dvdsval2 - Metamath Proof Explorer

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Theorem dvdsval2 16454

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 16453	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
2	1	3adant2 1149	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
3		zcn 12725	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
4	3	3ad2ant3 1153	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℂ)
5	4	adantr 486	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑁 ∈ ℂ)
6		zcn 12725	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ)
7	6	adantl 487	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ)
8		zcn 12725	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
9	8	3ad2ant1 1151	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ∈ ℂ)
10	9	adantr 486	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ)
11		simpl2 1211	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0)
12	5, 7, 10, 11	divmul3d 12154	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ 𝑁 = (𝑘 · 𝑀)))
13		eqcom 2770	. . . . . . . 8 ⊢ (𝑁 = (𝑘 · 𝑀) ↔ (𝑘 · 𝑀) = 𝑁)
14	12, 13	bitrdi 290	. . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ (𝑘 · 𝑀) = 𝑁))
15	14	biimprd 251	. . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) = 𝑘))
16	15	impr 460	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) = 𝑘)
17		simprl 783	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → 𝑘 ∈ ℤ)
18	16, 17	eqeltrd 2864	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) ∈ ℤ)
19	18	rexlimdvaa 3168	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ))
20		simpr 490	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → (𝑁 / 𝑀) ∈ ℤ)
21		simp2 1155	. . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0)
22	4, 9, 21	divcan1d 12121	. . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
23	22	adantr 486	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
24		oveq1 7450	. . . . . . 7 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑘 · 𝑀) = ((𝑁 / 𝑀) · 𝑀))
25	24	eqeq1d 2765	. . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑘 · 𝑀) = 𝑁 ↔ ((𝑁 / 𝑀) · 𝑀) = 𝑁))
26	25	rspcev 3580	. . . . 5 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ ((𝑁 / 𝑀) · 𝑀) = 𝑁) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
27	20, 23, 26	syl2anc 596	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
28	27	ex 418	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
29	19, 28	impbid 215	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))
30	2, 29	bitrd 282	1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))

Colors of variables: wff setvar class

This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ∃wrex 3090 class class class wbr 5106 (class class class)co 7443 ℂcc 11225 0cc0 11227 · cmul 11232 / cdiv 12000 ℤcz 12720 ∥ cdvds 16451

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-resscn 11284 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-addrcl 11288 ax-mulcl 11289 ax-mulrcl 11290 ax-mulcom 11291 ax-addass 11292 ax-mulass 11293 ax-distr 11294 ax-i2m1 11295 ax-1ne0 11296 ax-1rid 11297 ax-rnegex 11298 ax-rrecex 11299 ax-cnre 11300 ax-pre-lttri 11301 ax-pre-lttrn 11302 ax-pre-ltadd 11303 ax-pre-mulgt0 11304

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-riota 7400 df-ov 7446 df-oprab 7447 df-mpo 7448 df-er 8745 df-en 9002 df-dom 9003 df-sdom 9004 df-pnf 11372 df-mnf 11373 df-xr 11374 df-ltxr 11375 df-le 11376 df-sub 11570 df-neg 11571 df-div 12001 df-z 12721 df-dvds 16452

This theorem is used by: dvdsval3 16455 nndivdvds 16460 fsumdvds 16507 divconjdvds 16514 3dvds 16530 evend2 16556 oddp1d2 16557 fldivndvdslt 16615 bitsmod 16635 sadaddlem 16665 bitsuz 16673 divgcdz 16712 dvdsgcdidd 16739 mulgcd 16750 sqgcd 16765 lcmgcdlem 16810 mulgcddvds 16859 qredeu 16862 prmind2 16889 isprm5 16912 divgcdodd 16915 divnumden 16953 hashdvds 16981 hashgcdlem 16994 pythagtriplem19 17040 pcprendvds2 17048 pcpremul 17050 pc2dvds 17086 pcz 17088 dvdsprmpweqle 17093 pcadd 17096 pcmptdvds 17101 fldivp1 17104 pockthlem 17112 prmreclem1 17123 prmreclem3 17125 4sqlem8 17152 4sqlem9 17153 4sqlem12 17163 4sqlem14 17165 sylow1lem1 19842 sylow3lem4 19874 odadd1 20092 odadd2 20093 pgpfac1lem3 20323 prmirredlem 21808 znidomb 21897 root1eq1 27113 atantayl2 27296 efchtdvds 27516 muinv 27550 bposlem6 27646 lgseisenlem1 27732 lgsquad2lem1 27741 lgsquad3 27744 m1lgs 27745 2sqlem3 27777 2sqlem8 27783 qqhval2lem 34683 nn0prpwlem 37288 knoppndvlem8 37563 aks4d1p8d3 43328 aks4d1p8 43329 aks6d1c1 43358 aks6d1c3 43365 aks6d1c4 43366 aks6d1c2lem4 43369 aks6d1c6lem3 43414 aks6d1c6lem4 43415 unitscyglem4 43440 congrep 44173 jm2.22 44195 jm2.23 44196 proot1ex 44390 nzss 45493 etransclem9 47458 etransclem38 47487 etransclem44 47493 etransclem45 47494 facnn0dvdsfac 48660 divgcdoddALTV 48985 0dig2nn0o 49930

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