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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 2835 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 (class class class)co 7356 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 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pr 5362 ax-un 7678 ax-1cn 11087 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 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 21349 tangtx 26487 1cubrlem 26823 1cubr 26824 dcubic1lem 26825 dcubic2 26826 dcubic 26828 mcubic 26829 cubic2 26830 cubic 26831 quartlem3 26841 quart 26843 log2cnv 26926 log2tlbnd 26927 log2ublem1 26928 log2ublem2 26929 log2ub 26931 ppiublem1 27183 ppiub 27185 chtub 27193 bposlem3 27267 bposlem4 27268 bposlem5 27269 bposlem6 27270 bposlem9 27273 lgsdir2lem5 27310 dchrvmasumlem2 27479 dchrvmasumlema 27481 pntleml 27592 tgcgr4 28617 axlowdimlem16 29044 axlowdimlem17 29045 usgrexmpldifpr 29345 upgr3v3e3cycl 30268 ex-cnv 30525 ex-rn 30528 ex-mod 30537 2sqr3minply 33964 cos9thpiminplylem1 33966 cos9thpiminplylem2 33967 cos9thpiminplylem5 33970 fib4 34588 circlevma 34826 circlemethhgt 34827 hgt750lema 34841 sinccvglem 35900 cnndvlem1 36843 mblfinlem3 38026 itg2addnclem2 38039 itg2addnc 38041 lcm3un 42500 aks4d1p1 42561 3cubeslem2 43134 3cubeslem3r 43136 3cubes 43139 rmydioph 43459 rmxdioph 43461 expdiophlem2 43467 expdioph 43468 amgm3d 44643 lhe4.4ex1a 44773 modm2nep1 47835 modm1nep2 47837 257prm 48039 fmtno4prmfac193 48051 fmtno4nprmfac193 48052 3ndvds4 48073 139prmALT 48074 31prm 48075 127prm 48077 41prothprm 48097 341fppr2 48225 nfermltl2rev 48234 wtgoldbnnsum4prm 48293 bgoldbnnsum3prm 48295 bgoldbtbndlem1 48296 tgoldbach 48308 grtriclwlk3 48436 gpg3kgrtriexlem2 48575 gpg3kgrtriexlem5 48578 gpg3kgrtriexlem6 48579 gpg3kgrtriex 48580 |
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