| 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 9402 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9148 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8172 | . . . 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 8031 ℕcn 9142 ℕ0cn0 9401 |
| 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 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-i2m1 8136 |
| 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 9143 df-n0 9402 |
| This theorem is referenced by: nn0ennn 10694 nnenom 10695 uzennn 10697 xnn0nnen 10698 wrdexg 11123 expcnvap0 12062 expcnvre 12063 expcnv 12064 geolim 12071 mertenslem2 12096 eftlub 12250 bitsfval 12502 bitsf 12506 1arith 12939 znnen 13018 psrval 14679 fnpsr 14680 psrbag 14682 psrbasg 14687 psrelbas 14688 psrplusgg 14691 psraddcl 14693 psr0cl 14694 psr0lid 14695 psrnegcl 14696 psrlinv 14697 psrgrp 14698 psr1clfi 14701 mplsubgfilemm 14711 mplsubgfilemcl 14712 plyval 15455 elply2 15458 plyf 15460 elplyr 15463 plyaddlem1 15470 plyaddlem 15472 plymullem 15473 plyco 15482 plycj 15484 plyrecj 15486 clwwlknonmpo 16278 |
| Copyright terms: Public domain | W3C validator |