dvdsval2 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > dvdsval2		Structured version Visualization version GIF version

Theorem dvdsval2 16194

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 16193	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
2	1	3adant2 1132	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
3		zcn 12505	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
4	3	3ad2ant3 1136	. . . . . . . . . 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 12505	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ)
7	6	adantl 481	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ)
8		zcn 12505	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
9	8	3ad2ant1 1134	. . . . . . . . . 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 1194	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0)
12	5, 7, 10, 11	divmul3d 11963	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ 𝑁 = (𝑘 · 𝑀)))
13		eqcom 2744	. . . . . . . 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 771	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → 𝑘 ∈ ℤ)
18	16, 17	eqeltrd 2837	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) ∈ ℤ)
19	18	rexlimdvaa 3140	. . 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 1138	. . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0)
22	4, 9, 21	divcan1d 11930	. . . . . 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 7375	. . . . . . 7 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑘 · 𝑀) = ((𝑁 / 𝑀) · 𝑀))
25	24	eqeq1d 2739	. . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑘 · 𝑀) = 𝑁 ↔ ((𝑁 / 𝑀) · 𝑀) = 𝑁))
26	25	rspcev 3578	. . . . 5 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ ((𝑁 / 𝑀) · 𝑀) = 𝑁) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
27	20, 23, 26	syl2anc 585	. . . 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 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∃wrex 3062 class class class wbr 5100 (class class class)co 7368 ℂcc 11036 0cc0 11038 · cmul 11043 / cdiv 11806 ℤcz 12500 ∥ cdvds 16191

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-z 12501 df-dvds 16192

This theorem is referenced by: dvdsval3 16195 nndivdvds 16200 fsumdvds 16247 divconjdvds 16254 3dvds 16270 evend2 16296 oddp1d2 16297 fldivndvdslt 16355 bitsmod 16375 sadaddlem 16405 bitsuz 16413 divgcdz 16450 dvdsgcdidd 16476 mulgcd 16487 sqgcd 16501 lcmgcdlem 16545 mulgcddvds 16594 qredeu 16597 prmind2 16624 isprm5 16646 divgcdodd 16649 divnumden 16687 hashdvds 16714 hashgcdlem 16727 pythagtriplem19 16773 pcprendvds2 16781 pcpremul 16783 pc2dvds 16819 pcz 16821 dvdsprmpweqle 16826 pcadd 16829 pcmptdvds 16834 fldivp1 16837 pockthlem 16845 prmreclem1 16856 prmreclem3 16858 4sqlem8 16885 4sqlem9 16886 4sqlem12 16896 4sqlem14 16898 sylow1lem1 19539 sylow3lem4 19571 odadd1 19789 odadd2 19790 pgpfac1lem3 20020 prmirredlem 21439 znidomb 21528 root1eq1 26733 atantayl2 26916 efchtdvds 27137 muinv 27171 bposlem6 27268 lgseisenlem1 27354 lgsquad2lem1 27363 lgsquad3 27366 m1lgs 27367 2sqlem3 27399 2sqlem8 27405 qqhval2lem 34158 nn0prpwlem 36535 knoppndvlem8 36738 aks4d1p8d3 42445 aks4d1p8 42446 aks6d1c1 42475 aks6d1c3 42482 aks6d1c4 42483 aks6d1c2lem4 42486 aks6d1c6lem3 42531 aks6d1c6lem4 42532 unitscyglem4 42557 congrep 43319 jm2.22 43341 jm2.23 43342 proot1ex 43542 nzss 44662 etransclem9 46590 etransclem38 46619 etransclem44 46625 etransclem45 46626 divgcdoddALTV 48031 0dig2nn0o 48962

W3C validator