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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 7737 | . 2 | |
2 | nnsscn 8718 | . 2 | |
3 | 1, 2 | ssexi 4061 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 cvv 2681 cc 7611 cn 8713 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-cnex 7704 ax-resscn 7705 ax-1re 7707 ax-addrcl 7710 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-v 2683 df-in 3072 df-ss 3079 df-int 3767 df-inn 8714 |
This theorem is referenced by: nn0ex 8976 nn0ennn 10199 climrecvg1n 11110 climcvg1nlem 11111 divcnv 11259 trireciplem 11262 expcnvap0 11264 expcnv 11266 geo2lim 11278 prmex 11783 qnumval 11852 qdenval 11853 oddennn 11894 evenennn 11895 xpnnen 11896 znnen 11900 qnnen 11933 ndxarg 11971 trilpo 13225 |
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