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Mirrors > Home > MPE Home > Th. List > elznn0 | Structured version Visualization version GIF version |
Description: Integer property expressed in terms of nonnegative integers. (Contributed by NM, 9-May-2004.) |
Ref | Expression |
---|---|
elznn0 | ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elz 12251 | . 2 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ))) | |
2 | elnn0 12165 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
3 | 2 | a1i 11 | . . . . 5 ⊢ (𝑁 ∈ ℝ → (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0))) |
4 | elnn0 12165 | . . . . . 6 ⊢ (-𝑁 ∈ ℕ0 ↔ (-𝑁 ∈ ℕ ∨ -𝑁 = 0)) | |
5 | recn 10892 | . . . . . . . . 9 ⊢ (𝑁 ∈ ℝ → 𝑁 ∈ ℂ) | |
6 | 0cn 10898 | . . . . . . . . 9 ⊢ 0 ∈ ℂ | |
7 | negcon1 11203 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℂ ∧ 0 ∈ ℂ) → (-𝑁 = 0 ↔ -0 = 𝑁)) | |
8 | 5, 6, 7 | sylancl 585 | . . . . . . . 8 ⊢ (𝑁 ∈ ℝ → (-𝑁 = 0 ↔ -0 = 𝑁)) |
9 | neg0 11197 | . . . . . . . . . 10 ⊢ -0 = 0 | |
10 | 9 | eqeq1i 2743 | . . . . . . . . 9 ⊢ (-0 = 𝑁 ↔ 0 = 𝑁) |
11 | eqcom 2745 | . . . . . . . . 9 ⊢ (0 = 𝑁 ↔ 𝑁 = 0) | |
12 | 10, 11 | bitri 274 | . . . . . . . 8 ⊢ (-0 = 𝑁 ↔ 𝑁 = 0) |
13 | 8, 12 | bitrdi 286 | . . . . . . 7 ⊢ (𝑁 ∈ ℝ → (-𝑁 = 0 ↔ 𝑁 = 0)) |
14 | 13 | orbi2d 912 | . . . . . 6 ⊢ (𝑁 ∈ ℝ → ((-𝑁 ∈ ℕ ∨ -𝑁 = 0) ↔ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) |
15 | 4, 14 | syl5bb 282 | . . . . 5 ⊢ (𝑁 ∈ ℝ → (-𝑁 ∈ ℕ0 ↔ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) |
16 | 3, 15 | orbi12d 915 | . . . 4 ⊢ (𝑁 ∈ ℝ → ((𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0) ↔ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)))) |
17 | 3orass 1088 | . . . . 5 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 = 0 ∨ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ))) | |
18 | orcom 866 | . . . . 5 ⊢ ((𝑁 = 0 ∨ (𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ ((𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ∨ 𝑁 = 0)) | |
19 | orordir 926 | . . . . 5 ⊢ (((𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ∨ 𝑁 = 0) ↔ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0))) | |
20 | 17, 18, 19 | 3bitrri 297 | . . . 4 ⊢ (((𝑁 ∈ ℕ ∨ 𝑁 = 0) ∨ (-𝑁 ∈ ℕ ∨ 𝑁 = 0)) ↔ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) |
21 | 16, 20 | bitr2di 287 | . . 3 ⊢ (𝑁 ∈ ℝ → ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) ↔ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) |
22 | 21 | pm5.32i 574 | . 2 ⊢ ((𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) |
23 | 1, 22 | bitri 274 | 1 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 ∈ ℕ0 ∨ -𝑁 ∈ ℕ0))) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ wa 395 ∨ wo 843 ∨ w3o 1084 = wceq 1539 ∈ wcel 2108 ℂcc 10800 ℝcr 10801 0cc0 10802 -cneg 11136 ℕcn 11903 ℕ0cn0 12163 ℤcz 12249 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-po 5494 df-so 5495 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-ltxr 10945 df-sub 11137 df-neg 11138 df-n0 12164 df-z 12250 |
This theorem is referenced by: elz2 12267 zmulcl 12299 expnegz 13745 expaddzlem 13754 odd2np1 15978 mulgz 18646 mulgdirlem 18649 mulgdir 18650 mulgass 18655 mulgdi 19343 cxpmul2z 25751 2sqnn0 26491 rexzrexnn0 40542 pell1234qrdich 40599 pell14qrexpcl 40605 pell14qrdich 40607 rmxnn 40689 jm2.19lem4 40730 |
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