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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 10957 | . 2 ⊢ 3 = (2 + 1) | |
2 | 2nn 11062 | . . 3 ⊢ 2 ∈ ℕ | |
3 | peano2nn 10909 | . . 3 ⊢ (2 ∈ ℕ → (2 + 1) ∈ ℕ) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ (2 + 1) ∈ ℕ |
5 | 1, 4 | eqeltri 2684 | 1 ⊢ 3 ∈ ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 1c1 9816 + caddc 9818 ℕcn 10897 2c2 10947 3c3 10948 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-1cn 9873 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-om 6958 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-nn 10898 df-2 10956 df-3 10957 |
This theorem is referenced by: 4nn 11064 3nn0 11187 3z 11287 ige3m2fz 12236 f1oun2prg 13512 sqrlem7 13837 bpoly4 14629 fsumcube 14630 ef01bndlem 14753 sin01bnd 14754 egt2lt3 14773 rpnnen2lem2 14783 rpnnen2lem3 14784 rpnnen2lem4 14785 rpnnen2lem9 14790 rpnnen2lem11 14792 3lcm2e6woprm 15166 3lcm2e6 15278 prmo3 15583 5prm 15653 6nprm 15654 7prm 15655 9nprm 15657 11prm 15660 13prm 15661 17prm 15662 19prm 15663 23prm 15664 prmlem2 15665 37prm 15666 43prm 15667 83prm 15668 139prm 15669 163prm 15670 317prm 15671 631prm 15672 1259lem5 15680 2503lem1 15682 2503lem2 15683 2503lem3 15684 4001lem4 15689 4001prm 15690 mulrndx 15821 mulrid 15822 rngstr 15823 ressmulr 15829 unifndx 15887 unifid 15888 lt6abl 18119 sramulr 19001 opsrmulr 19302 cnfldstr 19569 zlmmulr 19687 znmul 19709 ressunif 21876 tuslem 21881 tngmulr 22258 vitalilem4 23186 tangtx 24061 1cubrlem 24368 1cubr 24369 dcubic1lem 24370 dcubic2 24371 dcubic 24373 mcubic 24374 cubic2 24375 cubic 24376 quartlem3 24386 quart 24388 log2cnv 24471 log2tlbnd 24472 log2ublem1 24473 log2ublem2 24474 log2ub 24476 ppiublem1 24727 ppiub 24729 chtub 24737 bposlem3 24811 bposlem4 24812 bposlem5 24813 bposlem6 24814 bposlem9 24817 lgsdir2lem5 24854 dchrvmasumlem2 24987 dchrvmasumlema 24989 pntibndlem1 25078 pntibndlem2 25080 pntlema 25085 pntlemb 25086 pntleml 25100 tgcgr4 25226 axlowdimlem16 25637 axlowdimlem17 25638 usgraexmpldifpr 25928 constr3trllem3 26180 ex-cnv 26686 ex-rn 26689 ex-mod 26698 resvmulr 29166 fib4 29793 sinccvglem 30820 cnndvlem1 31698 mblfinlem3 32618 itg2addnclem2 32632 itg2addnclem3 32633 itg2addnc 32634 hlhilsmul 36251 rmydioph 36599 rmxdioph 36601 expdiophlem2 36607 expdioph 36608 amgm3d 37524 lhe4.4ex1a 37550 257prm 40011 fmtno4prmfac193 40023 fmtno4nprmfac193 40024 3ndvds4 40048 139prmALT 40049 31prm 40050 127prm 40053 41prothprm 40074 wtgoldbnnsum4prm 40218 bgoldbnnsum3prm 40220 bgoldbtbndlem1 40221 tgoldbach 40232 tgoldbachOLD 40239 upgr3v3e3cycl 41347 |
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