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Mirrors > Home > ILE Home > Th. List > zdiv | GIF version |
Description: Two ways to express "𝑀 divides 𝑁. (Contributed by NM, 3-Oct-2008.) |
Ref | Expression |
---|---|
zdiv | ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnap0 8886 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 # 0) | |
2 | 1 | adantr 274 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → 𝑀 # 0) |
3 | nncn 8865 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℂ) | |
4 | zcn 9196 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
5 | zcn 9196 | . . . . . . . . . . 11 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ) | |
6 | divcanap3 8594 | . . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 # 0) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) | |
7 | 6 | 3coml 1200 | . . . . . . . . . . . 12 ⊢ ((𝑀 ∈ ℂ ∧ 𝑀 # 0 ∧ 𝑘 ∈ ℂ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
8 | 7 | 3expa 1193 | . . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℂ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
9 | 5, 8 | sylan2 284 | . . . . . . . . . 10 ⊢ (((𝑀 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
10 | 9 | 3adantl2 1144 | . . . . . . . . 9 ⊢ (((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
11 | oveq1 5849 | . . . . . . . . 9 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
12 | 10, 11 | sylan9req 2220 | . . . . . . . 8 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
13 | simplr 520 | . . . . . . . 8 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
14 | 12, 13 | eqeltrrd 2244 | . . . . . . 7 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → (𝑁 / 𝑀) ∈ ℤ) |
15 | 14 | exp31 362 | . . . . . 6 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (𝑘 ∈ ℤ → ((𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ))) |
16 | 15 | rexlimdv 2582 | . . . . 5 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
17 | divcanap2 8576 | . . . . . . 7 ⊢ ((𝑁 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 # 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) | |
18 | 17 | 3com12 1197 | . . . . . 6 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
19 | oveq2 5850 | . . . . . . . . 9 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
20 | 19 | eqeq1d 2174 | . . . . . . . 8 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
21 | 20 | rspcev 2830 | . . . . . . 7 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ (𝑀 · (𝑁 / 𝑀)) = 𝑁) → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁) |
22 | 21 | expcom 115 | . . . . . 6 ⊢ ((𝑀 · (𝑁 / 𝑀)) = 𝑁 → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
23 | 18, 22 | syl 14 | . . . . 5 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
24 | 16, 23 | impbid 128 | . . . 4 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
25 | 24 | 3expia 1195 | . . 3 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 # 0 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))) |
26 | 3, 4, 25 | syl2an 287 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → (𝑀 # 0 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))) |
27 | 2, 26 | mpd 13 | 1 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 ∃wrex 2445 class class class wbr 3982 (class class class)co 5842 ℂcc 7751 0cc0 7753 · cmul 7758 # cap 8479 / cdiv 8568 ℕcn 8857 ℤcz 9191 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 |
This theorem depends on definitions: df-bi 116 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-br 3983 df-opab 4044 df-id 4271 df-po 4274 df-iso 4275 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-iota 5153 df-fun 5190 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-z 9192 |
This theorem is referenced by: addmodlteq 10333 |
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