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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 12240 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12249 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12181 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2837 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2121 (class class class)co 7359 1c1 11035 + caddc 11037 ℕcn 12169 2c2 12231 3c3 12232 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5220 ax-nul 5230 ax-pr 5364 ax-un 7681 ax-1cn 11092 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3725 df-csb 3833 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-pss 3904 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-ov 7362 df-om 7810 df-2nd 7934 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8343 df-nn 12170 df-2 12239 df-3 12240 |
| This theorem is referenced by: 4nn 12259 3ne0 12282 3nn0 12450 3z 12555 ige3m2fz 13497 fvf1tp 13743 tpf1ofv0 14453 tpf1ofv1 14454 tpf1ofv2 14455 tpfo 14457 f1oun2prg 14874 01sqrexlem7 15205 bpoly4 16019 fsumcube 16020 sin01bnd 16147 egt2lt3 16168 rpnnen2lem2 16177 rpnnen2lem3 16178 rpnnen2lem4 16179 rpnnen2lem9 16184 rpnnen2lem11 16186 5ndvds3 16377 3lcm2e6woprm 16579 3lcm2e6 16697 prmo3 17007 5prm 17074 6nprm 17075 7prm 17076 9nprm 17078 11prm 17080 13prm 17081 17prm 17082 19prm 17083 23prm 17084 prmlem2 17085 37prm 17086 43prm 17087 83prm 17088 139prm 17089 163prm 17090 317prm 17091 631prm 17092 1259lem5 17100 2503lem1 17102 2503lem2 17103 2503lem3 17104 4001lem4 17109 4001prm 17110 mulrndx 17252 mulridx 17253 rngstr 17256 unifndx 17353 unifid 17354 unifndxnn 17355 slotsdifunifndx 17359 lt6abl 19864 cnfldstr 21352 tangtx 26490 1cubrlem 26826 1cubr 26827 dcubic1lem 26828 dcubic2 26829 dcubic 26831 mcubic 26832 cubic2 26833 cubic 26834 quartlem3 26844 quart 26846 log2cnv 26929 log2tlbnd 26930 log2ublem1 26931 log2ublem2 26932 log2ub 26934 ppiublem1 27186 ppiub 27188 chtub 27196 bposlem3 27270 bposlem4 27271 bposlem5 27272 bposlem6 27273 bposlem9 27276 lgsdir2lem5 27313 dchrvmasumlem2 27482 dchrvmasumlema 27484 pntleml 27595 tgcgr4 28619 axlowdimlem16 29046 axlowdimlem17 29047 usgrexmpldifpr 29347 upgr3v3e3cycl 30270 ex-cnv 30527 ex-rn 30530 ex-mod 30539 2sqr3minply 33974 cos9thpiminplylem1 33976 cos9thpiminplylem2 33977 cos9thpiminplylem5 33980 fib4 34598 circlevma 34836 circlemethhgt 34837 hgt750lema 34851 sinccvglem 35913 cnndvlem1 36856 mblfinlem3 38039 itg2addnclem2 38052 itg2addnc 38054 lcm3un 42513 aks4d1p1 42574 3cubeslem2 43147 3cubeslem3r 43149 3cubes 43152 rmydioph 43472 rmxdioph 43474 expdiophlem2 43480 expdioph 43481 amgm3d 44656 lhe4.4ex1a 44786 modm2nep1 47847 modm1nep2 47849 257prm 48051 fmtno4prmfac193 48063 fmtno4nprmfac193 48064 3ndvds4 48085 139prmALT 48086 31prm 48087 127prm 48089 41prothprm 48109 341fppr2 48237 nfermltl2rev 48246 wtgoldbnnsum4prm 48305 bgoldbnnsum3prm 48307 bgoldbtbndlem1 48308 tgoldbach 48320 grtriclwlk3 48448 gpg3kgrtriexlem2 48587 gpg3kgrtriexlem5 48590 gpg3kgrtriexlem6 48591 gpg3kgrtriex 48592 |
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