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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 8907 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 # 0) | |
2 | 1 | adantr 274 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → 𝑀 # 0) |
3 | nncn 8886 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℂ) | |
4 | zcn 9217 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
5 | zcn 9217 | . . . . . . . . . . 11 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ) | |
6 | divcanap3 8615 | . . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 # 0) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) | |
7 | 6 | 3coml 1205 | . . . . . . . . . . . 12 ⊢ ((𝑀 ∈ ℂ ∧ 𝑀 # 0 ∧ 𝑘 ∈ ℂ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
8 | 7 | 3expa 1198 | . . . . . . . . . . 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 1149 | . . . . . . . . 9 ⊢ (((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
11 | oveq1 5860 | . . . . . . . . 9 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
12 | 10, 11 | sylan9req 2224 | . . . . . . . 8 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
13 | simplr 525 | . . . . . . . 8 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
14 | 12, 13 | eqeltrrd 2248 | . . . . . . 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 2586 | . . . . 5 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
17 | divcanap2 8597 | . . . . . . 7 ⊢ ((𝑁 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 # 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) | |
18 | 17 | 3com12 1202 | . . . . . 6 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 # 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
19 | oveq2 5861 | . . . . . . . . 9 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
20 | 19 | eqeq1d 2179 | . . . . . . . 8 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
21 | 20 | rspcev 2834 | . . . . . . 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 1200 | . . 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 973 = wceq 1348 ∈ wcel 2141 ∃wrex 2449 class class class wbr 3989 (class class class)co 5853 ℂcc 7772 0cc0 7774 · cmul 7779 # cap 8500 / cdiv 8589 ℕcn 8878 ℤcz 9212 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-ltirr 7886 ax-pre-ltwlin 7887 ax-pre-lttrn 7888 ax-pre-apti 7889 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 ax-pre-mulext 7892 |
This theorem depends on definitions: df-bi 116 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-int 3832 df-br 3990 df-opab 4051 df-id 4278 df-po 4281 df-iso 4282 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-iota 5160 df-fun 5200 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-pnf 7956 df-mnf 7957 df-xr 7958 df-ltxr 7959 df-le 7960 df-sub 8092 df-neg 8093 df-reap 8494 df-ap 8501 df-div 8590 df-inn 8879 df-z 9213 |
This theorem is referenced by: addmodlteq 10354 |
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