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| Mirrors > Home > ILE Home > Th. List > nn0ex | GIF version | ||
| Description: The set of nonnegative integers exists. (Contributed by NM, 18-Jul-2004.) |
| Ref | Expression |
|---|---|
| nn0ex | ⊢ ℕ0 ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-n0 9543 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9289 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8310 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4317 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4582 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2311 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 Vcvv 2821 ∪ cun 3218 {csn 3705 0cc0 8169 ℕcn 9283 ℕ0cn0 9542 |
| 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 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-i2m1 8274 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-uni 3931 df-int 3966 df-inn 9284 df-n0 9543 |
| This theorem is referenced by: nn0ennn 10848 nnenom 10849 uzennn 10851 xnn0nnen 10852 wrdexg 11293 expcnvap0 12247 expcnvre 12248 expcnv 12249 geolim 12256 mertenslem2 12281 eftlub 12435 bitsfval 12687 bitsf 12691 1arith 13124 znnen 13267 psrval 14973 fnpsr 14974 psrbag 14976 psrbagaddclfi 14984 psrbasg 14988 psrelbas 14989 psrplusgg 14992 psraddcl 14994 psr0cl 14995 psr0lid 14996 psrnegcl 14997 psrlinv 14998 psrgrp 14999 psr1clfi 15002 mplsubgfilemm 15012 mplsubgfilemcl 15013 plyval 15756 elply2 15759 plyf 15761 elplyr 15764 plyaddlem1 15771 plyaddlem 15773 plymullem 15774 plyco 15783 plycj 15785 plyrecj 15787 clwwlknonmpo 16583 depindlem1 16661 depindlem2 16662 |
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