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Mirrors > Home > MPE Home > Th. List > elnnnn0 | Structured version Visualization version GIF version |
Description: The positive integer property expressed in terms of nonnegative integers. (Contributed by NM, 10-May-2004.) |
Ref | Expression |
---|---|
elnnnn0 | ⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℂ ∧ (𝑁 − 1) ∈ ℕ0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nncn 11911 | . 2 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ) | |
2 | npcan1 11330 | . . . . 5 ⊢ (𝑁 ∈ ℂ → ((𝑁 − 1) + 1) = 𝑁) | |
3 | 2 | eleq1d 2823 | . . . 4 ⊢ (𝑁 ∈ ℂ → (((𝑁 − 1) + 1) ∈ ℕ ↔ 𝑁 ∈ ℕ)) |
4 | peano2cnm 11217 | . . . . 5 ⊢ (𝑁 ∈ ℂ → (𝑁 − 1) ∈ ℂ) | |
5 | 4 | biantrurd 532 | . . . 4 ⊢ (𝑁 ∈ ℂ → (((𝑁 − 1) + 1) ∈ ℕ ↔ ((𝑁 − 1) ∈ ℂ ∧ ((𝑁 − 1) + 1) ∈ ℕ))) |
6 | 3, 5 | bitr3d 280 | . . 3 ⊢ (𝑁 ∈ ℂ → (𝑁 ∈ ℕ ↔ ((𝑁 − 1) ∈ ℂ ∧ ((𝑁 − 1) + 1) ∈ ℕ))) |
7 | elnn0nn 12205 | . . 3 ⊢ ((𝑁 − 1) ∈ ℕ0 ↔ ((𝑁 − 1) ∈ ℂ ∧ ((𝑁 − 1) + 1) ∈ ℕ)) | |
8 | 6, 7 | bitr4di 288 | . 2 ⊢ (𝑁 ∈ ℂ → (𝑁 ∈ ℕ ↔ (𝑁 − 1) ∈ ℕ0)) |
9 | 1, 8 | biadanii 818 | 1 ⊢ (𝑁 ∈ ℕ ↔ (𝑁 ∈ ℂ ∧ (𝑁 − 1) ∈ ℕ0)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 ∧ wa 395 ∈ wcel 2108 (class class class)co 7255 ℂcc 10800 1c1 10803 + caddc 10805 − cmin 11135 ℕcn 11903 ℕ0cn0 12163 |
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-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 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-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 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-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 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-nn 11904 df-n0 12164 |
This theorem is referenced by: elfzom1elp1fzo 13382 facnn2 13924 faclbnd4lem1 13935 |
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