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Theorem dvds2sub 14313
Description: If an integer divides each of two other integers, it divides their difference. (Contributed by Paul Chapman, 21-Mar-2011.)
Assertion
Ref Expression
dvds2sub  |-  ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  ->  (
( K  ||  M  /\  K  ||  N )  ->  K  ||  ( M  -  N )
) )

Proof of Theorem dvds2sub
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 3simpa 1002 . 2  |-  ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  ->  ( K  e.  ZZ  /\  M  e.  ZZ ) )
2 3simpb 1003 . 2  |-  ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  ->  ( K  e.  ZZ  /\  N  e.  ZZ ) )
3 zsubcl 10979 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  -  N
)  e.  ZZ )
43anim2i 571 . . 3  |-  ( ( K  e.  ZZ  /\  ( M  e.  ZZ  /\  N  e.  ZZ ) )  ->  ( K  e.  ZZ  /\  ( M  -  N )  e.  ZZ ) )
543impb 1201 . 2  |-  ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  ->  ( K  e.  ZZ  /\  ( M  -  N )  e.  ZZ ) )
6 zsubcl 10979 . . 3  |-  ( ( x  e.  ZZ  /\  y  e.  ZZ )  ->  ( x  -  y
)  e.  ZZ )
76adantl 467 . 2  |-  ( ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  /\  ( x  e.  ZZ  /\  y  e.  ZZ ) )  ->  ( x  -  y )  e.  ZZ )
8 zcn 10942 . . . . . . . 8  |-  ( x  e.  ZZ  ->  x  e.  CC )
9 zcn 10942 . . . . . . . 8  |-  ( y  e.  ZZ  ->  y  e.  CC )
10 zcn 10942 . . . . . . . 8  |-  ( K  e.  ZZ  ->  K  e.  CC )
11 subdir 10052 . . . . . . . 8  |-  ( ( x  e.  CC  /\  y  e.  CC  /\  K  e.  CC )  ->  (
( x  -  y
)  x.  K )  =  ( ( x  x.  K )  -  ( y  x.  K
) ) )
128, 9, 10, 11syl3an 1306 . . . . . . 7  |-  ( ( x  e.  ZZ  /\  y  e.  ZZ  /\  K  e.  ZZ )  ->  (
( x  -  y
)  x.  K )  =  ( ( x  x.  K )  -  ( y  x.  K
) ) )
13123comr 1213 . . . . . 6  |-  ( ( K  e.  ZZ  /\  x  e.  ZZ  /\  y  e.  ZZ )  ->  (
( x  -  y
)  x.  K )  =  ( ( x  x.  K )  -  ( y  x.  K
) ) )
14133expb 1206 . . . . 5  |-  ( ( K  e.  ZZ  /\  ( x  e.  ZZ  /\  y  e.  ZZ ) )  ->  ( (
x  -  y )  x.  K )  =  ( ( x  x.  K )  -  (
y  x.  K ) ) )
15 oveq12 6314 . . . . 5  |-  ( ( ( x  x.  K
)  =  M  /\  ( y  x.  K
)  =  N )  ->  ( ( x  x.  K )  -  ( y  x.  K
) )  =  ( M  -  N ) )
1614, 15sylan9eq 2490 . . . 4  |-  ( ( ( K  e.  ZZ  /\  ( x  e.  ZZ  /\  y  e.  ZZ ) )  /\  ( ( x  x.  K )  =  M  /\  (
y  x.  K )  =  N ) )  ->  ( ( x  -  y )  x.  K )  =  ( M  -  N ) )
1716ex 435 . . 3  |-  ( ( K  e.  ZZ  /\  ( x  e.  ZZ  /\  y  e.  ZZ ) )  ->  ( (
( x  x.  K
)  =  M  /\  ( y  x.  K
)  =  N )  ->  ( ( x  -  y )  x.  K )  =  ( M  -  N ) ) )
18173ad2antl1 1167 . 2  |-  ( ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  /\  ( x  e.  ZZ  /\  y  e.  ZZ ) )  ->  ( (
( x  x.  K
)  =  M  /\  ( y  x.  K
)  =  N )  ->  ( ( x  -  y )  x.  K )  =  ( M  -  N ) ) )
191, 2, 5, 7, 18dvds2lem 14293 1  |-  ( ( K  e.  ZZ  /\  M  e.  ZZ  /\  N  e.  ZZ )  ->  (
( K  ||  M  /\  K  ||  N )  ->  K  ||  ( M  -  N )
) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 370    /\ w3a 982    = wceq 1437    e. wcel 1870   class class class wbr 4426  (class class class)co 6305   CCcc 9536    x. cmul 9543    - cmin 9859   ZZcz 10937    || cdvds 14283
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1665  ax-4 1678  ax-5 1751  ax-6 1797  ax-7 1841  ax-8 1872  ax-9 1874  ax-10 1889  ax-11 1894  ax-12 1907  ax-13 2055  ax-ext 2407  ax-sep 4548  ax-nul 4556  ax-pow 4603  ax-pr 4661  ax-un 6597  ax-resscn 9595  ax-1cn 9596  ax-icn 9597  ax-addcl 9598  ax-addrcl 9599  ax-mulcl 9600  ax-mulrcl 9601  ax-mulcom 9602  ax-addass 9603  ax-mulass 9604  ax-distr 9605  ax-i2m1 9606  ax-1ne0 9607  ax-1rid 9608  ax-rnegex 9609  ax-rrecex 9610  ax-cnre 9611  ax-pre-lttri 9612  ax-pre-lttrn 9613  ax-pre-ltadd 9614  ax-pre-mulgt0 9615
This theorem depends on definitions:  df-bi 188  df-or 371  df-an 372  df-3or 983  df-3an 984  df-tru 1440  df-ex 1660  df-nf 1664  df-sb 1790  df-eu 2270  df-mo 2271  df-clab 2415  df-cleq 2421  df-clel 2424  df-nfc 2579  df-ne 2627  df-nel 2628  df-ral 2787  df-rex 2788  df-reu 2789  df-rab 2791  df-v 3089  df-sbc 3306  df-csb 3402  df-dif 3445  df-un 3447  df-in 3449  df-ss 3456  df-pss 3458  df-nul 3768  df-if 3916  df-pw 3987  df-sn 4003  df-pr 4005  df-tp 4007  df-op 4009  df-uni 4223  df-iun 4304  df-br 4427  df-opab 4485  df-mpt 4486  df-tr 4521  df-eprel 4765  df-id 4769  df-po 4775  df-so 4776  df-fr 4813  df-we 4815  df-xp 4860  df-rel 4861  df-cnv 4862  df-co 4863  df-dm 4864  df-rn 4865  df-res 4866  df-ima 4867  df-pred 5399  df-ord 5445  df-on 5446  df-lim 5447  df-suc 5448  df-iota 5565  df-fun 5603  df-fn 5604  df-f 5605  df-f1 5606  df-fo 5607  df-f1o 5608  df-fv 5609  df-riota 6267  df-ov 6308  df-oprab 6309  df-mpt2 6310  df-om 6707  df-wrecs 7036  df-recs 7098  df-rdg 7136  df-er 7371  df-en 7578  df-dom 7579  df-sdom 7580  df-pnf 9676  df-mnf 9677  df-xr 9678  df-ltxr 9679  df-le 9680  df-sub 9861  df-neg 9862  df-nn 10610  df-n0 10870  df-z 10938  df-dvds 14284
This theorem is referenced by:  dvds2subd  14314  dvdssub2  14320  divalglem9  14357  prmdiv  14702  prmdiveq  14703  4sqlem10  14854  4sqlem14OLD  14865  4sqlem14  14871  poimirlem28  31672  jm2.20nn  35558  dvdsn1add  37383
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