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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 9445 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9191 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8216 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4281 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4544 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2304 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 Vcvv 2803 ∪ cun 3199 {csn 3673 0cc0 8075 ℕcn 9185 ℕ0cn0 9444 |
| 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-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-cnex 8166 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-i2m1 8180 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-uni 3899 df-int 3934 df-inn 9186 df-n0 9445 |
| This theorem is referenced by: nn0ennn 10741 nnenom 10742 uzennn 10744 xnn0nnen 10745 wrdexg 11173 expcnvap0 12126 expcnvre 12127 expcnv 12128 geolim 12135 mertenslem2 12160 eftlub 12314 bitsfval 12566 bitsf 12570 1arith 13003 znnen 13082 psrval 14745 fnpsr 14746 psrbag 14748 psrbasg 14758 psrelbas 14759 psrplusgg 14762 psraddcl 14764 psr0cl 14765 psr0lid 14766 psrnegcl 14767 psrlinv 14768 psrgrp 14769 psr1clfi 14772 mplsubgfilemm 14782 mplsubgfilemcl 14783 plyval 15526 elply2 15529 plyf 15531 elplyr 15534 plyaddlem1 15541 plyaddlem 15543 plymullem 15544 plyco 15553 plycj 15555 plyrecj 15557 clwwlknonmpo 16352 depindlem1 16430 depindlem2 16431 |
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