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| Mirrors > Home > MPE Home > Th. List > 5nn | Structured version Visualization version GIF version | ||
| Description: 5 is a positive integer. (Contributed by Mario Carneiro, 15-Sep-2013.) |
| Ref | Expression |
|---|---|
| 5nn | ⊢ 5 ∈ ℕ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-5 12317 | . 2 ⊢ 5 = (4 + 1) | |
| 2 | 4nn 12335 | . . 3 ⊢ 4 ∈ ℕ | |
| 3 | peano2nn 12256 | . . 3 ⊢ (4 ∈ ℕ → (4 + 1) ∈ ℕ) | |
| 4 | 2, 3 | ax-mp 5 | . 2 ⊢ (4 + 1) ∈ ℕ |
| 5 | 1, 4 | eqeltri 2861 | 1 ⊢ 5 ∈ ℕ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 (class class class)co 7416 1c1 11112 + caddc 11114 ℕcn 12244 4c4 12308 5c5 12309 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 ax-un 7738 ax-1cn 11169 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 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 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7419 df-om 7865 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-nn 12245 df-2 12314 df-3 12315 df-4 12316 df-5 12317 |
| This theorem is used by: 6nn 12341 5pos 12364 5nn0 12535 5eluz3 12918 5ndvds3 16488 5ndvds6 16489 prm23ge5 16892 dec5dvds 17141 dec5nprm 17143 dec2nprm 17144 5prm 17185 10nprmOLD 17191 23prm 17196 prmlem2 17197 43prm 17199 83prm 17200 317prm 17203 prmo5 17206 scandx 17384 scaid 17385 lmodstr 17395 ipsstr 17406 ccondx 17483 ccoid 17484 slotsbhcdif 17485 slotsdifplendx2 17486 slotsdifocndx 17487 prdsvalstr 17522 catstr 18034 lt6abl 19988 psrvalstr 22095 log2ublem1 27140 log2ublem2 27141 log2ub 27143 birthday 27148 ppiublem1 27395 ppiublem2 27396 ppiub 27397 bclbnd 27473 bposlem3 27479 bposlem4 27480 bposlem5 27481 bposlem6 27482 bposlem8 27484 bposlem9 27485 lgsdir2lem3 27520 ex-eprel 30813 ex-xp 30816 fib6 34820 hgt750lem2 35063 hgt750leme 35069 12gcd5e1 42803 12lcm5e60 42808 lcm5un 42817 lcmineqlem 42852 3lexlogpow5ineq1 42854 3lexlogpow2ineq1 42858 3lexlogpow2ineq2 42859 3lexlogpow5ineq5 42860 aks4d1p1p6 42873 aks4d1p1 42876 5ne0 43060 rmydioph 43774 expdiophlem2 43782 algstr 43933 inductionexd 44914 goldratmolem2 47656 plusmod5ne 48121 minusmod5ne 48125 minusmodnep2tmod 48129 8mod5e3 48136 257prm 48346 fmtno4prmfac193 48358 31prm 48382 41prothprm 48404 gbowge7 48561 gbege6 48563 stgoldbwt 48574 sbgoldbwt 48575 sbgoldbm 48582 sbgoldbo 48585 nnsum3primesle9 48592 gpg5order 48858 gpg5nbgrvtx13starlem1 48869 gpg5nbgrvtx13starlem2 48870 gpg5nbgrvtx13starlem3 48871 gpg5nbgr3star 48879 gpg5grlim 48891 pgnioedg1 48906 pgnioedg2 48907 pgnioedg3 48908 pgnioedg4 48909 pgnbgreunbgrlem1 48911 pgnbgreunbgrlem2lem1 48912 pgnbgreunbgrlem2lem2 48913 pgnbgreunbgrlem2lem3 48914 pgnbgreunbgrlem4 48917 gpg5edgnedg 48928 grlimedgnedg 48929 |
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