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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 12180 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12189 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12128 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2824 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2109 (class class class)co 7340 1c1 10998 + caddc 11000 ℕcn 12116 2c2 12171 3c3 12172 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5231 ax-nul 5241 ax-pr 5367 ax-un 7662 ax-1cn 11055 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-reu 3344 df-rab 3393 df-v 3435 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-iun 4940 df-br 5089 df-opab 5151 df-mpt 5170 df-tr 5196 df-id 5508 df-eprel 5513 df-po 5521 df-so 5522 df-fr 5566 df-we 5568 df-xp 5619 df-rel 5620 df-cnv 5621 df-co 5622 df-dm 5623 df-rn 5624 df-res 5625 df-ima 5626 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-ov 7343 df-om 7791 df-2nd 7916 df-frecs 8205 df-wrecs 8236 df-recs 8285 df-rdg 8323 df-nn 12117 df-2 12179 df-3 12180 |
| This theorem is referenced by: 4nn 12199 3ne0 12222 3nn0 12390 3z 12496 ige3m2fz 13439 fvf1tp 13681 tpf1ofv0 14391 tpf1ofv1 14392 tpf1ofv2 14393 tpfo 14395 f1oun2prg 14811 01sqrexlem7 15142 bpoly4 15953 fsumcube 15954 sin01bnd 16081 egt2lt3 16102 rpnnen2lem2 16111 rpnnen2lem3 16112 rpnnen2lem4 16113 rpnnen2lem9 16118 rpnnen2lem11 16120 5ndvds3 16311 3lcm2e6woprm 16513 3lcm2e6 16630 prmo3 16940 5prm 17007 6nprm 17008 7prm 17009 9nprm 17011 11prm 17013 13prm 17014 17prm 17015 19prm 17016 23prm 17017 prmlem2 17018 37prm 17019 43prm 17020 83prm 17021 139prm 17022 163prm 17023 317prm 17024 631prm 17025 1259lem5 17033 2503lem1 17035 2503lem2 17036 2503lem3 17037 4001lem4 17042 4001prm 17043 mulrndx 17185 mulridx 17186 rngstr 17189 unifndx 17286 unifid 17287 unifndxnn 17288 slotsdifunifndx 17292 lt6abl 19761 cnfldstr 21247 cnfldstrOLD 21262 tangtx 26395 1cubrlem 26732 1cubr 26733 dcubic1lem 26734 dcubic2 26735 dcubic 26737 mcubic 26738 cubic2 26739 cubic 26740 quartlem3 26750 quart 26752 log2cnv 26835 log2tlbnd 26836 log2ublem1 26837 log2ublem2 26838 log2ub 26840 ppiublem1 27094 ppiub 27096 chtub 27104 bposlem3 27178 bposlem4 27179 bposlem5 27180 bposlem6 27181 bposlem9 27184 lgsdir2lem5 27221 dchrvmasumlem2 27390 dchrvmasumlema 27392 pntleml 27503 tgcgr4 28463 axlowdimlem16 28889 axlowdimlem17 28890 usgrexmpldifpr 29190 upgr3v3e3cycl 30111 ex-cnv 30368 ex-rn 30371 ex-mod 30380 2sqr3minply 33761 cos9thpiminplylem1 33763 cos9thpiminplylem2 33764 cos9thpiminplylem5 33767 fib4 34385 circlevma 34623 circlemethhgt 34624 hgt750lema 34638 sinccvglem 35662 cnndvlem1 36528 mblfinlem3 37656 itg2addnclem2 37669 itg2addnc 37671 lcm3un 42005 aks4d1p1 42066 3cubeslem2 42675 3cubeslem3r 42677 3cubes 42680 rmydioph 43004 rmxdioph 43006 expdiophlem2 43012 expdioph 43013 amgm3d 44189 lhe4.4ex1a 44319 modm2nep1 47364 modm1nep2 47366 257prm 47559 fmtno4prmfac193 47571 fmtno4nprmfac193 47572 3ndvds4 47593 139prmALT 47594 31prm 47595 127prm 47597 41prothprm 47617 341fppr2 47732 nfermltl2rev 47741 wtgoldbnnsum4prm 47800 bgoldbnnsum3prm 47802 bgoldbtbndlem1 47803 tgoldbach 47815 grtriclwlk3 47943 gpg3kgrtriexlem2 48082 gpg3kgrtriexlem5 48085 gpg3kgrtriexlem6 48086 gpg3kgrtriex 48087 |
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