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| Mirrors > Home > MPE Home > Th. List > dvdsmulc | Structured version Visualization version GIF version | ||
| Description: Multiplication by a constant maintains the divides relation. (Contributed by Paul Chapman, 21-Mar-2011.) |
| Ref | Expression |
|---|---|
| dvdsmulc | ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∥ 𝑁 → (𝑀 · 𝐾) ∥ (𝑁 · 𝐾))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3simpc 1168 | . . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ)) | |
| 2 | zmulcl 12670 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 · 𝐾) ∈ ℤ) | |
| 3 | 2 | 3adant2 1149 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 · 𝐾) ∈ ℤ) |
| 4 | zmulcl 12670 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑁 · 𝐾) ∈ ℤ) | |
| 5 | 4 | 3adant1 1148 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑁 · 𝐾) ∈ ℤ) |
| 6 | 3, 5 | jca 521 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝑀 · 𝐾) ∈ ℤ ∧ (𝑁 · 𝐾) ∈ ℤ)) |
| 7 | 6 | 3comr 1143 | . . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑀 · 𝐾) ∈ ℤ ∧ (𝑁 · 𝐾) ∈ ℤ)) |
| 8 | simpr 490 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → 𝑥 ∈ ℤ) | |
| 9 | zcn 12623 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
| 10 | zcn 12623 | . . . . . . . . 9 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 11 | zcn 12623 | . . . . . . . . 9 ⊢ (𝐾 ∈ ℤ → 𝐾 ∈ ℂ) | |
| 12 | mulass 11215 | . . . . . . . . 9 ⊢ ((𝑥 ∈ ℂ ∧ 𝑀 ∈ ℂ ∧ 𝐾 ∈ ℂ) → ((𝑥 · 𝑀) · 𝐾) = (𝑥 · (𝑀 · 𝐾))) | |
| 13 | 9, 10, 11, 12 | syl3an 1178 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ) → ((𝑥 · 𝑀) · 𝐾) = (𝑥 · (𝑀 · 𝐾))) |
| 14 | 13 | 3com13 1142 | . . . . . . 7 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) · 𝐾) = (𝑥 · (𝑀 · 𝐾))) |
| 15 | 14 | 3expa 1136 | . . . . . 6 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) · 𝐾) = (𝑥 · (𝑀 · 𝐾))) |
| 16 | 15 | 3adantl3 1187 | . . . . 5 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) · 𝐾) = (𝑥 · (𝑀 · 𝐾))) |
| 17 | oveq1 7423 | . . . . 5 ⊢ ((𝑥 · 𝑀) = 𝑁 → ((𝑥 · 𝑀) · 𝐾) = (𝑁 · 𝐾)) | |
| 18 | 16, 17 | sylan9req 2818 | . . . 4 ⊢ ((((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) ∧ (𝑥 · 𝑀) = 𝑁) → (𝑥 · (𝑀 · 𝐾)) = (𝑁 · 𝐾)) |
| 19 | 18 | ex 418 | . . 3 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑀) = 𝑁 → (𝑥 · (𝑀 · 𝐾)) = (𝑁 · 𝐾))) |
| 20 | 1, 7, 8, 19 | dvds1lem 16361 | . 2 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 → (𝑀 · 𝐾) ∥ (𝑁 · 𝐾))) |
| 21 | 20 | 3coml 1145 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑀 ∥ 𝑁 → (𝑀 · 𝐾) ∥ (𝑁 · 𝐾))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 class class class wbr 5107 (class class class)co 7416 ℂcc 11125 · cmul 11132 ℤcz 12618 ∥ cdvds 16346 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-pnf 11272 df-mnf 11273 df-ltxr 11275 df-sub 11470 df-neg 11471 df-nn 12261 df-n0 12532 df-z 12619 df-dvds 16347 |
| This theorem is used by: dvdsmulcr 16379 coprmdvds2 16748 mulgcddvds 16749 rpmulgcd2 16750 pcpremul 16939 odadd2 19977 ablfacrp2 20197 znrrg 21779 mpodvdsmulf1o 27428 dvdsmulf1o 27430 nnproddivdvdsd 42853 muldvdsfacgt 48261 |
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