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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 9497 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9243 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8268 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4298 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4562 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2305 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 Vcvv 2813 ∪ cun 3209 {csn 3689 0cc0 8127 ℕcn 9237 ℕ0cn0 9496 |
| 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 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-cnex 8218 ax-resscn 8219 ax-1cn 8220 ax-1re 8221 ax-icn 8222 ax-addcl 8223 ax-addrcl 8224 ax-mulcl 8225 ax-i2m1 8232 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-uni 3915 df-int 3950 df-inn 9238 df-n0 9497 |
| This theorem is referenced by: nn0ennn 10795 nnenom 10796 uzennn 10798 xnn0nnen 10799 wrdexg 11235 expcnvap0 12188 expcnvre 12189 expcnv 12190 geolim 12197 mertenslem2 12222 eftlub 12376 bitsfval 12628 bitsf 12632 1arith 13065 znnen 13149 psrval 14814 fnpsr 14815 psrbag 14817 psrbagaddclfi 14825 psrbasg 14829 psrelbas 14830 psrplusgg 14833 psraddcl 14835 psr0cl 14836 psr0lid 14837 psrnegcl 14838 psrlinv 14839 psrgrp 14840 psr1clfi 14843 mplsubgfilemm 14853 mplsubgfilemcl 14854 plyval 15597 elply2 15600 plyf 15602 elplyr 15605 plyaddlem1 15612 plyaddlem 15614 plymullem 15615 plyco 15624 plycj 15626 plyrecj 15628 clwwlknonmpo 16423 depindlem1 16501 depindlem2 16502 |
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