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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 8155 | . 2 ⊢ ℂ ∈ V | |
| 2 | nnsscn 9147 | . 2 ⊢ ℕ ⊆ ℂ | |
| 3 | 1, 2 | ssexi 4227 | 1 ⊢ ℕ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 Vcvv 2802 ℂcc 8029 ℕcn 9142 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-sep 4207 ax-cnex 8122 ax-resscn 8123 ax-1re 8125 ax-addrcl 8128 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-v 2804 df-in 3206 df-ss 3213 df-int 3929 df-inn 9143 |
| This theorem is referenced by: nn0ex 9407 nn0ennn 10694 climrecvg1n 11908 climcvg1nlem 11909 divcnv 12057 trireciplem 12060 expcnvap0 12062 expcnv 12064 geo2lim 12076 prmex 12684 qnumval 12756 qdenval 12757 oddennn 13012 evenennn 13013 xpnnen 13014 znnen 13018 qnnen 13051 ssnnctlemct 13066 nninfdc 13073 ndxarg 13104 mulgnngsum 13713 trilpo 16647 redcwlpo 16659 nconstwlpo 16670 neapmkv 16672 |
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