dvdsval2 - Intuitionistic Logic Explorer

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Theorem dvdsval2 12583

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 12582	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
2	1	3adant2 1047	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
3		zcn 9661	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℂ)
4	3	3ad2ant3 1051	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℂ)
5	4	adantr 276	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑁 ∈ ℂ)
6		zcn 9661	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℂ)
7	6	adantl 277	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑘 ∈ ℂ)
8		zcn 9661	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ)
9	8	3ad2ant1 1049	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ∈ ℂ)
10	9	adantr 276	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ∈ ℂ)
11		simpl2 1032	. . . . . . . . . 10 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 ≠ 0)
12		0z 9667	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℤ
13		zapne 9731	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ ℤ ∧ 0 ∈ ℤ) → (𝑀 # 0 ↔ 𝑀 ≠ 0))
14	12, 13	mpan2 429	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℤ → (𝑀 # 0 ↔ 𝑀 ≠ 0))
15	14	3ad2ant1 1049	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 # 0 ↔ 𝑀 ≠ 0))
16	15	adantr 276	. . . . . . . . . 10 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → (𝑀 # 0 ↔ 𝑀 ≠ 0))
17	11, 16	mpbird 167	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → 𝑀 # 0)
18	5, 7, 10, 17	divmulap3d 9164	. . . . . . . 8 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ 𝑁 = (𝑘 · 𝑀)))
19		eqcom 2240	. . . . . . . 8 ⊢ (𝑁 = (𝑘 · 𝑀) ↔ (𝑘 · 𝑀) = 𝑁)
20	18, 19	bitrdi 196	. . . . . . 7 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑁 / 𝑀) = 𝑘 ↔ (𝑘 · 𝑀) = 𝑁))
21	20	biimprd 158	. . . . . 6 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ 𝑘 ∈ ℤ) → ((𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) = 𝑘))
22	21	impr 379	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) = 𝑘)
23		simprl 535	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → 𝑘 ∈ ℤ)
24	22, 23	eqeltrd 2315	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑘 ∈ ℤ ∧ (𝑘 · 𝑀) = 𝑁)) → (𝑁 / 𝑀) ∈ ℤ)
25	24	rexlimdvaa 2669	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 → (𝑁 / 𝑀) ∈ ℤ))
26		simpr 110	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → (𝑁 / 𝑀) ∈ ℤ)
27		simp2 1029	. . . . . . . 8 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 ≠ 0)
28	27, 15	mpbird 167	. . . . . . 7 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → 𝑀 # 0)
29	4, 9, 28	divcanap1d 9130	. . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
30	29	adantr 276	. . . . 5 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ((𝑁 / 𝑀) · 𝑀) = 𝑁)
31		oveq1 6095	. . . . . . 7 ⊢ (𝑘 = (𝑁 / 𝑀) → (𝑘 · 𝑀) = ((𝑁 / 𝑀) · 𝑀))
32	31	eqeq1d 2247	. . . . . 6 ⊢ (𝑘 = (𝑁 / 𝑀) → ((𝑘 · 𝑀) = 𝑁 ↔ ((𝑁 / 𝑀) · 𝑀) = 𝑁))
33	32	rspcev 2929	. . . . 5 ⊢ (((𝑁 / 𝑀) ∈ ℤ ∧ ((𝑁 / 𝑀) · 𝑀) = 𝑁) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
34	26, 30, 33	syl2anc 415	. . . 4 ⊢ (((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 / 𝑀) ∈ ℤ) → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁)
35	34	ex 115	. . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → ((𝑁 / 𝑀) ∈ ℤ → ∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁))
36	25, 35	impbid 129	. 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (∃𝑘 ∈ ℤ (𝑘 · 𝑀) = 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))
37	2, 36	bitrd 188	1 ⊢ ((𝑀 ∈ ℤ ∧ 𝑀 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝑀 ∥ 𝑁 ↔ (𝑁 / 𝑀) ∈ ℤ))

Colors of variables: wff set class

This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 ≠ wne 2420 ∃wrex 2529 class class class wbr 4131 (class class class)co 6088 ℂcc 8184 0cc0 8186 · cmul 8191 # cap 8918 / cdiv 9011 ℤcz 9656 ∥ cdvds 12580

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-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8277 ax-resscn 8278 ax-1cn 8279 ax-1re 8280 ax-icn 8281 ax-addcl 8282 ax-addrcl 8283 ax-mulcl 8284 ax-mulrcl 8285 ax-addcom 8286 ax-mulcom 8287 ax-addass 8288 ax-mulass 8289 ax-distr 8290 ax-i2m1 8291 ax-0lt1 8292 ax-1rid 8293 ax-0id 8294 ax-rnegex 8295 ax-precex 8296 ax-cnre 8297 ax-pre-ltirr 8298 ax-pre-ltwlin 8299 ax-pre-lttrn 8300 ax-pre-apti 8301 ax-pre-ltadd 8302 ax-pre-mulgt0 8303 ax-pre-mulext 8304

This proof depends on definitions: df-bi 117 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-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-id 4440 df-po 4443 df-iso 4444 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-iota 5340 df-fun 5382 df-fv 5388 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-pnf 8369 df-mnf 8370 df-xr 8371 df-ltxr 8372 df-le 8373 df-sub 8507 df-neg 8508 df-reap 8912 df-ap 8919 df-div 9012 df-inn 9315 df-n0 9576 df-z 9657 df-dvds 12581

This theorem is used by: dvdsval3 12584 nndivdvds 12589 fsumdvds 12635 divconjdvds 12642 3dvds 12657 zeo3 12661 evend2 12682 oddp1d2 12683 fldivndvdslt 12730 bitsmod 12749 divgcdz 12774 dvdsgcdidd 12797 mulgcd 12819 sqgcd 12832 lcmgcdlem 12881 mulgcddvds 12898 qredeu 12901 prmind2 12924 isprm5lem 12946 divgcdodd 12948 divnumden 13002 hashdvds 13029 hashgcdlem 13046 pythagtriplem19 13091 pcprendvds2 13100 pcpremul 13102 pc2dvds 13139 pcz 13141 dvdsprmpweqle 13146 pcadd 13149 pcmptdvds 13154 fldivp1 13157 pockthlem 13165 4sqlem8 13194 4sqlem9 13195 4sqlem12 13211 4sqlem14 13213 znidomb 15103 efchtqdvds 16277 bposlem6 16328 lgseisenlem1 16406 lgsquad2lem1 16417 lgsquad3 16420 m1lgs 16421 2sqlem3 16453 2sqlem8 16459

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