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| Mirrors > Home > ILE Home > Th. List > nnex | GIF version | ||
| Description: The set of positive integers exists. (Contributed by NM, 3-Oct-1999.) (Revised by Mario Carneiro, 17-Nov-2014.) |
| Ref | Expression |
|---|---|
| nnex | ⊢ ℕ ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnex 8251 | . 2 ⊢ ℂ ∈ V | |
| 2 | nnsscn 9242 | . 2 ⊢ ℕ ⊆ ℂ | |
| 3 | 1, 2 | ssexi 4248 | 1 ⊢ ℕ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 Vcvv 2813 ℂcc 8125 ℕcn 9237 |
| 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 2214 ax-sep 4228 ax-cnex 8218 ax-resscn 8219 ax-1re 8221 ax-addrcl 8224 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-v 2815 df-in 3217 df-ss 3224 df-int 3950 df-inn 9238 |
| This theorem is referenced by: nn0ex 9502 nn0ennn 10795 climrecvg1n 12033 climcvg1nlem 12034 divcnv 12183 trireciplem 12186 expcnvap0 12188 expcnv 12190 geo2lim 12202 prmex 12810 qnumval 12882 qdenval 12883 oddennn 13143 evenennn 13144 xpnnen 13145 znnen 13149 qnnen 13182 ssnnctlemct 13197 nninfdc 13204 ndxarg 13235 mulgnngsum 13844 pellexlem3 15847 trilpo 16827 redcwlpo 16840 nconstwlpo 16852 neapmkv 16854 |
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