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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 9393 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9139 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8163 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4273 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4536 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2302 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 Vcvv 2800 ∪ cun 3196 {csn 3667 0cc0 8022 ℕcn 9133 ℕ0cn0 9392 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-cnex 8113 ax-resscn 8114 ax-1cn 8115 ax-1re 8116 ax-icn 8117 ax-addcl 8118 ax-addrcl 8119 ax-mulcl 8120 ax-i2m1 8127 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-uni 3892 df-int 3927 df-inn 9134 df-n0 9393 |
| This theorem is referenced by: nn0ennn 10685 nnenom 10686 uzennn 10688 xnn0nnen 10689 wrdexg 11114 expcnvap0 12053 expcnvre 12054 expcnv 12055 geolim 12062 mertenslem2 12087 eftlub 12241 bitsfval 12493 bitsf 12497 1arith 12930 znnen 13009 psrval 14670 fnpsr 14671 psrbag 14673 psrbasg 14678 psrelbas 14679 psrplusgg 14682 psraddcl 14684 psr0cl 14685 psr0lid 14686 psrnegcl 14687 psrlinv 14688 psrgrp 14689 psr1clfi 14692 mplsubgfilemm 14702 mplsubgfilemcl 14703 plyval 15446 elply2 15449 plyf 15451 elplyr 15454 plyaddlem1 15461 plyaddlem 15463 plymullem 15464 plyco 15473 plycj 15475 plyrecj 15477 clwwlknonmpo 16223 |
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