| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 9568 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9312 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8320 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4322 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4587 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2311 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 Vcvv 2821 ∪ cun 3218 {csn 3709 0cc0 8179 ℕcn 9306 ℕ0cn0 9567 |
| This proof depends on 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 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-i2m1 8284 |
| This proof 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 3690 df-sn 3715 df-pr 3716 df-uni 3936 df-int 3971 df-inn 9307 df-n0 9568 |
| This theorem is used by: nn0ennn 10883 nnenom 10884 uzennn 10886 xnn0nnen 10887 wrdexg 11329 expcnvap0 12285 expcnvre 12286 expcnv 12287 geolim 12294 mertenslem2 12319 eftlub 12473 bitsfval 12725 bitsf 12729 1arith 13166 znnen 13338 psrval 15099 fnpsr 15100 psrbag 15102 psrbagaddclfi 15110 psrbasg 15114 psrelbas 15115 psrplusgg 15118 psraddcl 15120 psr0cl 15121 psr0lid 15122 psrnegcl 15123 psrlinv 15124 psrgrp 15125 psr1clfi 15128 mplsubgfilemm 15138 mplsubgfilemcl 15139 plyval 15882 elply2 15885 plyf 15887 elplyr 15890 plyaddlem1 15897 plyaddlem 15899 plymullem 15900 plyco 15909 plycj 15911 plyrecj 15913 clwwlknonmpo 16767 depindlem1 16845 depindlem2 16846 |
| Copyright terms: Public domain | W3C validator |