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Mirrors > Home > MPE Home > Th. List > zdiv | Structured version Visualization version 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 | nnne0 12017 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 ≠ 0) | |
2 | 1 | adantr 481 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0) |
3 | nncn 11991 | . . 3 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℂ) | |
4 | zcn 12334 | . . 3 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
5 | zcn 12334 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ) | |
6 | divcan3 11669 | . . . . . . . . . . . 12 ⊢ ((𝑘 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 ≠ 0) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) | |
7 | 6 | 3coml 1126 | . . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℂ ∧ 𝑀 ≠ 0 ∧ 𝑘 ∈ ℂ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
8 | 7 | 3expa 1117 | . . . . . . . . . 10 ⊢ (((𝑀 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℂ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
9 | 5, 8 | sylan2 593 | . . . . . . . . 9 ⊢ (((𝑀 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
10 | 9 | 3adantl2 1166 | . . . . . . . 8 ⊢ (((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℤ) → ((𝑀 · 𝑘) / 𝑀) = 𝑘) |
11 | oveq1 7274 | . . . . . . . 8 ⊢ ((𝑀 · 𝑘) = 𝑁 → ((𝑀 · 𝑘) / 𝑀) = (𝑁 / 𝑀)) | |
12 | 10, 11 | sylan9req 2799 | . . . . . . 7 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 = (𝑁 / 𝑀)) |
13 | simplr 766 | . . . . . . 7 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → 𝑘 ∈ ℤ) | |
14 | 12, 13 | eqeltrrd 2840 | . . . . . 6 ⊢ ((((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) ∧ 𝑘 ∈ ℤ) ∧ (𝑀 · 𝑘) = 𝑁) → (𝑁 / 𝑀) ∈ ℤ) |
15 | 14 | rexlimdva2 3214 | . . . . 5 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ)) |
16 | divcan2 11651 | . . . . . . 7 ⊢ ((𝑁 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝑀 ≠ 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) | |
17 | 16 | 3com12 1122 | . . . . . 6 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) → (𝑀 · (𝑁 / 𝑀)) = 𝑁) |
18 | oveq2 7275 | . . . . . . . . 9 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑀 · 𝑘) = (𝑀 · (𝑁 / 𝑀))) | |
19 | 18 | eqeq1d 2740 | . . . . . . . 8 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑀 · 𝑘) = 𝑁 ↔ (𝑀 · (𝑁 / 𝑀)) = 𝑁)) |
20 | 19 | rspcev 3559 | . . . . . . 7 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ (𝑀 · (𝑁 / 𝑀)) = 𝑁) → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁) |
21 | 20 | expcom 414 | . . . . . 6 ⊢ ((𝑀 · (𝑁 / 𝑀)) = 𝑁 → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
22 | 17, 21 | syl 17 | . . . . 5 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁)) |
23 | 15, 22 | impbid 211 | . . . 4 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ 𝑀 ≠ 0) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
24 | 23 | 3expia 1120 | . . 3 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 ≠ 0 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))) |
25 | 3, 4, 24 | syl2an 596 | . 2 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → (𝑀 ≠ 0 → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))) |
26 | 2, 25 | mpd 15 | 1 ⊢ ((𝑀 ∈ ℕ ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑀 · 𝑘) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∃wrex 3065 (class class class)co 7267 ℂcc 10879 0cc0 10881 · cmul 10886 / cdiv 11642 ℕcn 11983 ℤcz 12329 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rmo 3072 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-om 7703 df-2nd 7821 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-er 8485 df-en 8721 df-dom 8722 df-sdom 8723 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-div 11643 df-nn 11984 df-z 12330 |
This theorem is referenced by: addmodlteq 13676 fmtnoprmfac2lem1 44996 |
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