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| Mirrors > Home > ILE Home > Th. List > elnn0z | GIF version | ||
| Description: Nonnegative integer property expressed in terms of integers. (Contributed by NM, 9-May-2004.) |
| Ref | Expression |
|---|---|
| elnn0z | ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℤ ∧ 0 ≤ 𝑁)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0re 9577 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℝ) | |
| 2 | elnn0 9570 | . . . . . . 7 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) | |
| 3 | 2 | biimpi 120 | . . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∈ ℕ ∨ 𝑁 = 0)) |
| 4 | 3 | orcomd 741 | . . . . 5 ⊢ (𝑁 ∈ ℕ0 → (𝑁 = 0 ∨ 𝑁 ∈ ℕ)) |
| 5 | 3mix1 1197 | . . . . . 6 ⊢ (𝑁 = 0 → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) | |
| 6 | 3mix2 1198 | . . . . . 6 ⊢ (𝑁 ∈ ℕ → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) | |
| 7 | 5, 6 | jaoi 728 | . . . . 5 ⊢ ((𝑁 = 0 ∨ 𝑁 ∈ ℕ) → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) |
| 8 | 4, 7 | syl 14 | . . . 4 ⊢ (𝑁 ∈ ℕ0 → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) |
| 9 | elz 9651 | . . . 4 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℝ ∧ (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ))) | |
| 10 | 1, 8, 9 | sylanbrc 421 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℤ) |
| 11 | nn0ge0 9593 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 0 ≤ 𝑁) | |
| 12 | 10, 11 | jca 306 | . 2 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∈ ℤ ∧ 0 ≤ 𝑁)) |
| 13 | 9 | simprbi 275 | . . . 4 ⊢ (𝑁 ∈ ℤ → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) |
| 14 | 13 | adantr 276 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ)) |
| 15 | 0nn0 9583 | . . . . . 6 ⊢ 0 ∈ ℕ0 | |
| 16 | eleq1 2301 | . . . . . 6 ⊢ (𝑁 = 0 → (𝑁 ∈ ℕ0 ↔ 0 ∈ ℕ0)) | |
| 17 | 15, 16 | mpbiri 168 | . . . . 5 ⊢ (𝑁 = 0 → 𝑁 ∈ ℕ0) |
| 18 | 17 | a1i 9 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝑁 = 0 → 𝑁 ∈ ℕ0)) |
| 19 | nnnn0 9575 | . . . . 5 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℕ0) | |
| 20 | 19 | a1i 9 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝑁 ∈ ℕ → 𝑁 ∈ ℕ0)) |
| 21 | simpr 110 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 0 ≤ 𝑁) | |
| 22 | 0red 8328 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 0 ∈ ℝ) | |
| 23 | zre 9653 | . . . . . . . . 9 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
| 24 | 23 | adantr 276 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 𝑁 ∈ ℝ) |
| 25 | 22, 24 | lenltd 8446 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (0 ≤ 𝑁 ↔ ¬ 𝑁 < 0)) |
| 26 | 21, 25 | mpbid 147 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → ¬ 𝑁 < 0) |
| 27 | nngt0 9332 | . . . . . . 7 ⊢ (-𝑁 ∈ ℕ → 0 < -𝑁) | |
| 28 | 24 | lt0neg1d 8845 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (𝑁 < 0 ↔ 0 < -𝑁)) |
| 29 | 27, 28 | imbitrrid 156 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (-𝑁 ∈ ℕ → 𝑁 < 0)) |
| 30 | 26, 29 | mtod 673 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → ¬ -𝑁 ∈ ℕ) |
| 31 | 30 | pm2.21d 628 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → (-𝑁 ∈ ℕ → 𝑁 ∈ ℕ0)) |
| 32 | 18, 20, 31 | 3jaod 1345 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → ((𝑁 = 0 ∨ 𝑁 ∈ ℕ ∨ -𝑁 ∈ ℕ) → 𝑁 ∈ ℕ0)) |
| 33 | 14, 32 | mpd 13 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 0 ≤ 𝑁) → 𝑁 ∈ ℕ0) |
| 34 | 12, 33 | impbii 126 | 1 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℤ ∧ 0 ≤ 𝑁)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 720 ∨ w3o 1008 = wceq 1402 ∈ wcel 2209 class class class wbr 4130 ℝcr 8179 0cc0 8180 < clt 8361 ≤ cle 8362 -cneg 8500 ℕcn 9307 ℕ0cn0 9568 ℤcz 9649 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8271 ax-resscn 8272 ax-1cn 8273 ax-1re 8274 ax-icn 8275 ax-addcl 8276 ax-addrcl 8277 ax-mulcl 8278 ax-addcom 8280 ax-addass 8282 ax-distr 8284 ax-i2m1 8285 ax-0lt1 8286 ax-0id 8288 ax-rnegex 8289 ax-cnre 8291 ax-pre-ltirr 8292 ax-pre-ltwlin 8293 ax-pre-lttrn 8294 ax-pre-ltadd 8296 |
| This proof depends on definitions: df-bi 117 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-iota 5337 df-fun 5379 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-pnf 8363 df-mnf 8364 df-xr 8365 df-ltxr 8366 df-le 8367 df-sub 8501 df-neg 8502 df-inn 9308 df-n0 9569 df-z 9650 |
| This theorem is used by: nn0zrab 9674 znn0sub 9715 nn0ind 9765 fnn0ind 9767 fznn0 10531 elfz0ubfz0 10543 elfz0fzfz0 10544 fz0fzelfz0 10545 elfzmlbp 10550 difelfzle 10552 difelfznle 10553 elfzo0z 10607 fzofzim 10611 ubmelm1fzo 10655 flqge0nn0 10743 zmodcl 10796 modqmuladdnn0 10820 modsumfzodifsn 10848 uzennn 10888 zsqcl2 11069 iswrdiz 11327 swrdswrdlem 11492 swrdswrd 11493 swrdccatin2 11517 pfxccatin12lem2 11519 pfxccatin12lem3 11520 nn0abscl 11868 nn0maxcl 12008 geolim2 12298 cvgratnnlemabsle 12313 oexpneg 12663 oddnn02np1 12666 evennn02n 12668 nn0ehalf 12689 nn0oddm1d2 12695 divalgb 12711 bitsinv1lem 12747 dfgcd2 12810 uzwodc 12833 algcvga 12848 nn0sqdcq 13007 hashgcdlem 13039 pockthlem 13158 4sqlem14 13206 ennnfoneleminc 13354 bcmono 16265 bposlem1 16272 gausslemma2dlem0h 16341 |
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