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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 12446 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12456 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12387 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2860 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 (class class class)co 7451 1c1 11240 + caddc 11242 ℕcn 12375 2c2 12437 3c3 12438 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 ax-un 7783 ax-1cn 11297 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7454 df-om 7912 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-nn 12376 df-2 12445 df-3 12446 |
| This theorem is used by: 4nn 12466 3pos 12491 3ne0 12492 3nn0 12664 3z 12769 ige3m2fz 13722 fvf1tp 13969 tpf1ofv0 14682 tpf1ofv1 14683 tpf1ofv2 14684 tpfo 14686 f1oun2prg 15111 01sqrexlem7 15458 bpoly4 16269 fsumcube 16270 sin01bnd 16397 egt2lt3 16418 rpnnen2lem2 16427 rpnnen2lem3 16428 rpnnen2lem4 16429 rpnnen2lem9 16434 rpnnen2lem11 16436 5ndvds3 16627 3lcm2e6woprm 16834 3lcm2e6 16952 prmo3 17263 5prm 17330 6nprm 17331 7prm 17332 9nprm 17334 11prm 17337 13prm 17338 17prm 17339 19prm 17340 23prm 17341 prmlem2 17342 37prm 17343 43prm 17344 83prm 17345 139prm 17346 163prm 17347 317prm 17348 631prm 17349 1259lem5 17357 2503lem1 17359 2503lem2 17360 2503lem3 17361 4001lem4 17366 4001prm 17367 mulrndx 17511 mulridx 17512 rngstr 17515 unifndx 17612 unifid 17613 unifndxnn 17614 slotsdifunifndx 17618 lt6abl 20160 cnfldstr 21731 tangtx 26891 1cubrlem 27226 1cubr 27227 dcubic1lem 27228 dcubic2 27229 dcubic 27231 mcubic 27232 cubic2 27233 cubic 27234 quartlem3 27244 quart 27246 log2cnv 27329 log2tlbnd 27330 log2ublem1 27331 log2ublem2 27332 log2ub 27334 ppiublem1 27586 ppiub 27588 chtub 27596 bposlem3 27670 bposlem4 27671 bposlem5 27672 bposlem6 27673 bposlem9 27676 lgsdir2lem5 27713 dchrvmasumlem2 27882 dchrvmasumlema 27884 pntleml 27995 fltoprm 28052 tgcgr4 29051 axlowdimlem16 29592 axlowdimlem17 29593 usgrexmpldifpr 29896 upgr3v3e3cycl 30838 ex-cnv 31095 ex-rn 31098 ex-mod 31107 2sqr3minply 34523 cos9thpiminplylem1 34525 cos9thpiminplylem2 34526 cos9thpiminplylem5 34529 fib4 35147 circlevma 35382 circlemethhgt 35383 hgt750lema 35397 sinccvglem 36645 cnndvlem1 37618 mblfinlem3 38845 itg2addnclem2 38858 itg2addnc 38860 lcm3un 43331 aks4d1p1 43392 3cubeslem2 43961 3cubeslem3r 43963 3cubes 43966 rmydioph 44287 rmxdioph 44289 expdiophlem2 44295 expdioph 44296 amgm3d 45460 lhe4.4ex1a 45574 modm2nep1 48715 modm1nep2 48717 257prm 48919 fmtno4prmfac193 48931 fmtno4nprmfac193 48932 3ndvds4 48953 139prmALT 48954 31prm 48955 127prm 48957 41prothprm 48977 341fppr2 49105 nfermltl2rev 49114 wtgoldbnnsum4prm 49173 bgoldbnnsum3prm 49175 bgoldbtbndlem1 49176 tgoldbach 49188 grtriclwlk3 49316 gpg3kgrtriexlem2 49455 gpg3kgrtriexlem5 49458 gpg3kgrtriexlem6 49459 gpg3kgrtriex 49460 bru3val 49753 bru3cj 49754 bru3sqbru 49757 bru3sqez 49758 ezsubrg 49759 1elfz13 51371 2elfz13 51372 3elfz13 51373 veronesevrowd 51407 veroquadgsumlem 51411 |
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