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Mirrors > Home > MPE Home > Th. List > eluz2b2 | Structured version Visualization version GIF version |
Description: Two ways to say "an integer greater than or equal to 2". (Contributed by Paul Chapman, 23-Nov-2012.) |
Ref | Expression |
---|---|
eluz2b2 | ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 1 < 𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eluz2b1 12933 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℤ ∧ 1 < 𝑁)) | |
2 | 1re 11244 | . . . . . . 7 ⊢ 1 ∈ ℝ | |
3 | zre 12592 | . . . . . . 7 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
4 | ltle 11332 | . . . . . . 7 ⊢ ((1 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (1 < 𝑁 → 1 ≤ 𝑁)) | |
5 | 2, 3, 4 | sylancr 586 | . . . . . 6 ⊢ (𝑁 ∈ ℤ → (1 < 𝑁 → 1 ≤ 𝑁)) |
6 | 5 | imdistani 568 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 1 < 𝑁) → (𝑁 ∈ ℤ ∧ 1 ≤ 𝑁)) |
7 | elnnz1 12618 | . . . . 5 ⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℤ ∧ 1 ≤ 𝑁)) | |
8 | 6, 7 | sylibr 233 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 1 < 𝑁) → 𝑁 ∈ ℕ) |
9 | simpr 484 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 1 < 𝑁) → 1 < 𝑁) | |
10 | 8, 9 | jca 511 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 1 < 𝑁) → (𝑁 ∈ ℕ ∧ 1 < 𝑁)) |
11 | nnz 12609 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ) | |
12 | 11 | anim1i 614 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 1 < 𝑁) → (𝑁 ∈ ℤ ∧ 1 < 𝑁)) |
13 | 10, 12 | impbii 208 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 1 < 𝑁) ↔ (𝑁 ∈ ℕ ∧ 1 < 𝑁)) |
14 | 1, 13 | bitri 275 | 1 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 1 < 𝑁)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∈ wcel 2099 class class class wbr 5148 ‘cfv 6548 ℝcr 11137 1c1 11139 < clt 11278 ≤ cle 11279 ℕcn 12242 2c2 12297 ℤcz 12588 ℤ≥cuz 12852 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-2nd 7994 df-frecs 8286 df-wrecs 8317 df-recs 8391 df-rdg 8430 df-er 8724 df-en 8964 df-dom 8965 df-sdom 8966 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-nn 12243 df-2 12305 df-n0 12503 df-z 12589 df-uz 12853 |
This theorem is referenced by: eluz2b3 12936 nprmi 16659 ge2nprmge4 16671 pockthlem 16873 prmunb 16882 prmlem1a 17075 sylow3lem6 19586 chtge0 27043 muval1 27064 chtwordi 27087 vma1 27097 mersenne 27159 perfectlem2 27162 lgsne0 27267 chtppilimlem1 27405 padicabvcxp 27564 ostth2lem3 27567 ostth2lem4 27568 ostth2 27569 ostth3 27570 umgr2cwwkdifex 29874 ex-mod 30258 rmspecnonsq 42327 rmspecfund 42329 ltrmxnn0 42370 itgsinexp 45343 wallispilem3 45455 fmtno4prm 46915 perfectALTVlem2 47062 |
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