| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > 3nn | Structured version Visualization version GIF version | ||
| Description: 3 is a positive integer. (Contributed by NM, 8-Jan-2006.) |
| Ref | Expression |
|---|---|
| 3nn | ⊢ 3 ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 12209 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12218 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12157 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 (class class class)co 7358 1c1 11027 + caddc 11029 ℕcn 12145 2c2 12200 3c3 12201 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 ax-un 7680 ax-1cn 11084 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7361 df-om 7809 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-nn 12146 df-2 12208 df-3 12209 |
| This theorem is referenced by: 4nn 12228 3ne0 12251 3nn0 12419 3z 12524 ige3m2fz 13464 fvf1tp 13709 tpf1ofv0 14419 tpf1ofv1 14420 tpf1ofv2 14421 tpfo 14423 f1oun2prg 14840 01sqrexlem7 15171 bpoly4 15982 fsumcube 15983 sin01bnd 16110 egt2lt3 16131 rpnnen2lem2 16140 rpnnen2lem3 16141 rpnnen2lem4 16142 rpnnen2lem9 16147 rpnnen2lem11 16149 5ndvds3 16340 3lcm2e6woprm 16542 3lcm2e6 16659 prmo3 16969 5prm 17036 6nprm 17037 7prm 17038 9nprm 17040 11prm 17042 13prm 17043 17prm 17044 19prm 17045 23prm 17046 prmlem2 17047 37prm 17048 43prm 17049 83prm 17050 139prm 17051 163prm 17052 317prm 17053 631prm 17054 1259lem5 17062 2503lem1 17064 2503lem2 17065 2503lem3 17066 4001lem4 17071 4001prm 17072 mulrndx 17214 mulridx 17215 rngstr 17218 unifndx 17315 unifid 17316 unifndxnn 17317 slotsdifunifndx 17321 lt6abl 19824 cnfldstr 21311 cnfldstrOLD 21326 tangtx 26470 1cubrlem 26807 1cubr 26808 dcubic1lem 26809 dcubic2 26810 dcubic 26812 mcubic 26813 cubic2 26814 cubic 26815 quartlem3 26825 quart 26827 log2cnv 26910 log2tlbnd 26911 log2ublem1 26912 log2ublem2 26913 log2ub 26915 ppiublem1 27169 ppiub 27171 chtub 27179 bposlem3 27253 bposlem4 27254 bposlem5 27255 bposlem6 27256 bposlem9 27259 lgsdir2lem5 27296 dchrvmasumlem2 27465 dchrvmasumlema 27467 pntleml 27578 tgcgr4 28603 axlowdimlem16 29030 axlowdimlem17 29031 usgrexmpldifpr 29331 upgr3v3e3cycl 30255 ex-cnv 30512 ex-rn 30515 ex-mod 30524 2sqr3minply 33937 cos9thpiminplylem1 33939 cos9thpiminplylem2 33940 cos9thpiminplylem5 33943 fib4 34561 circlevma 34799 circlemethhgt 34800 hgt750lema 34814 sinccvglem 35866 cnndvlem1 36737 mblfinlem3 37860 itg2addnclem2 37873 itg2addnc 37875 lcm3un 42269 aks4d1p1 42330 3cubeslem2 42927 3cubeslem3r 42929 3cubes 42932 rmydioph 43256 rmxdioph 43258 expdiophlem2 43264 expdioph 43265 amgm3d 44440 lhe4.4ex1a 44570 modm2nep1 47612 modm1nep2 47614 257prm 47807 fmtno4prmfac193 47819 fmtno4nprmfac193 47820 3ndvds4 47841 139prmALT 47842 31prm 47843 127prm 47845 41prothprm 47865 341fppr2 47980 nfermltl2rev 47989 wtgoldbnnsum4prm 48048 bgoldbnnsum3prm 48050 bgoldbtbndlem1 48051 tgoldbach 48063 grtriclwlk3 48191 gpg3kgrtriexlem2 48330 gpg3kgrtriexlem5 48333 gpg3kgrtriexlem6 48334 gpg3kgrtriex 48335 |
| Copyright terms: Public domain | W3C validator |