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Mirrors > Home > MPE Home > Th. List > muldvds1 | Structured version Visualization version GIF version |
Description: If a product divides an integer, so does one of its factors. (Contributed by Paul Chapman, 21-Mar-2011.) |
Ref | Expression |
---|---|
muldvds1 | ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 · 𝑀) ∥ 𝑁 → 𝐾 ∥ 𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zmulcl 11778 | . . . 4 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾 · 𝑀) ∈ ℤ) | |
2 | 1 | anim1i 608 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ 𝑁 ∈ ℤ) → ((𝐾 · 𝑀) ∈ ℤ ∧ 𝑁 ∈ ℤ)) |
3 | 2 | 3impa 1097 | . 2 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 · 𝑀) ∈ ℤ ∧ 𝑁 ∈ ℤ)) |
4 | 3simpb 1141 | . 2 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∈ ℤ ∧ 𝑁 ∈ ℤ)) | |
5 | zmulcl 11778 | . . . 4 ⊢ ((𝑥 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝑥 · 𝑀) ∈ ℤ) | |
6 | 5 | ancoms 452 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → (𝑥 · 𝑀) ∈ ℤ) |
7 | 6 | 3ad2antl2 1194 | . 2 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (𝑥 · 𝑀) ∈ ℤ) |
8 | zcn 11733 | . . . . . . . 8 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
9 | zcn 11733 | . . . . . . . 8 ⊢ (𝐾 ∈ ℤ → 𝐾 ∈ ℂ) | |
10 | zcn 11733 | . . . . . . . 8 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
11 | mulass 10360 | . . . . . . . . 9 ⊢ ((𝑥 ∈ ℂ ∧ 𝐾 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ((𝑥 · 𝐾) · 𝑀) = (𝑥 · (𝐾 · 𝑀))) | |
12 | mul32 10542 | . . . . . . . . 9 ⊢ ((𝑥 ∈ ℂ ∧ 𝐾 ∈ ℂ ∧ 𝑀 ∈ ℂ) → ((𝑥 · 𝐾) · 𝑀) = ((𝑥 · 𝑀) · 𝐾)) | |
13 | 11, 12 | eqtr3d 2815 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝐾 ∈ ℂ ∧ 𝑀 ∈ ℂ) → (𝑥 · (𝐾 · 𝑀)) = ((𝑥 · 𝑀) · 𝐾)) |
14 | 8, 9, 10, 13 | syl3an 1160 | . . . . . . 7 ⊢ ((𝑥 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝑥 · (𝐾 · 𝑀)) = ((𝑥 · 𝑀) · 𝐾)) |
15 | 14 | 3coml 1118 | . . . . . 6 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → (𝑥 · (𝐾 · 𝑀)) = ((𝑥 · 𝑀) · 𝐾)) |
16 | 15 | 3expa 1108 | . . . . 5 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (𝑥 · (𝐾 · 𝑀)) = ((𝑥 · 𝑀) · 𝐾)) |
17 | 16 | 3adantl3 1170 | . . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → (𝑥 · (𝐾 · 𝑀)) = ((𝑥 · 𝑀) · 𝐾)) |
18 | 17 | eqeq1d 2779 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · (𝐾 · 𝑀)) = 𝑁 ↔ ((𝑥 · 𝑀) · 𝐾) = 𝑁)) |
19 | 18 | biimpd 221 | . 2 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · (𝐾 · 𝑀)) = 𝑁 → ((𝑥 · 𝑀) · 𝐾) = 𝑁)) |
20 | 3, 4, 7, 19 | dvds1lem 15400 | 1 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 · 𝑀) ∥ 𝑁 → 𝐾 ∥ 𝑁)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 386 ∧ w3a 1071 = wceq 1601 ∈ wcel 2106 class class class wbr 4886 (class class class)co 6922 ℂcc 10270 · cmul 10277 ℤcz 11728 ∥ cdvds 15387 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1839 ax-4 1853 ax-5 1953 ax-6 2021 ax-7 2054 ax-8 2108 ax-9 2115 ax-10 2134 ax-11 2149 ax-12 2162 ax-13 2333 ax-ext 2753 ax-sep 5017 ax-nul 5025 ax-pow 5077 ax-pr 5138 ax-un 7226 ax-resscn 10329 ax-1cn 10330 ax-icn 10331 ax-addcl 10332 ax-addrcl 10333 ax-mulcl 10334 ax-mulrcl 10335 ax-mulcom 10336 ax-addass 10337 ax-mulass 10338 ax-distr 10339 ax-i2m1 10340 ax-1ne0 10341 ax-1rid 10342 ax-rnegex 10343 ax-rrecex 10344 ax-cnre 10345 ax-pre-lttri 10346 ax-pre-lttrn 10347 ax-pre-ltadd 10348 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 837 df-3or 1072 df-3an 1073 df-tru 1605 df-ex 1824 df-nf 1828 df-sb 2012 df-mo 2550 df-eu 2586 df-clab 2763 df-cleq 2769 df-clel 2773 df-nfc 2920 df-ne 2969 df-nel 3075 df-ral 3094 df-rex 3095 df-reu 3096 df-rab 3098 df-v 3399 df-sbc 3652 df-csb 3751 df-dif 3794 df-un 3796 df-in 3798 df-ss 3805 df-pss 3807 df-nul 4141 df-if 4307 df-pw 4380 df-sn 4398 df-pr 4400 df-tp 4402 df-op 4404 df-uni 4672 df-iun 4755 df-br 4887 df-opab 4949 df-mpt 4966 df-tr 4988 df-id 5261 df-eprel 5266 df-po 5274 df-so 5275 df-fr 5314 df-we 5316 df-xp 5361 df-rel 5362 df-cnv 5363 df-co 5364 df-dm 5365 df-rn 5366 df-res 5367 df-ima 5368 df-pred 5933 df-ord 5979 df-on 5980 df-lim 5981 df-suc 5982 df-iota 6099 df-fun 6137 df-fn 6138 df-f 6139 df-f1 6140 df-fo 6141 df-f1o 6142 df-fv 6143 df-riota 6883 df-ov 6925 df-oprab 6926 df-mpt2 6927 df-om 7344 df-wrecs 7689 df-recs 7751 df-rdg 7789 df-er 8026 df-en 8242 df-dom 8243 df-sdom 8244 df-pnf 10413 df-mnf 10414 df-ltxr 10416 df-sub 10608 df-neg 10609 df-nn 11375 df-n0 11643 df-z 11729 df-dvds 15388 |
This theorem is referenced by: 3dvds 15459 odmulg 18357 jm2.20nn 38505 jm2.27c 38515 nzss 39454 etransclem28 41388 fmtnofac2lem 42483 |
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