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Theorem intfracq 10255
Description: Decompose a rational number, expressed as a ratio, into integer and fractional parts. The fractional part has a tighter bound than that of intqfrac2 10254. (Contributed by NM, 16-Aug-2008.)
Hypotheses
Ref Expression
intfracq.1  |-  Z  =  ( |_ `  ( M  /  N ) )
intfracq.2  |-  F  =  ( ( M  /  N )  -  Z
)
Assertion
Ref Expression
intfracq  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( 0  <_  F  /\  F  <_  ( ( N  -  1 )  /  N )  /\  ( M  /  N
)  =  ( Z  +  F ) ) )

Proof of Theorem intfracq
StepHypRef Expression
1 znq 9562 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( M  /  N
)  e.  QQ )
2 intfracq.1 . . . . 5  |-  Z  =  ( |_ `  ( M  /  N ) )
3 intfracq.2 . . . . 5  |-  F  =  ( ( M  /  N )  -  Z
)
42, 3intqfrac2 10254 . . . 4  |-  ( ( M  /  N )  e.  QQ  ->  (
0  <_  F  /\  F  <  1  /\  ( M  /  N )  =  ( Z  +  F
) ) )
51, 4syl 14 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( 0  <_  F  /\  F  <  1  /\  ( M  /  N
)  =  ( Z  +  F ) ) )
65simp1d 999 . 2  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  0  <_  F )
7 qfraclt1 10215 . . . . . . 7  |-  ( ( M  /  N )  e.  QQ  ->  (
( M  /  N
)  -  ( |_
`  ( M  /  N ) ) )  <  1 )
81, 7syl 14 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( M  /  N )  -  ( |_ `  ( M  /  N ) ) )  <  1 )
92oveq2i 5853 . . . . . . . 8  |-  ( ( M  /  N )  -  Z )  =  ( ( M  /  N )  -  ( |_ `  ( M  /  N ) ) )
103, 9eqtri 2186 . . . . . . 7  |-  F  =  ( ( M  /  N )  -  ( |_ `  ( M  /  N ) ) )
1110a1i 9 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  F  =  ( ( M  /  N )  -  ( |_ `  ( M  /  N
) ) ) )
12 simpr 109 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  N  e.  NN )
1312nncnd 8871 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  N  e.  CC )
1412nnap0d 8903 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  N #  0 )
1513, 14dividapd 8682 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  /  N
)  =  1 )
168, 11, 153brtr4d 4014 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  F  <  ( N  /  N ) )
17 qre 9563 . . . . . . . . 9  |-  ( ( M  /  N )  e.  QQ  ->  ( M  /  N )  e.  RR )
181, 17syl 14 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( M  /  N
)  e.  RR )
191flqcld 10212 . . . . . . . . . 10  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( |_ `  ( M  /  N ) )  e.  ZZ )
202, 19eqeltrid 2253 . . . . . . . . 9  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  Z  e.  ZZ )
2120zred 9313 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  Z  e.  RR )
2218, 21resubcld 8279 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( M  /  N )  -  Z
)  e.  RR )
233, 22eqeltrid 2253 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  F  e.  RR )
24 nnre 8864 . . . . . . 7  |-  ( N  e.  NN  ->  N  e.  RR )
2524adantl 275 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  N  e.  RR )
26 nngt0 8882 . . . . . . . 8  |-  ( N  e.  NN  ->  0  <  N )
2724, 26jca 304 . . . . . . 7  |-  ( N  e.  NN  ->  ( N  e.  RR  /\  0  <  N ) )
2827adantl 275 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  e.  RR  /\  0  <  N ) )
29 ltmuldiv2 8770 . . . . . 6  |-  ( ( F  e.  RR  /\  N  e.  RR  /\  ( N  e.  RR  /\  0  <  N ) )  -> 
( ( N  x.  F )  <  N  <->  F  <  ( N  /  N ) ) )
3023, 25, 28, 29syl3anc 1228 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( N  x.  F )  <  N  <->  F  <  ( N  /  N ) ) )
3116, 30mpbird 166 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  F
)  <  N )
323oveq2i 5853 . . . . . . 7  |-  ( N  x.  F )  =  ( N  x.  (
( M  /  N
)  -  Z ) )
3318recnd 7927 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( M  /  N
)  e.  CC )
3420zcnd 9314 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  Z  e.  CC )
3513, 33, 34subdid 8312 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  (
( M  /  N
)  -  Z ) )  =  ( ( N  x.  ( M  /  N ) )  -  ( N  x.  Z ) ) )
3632, 35syl5eq 2211 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  F
)  =  ( ( N  x.  ( M  /  N ) )  -  ( N  x.  Z ) ) )
37 zcn 9196 . . . . . . . . . 10  |-  ( M  e.  ZZ  ->  M  e.  CC )
3837adantr 274 . . . . . . . . 9  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  M  e.  CC )
3938, 13, 14divcanap2d 8688 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  ( M  /  N ) )  =  M )
40 simpl 108 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  M  e.  ZZ )
4139, 40eqeltrd 2243 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  ( M  /  N ) )  e.  ZZ )
42 nnz 9210 . . . . . . . . 9  |-  ( N  e.  NN  ->  N  e.  ZZ )
4342adantl 275 . . . . . . . 8  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  N  e.  ZZ )
4443, 20zmulcld 9319 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  Z
)  e.  ZZ )
4541, 44zsubcld 9318 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( N  x.  ( M  /  N
) )  -  ( N  x.  Z )
)  e.  ZZ )
4636, 45eqeltrd 2243 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  F
)  e.  ZZ )
47 zltlem1 9248 . . . . 5  |-  ( ( ( N  x.  F
)  e.  ZZ  /\  N  e.  ZZ )  ->  ( ( N  x.  F )  <  N  <->  ( N  x.  F )  <_  ( N  - 
1 ) ) )
4846, 43, 47syl2anc 409 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( N  x.  F )  <  N  <->  ( N  x.  F )  <_  ( N  - 
1 ) ) )
4931, 48mpbid 146 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  x.  F
)  <_  ( N  -  1 ) )
50 peano2rem 8165 . . . . . 6  |-  ( N  e.  RR  ->  ( N  -  1 )  e.  RR )
5124, 50syl 14 . . . . 5  |-  ( N  e.  NN  ->  ( N  -  1 )  e.  RR )
5251adantl 275 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( N  -  1 )  e.  RR )
53 lemuldiv2 8777 . . . 4  |-  ( ( F  e.  RR  /\  ( N  -  1
)  e.  RR  /\  ( N  e.  RR  /\  0  <  N ) )  ->  ( ( N  x.  F )  <_  ( N  -  1 )  <->  F  <_  ( ( N  -  1 )  /  N ) ) )
5423, 52, 28, 53syl3anc 1228 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( ( N  x.  F )  <_  ( N  -  1 )  <-> 
F  <_  ( ( N  -  1 )  /  N ) ) )
5549, 54mpbid 146 . 2  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  F  <_  ( ( N  -  1 )  /  N ) )
565simp3d 1001 . 2  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( M  /  N
)  =  ( Z  +  F ) )
576, 55, 563jca 1167 1  |-  ( ( M  e.  ZZ  /\  N  e.  NN )  ->  ( 0  <_  F  /\  F  <_  ( ( N  -  1 )  /  N )  /\  ( M  /  N
)  =  ( Z  +  F ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    /\ w3a 968    = wceq 1343    e. wcel 2136   class class class wbr 3982   ` cfv 5188  (class class class)co 5842   CCcc 7751   RRcr 7752   0cc0 7753   1c1 7754    + caddc 7756    x. cmul 7758    < clt 7933    <_ cle 7934    - cmin 8069    / cdiv 8568   NNcn 8857   ZZcz 9191   QQcq 9557   |_cfl 10203
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-setind 4514  ax-cnex 7844  ax-resscn 7845  ax-1cn 7846  ax-1re 7847  ax-icn 7848  ax-addcl 7849  ax-addrcl 7850  ax-mulcl 7851  ax-mulrcl 7852  ax-addcom 7853  ax-mulcom 7854  ax-addass 7855  ax-mulass 7856  ax-distr 7857  ax-i2m1 7858  ax-0lt1 7859  ax-1rid 7860  ax-0id 7861  ax-rnegex 7862  ax-precex 7863  ax-cnre 7864  ax-pre-ltirr 7865  ax-pre-ltwlin 7866  ax-pre-lttrn 7867  ax-pre-apti 7868  ax-pre-ltadd 7869  ax-pre-mulgt0 7870  ax-pre-mulext 7871  ax-arch 7872
This theorem depends on definitions:  df-bi 116  df-3or 969  df-3an 970  df-tru 1346  df-fal 1349  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-nel 2432  df-ral 2449  df-rex 2450  df-reu 2451  df-rmo 2452  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-int 3825  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-id 4271  df-po 4274  df-iso 4275  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-fv 5196  df-riota 5798  df-ov 5845  df-oprab 5846  df-mpo 5847  df-1st 6108  df-2nd 6109  df-pnf 7935  df-mnf 7936  df-xr 7937  df-ltxr 7938  df-le 7939  df-sub 8071  df-neg 8072  df-reap 8473  df-ap 8480  df-div 8569  df-inn 8858  df-n0 9115  df-z 9192  df-q 9558  df-rp 9590  df-fl 10205
This theorem is referenced by:  flqdiv  10256
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