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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 12305 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12315 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12246 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2859 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 (class class class)co 7412 1c1 11102 + caddc 11104 ℕcn 12234 2c2 12296 3c3 12297 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pr 5406 ax-un 7734 ax-1cn 11159 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7415 df-om 7864 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-nn 12235 df-2 12304 df-3 12305 |
| This theorem is referenced by: 4nn 12325 3pos 12350 3ne0 12351 3nn0 12523 3z 12628 ige3m2fz 13578 fvf1tp 13824 tpf1ofv0 14535 tpf1ofv1 14536 tpf1ofv2 14537 tpfo 14539 f1oun2prg 14956 01sqrexlem7 15301 bpoly4 16114 fsumcube 16115 sin01bnd 16242 egt2lt3 16263 rpnnen2lem2 16272 rpnnen2lem3 16273 rpnnen2lem4 16274 rpnnen2lem9 16279 rpnnen2lem11 16281 5ndvds3 16472 3lcm2e6woprm 16674 3lcm2e6 16792 prmo3 17102 5prm 17169 6nprm 17170 7prm 17171 9nprm 17173 11prm 17176 13prm 17177 17prm 17178 19prm 17179 23prm 17180 prmlem2 17181 37prm 17182 43prm 17183 83prm 17184 139prm 17185 163prm 17186 317prm 17187 631prm 17188 1259lem5 17196 2503lem1 17198 2503lem2 17199 2503lem3 17200 4001lem4 17205 4001prm 17206 mulrndx 17348 mulridx 17349 rngstr 17352 unifndx 17449 unifid 17450 unifndxnn 17451 slotsdifunifndx 17455 lt6abl 19966 cnfldstr 21505 tangtx 26651 1cubrlem 26987 1cubr 26988 dcubic1lem 26989 dcubic2 26990 dcubic 26992 mcubic 26993 cubic2 26994 cubic 26995 quartlem3 27005 quart 27007 log2cnv 27090 log2tlbnd 27091 log2ublem1 27092 log2ublem2 27093 log2ub 27095 ppiublem1 27347 ppiub 27349 chtub 27357 bposlem3 27431 bposlem4 27432 bposlem5 27433 bposlem6 27434 bposlem9 27437 lgsdir2lem5 27474 dchrvmasumlem2 27643 dchrvmasumlema 27645 pntleml 27756 tgcgr4 28781 axlowdimlem16 29288 axlowdimlem17 29289 usgrexmpldifpr 29589 upgr3v3e3cycl 30512 ex-cnv 30769 ex-rn 30772 ex-mod 30781 2sqr3minply 34151 cos9thpiminplylem1 34153 cos9thpiminplylem2 34154 cos9thpiminplylem5 34157 fib4 34775 circlevma 35010 circlemethhgt 35011 hgt750lema 35025 sinccvglem 36145 cnndvlem1 37107 mblfinlem3 38291 itg2addnclem2 38304 itg2addnc 38306 lcm3un 42763 aks4d1p1 42824 3cubeslem2 43399 3cubeslem3r 43401 3cubes 43404 rmydioph 43724 rmxdioph 43726 expdiophlem2 43732 expdioph 43733 amgm3d 44908 lhe4.4ex1a 45022 modm2nep1 48092 modm1nep2 48094 257prm 48296 fmtno4prmfac193 48308 fmtno4nprmfac193 48309 3ndvds4 48330 139prmALT 48331 31prm 48332 127prm 48334 41prothprm 48354 341fppr2 48482 nfermltl2rev 48491 wtgoldbnnsum4prm 48550 bgoldbnnsum3prm 48552 bgoldbtbndlem1 48553 tgoldbach 48565 grtriclwlk3 48693 gpg3kgrtriexlem2 48832 gpg3kgrtriexlem5 48835 gpg3kgrtriexlem6 48836 gpg3kgrtriex 48837 |
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