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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 9514 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9260 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8284 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4303 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4567 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2307 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2205 Vcvv 2815 ∪ cun 3212 {csn 3694 0cc0 8143 ℕcn 9254 ℕ0cn0 9513 |
| 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 2207 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-i2m1 8248 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ral 2527 df-rex 2528 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-uni 3920 df-int 3955 df-inn 9255 df-n0 9514 |
| This theorem is referenced by: nn0ennn 10819 nnenom 10820 uzennn 10822 xnn0nnen 10823 wrdexg 11260 expcnvap0 12213 expcnvre 12214 expcnv 12215 geolim 12222 mertenslem2 12247 eftlub 12401 bitsfval 12653 bitsf 12657 1arith 13090 znnen 13233 psrval 14940 fnpsr 14941 psrbag 14943 psrbagaddclfi 14951 psrbasg 14955 psrelbas 14956 psrplusgg 14959 psraddcl 14961 psr0cl 14962 psr0lid 14963 psrnegcl 14964 psrlinv 14965 psrgrp 14966 psr1clfi 14969 mplsubgfilemm 14979 mplsubgfilemcl 14980 plyval 15723 elply2 15726 plyf 15728 elplyr 15731 plyaddlem1 15738 plyaddlem 15740 plymullem 15741 plyco 15750 plycj 15752 plyrecj 15754 clwwlknonmpo 16549 depindlem1 16627 depindlem2 16628 |
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