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Mirrors > Home > ILE Home > Th. List > coprmdvds2 | GIF version |
Description: If an integer is divisible by two coprime integers, then it is divisible by their product. (Contributed by Mario Carneiro, 24-Feb-2014.) |
Ref | Expression |
---|---|
coprmdvds2 | ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → ((𝑀 ∥ 𝐾 ∧ 𝑁 ∥ 𝐾) → (𝑀 · 𝑁) ∥ 𝐾)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | divides 11689 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑁 ∥ 𝐾 ↔ ∃𝑥 ∈ ℤ (𝑥 · 𝑁) = 𝐾)) | |
2 | 1 | 3adant1 1000 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) → (𝑁 ∥ 𝐾 ↔ ∃𝑥 ∈ ℤ (𝑥 · 𝑁) = 𝐾)) |
3 | 2 | adantr 274 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → (𝑁 ∥ 𝐾 ↔ ∃𝑥 ∈ ℤ (𝑥 · 𝑁) = 𝐾)) |
4 | simprr 522 | . . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → 𝑥 ∈ ℤ) | |
5 | simpl2 986 | . . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → 𝑁 ∈ ℤ) | |
6 | zcn 9173 | . . . . . . . . . . . 12 ⊢ (𝑥 ∈ ℤ → 𝑥 ∈ ℂ) | |
7 | zcn 9173 | . . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ) | |
8 | mulcom 7862 | . . . . . . . . . . . 12 ⊢ ((𝑥 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑥 · 𝑁) = (𝑁 · 𝑥)) | |
9 | 6, 7, 8 | syl2an 287 | . . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑥 · 𝑁) = (𝑁 · 𝑥)) |
10 | 4, 5, 9 | syl2anc 409 | . . . . . . . . . 10 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑥 · 𝑁) = (𝑁 · 𝑥)) |
11 | 10 | breq2d 3978 | . . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 ∥ (𝑥 · 𝑁) ↔ 𝑀 ∥ (𝑁 · 𝑥))) |
12 | simprl 521 | . . . . . . . . . 10 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 gcd 𝑁) = 1) | |
13 | simpl1 985 | . . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → 𝑀 ∈ ℤ) | |
14 | coprmdvds 11973 | . . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑥 ∈ ℤ) → ((𝑀 ∥ (𝑁 · 𝑥) ∧ (𝑀 gcd 𝑁) = 1) → 𝑀 ∥ 𝑥)) | |
15 | 13, 5, 4, 14 | syl3anc 1220 | . . . . . . . . . 10 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → ((𝑀 ∥ (𝑁 · 𝑥) ∧ (𝑀 gcd 𝑁) = 1) → 𝑀 ∥ 𝑥)) |
16 | 12, 15 | mpan2d 425 | . . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 ∥ (𝑁 · 𝑥) → 𝑀 ∥ 𝑥)) |
17 | 11, 16 | sylbid 149 | . . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 ∥ (𝑥 · 𝑁) → 𝑀 ∥ 𝑥)) |
18 | dvdsmulc 11719 | . . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑥 → (𝑀 · 𝑁) ∥ (𝑥 · 𝑁))) | |
19 | 13, 4, 5, 18 | syl3anc 1220 | . . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 ∥ 𝑥 → (𝑀 · 𝑁) ∥ (𝑥 · 𝑁))) |
20 | 17, 19 | syld 45 | . . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → (𝑀 ∥ (𝑥 · 𝑁) → (𝑀 · 𝑁) ∥ (𝑥 · 𝑁))) |
21 | breq2 3970 | . . . . . . . 8 ⊢ ((𝑥 · 𝑁) = 𝐾 → (𝑀 ∥ (𝑥 · 𝑁) ↔ 𝑀 ∥ 𝐾)) | |
22 | breq2 3970 | . . . . . . . 8 ⊢ ((𝑥 · 𝑁) = 𝐾 → ((𝑀 · 𝑁) ∥ (𝑥 · 𝑁) ↔ (𝑀 · 𝑁) ∥ 𝐾)) | |
23 | 21, 22 | imbi12d 233 | . . . . . . 7 ⊢ ((𝑥 · 𝑁) = 𝐾 → ((𝑀 ∥ (𝑥 · 𝑁) → (𝑀 · 𝑁) ∥ (𝑥 · 𝑁)) ↔ (𝑀 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
24 | 20, 23 | syl5ibcom 154 | . . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ ((𝑀 gcd 𝑁) = 1 ∧ 𝑥 ∈ ℤ)) → ((𝑥 · 𝑁) = 𝐾 → (𝑀 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
25 | 24 | anassrs 398 | . . . . 5 ⊢ ((((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) ∧ 𝑥 ∈ ℤ) → ((𝑥 · 𝑁) = 𝐾 → (𝑀 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
26 | 25 | rexlimdva 2574 | . . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → (∃𝑥 ∈ ℤ (𝑥 · 𝑁) = 𝐾 → (𝑀 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
27 | 3, 26 | sylbid 149 | . . 3 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → (𝑁 ∥ 𝐾 → (𝑀 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
28 | 27 | com23 78 | . 2 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → (𝑀 ∥ 𝐾 → (𝑁 ∥ 𝐾 → (𝑀 · 𝑁) ∥ 𝐾))) |
29 | 28 | impd 252 | 1 ⊢ (((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ) ∧ (𝑀 gcd 𝑁) = 1) → ((𝑀 ∥ 𝐾 ∧ 𝑁 ∥ 𝐾) → (𝑀 · 𝑁) ∥ 𝐾)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 963 = wceq 1335 ∈ wcel 2128 ∃wrex 2436 class class class wbr 3966 (class class class)co 5825 ℂcc 7731 1c1 7734 · cmul 7738 ℤcz 9168 ∥ cdvds 11687 gcd cgcd 11833 |
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 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-coll 4080 ax-sep 4083 ax-nul 4091 ax-pow 4136 ax-pr 4170 ax-un 4394 ax-setind 4497 ax-iinf 4548 ax-cnex 7824 ax-resscn 7825 ax-1cn 7826 ax-1re 7827 ax-icn 7828 ax-addcl 7829 ax-addrcl 7830 ax-mulcl 7831 ax-mulrcl 7832 ax-addcom 7833 ax-mulcom 7834 ax-addass 7835 ax-mulass 7836 ax-distr 7837 ax-i2m1 7838 ax-0lt1 7839 ax-1rid 7840 ax-0id 7841 ax-rnegex 7842 ax-precex 7843 ax-cnre 7844 ax-pre-ltirr 7845 ax-pre-ltwlin 7846 ax-pre-lttrn 7847 ax-pre-apti 7848 ax-pre-ltadd 7849 ax-pre-mulgt0 7850 ax-pre-mulext 7851 ax-arch 7852 ax-caucvg 7853 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-nel 2423 df-ral 2440 df-rex 2441 df-reu 2442 df-rmo 2443 df-rab 2444 df-v 2714 df-sbc 2938 df-csb 3032 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-nul 3395 df-if 3506 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3774 df-int 3809 df-iun 3852 df-br 3967 df-opab 4027 df-mpt 4028 df-tr 4064 df-id 4254 df-po 4257 df-iso 4258 df-iord 4327 df-on 4329 df-ilim 4330 df-suc 4332 df-iom 4551 df-xp 4593 df-rel 4594 df-cnv 4595 df-co 4596 df-dm 4597 df-rn 4598 df-res 4599 df-ima 4600 df-iota 5136 df-fun 5173 df-fn 5174 df-f 5175 df-f1 5176 df-fo 5177 df-f1o 5178 df-fv 5179 df-riota 5781 df-ov 5828 df-oprab 5829 df-mpo 5830 df-1st 6089 df-2nd 6090 df-recs 6253 df-frec 6339 df-sup 6929 df-pnf 7915 df-mnf 7916 df-xr 7917 df-ltxr 7918 df-le 7919 df-sub 8049 df-neg 8050 df-reap 8451 df-ap 8458 df-div 8547 df-inn 8835 df-2 8893 df-3 8894 df-4 8895 df-n0 9092 df-z 9169 df-uz 9441 df-q 9530 df-rp 9562 df-fz 9914 df-fzo 10046 df-fl 10173 df-mod 10226 df-seqfrec 10349 df-exp 10423 df-cj 10746 df-re 10747 df-im 10748 df-rsqrt 10902 df-abs 10903 df-dvds 11688 df-gcd 11834 |
This theorem is referenced by: rpmulgcd2 11976 crth 12103 |
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