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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 12245 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12254 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12186 | . . 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 2114 (class class class)co 7367 1c1 11039 + caddc 11041 ℕcn 12174 2c2 12236 3c3 12237 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-un 7689 ax-1cn 11096 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-nn 12175 df-2 12244 df-3 12245 |
| This theorem is referenced by: 4nn 12264 3ne0 12287 3nn0 12455 3z 12560 ige3m2fz 13502 fvf1tp 13748 tpf1ofv0 14458 tpf1ofv1 14459 tpf1ofv2 14460 tpfo 14462 f1oun2prg 14879 01sqrexlem7 15210 bpoly4 16024 fsumcube 16025 sin01bnd 16152 egt2lt3 16173 rpnnen2lem2 16182 rpnnen2lem3 16183 rpnnen2lem4 16184 rpnnen2lem9 16189 rpnnen2lem11 16191 5ndvds3 16382 3lcm2e6woprm 16584 3lcm2e6 16702 prmo3 17012 5prm 17079 6nprm 17080 7prm 17081 9nprm 17083 11prm 17085 13prm 17086 17prm 17087 19prm 17088 23prm 17089 prmlem2 17090 37prm 17091 43prm 17092 83prm 17093 139prm 17094 163prm 17095 317prm 17096 631prm 17097 1259lem5 17105 2503lem1 17107 2503lem2 17108 2503lem3 17109 4001lem4 17114 4001prm 17115 mulrndx 17257 mulridx 17258 rngstr 17261 unifndx 17358 unifid 17359 unifndxnn 17360 slotsdifunifndx 17364 lt6abl 19870 cnfldstr 21354 tangtx 26469 1cubrlem 26805 1cubr 26806 dcubic1lem 26807 dcubic2 26808 dcubic 26810 mcubic 26811 cubic2 26812 cubic 26813 quartlem3 26823 quart 26825 log2cnv 26908 log2tlbnd 26909 log2ublem1 26910 log2ublem2 26911 log2ub 26913 ppiublem1 27165 ppiub 27167 chtub 27175 bposlem3 27249 bposlem4 27250 bposlem5 27251 bposlem6 27252 bposlem9 27255 lgsdir2lem5 27292 dchrvmasumlem2 27461 dchrvmasumlema 27463 pntleml 27574 tgcgr4 28599 axlowdimlem16 29026 axlowdimlem17 29027 usgrexmpldifpr 29327 upgr3v3e3cycl 30250 ex-cnv 30507 ex-rn 30510 ex-mod 30519 2sqr3minply 33924 cos9thpiminplylem1 33926 cos9thpiminplylem2 33927 cos9thpiminplylem5 33930 fib4 34548 circlevma 34786 circlemethhgt 34787 hgt750lema 34801 sinccvglem 35854 cnndvlem1 36797 mblfinlem3 37980 itg2addnclem2 37993 itg2addnc 37995 lcm3un 42454 aks4d1p1 42515 3cubeslem2 43117 3cubeslem3r 43119 3cubes 43122 rmydioph 43442 rmxdioph 43444 expdiophlem2 43450 expdioph 43451 amgm3d 44626 lhe4.4ex1a 44756 modm2nep1 47820 modm1nep2 47822 257prm 48024 fmtno4prmfac193 48036 fmtno4nprmfac193 48037 3ndvds4 48058 139prmALT 48059 31prm 48060 127prm 48062 41prothprm 48082 341fppr2 48210 nfermltl2rev 48219 wtgoldbnnsum4prm 48278 bgoldbnnsum3prm 48280 bgoldbtbndlem1 48281 tgoldbach 48293 grtriclwlk3 48421 gpg3kgrtriexlem2 48560 gpg3kgrtriexlem5 48563 gpg3kgrtriexlem6 48564 gpg3kgrtriex 48565 |
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