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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 12221 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12230 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12169 | . . 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 7368 1c1 11039 + caddc 11041 ℕcn 12157 2c2 12212 3c3 12213 |
| 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 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 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 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 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-om 7819 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-nn 12158 df-2 12220 df-3 12221 |
| This theorem is referenced by: 4nn 12240 3ne0 12263 3nn0 12431 3z 12536 ige3m2fz 13476 fvf1tp 13721 tpf1ofv0 14431 tpf1ofv1 14432 tpf1ofv2 14433 tpfo 14435 f1oun2prg 14852 01sqrexlem7 15183 bpoly4 15994 fsumcube 15995 sin01bnd 16122 egt2lt3 16143 rpnnen2lem2 16152 rpnnen2lem3 16153 rpnnen2lem4 16154 rpnnen2lem9 16159 rpnnen2lem11 16161 5ndvds3 16352 3lcm2e6woprm 16554 3lcm2e6 16671 prmo3 16981 5prm 17048 6nprm 17049 7prm 17050 9nprm 17052 11prm 17054 13prm 17055 17prm 17056 19prm 17057 23prm 17058 prmlem2 17059 37prm 17060 43prm 17061 83prm 17062 139prm 17063 163prm 17064 317prm 17065 631prm 17066 1259lem5 17074 2503lem1 17076 2503lem2 17077 2503lem3 17078 4001lem4 17083 4001prm 17084 mulrndx 17226 mulridx 17227 rngstr 17230 unifndx 17327 unifid 17328 unifndxnn 17329 slotsdifunifndx 17333 lt6abl 19836 cnfldstr 21323 cnfldstrOLD 21338 tangtx 26482 1cubrlem 26819 1cubr 26820 dcubic1lem 26821 dcubic2 26822 dcubic 26824 mcubic 26825 cubic2 26826 cubic 26827 quartlem3 26837 quart 26839 log2cnv 26922 log2tlbnd 26923 log2ublem1 26924 log2ublem2 26925 log2ub 26927 ppiublem1 27181 ppiub 27183 chtub 27191 bposlem3 27265 bposlem4 27266 bposlem5 27267 bposlem6 27268 bposlem9 27271 lgsdir2lem5 27308 dchrvmasumlem2 27477 dchrvmasumlema 27479 pntleml 27590 tgcgr4 28615 axlowdimlem16 29042 axlowdimlem17 29043 usgrexmpldifpr 29343 upgr3v3e3cycl 30267 ex-cnv 30524 ex-rn 30527 ex-mod 30536 2sqr3minply 33957 cos9thpiminplylem1 33959 cos9thpiminplylem2 33960 cos9thpiminplylem5 33963 fib4 34581 circlevma 34819 circlemethhgt 34820 hgt750lema 34834 sinccvglem 35885 cnndvlem1 36756 mblfinlem3 37907 itg2addnclem2 37920 itg2addnc 37922 lcm3un 42382 aks4d1p1 42443 3cubeslem2 43039 3cubeslem3r 43041 3cubes 43044 rmydioph 43368 rmxdioph 43370 expdiophlem2 43376 expdioph 43377 amgm3d 44552 lhe4.4ex1a 44682 modm2nep1 47723 modm1nep2 47725 257prm 47918 fmtno4prmfac193 47930 fmtno4nprmfac193 47931 3ndvds4 47952 139prmALT 47953 31prm 47954 127prm 47956 41prothprm 47976 341fppr2 48091 nfermltl2rev 48100 wtgoldbnnsum4prm 48159 bgoldbnnsum3prm 48161 bgoldbtbndlem1 48162 tgoldbach 48174 grtriclwlk3 48302 gpg3kgrtriexlem2 48441 gpg3kgrtriexlem5 48444 gpg3kgrtriexlem6 48445 gpg3kgrtriex 48446 |
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