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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 12300 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12310 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12241 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2865 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 (class class class)co 7408 1c1 11097 + caddc 11099 ℕcn 12229 2c2 12291 3c3 12292 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pr 5402 ax-un 7730 ax-1cn 11154 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7411 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-nn 12230 df-2 12299 df-3 12300 |
| This theorem is referenced by: 4nn 12320 3pos 12345 3ne0 12346 3nn0 12518 3z 12623 ige3m2fz 13572 fvf1tp 13818 tpf1ofv0 14529 tpf1ofv1 14530 tpf1ofv2 14531 tpfo 14533 f1oun2prg 14950 01sqrexlem7 15295 bpoly4 16109 fsumcube 16110 sin01bnd 16237 egt2lt3 16258 rpnnen2lem2 16267 rpnnen2lem3 16268 rpnnen2lem4 16269 rpnnen2lem9 16274 rpnnen2lem11 16276 5ndvds3 16467 3lcm2e6woprm 16669 3lcm2e6 16787 prmo3 17097 5prm 17164 6nprm 17165 7prm 17166 9nprm 17168 11prm 17171 13prm 17172 17prm 17173 19prm 17174 23prm 17175 prmlem2 17176 37prm 17177 43prm 17178 83prm 17179 139prm 17180 163prm 17181 317prm 17182 631prm 17183 1259lem5 17191 2503lem1 17193 2503lem2 17194 2503lem3 17195 4001lem4 17200 4001prm 17201 mulrndx 17343 mulridx 17344 rngstr 17347 unifndx 17444 unifid 17445 unifndxnn 17446 slotsdifunifndx 17450 lt6abl 19961 cnfldstr 21489 tangtx 26632 1cubrlem 26968 1cubr 26969 dcubic1lem 26970 dcubic2 26971 dcubic 26973 mcubic 26974 cubic2 26975 cubic 26976 quartlem3 26986 quart 26988 log2cnv 27071 log2tlbnd 27072 log2ublem1 27073 log2ublem2 27074 log2ub 27076 ppiublem1 27328 ppiub 27330 chtub 27338 bposlem3 27412 bposlem4 27413 bposlem5 27414 bposlem6 27415 bposlem9 27418 lgsdir2lem5 27455 dchrvmasumlem2 27624 dchrvmasumlema 27626 pntleml 27737 tgcgr4 28762 axlowdimlem16 29244 axlowdimlem17 29245 usgrexmpldifpr 29545 upgr3v3e3cycl 30468 ex-cnv 30725 ex-rn 30728 ex-mod 30737 2sqr3minply 34111 cos9thpiminplylem1 34113 cos9thpiminplylem2 34114 cos9thpiminplylem5 34117 fib4 34735 circlevma 34970 circlemethhgt 34971 hgt750lema 34985 sinccvglem 36059 cnndvlem1 37011 mblfinlem3 38193 itg2addnclem2 38206 itg2addnc 38208 lcm3un 42667 aks4d1p1 42728 3cubeslem2 43301 3cubeslem3r 43303 3cubes 43306 rmydioph 43626 rmxdioph 43628 expdiophlem2 43634 expdioph 43635 amgm3d 44810 lhe4.4ex1a 44924 modm2nep1 47991 modm1nep2 47993 257prm 48195 fmtno4prmfac193 48207 fmtno4nprmfac193 48208 3ndvds4 48229 139prmALT 48230 31prm 48231 127prm 48233 41prothprm 48253 341fppr2 48381 nfermltl2rev 48390 wtgoldbnnsum4prm 48449 bgoldbnnsum3prm 48451 bgoldbtbndlem1 48452 tgoldbach 48464 grtriclwlk3 48592 gpg3kgrtriexlem2 48731 gpg3kgrtriexlem5 48734 gpg3kgrtriexlem6 48735 gpg3kgrtriex 48736 |
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