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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 12399 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2nn 12409 | . . 3 ⊢ 2 ∈ ℕ | |
| 3 | peano2nn 12340 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2857 | 1 ⊢ 3 ∈ ℕ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 (class class class)co 7418 1c1 11194 + caddc 11196 ℕcn 12328 2c2 12390 3c3 12391 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pr 5391 ax-un 7749 ax-1cn 11251 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-nn 12329 df-2 12398 df-3 12399 |
| This theorem is used by: 4nn 12419 3pos 12444 3ne0 12445 3nn0 12617 3z 12722 ige3m2fz 13675 fvf1tp 13922 tpf1ofv0 14634 tpf1ofv1 14635 tpf1ofv2 14636 tpfo 14638 f1oun2prg 15061 01sqrexlem7 15408 bpoly4 16218 fsumcube 16219 sin01bnd 16346 egt2lt3 16367 rpnnen2lem2 16376 rpnnen2lem3 16377 rpnnen2lem4 16378 rpnnen2lem9 16383 rpnnen2lem11 16385 5ndvds3 16576 3lcm2e6woprm 16783 3lcm2e6 16901 prmo3 17212 5prm 17279 6nprm 17280 7prm 17281 9nprm 17283 11prm 17286 13prm 17287 17prm 17288 19prm 17289 23prm 17290 prmlem2 17291 37prm 17292 43prm 17293 83prm 17294 139prm 17295 163prm 17296 317prm 17297 631prm 17298 1259lem5 17306 2503lem1 17308 2503lem2 17309 2503lem3 17310 4001lem4 17315 4001prm 17316 mulrndx 17458 mulridx 17459 rngstr 17462 unifndx 17559 unifid 17560 unifndxnn 17561 slotsdifunifndx 17565 lt6abl 20102 cnfldstr 21673 tangtx 26827 1cubrlem 27162 1cubr 27163 dcubic1lem 27164 dcubic2 27165 dcubic 27167 mcubic 27168 cubic2 27169 cubic 27170 quartlem3 27180 quart 27182 log2cnv 27265 log2tlbnd 27266 log2ublem1 27267 log2ublem2 27268 log2ub 27270 ppiublem1 27522 ppiub 27524 chtub 27532 bposlem3 27606 bposlem4 27607 bposlem5 27608 bposlem6 27609 bposlem9 27612 lgsdir2lem5 27649 dchrvmasumlem2 27818 dchrvmasumlema 27820 pntleml 27931 fltoprm 27988 tgcgr4 28987 axlowdimlem16 29528 axlowdimlem17 29529 usgrexmpldifpr 29832 upgr3v3e3cycl 30774 ex-cnv 31031 ex-rn 31034 ex-mod 31043 2sqr3minply 34405 cos9thpiminplylem1 34407 cos9thpiminplylem2 34408 cos9thpiminplylem5 34411 fib4 35029 circlevma 35264 circlemethhgt 35265 hgt750lema 35279 sinccvglem 36416 cnndvlem1 37383 mblfinlem3 38557 itg2addnclem2 38570 itg2addnc 38572 lcm3un 43045 aks4d1p1 43106 3cubeslem2 43675 3cubeslem3r 43677 3cubes 43680 rmydioph 44000 rmxdioph 44002 expdiophlem2 44008 expdioph 44009 amgm3d 45184 lhe4.4ex1a 45298 modm2nep1 48411 modm1nep2 48413 257prm 48615 fmtno4prmfac193 48627 fmtno4nprmfac193 48628 3ndvds4 48649 139prmALT 48650 31prm 48651 127prm 48653 41prothprm 48673 341fppr2 48801 nfermltl2rev 48810 wtgoldbnnsum4prm 48869 bgoldbnnsum3prm 48871 bgoldbtbndlem1 48872 tgoldbach 48884 grtriclwlk3 49012 gpg3kgrtriexlem2 49151 gpg3kgrtriexlem5 49154 gpg3kgrtriexlem6 49155 gpg3kgrtriex 49156 1elfz13 50912 2elfz13 50913 3elfz13 50914 veronesevrowd 50948 veroquadgsumlem 50952 |
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