dvdsval2 - Metamath Proof Explorer

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Theorem dvdsval2 16225

Description: One nonzero integer divides another integer if and only if their quotient is an integer. (Contributed by Jeff Hankins, 29-Sep-2013.)

**Assertion**
Ref	Expression
dvdsval2	⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))

Proof of Theorem dvdsval2 Dummy variable 𝑘 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		divides 16224	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
2	1	3adant2 1131	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
3		zcn 12534	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
4	3	3ad2ant3 1135	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℂ)
5	4	adantr 480	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑁 ∈ ℂ)
6		zcn 12534	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ)
7	6	adantl 481	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ)
8		zcn 12534	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
9	8	3ad2ant1 1133	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ∈ ℂ)
10	9	adantr 480	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ)
11		simpl2 1193	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0)
12	5, 7, 10, 11	divmul3d 11992	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ 𝑁 = (𝑘 · 𝑀)))
13		eqcom 2736	. . . . . . . 8 ⊢ (𝑁 = (𝑘 · 𝑀) ↔ (𝑘 · 𝑀) = 𝑁)
14	12, 13	bitrdi 287	. . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ (𝑘 · 𝑀) = 𝑁))
15	14	biimprd 248	. . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) = 𝑘))
16	15	impr 454	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) = 𝑘)
17		simprl 770	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → 𝑘 ∈ ℤ)
18	16, 17	eqeltrd 2828	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) ∈ ℤ)
19	18	rexlimdvaa 3135	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ))
20		simpr 484	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → (𝑁 / 𝑀) ∈ ℤ)
21		simp2 1137	. . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0)
22	4, 9, 21	divcan1d 11959	. . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
23	22	adantr 480	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
24		oveq1 7394	. . . . . . 7 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑘 · 𝑀) = ((𝑁 / 𝑀) · 𝑀))
25	24	eqeq1d 2731	. . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑘 · 𝑀) = 𝑁 ↔ ((𝑁 / 𝑀) · 𝑀) = 𝑁))
26	25	rspcev 3588	. . . . 5 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ ((𝑁 / 𝑀) · 𝑀) = 𝑁) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
27	20, 23, 26	syl2anc 584	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
28	27	ex 412	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
29	19, 28	impbid 212	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))
30	2, 29	bitrd 279	1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∃wrex 3053 class class class wbr 5107 (class class class)co 7387 ℂcc 11066 0cc0 11068 · cmul 11073 / cdiv 11835 ℤcz 12529 ∥ cdvds 16222

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-po 5546 df-so 5547 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-div 11836 df-z 12530 df-dvds 16223

This theorem is referenced by: dvdsval3 16226 nndivdvds 16231 fsumdvds 16278 divconjdvds 16285 3dvds 16301 evend2 16327 oddp1d2 16328 fldivndvdslt 16386 bitsmod 16406 sadaddlem 16436 bitsuz 16444 divgcdz 16481 dvdsgcdidd 16507 mulgcd 16518 sqgcd 16532 lcmgcdlem 16576 mulgcddvds 16625 qredeu 16628 prmind2 16655 isprm5 16677 divgcdodd 16680 divnumden 16718 hashdvds 16745 hashgcdlem 16758 pythagtriplem19 16804 pcprendvds2 16812 pcpremul 16814 pc2dvds 16850 pcz 16852 dvdsprmpweqle 16857 pcadd 16860 pcmptdvds 16865 fldivp1 16868 pockthlem 16876 prmreclem1 16887 prmreclem3 16889 4sqlem8 16916 4sqlem9 16917 4sqlem12 16927 4sqlem14 16929 sylow1lem1 19528 sylow3lem4 19560 odadd1 19778 odadd2 19779 pgpfac1lem3 20009 prmirredlem 21382 znidomb 21471 root1eq1 26665 atantayl2 26848 efchtdvds 27069 muinv 27103 bposlem6 27200 lgseisenlem1 27286 lgsquad2lem1 27295 lgsquad3 27298 m1lgs 27299 2sqlem3 27331 2sqlem8 27337 qqhval2lem 33971 nn0prpwlem 36310 knoppndvlem8 36507 aks4d1p8d3 42074 aks4d1p8 42075 aks6d1c1 42104 aks6d1c3 42111 aks6d1c4 42112 aks6d1c2lem4 42115 aks6d1c6lem3 42160 aks6d1c6lem4 42161 unitscyglem4 42186 congrep 42962 jm2.22 42984 jm2.23 42985 proot1ex 43185 nzss 44306 etransclem9 46241 etransclem38 46270 etransclem44 46276 etransclem45 46277 divgcdoddALTV 47683 0dig2nn0o 48602

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