coprmdvds - Intuitionistic Logic Explorer

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Theorem coprmdvds 12285

Description: Euclid's Lemma (see ProofWiki "Euclid's Lemma", 10-Jul-2021, https://proofwiki.org/wiki/Euclid's_Lemma): If an integer divides the product of two integers and is coprime to one of them, then it divides the other. See also theorem 1.5 in [ApostolNT] p. 16. (Contributed by Paul Chapman, 22-Jun-2011.) (Proof shortened by AV, 10-Jul-2021.)

**Assertion**
Ref	Expression
coprmdvds	⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ (𝑀 · 𝑁) ∧ (𝐾 gcd 𝑀) = 1) → 𝐾 ∥ 𝑁))

**Proof of Theorem coprmdvds**
Step	Hyp	Ref	Expression
1		zcn 9348	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
2		zcn 9348	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
3		mulcom 8025	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℂ ∧ 𝑁 ∈ ℂ) → (𝑀 · 𝑁) = (𝑁 · 𝑀))
4	1, 2, 3	syl2an 289	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 · 𝑁) = (𝑁 · 𝑀))
5	4	breq2d 4046	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ (𝑁 · 𝑀)))
6		dvdsmulgcd 12217	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾 ∥ (𝑁 · 𝑀) ↔ 𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾))))
7	6	ancoms 268	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑁 · 𝑀) ↔ 𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾))))
8	5, 7	bitrd 188	. . . . . . . 8 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾))))
9	8	3adant1 1017	. . . . . . 7 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾))))
10	9	adantr 276	. . . . . 6 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾))))
11		gcdcom 12165	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾 gcd 𝑀) = (𝑀 gcd 𝐾))
12	11	3adant3 1019	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 gcd 𝑀) = (𝑀 gcd 𝐾))
13	12	eqeq1d 2205	. . . . . . . . . 10 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 gcd 𝑀) = 1 ↔ (𝑀 gcd 𝐾) = 1))
14		oveq2 5933	. . . . . . . . . 10 ⊢ ((𝑀 gcd 𝐾) = 1 → (𝑁 · (𝑀 gcd 𝐾)) = (𝑁 · 1))
15	13, 14	biimtrdi 163	. . . . . . . . 9 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 gcd 𝑀) = 1 → (𝑁 · (𝑀 gcd 𝐾)) = (𝑁 · 1)))
16	15	imp 124	. . . . . . . 8 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝑁 · (𝑀 gcd 𝐾)) = (𝑁 · 1))
17	2	mulridd 8060	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℤ → (𝑁 · 1) = 𝑁)
18	17	3ad2ant3 1022	. . . . . . . . 9 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑁 · 1) = 𝑁)
19	18	adantr 276	. . . . . . . 8 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝑁 · 1) = 𝑁)
20	16, 19	eqtrd 2229	. . . . . . 7 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝑁 · (𝑀 gcd 𝐾)) = 𝑁)
21	20	breq2d 4046	. . . . . 6 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝐾 ∥ (𝑁 · (𝑀 gcd 𝐾)) ↔ 𝐾 ∥ 𝑁))
22	10, 21	bitrd 188	. . . . 5 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ 𝑁))
23	22	biimpd 144	. . . 4 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝐾 ∥ (𝑀 · 𝑁) → 𝐾 ∥ 𝑁))
24	23	ex 115	. . 3 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 gcd 𝑀) = 1 → (𝐾 ∥ (𝑀 · 𝑁) → 𝐾 ∥ 𝑁)))
25	24	com23 78	. 2 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑀 · 𝑁) → ((𝐾 gcd 𝑀) = 1 → 𝐾 ∥ 𝑁)))
26	25	impd 254	1 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 ∥ (𝑀 · 𝑁) ∧ (𝐾 gcd 𝑀) = 1) → 𝐾 ∥ 𝑁))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 980 = wceq 1364 ∈ wcel 2167 class class class wbr 4034 (class class class)co 5925 ℂcc 7894 1c1 7897 · cmul 7901 ℤcz 9343 ∥ cdvds 11969 gcd cgcd 12145

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4149 ax-sep 4152 ax-nul 4160 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-iinf 4625 ax-cnex 7987 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-mulrcl 7995 ax-addcom 7996 ax-mulcom 7997 ax-addass 7998 ax-mulass 7999 ax-distr 8000 ax-i2m1 8001 ax-0lt1 8002 ax-1rid 8003 ax-0id 8004 ax-rnegex 8005 ax-precex 8006 ax-cnre 8007 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 ax-pre-apti 8011 ax-pre-ltadd 8012 ax-pre-mulgt0 8013 ax-pre-mulext 8014 ax-arch 8015 ax-caucvg 8016

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3452 df-if 3563 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-iun 3919 df-br 4035 df-opab 4096 df-mpt 4097 df-tr 4133 df-id 4329 df-po 4332 df-iso 4333 df-iord 4402 df-on 4404 df-ilim 4405 df-suc 4407 df-iom 4628 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-f1 5264 df-fo 5265 df-f1o 5266 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-1st 6207 df-2nd 6208 df-recs 6372 df-frec 6458 df-sup 7059 df-pnf 8080 df-mnf 8081 df-xr 8082 df-ltxr 8083 df-le 8084 df-sub 8216 df-neg 8217 df-reap 8619 df-ap 8626 df-div 8717 df-inn 9008 df-2 9066 df-3 9067 df-4 9068 df-n0 9267 df-z 9344 df-uz 9619 df-q 9711 df-rp 9746 df-fz 10101 df-fzo 10235 df-fl 10377 df-mod 10432 df-seqfrec 10557 df-exp 10648 df-cj 11024 df-re 11025 df-im 11026 df-rsqrt 11180 df-abs 11181 df-dvds 11970 df-gcd 12146

This theorem is referenced by: coprmdvds2 12286 qredeq 12289 cncongr1 12296 euclemma 12339 eulerthlemh 12424 eulerthlemth 12425 prmdiveq 12429 prmpwdvds 12549 mpodvdsmulf1o 15310 perfectlem1 15319 lgseisenlem1 15395 lgseisenlem2 15396 lgsquadlem2 15403 lgsquadlem3 15404 2sqlem8 15448

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