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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 12275 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12285 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12216 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2857 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2141 (class class class)co 7391 1c1 11068 + caddc 11070 ℕcn 12204 2c2 12266 3c3 12267 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 ax-un 7713 ax-1cn 11125 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6283 df-ord 6344 df-on 6345 df-lim 6346 df-suc 6347 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-ov 7394 df-om 7842 df-2nd 7966 df-frecs 8256 df-wrecs 8287 df-recs 8336 df-rdg 8375 df-nn 12205 df-2 12274 df-3 12275 |
| This theorem is referenced by: 4nn 12295 3pos 12320 3ne0 12321 3nn0 12493 3z 12598 ige3m2fz 13547 fvf1tp 13793 tpf1ofv0 14503 tpf1ofv1 14504 tpf1ofv2 14505 tpfo 14507 f1oun2prg 14924 01sqrexlem7 15266 bpoly4 16080 fsumcube 16081 sin01bnd 16208 egt2lt3 16229 rpnnen2lem2 16238 rpnnen2lem3 16239 rpnnen2lem4 16240 rpnnen2lem9 16245 rpnnen2lem11 16247 5ndvds3 16438 3lcm2e6woprm 16640 3lcm2e6 16758 prmo3 17068 5prm 17135 6nprm 17136 7prm 17137 9nprm 17139 11prm 17142 13prm 17143 17prm 17144 19prm 17145 23prm 17146 prmlem2 17147 37prm 17148 43prm 17149 83prm 17150 139prm 17151 163prm 17152 317prm 17153 631prm 17154 1259lem5 17162 2503lem1 17164 2503lem2 17165 2503lem3 17166 4001lem4 17171 4001prm 17172 mulrndx 17314 mulridx 17315 rngstr 17318 unifndx 17415 unifid 17416 unifndxnn 17417 slotsdifunifndx 17421 lt6abl 19926 cnfldstr 21414 tangtx 26558 1cubrlem 26894 1cubr 26895 dcubic1lem 26896 dcubic2 26897 dcubic 26899 mcubic 26900 cubic2 26901 cubic 26902 quartlem3 26912 quart 26914 log2cnv 26997 log2tlbnd 26998 log2ublem1 26999 log2ublem2 27000 log2ub 27002 ppiublem1 27254 ppiub 27256 chtub 27264 bposlem3 27338 bposlem4 27339 bposlem5 27340 bposlem6 27341 bposlem9 27344 lgsdir2lem5 27381 dchrvmasumlem2 27550 dchrvmasumlema 27552 pntleml 27663 tgcgr4 28688 axlowdimlem16 29115 axlowdimlem17 29116 usgrexmpldifpr 29416 upgr3v3e3cycl 30339 ex-cnv 30596 ex-rn 30599 ex-mod 30608 2sqr3minply 34038 cos9thpiminplylem1 34040 cos9thpiminplylem2 34041 cos9thpiminplylem5 34044 fib4 34662 circlevma 34897 circlemethhgt 34898 hgt750lema 34912 sinccvglem 35983 cnndvlem1 36936 mblfinlem3 38119 itg2addnclem2 38132 itg2addnc 38134 lcm3un 42593 aks4d1p1 42654 3cubeslem2 43227 3cubeslem3r 43229 3cubes 43232 rmydioph 43552 rmxdioph 43554 expdiophlem2 43560 expdioph 43561 amgm3d 44736 lhe4.4ex1a 44866 modm2nep1 47927 modm1nep2 47929 257prm 48131 fmtno4prmfac193 48143 fmtno4nprmfac193 48144 3ndvds4 48165 139prmALT 48166 31prm 48167 127prm 48169 41prothprm 48189 341fppr2 48317 nfermltl2rev 48326 wtgoldbnnsum4prm 48385 bgoldbnnsum3prm 48387 bgoldbtbndlem1 48388 tgoldbach 48400 grtriclwlk3 48528 gpg3kgrtriexlem2 48667 gpg3kgrtriexlem5 48670 gpg3kgrtriexlem6 48671 gpg3kgrtriex 48672 |
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