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| 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 12236 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12245 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12177 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2833 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7360 1c1 11030 + caddc 11032 ℕcn 12165 2c2 12227 3c3 12228 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5370 ax-un 7682 ax-1cn 11087 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 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 7363 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-nn 12166 df-2 12235 df-3 12236 |
| This theorem is referenced by: 4nn 12255 3ne0 12278 3nn0 12446 3z 12551 ige3m2fz 13493 fvf1tp 13739 tpf1ofv0 14449 tpf1ofv1 14450 tpf1ofv2 14451 tpfo 14453 f1oun2prg 14870 01sqrexlem7 15201 bpoly4 16015 fsumcube 16016 sin01bnd 16143 egt2lt3 16164 rpnnen2lem2 16173 rpnnen2lem3 16174 rpnnen2lem4 16175 rpnnen2lem9 16180 rpnnen2lem11 16182 5ndvds3 16373 3lcm2e6woprm 16575 3lcm2e6 16693 prmo3 17003 5prm 17070 6nprm 17071 7prm 17072 9nprm 17074 11prm 17076 13prm 17077 17prm 17078 19prm 17079 23prm 17080 prmlem2 17081 37prm 17082 43prm 17083 83prm 17084 139prm 17085 163prm 17086 317prm 17087 631prm 17088 1259lem5 17096 2503lem1 17098 2503lem2 17099 2503lem3 17100 4001lem4 17105 4001prm 17106 mulrndx 17248 mulridx 17249 rngstr 17252 unifndx 17349 unifid 17350 unifndxnn 17351 slotsdifunifndx 17355 lt6abl 19861 cnfldstr 21346 cnfldstrOLD 21361 tangtx 26482 1cubrlem 26818 1cubr 26819 dcubic1lem 26820 dcubic2 26821 dcubic 26823 mcubic 26824 cubic2 26825 cubic 26826 quartlem3 26836 quart 26838 log2cnv 26921 log2tlbnd 26922 log2ublem1 26923 log2ublem2 26924 log2ub 26926 ppiublem1 27179 ppiub 27181 chtub 27189 bposlem3 27263 bposlem4 27264 bposlem5 27265 bposlem6 27266 bposlem9 27269 lgsdir2lem5 27306 dchrvmasumlem2 27475 dchrvmasumlema 27477 pntleml 27588 tgcgr4 28613 axlowdimlem16 29040 axlowdimlem17 29041 usgrexmpldifpr 29341 upgr3v3e3cycl 30265 ex-cnv 30522 ex-rn 30525 ex-mod 30534 2sqr3minply 33940 cos9thpiminplylem1 33942 cos9thpiminplylem2 33943 cos9thpiminplylem5 33946 fib4 34564 circlevma 34802 circlemethhgt 34803 hgt750lema 34817 sinccvglem 35870 cnndvlem1 36813 mblfinlem3 37994 itg2addnclem2 38007 itg2addnc 38009 lcm3un 42468 aks4d1p1 42529 3cubeslem2 43131 3cubeslem3r 43133 3cubes 43136 rmydioph 43460 rmxdioph 43462 expdiophlem2 43468 expdioph 43469 amgm3d 44644 lhe4.4ex1a 44774 modm2nep1 47832 modm1nep2 47834 257prm 48036 fmtno4prmfac193 48048 fmtno4nprmfac193 48049 3ndvds4 48070 139prmALT 48071 31prm 48072 127prm 48074 41prothprm 48094 341fppr2 48222 nfermltl2rev 48231 wtgoldbnnsum4prm 48290 bgoldbnnsum3prm 48292 bgoldbtbndlem1 48293 tgoldbach 48305 grtriclwlk3 48433 gpg3kgrtriexlem2 48572 gpg3kgrtriexlem5 48575 gpg3kgrtriexlem6 48576 gpg3kgrtriex 48577 |
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