen 12985 qnnen 13018 ssnnctlemct 13033 nninfdc 13040 ndxarg 13071 mulgnngsum 13680 trilpo 16499 redcwlpo 16511 nconstwlpo 16522 neapmkv 16524 |
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