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Mirrors > Home > ILE Home > Th. List > nn0ex | Unicode version |
Description: The set of nonnegative integers exists. (Contributed by NM, 18-Jul-2004.) |
Ref | Expression |
---|---|
nn0ex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-n0 9106 | . 2 | |
2 | nnex 8854 | . . 3 | |
3 | c0ex 7884 | . . . 4 | |
4 | 3 | snex 4158 | . . 3 |
5 | 2, 4 | unex 4413 | . 2 |
6 | 1, 5 | eqeltri 2237 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 2135 cvv 2721 cun 3109 csn 3570 cc0 7744 cn 8848 cn0 9105 |
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 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 ax-un 4405 ax-cnex 7835 ax-resscn 7836 ax-1cn 7837 ax-1re 7838 ax-icn 7839 ax-addcl 7840 ax-addrcl 7841 ax-mulcl 7842 ax-i2m1 7849 |
This theorem depends on definitions: df-bi 116 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ral 2447 df-rex 2448 df-v 2723 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-uni 3784 df-int 3819 df-inn 8849 df-n0 9106 |
This theorem is referenced by: nn0ennn 10358 nnenom 10359 uzennn 10361 expcnvap0 11429 expcnvre 11430 expcnv 11431 geolim 11438 mertenslem2 11463 eftlub 11617 znnen 12268 |
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