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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 9381 | . 2 ⊢ ℕ0 = (ℕ ∪ {0}) | |
| 2 | nnex 9127 | . . 3 ⊢ ℕ ∈ V | |
| 3 | c0ex 8151 | . . . 4 ⊢ 0 ∈ V | |
| 4 | 3 | snex 4269 | . . 3 ⊢ {0} ∈ V |
| 5 | 2, 4 | unex 4532 | . 2 ⊢ (ℕ ∪ {0}) ∈ V |
| 6 | 1, 5 | eqeltri 2302 | 1 ⊢ ℕ0 ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 Vcvv 2799 ∪ cun 3195 {csn 3666 0cc0 8010 ℕcn 9121 ℕ0cn0 9380 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-i2m1 8115 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-uni 3889 df-int 3924 df-inn 9122 df-n0 9381 |
| This theorem is referenced by: nn0ennn 10667 nnenom 10668 uzennn 10670 xnn0nnen 10671 wrdexg 11095 expcnvap0 12028 expcnvre 12029 expcnv 12030 geolim 12037 mertenslem2 12062 eftlub 12216 bitsfval 12468 bitsf 12472 1arith 12905 znnen 12984 psrval 14645 fnpsr 14646 psrbag 14648 psrbasg 14653 psrelbas 14654 psrplusgg 14657 psraddcl 14659 psr0cl 14660 psr0lid 14661 psrnegcl 14662 psrlinv 14663 psrgrp 14664 psr1clfi 14667 mplsubgfilemm 14677 mplsubgfilemcl 14678 plyval 15421 elply2 15424 plyf 15426 elplyr 15429 plyaddlem1 15436 plyaddlem 15438 plymullem 15439 plyco 15448 plycj 15450 plyrecj 15452 |
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