elnnz - Metamath Proof Explorer

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Theorem elnnz 12564

Description: Positive integer property expressed in terms of integers. (Contributed by NM, 8-Jan-2002.)

**Assertion**
Ref	Expression
elnnz	⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℤ ∧ 0 < 𝑁))

**Proof of Theorem elnnz**
Step	Hyp	Ref	Expression
1		nnre 12215	. . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ)
2		orc 865	. . . 4 ⊢ (𝑁 ∈ ℕ → (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)))
3		nngt0 12239	. . . 4 ⊢ (𝑁 ∈ ℕ → 0 < 𝑁)
4	1, 2, 3	jca31 515	. . 3 ⊢ (𝑁 ∈ ℕ → ((𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) ∧ 0 < 𝑁))
5		idd 24	. . . . . . 7 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → (𝑁 ∈ ℕ → 𝑁 ∈ ℕ))
6		lt0neg2 11717	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℝ → (0 < 𝑁 ↔ -𝑁 < 0))
7		renegcl 11519	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℝ → -𝑁 ∈ ℝ)
8		0re 11212	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℝ
9		ltnsym 11308	. . . . . . . . . . . . 13 ⊢ ((-𝑁 ∈ ℝ ∧ 0 ∈ ℝ) → (-𝑁 < 0 → ¬ 0 < -𝑁))
10	7, 8, 9	sylancl 586	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℝ → (-𝑁 < 0 → ¬ 0 < -𝑁))
11	6, 10	sylbid 239	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℝ → (0 < 𝑁 → ¬ 0 < -𝑁))
12	11	imp 407	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ¬ 0 < -𝑁)
13		nngt0 12239	. . . . . . . . . 10 ⊢ (-𝑁 ∈ ℕ → 0 < -𝑁)
14	12, 13	nsyl 140	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ¬ -𝑁 ∈ ℕ)
15		gt0ne0 11675	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → 𝑁 ≠ 0)
16	15	neneqd 2945	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ¬ 𝑁 = 0)
17		ioran 982	. . . . . . . . 9 ⊢ (¬ (-𝑁 ∈ ℕ ∨ 𝑁 = 0) ↔ (¬ -𝑁 ∈ ℕ ∧ ¬ 𝑁 = 0))
18	14, 16, 17	sylanbrc 583	. . . . . . . 8 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ¬ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))
19	18	pm2.21d 121	. . . . . . 7 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ((-𝑁 ∈ ℕ ∨ 𝑁 = 0) → 𝑁 ∈ ℕ))
20	5, 19	jaod 857	. . . . . 6 ⊢ ((𝑁 ∈ ℝ ∧ 0 < 𝑁) → ((𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)) → 𝑁 ∈ ℕ))
21	20	ex 413	. . . . 5 ⊢ (𝑁 ∈ ℝ → (0 < 𝑁 → ((𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)) → 𝑁 ∈ ℕ)))
22	21	com23 86	. . . 4 ⊢ (𝑁 ∈ ℝ → ((𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)) → (0 < 𝑁 → 𝑁 ∈ ℕ)))
23	22	imp31 418	. . 3 ⊢ (((𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) ∧ 0 < 𝑁) → 𝑁 ∈ ℕ)
24	4, 23	impbii 208	. 2 ⊢ (𝑁 ∈ ℕ ↔ ((𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) ∧ 0 < 𝑁))
25		elz 12556	. . . 4 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)))
26		3orrot 1092	. . . . . 6 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ ∨ 𝑁 = 0))
27		3orass 1090	. . . . . 6 ⊢ ((𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ ∨ 𝑁 = 0) ↔ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)))
28	26, 27	bitri 274	. . . . 5 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)))
29	28	anbi2i 623	. . . 4 ⊢ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))))
30	25, 29	bitri 274	. . 3 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))))
31	30	anbi1i 624	. 2 ⊢ ((𝑁 ∈ ℤ ∧ 0 < 𝑁) ↔ ((𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) ∧ 0 < 𝑁))
32	24, 31	bitr4i 277	1 ⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℤ ∧ 0 < 𝑁))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 ∨ w3o 1086 = wceq 1541 ∈ wcel 2106 class class class wbr 5147 ℝcr 11105 0cc0 11106 < clt 11244 -cneg 11441 ℕcn 12208 ℤcz 12554

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-z 12555

This theorem is referenced by: elnn0z 12567 elnnz1 12584 znnsub 12604 nn0ge0div 12627 msqznn 12640 elpq 12955 lbfzo0 13668 elfzo0z 13670 fzofzim 13675 fzo1fzo0n0 13679 elfzodifsumelfzo 13694 elfznelfzo 13733 nnesq 14186 swrdlsw 14613 pfxccatin12lem3 14678 repswswrd 14730 cshwcsh2id 14775 swrd2lsw 14899 2swrd2eqwrdeq 14900 nnabscl 15268 iseralt 15627 sqrt2irrlem 16187 p1modz1 16200 nndivdvds 16202 oddge22np1 16288 evennn2n 16290 nno 16321 nnoddm1d2 16325 ndvdsadd 16349 bitsfzolem 16371 sqgcd 16498 qredeu 16591 prmind2 16618 qgt0numnn 16683 oddprm 16739 pythagtriplem6 16750 pythagtriplem11 16754 pythagtriplem13 16756 pythagtriplem19 16762 pc2dvds 16808 pcadd 16818 prmreclem3 16847 4sqlem11 16884 4sqlem12 16885 prmgaplem7 16986 cshwshashlem2 17026 subgmulg 19014 znidomb 21108 sgmnncl 26640 muinv 26686 mersenne 26719 bposlem6 26781 gausslemma2dlem1a 26857 lgseisenlem1 26867 lgsquadlem1 26872 lgsquadlem2 26873 2sqlem8 26918 2sqnn0 26930 dchrisum0flblem2 27001 clwlkclwwlklem2a2 29235 clwlkclwwlklem2a4 29239 clwlkclwwlklem2a 29240 eucrct2eupth1 29486 nn0prpwlem 35195 poimirlem7 36483 poimirlem29 36505 mblfinlem2 36514 lcmineqlem15 40896 lcmineqlem23 40904 aks4d1lem1 40915 aks4d1p1p2 40923 aks4d1p1 40929 aks4d1p2 40930 aks4d1p3 40931 aks4d1p5 40933 aks4d1p6 40934 aks4d1p7d1 40935 aks4d1p8 40940 2ap1caineq 40949 posqsqznn 41229 rtprmirr 41233 dffltz 41372 irrapxlem4 41548 rmspecnonsq 41630 rmynn 41680 jm2.24 41687 jm2.23 41720 jm2.20nn 41721 jm2.27a 41729 jm2.27c 41731 rmydioph 41738 jm3.1lem3 41743 sumnnodd 44332 dvnxpaek 44644 dirkertrigeqlem3 44802 fourierdlem47 44855 fouriersw 44933 etransclem15 44951 etransclem24 44960 etransclem25 44961 etransclem35 44971 etransclem48 44984 zm1nn 45996 iccpartigtl 46077 nnoALTV 46349 nneven 46352 ztprmneprm 46976 blennngt2o2 47231

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