dvdsval2 - Metamath Proof Explorer

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Theorem dvdsval2 16265

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 16264	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
2	1	3adant2 1140	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
3		zcn 12563	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
4	3	3ad2ant3 1144	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℂ)
5	4	adantr 483	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑁 ∈ ℂ)
6		zcn 12563	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ)
7	6	adantl 484	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ)
8		zcn 12563	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
9	8	3ad2ant1 1142	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ∈ ℂ)
10	9	adantr 483	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ)
11		simpl2 1202	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0)
12	5, 7, 10, 11	divmul3d 11991	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ 𝑁 = (𝑘 · 𝑀)))
13		eqcom 2763	. . . . . . . 8 ⊢ (𝑁 = (𝑘 · 𝑀) ↔ (𝑘 · 𝑀) = 𝑁)
14	12, 13	bitrdi 289	. . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ (𝑘 · 𝑀) = 𝑁))
15	14	biimprd 250	. . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) = 𝑘))
16	15	impr 457	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) = 𝑘)
17		simprl 778	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → 𝑘 ∈ ℤ)
18	16, 17	eqeltrd 2856	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) ∈ ℤ)
19	18	rexlimdvaa 3158	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ))
20		simpr 487	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → (𝑁 / 𝑀) ∈ ℤ)
21		simp2 1146	. . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0)
22	4, 9, 21	divcan1d 11958	. . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
23	22	adantr 483	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
24		oveq1 7392	. . . . . . 7 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑘 · 𝑀) = ((𝑁 / 𝑀) · 𝑀))
25	24	eqeq1d 2758	. . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑘 · 𝑀) = 𝑁 ↔ ((𝑁 / 𝑀) · 𝑀) = 𝑁))
26	25	rspcev 3576	. . . . 5 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ ((𝑁 / 𝑀) · 𝑀) = 𝑁) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
27	20, 23, 26	syl2anc 592	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
28	27	ex 415	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
29	19, 28	impbid 214	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))
30	2, 29	bitrd 281	1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1095 = wceq 1554 ∈ wcel 2136 ≠ wne 2951 ∃wrex 3080 class class class wbr 5094 (class class class)co 7385 ℂcc 11061 0cc0 11063 · cmul 11068 / cdiv 11834 ℤcz 12558 ∥ cdvds 16262

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1809 ax-4 1823 ax-5 1924 ax-6 1981 ax-7 2022 ax-8 2138 ax-9 2146 ax-10 2169 ax-11 2185 ax-12 2206 ax-ext 2728 ax-sep 5240 ax-nul 5250 ax-pow 5316 ax-pr 5384 ax-un 7707 ax-resscn 11120 ax-1cn 11121 ax-icn 11122 ax-addcl 11123 ax-addrcl 11124 ax-mulcl 11125 ax-mulrcl 11126 ax-mulcom 11127 ax-addass 11128 ax-mulass 11129 ax-distr 11130 ax-i2m1 11131 ax-1ne0 11132 ax-1rid 11133 ax-rnegex 11134 ax-rrecex 11135 ax-cnre 11136 ax-pre-lttri 11137 ax-pre-lttrn 11138 ax-pre-ltadd 11139 ax-pre-mulgt0 11140

This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1557 df-fal 1567 df-ex 1794 df-nf 1798 df-sb 2085 df-mo 2560 df-eu 2590 df-clab 2735 df-cleq 2748 df-clel 2831 df-nfc 2905 df-ne 2952 df-nel 3056 df-ral 3071 df-rex 3081 df-rmo 3361 df-reu 3362 df-rab 3409 df-v 3450 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4281 df-if 4475 df-pw 4551 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5095 df-opab 5157 df-mpt 5176 df-id 5535 df-po 5548 df-so 5549 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-iota 6466 df-fun 6512 df-fn 6513 df-f 6514 df-f1 6515 df-fo 6516 df-f1o 6517 df-fv 6518 df-riota 7342 df-ov 7388 df-oprab 7389 df-mpo 7390 df-er 8666 df-en 8917 df-dom 8918 df-sdom 8919 df-pnf 11208 df-mnf 11209 df-xr 11210 df-ltxr 11211 df-le 11212 df-sub 11406 df-neg 11407 df-div 11835 df-z 12559 df-dvds 16263

This theorem is referenced by: dvdsval3 16266 nndivdvds 16271 fsumdvds 16318 divconjdvds 16325 3dvds 16341 evend2 16367 oddp1d2 16368 fldivndvdslt 16426 bitsmod 16446 sadaddlem 16476 bitsuz 16484 divgcdz 16521 dvdsgcdidd 16547 mulgcd 16558 sqgcd 16572 lcmgcdlem 16616 mulgcddvds 16665 qredeu 16668 prmind2 16695 isprm5 16718 divgcdodd 16721 divnumden 16759 hashdvds 16786 hashgcdlem 16799 pythagtriplem19 16845 pcprendvds2 16853 pcpremul 16855 pc2dvds 16891 pcz 16893 dvdsprmpweqle 16898 pcadd 16901 pcmptdvds 16906 fldivp1 16909 pockthlem 16917 prmreclem1 16928 prmreclem3 16930 4sqlem8 16957 4sqlem9 16958 4sqlem12 16968 4sqlem14 16970 sylow1lem1 19614 sylow3lem4 19646 odadd1 19864 odadd2 19865 pgpfac1lem3 20095 prmirredlem 21497 znidomb 21586 root1eq1 26790 atantayl2 26973 efchtdvds 27193 muinv 27227 bposlem6 27323 lgseisenlem1 27409 lgsquad2lem1 27418 lgsquad3 27421 m1lgs 27422 2sqlem3 27454 2sqlem8 27460 qqhval2lem 34232 nn0prpwlem 36630 knoppndvlem8 36905 aks4d1p8d3 42651 aks4d1p8 42652 aks6d1c1 42681 aks6d1c3 42688 aks6d1c4 42689 aks6d1c2lem4 42692 aks6d1c6lem3 42737 aks6d1c6lem4 42738 unitscyglem4 42763 congrep 43498 jm2.22 43520 jm2.23 43521 proot1ex 43721 nzss 44841 etransclem9 46765 etransclem38 46794 etransclem44 46800 etransclem45 46801 facnn0dvdsfac 47927 divgcdoddALTV 48252 0dig2nn0o 49183

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