coprmdvds - Intuitionistic Logic Explorer

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Theorem coprmdvds 12870

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 9649	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
2		zcn 9649	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
3		mulcom 8308	. . . . . . . . . . 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 4142	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 ∥ (𝑀 · 𝑁) ↔ 𝐾 ∥ (𝑁 · 𝑀)))
6		dvdsmulgcd 12802	. . . . . . . . . 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 1046	. . . . . . 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 12750	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ) → (𝐾 gcd 𝑀) = (𝑀 gcd 𝐾))
12	11	3adant3 1048	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝐾 gcd 𝑀) = (𝑀 gcd 𝐾))
13	12	eqeq1d 2247	. . . . . . . . . 10 ⊢ ((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝐾 gcd 𝑀) = 1 ↔ (𝑀 gcd 𝐾) = 1))
14		oveq2 6093	. . . . . . . . . 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 8343	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℤ → (𝑁 · 1) = 𝑁)
18	17	3ad2ant3 1051	. . . . . . . . 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 2271	. . . . . . 7 ⊢ (((𝐾 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝐾 gcd 𝑀) = 1) → (𝑁 · (𝑀 gcd 𝐾)) = 𝑁)
21	20	breq2d 4142	. . . . . 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

This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 class class class wbr 4130 (class class class)co 6085 ℂcc 8177 1c1 8180 · cmul 8184 ℤcz 9644 ∥ cdvds 12554 gcd cgcd 12730

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4246 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-iinf 4735 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-mulrcl 8278 ax-addcom 8279 ax-mulcom 8280 ax-addass 8281 ax-mulass 8282 ax-distr 8283 ax-i2m1 8284 ax-0lt1 8285 ax-1rid 8286 ax-0id 8287 ax-rnegex 8288 ax-precex 8289 ax-cnre 8290 ax-pre-ltirr 8291 ax-pre-ltwlin 8292 ax-pre-lttrn 8293 ax-pre-apti 8294 ax-pre-ltadd 8295 ax-pre-mulgt0 8296 ax-pre-mulext 8297 ax-arch 8298 ax-caucvg 8299

This proof depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-id 4438 df-po 4441 df-iso 4442 df-iord 4511 df-on 4513 df-ilim 4514 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-recs 6576 df-frec 6662 df-sup 7324 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-sub 8499 df-neg 8500 df-reap 8903 df-ap 8910 df-div 9003 df-inn 9305 df-2 9363 df-3 9364 df-4 9365 df-n0 9564 df-z 9645 df-uz 9922 df-q 10020 df-rp 10055 df-fz 10412 df-fzo 10550 df-fl 10705 df-mod 10760 df-seqfrec 10885 df-exp 10976 df-cj 11607 df-re 11608 df-im 11609 df-rsqrt 11764 df-abs 11765 df-dvds 12555 df-gcd 12731

This theorem is used by: coprmdvds2 12871 qredeq 12874 cncongr1 12881 euclemma 12924 eulerthlemh 13009 eulerthlemth 13010 prmdiveq 13014 prmpwdvds 13134 mpodvdsmulf1o 16104 perfectlem1 16113 lgseisenlem1 16189 lgseisenlem2 16190 lgsquadlem2 16197 lgsquadlem3 16198 2sqlem8 16242

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