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Mirrors > Home > MPE Home > Th. List > elnn0nn | Structured version Visualization version GIF version |
Description: The nonnegative integer property expressed in terms of positive integers. (Contributed by NM, 10-May-2004.) (Proof shortened by Mario Carneiro, 16-May-2014.) |
Ref | Expression |
---|---|
elnn0nn | ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn0cn 11514 | . . 3 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ) | |
2 | nn0p1nn 11544 | . . 3 ⊢ (𝑁 ∈ ℕ0 → (𝑁 + 1) ∈ ℕ) | |
3 | 1, 2 | jca 555 | . 2 ⊢ (𝑁 ∈ ℕ0 → (𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ)) |
4 | simpl 474 | . . . 4 ⊢ ((𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → 𝑁 ∈ ℂ) | |
5 | ax-1cn 10206 | . . . 4 ⊢ 1 ∈ ℂ | |
6 | pncan 10499 | . . . 4 ⊢ ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 + 1) − 1) = 𝑁) | |
7 | 4, 5, 6 | sylancl 697 | . . 3 ⊢ ((𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → ((𝑁 + 1) − 1) = 𝑁) |
8 | nnm1nn0 11546 | . . . 4 ⊢ ((𝑁 + 1) ∈ ℕ → ((𝑁 + 1) − 1) ∈ ℕ0) | |
9 | 8 | adantl 473 | . . 3 ⊢ ((𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → ((𝑁 + 1) − 1) ∈ ℕ0) |
10 | 7, 9 | eqeltrrd 2840 | . 2 ⊢ ((𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → 𝑁 ∈ ℕ0) |
11 | 3, 10 | impbii 199 | 1 ⊢ (𝑁 ∈ ℕ0 ↔ (𝑁 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 196 ∧ wa 383 = wceq 1632 ∈ wcel 2139 (class class class)co 6814 ℂcc 10146 1c1 10149 + caddc 10151 − cmin 10478 ℕcn 11232 ℕ0cn0 11504 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1871 ax-4 1886 ax-5 1988 ax-6 2054 ax-7 2090 ax-8 2141 ax-9 2148 ax-10 2168 ax-11 2183 ax-12 2196 ax-13 2391 ax-ext 2740 ax-sep 4933 ax-nul 4941 ax-pow 4992 ax-pr 5055 ax-un 7115 ax-resscn 10205 ax-1cn 10206 ax-icn 10207 ax-addcl 10208 ax-addrcl 10209 ax-mulcl 10210 ax-mulrcl 10211 ax-mulcom 10212 ax-addass 10213 ax-mulass 10214 ax-distr 10215 ax-i2m1 10216 ax-1ne0 10217 ax-1rid 10218 ax-rnegex 10219 ax-rrecex 10220 ax-cnre 10221 ax-pre-lttri 10222 ax-pre-lttrn 10223 ax-pre-ltadd 10224 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1635 df-ex 1854 df-nf 1859 df-sb 2047 df-eu 2611 df-mo 2612 df-clab 2747 df-cleq 2753 df-clel 2756 df-nfc 2891 df-ne 2933 df-nel 3036 df-ral 3055 df-rex 3056 df-reu 3057 df-rab 3059 df-v 3342 df-sbc 3577 df-csb 3675 df-dif 3718 df-un 3720 df-in 3722 df-ss 3729 df-pss 3731 df-nul 4059 df-if 4231 df-pw 4304 df-sn 4322 df-pr 4324 df-tp 4326 df-op 4328 df-uni 4589 df-iun 4674 df-br 4805 df-opab 4865 df-mpt 4882 df-tr 4905 df-id 5174 df-eprel 5179 df-po 5187 df-so 5188 df-fr 5225 df-we 5227 df-xp 5272 df-rel 5273 df-cnv 5274 df-co 5275 df-dm 5276 df-rn 5277 df-res 5278 df-ima 5279 df-pred 5841 df-ord 5887 df-on 5888 df-lim 5889 df-suc 5890 df-iota 6012 df-fun 6051 df-fn 6052 df-f 6053 df-f1 6054 df-fo 6055 df-f1o 6056 df-fv 6057 df-riota 6775 df-ov 6817 df-oprab 6818 df-mpt2 6819 df-om 7232 df-wrecs 7577 df-recs 7638 df-rdg 7676 df-er 7913 df-en 8124 df-dom 8125 df-sdom 8126 df-pnf 10288 df-mnf 10289 df-ltxr 10291 df-sub 10480 df-nn 11233 df-n0 11505 |
This theorem is referenced by: elnnnn0 11548 |
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