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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 9403 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9149 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8173 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4275 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4538 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2304 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 Vcvv 2802 ∪ cun 3198 {csn 3669 0cc0 8032 ℕcn 9143 ℕ0cn0 9402 |
| 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-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-i2m1 8137 |
| 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-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-uni 3894 df-int 3929 df-inn 9144 df-n0 9403 |
| This theorem is referenced by: nn0ennn 10696 nnenom 10697 uzennn 10699 xnn0nnen 10700 wrdexg 11128 expcnvap0 12068 expcnvre 12069 expcnv 12070 geolim 12077 mertenslem2 12102 eftlub 12256 bitsfval 12508 bitsf 12512 1arith 12945 znnen 13024 psrval 14686 fnpsr 14687 psrbag 14689 psrbasg 14694 psrelbas 14695 psrplusgg 14698 psraddcl 14700 psr0cl 14701 psr0lid 14702 psrnegcl 14703 psrlinv 14704 psrgrp 14705 psr1clfi 14708 mplsubgfilemm 14718 mplsubgfilemcl 14719 plyval 15462 elply2 15465 plyf 15467 elplyr 15470 plyaddlem1 15477 plyaddlem 15479 plymullem 15480 plyco 15489 plycj 15491 plyrecj 15493 clwwlknonmpo 16285 depindlem1 16351 depindlem2 16352 |
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