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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 8048 | . 2 ⊢ ℂ ∈ V | |
| 2 | nnsscn 9040 | . 2 ⊢ ℕ ⊆ ℂ | |
| 3 | 1, 2 | ssexi 4181 | 1 ⊢ ℕ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2175 Vcvv 2771 ℂcc 7922 ℕcn 9035 |
| 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 710 ax-5 1469 ax-7 1470 ax-gen 1471 ax-ie1 1515 ax-ie2 1516 ax-8 1526 ax-10 1527 ax-11 1528 ax-i12 1529 ax-bndl 1531 ax-4 1532 ax-17 1548 ax-i9 1552 ax-ial 1556 ax-i5r 1557 ax-ext 2186 ax-sep 4161 ax-cnex 8015 ax-resscn 8016 ax-1re 8018 ax-addrcl 8021 |
| This theorem depends on definitions: df-bi 117 df-tru 1375 df-nf 1483 df-sb 1785 df-clab 2191 df-cleq 2197 df-clel 2200 df-nfc 2336 df-ral 2488 df-v 2773 df-in 3171 df-ss 3178 df-int 3885 df-inn 9036 |
| This theorem is referenced by: nn0ex 9300 nn0ennn 10576 climrecvg1n 11630 climcvg1nlem 11631 divcnv 11779 trireciplem 11782 expcnvap0 11784 expcnv 11786 geo2lim 11798 prmex 12406 qnumval 12478 qdenval 12479 oddennn 12734 evenennn 12735 xpnnen 12736 znnen 12740 qnnen 12773 ssnnctlemct 12788 nninfdc 12795 ndxarg 12826 mulgnngsum 13434 trilpo 15944 redcwlpo 15956 nconstwlpo 15967 neapmkv 15969 |
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