Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > 4nn | Structured version Visualization version GIF version |
Description: 4 is a positive integer. (Contributed by NM, 8-Jan-2006.) |
Ref | Expression |
---|---|
4nn | ⊢ 4 ∈ ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-4 11703 | . 2 ⊢ 4 = (3 + 1) | |
2 | 3nn 11717 | . . 3 ⊢ 3 ∈ ℕ | |
3 | peano2nn 11650 | . . 3 ⊢ (3 ∈ ℕ → (3 + 1) ∈ ℕ) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ (3 + 1) ∈ ℕ |
5 | 1, 4 | eqeltri 2909 | 1 ⊢ 4 ∈ ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 (class class class)co 7156 1c1 10538 + caddc 10540 ℕcn 11638 3c3 11694 4c4 11695 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-1cn 10595 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-ov 7159 df-om 7581 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-nn 11639 df-2 11701 df-3 11702 df-4 11703 |
This theorem is referenced by: 5nn 11724 4nn0 11917 4z 12017 fldiv4p1lem1div2 13206 fldiv4lem1div2 13208 iexpcyc 13570 fsumcube 15414 ef01bndlem 15537 flodddiv4 15764 6lcm4e12 15960 2expltfac 16426 8nprm 16445 37prm 16454 43prm 16455 83prm 16456 139prm 16457 631prm 16460 prmo4 16461 1259prm 16469 2503lem2 16471 starvndx 16623 starvid 16624 ressstarv 16626 srngstr 16627 homndx 16687 homid 16688 resshom 16691 prdsvalstr 16726 oppchomfval 16984 oppcbas 16988 rescco 17102 catstr 17227 lt6abl 19015 pcoass 23628 minveclem3 24032 iblitg 24369 dveflem 24576 tan4thpi 25100 atan1 25506 log2tlbnd 25523 log2ub 25527 bclbnd 25856 bpos1 25859 bposlem6 25865 bposlem7 25866 bposlem8 25867 bposlem9 25868 gausslemma2dlem4 25945 m1lgs 25964 2lgslem1a 25967 2lgslem3a 25972 2lgslem3b 25973 2lgslem3c 25974 2lgslem3d 25975 2sqreultlem 26023 2sqreunnltlem 26026 chebbnd1lem1 26045 chebbnd1lem2 26046 chebbnd1lem3 26047 pntibndlem1 26165 pntibndlem2 26167 pntibndlem3 26168 pntlema 26172 pntlemb 26173 pntlemg 26174 pntlemf 26181 upgr4cycl4dv4e 27964 fib5 31663 hgt750lem2 31923 hgt750leme 31929 420gcd8e4 39127 420lcm8e840 39132 lcm4un 39137 rmydioph 39660 rmxdioph 39662 expdiophlem2 39668 inductionexd 40554 amgm4d 40602 257prm 43772 fmtno4sqrt 43782 fmtno4prmfac 43783 fmtno4prmfac193 43784 fmtno5nprm 43794 139prmALT 43808 mod42tp1mod8 43816 2exp340mod341 43947 341fppr2 43948 wtgoldbnnsum4prm 44016 bgoldbachlt 44027 tgblthelfgott 44029 |
Copyright terms: Public domain | W3C validator |