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Theorem prmdivdiv 12169
Description: The (modular) inverse of the inverse of a number is itself. (Contributed by Mario Carneiro, 24-Jan-2015.)
Hypothesis
Ref Expression
prmdiv.1  |-  R  =  ( ( A ^
( P  -  2 ) )  mod  P
)
Assertion
Ref Expression
prmdivdiv  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  =  ( ( R ^ ( P  - 
2 ) )  mod 
P ) )

Proof of Theorem prmdivdiv
StepHypRef Expression
1 fz1ssfz0 10052 . . 3  |-  ( 1 ... ( P  - 
1 ) )  C_  ( 0 ... ( P  -  1 ) )
2 simpr 109 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 1 ... ( P  -  1 ) ) )
31, 2sselid 3140 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 0 ... ( P  -  1 ) ) )
4 simpl 108 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  e.  Prime )
5 elfznn 9989 . . . . . . 7  |-  ( A  e.  ( 1 ... ( P  -  1 ) )  ->  A  e.  NN )
65adantl 275 . . . . . 6  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  NN )
76nnzd 9312 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ZZ )
8 prmnn 12042 . . . . . 6  |-  ( P  e.  Prime  ->  P  e.  NN )
9 fzm1ndvds 11794 . . . . . 6  |-  ( ( P  e.  NN  /\  A  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  A
)
108, 9sylan 281 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  A )
11 prmdiv.1 . . . . . 6  |-  R  =  ( ( A ^
( P  -  2 ) )  mod  P
)
1211prmdiv 12167 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ZZ  /\  -.  P  ||  A )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
134, 7, 10, 12syl3anc 1228 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
1413simprd 113 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( A  x.  R )  -  1 ) )
156nncnd 8871 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  CC )
1613simpld 111 . . . . . . 7  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  ( 1 ... ( P  -  1 ) ) )
17 elfznn 9989 . . . . . . 7  |-  ( R  e.  ( 1 ... ( P  -  1 ) )  ->  R  e.  NN )
1816, 17syl 14 . . . . . 6  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  NN )
1918nncnd 8871 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  CC )
2015, 19mulcomd 7920 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( A  x.  R )  =  ( R  x.  A ) )
2120oveq1d 5857 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  (
( A  x.  R
)  -  1 )  =  ( ( R  x.  A )  - 
1 ) )
2214, 21breqtrd 4008 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( R  x.  A )  -  1 ) )
23 elfzelz 9960 . . . 4  |-  ( R  e.  ( 1 ... ( P  -  1 ) )  ->  R  e.  ZZ )
2416, 23syl 14 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  ZZ )
25 fzm1ndvds 11794 . . . 4  |-  ( ( P  e.  NN  /\  R  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  R
)
268, 16, 25syl2an2r 585 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  R )
27 eqid 2165 . . . 4  |-  ( ( R ^ ( P  -  2 ) )  mod  P )  =  ( ( R ^
( P  -  2 ) )  mod  P
)
2827prmdiveq 12168 . . 3  |-  ( ( P  e.  Prime  /\  R  e.  ZZ  /\  -.  P  ||  R )  ->  (
( A  e.  ( 0 ... ( P  -  1 ) )  /\  P  ||  (
( R  x.  A
)  -  1 ) )  <->  A  =  (
( R ^ ( P  -  2 ) )  mod  P ) ) )
294, 24, 26, 28syl3anc 1228 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  (
( A  e.  ( 0 ... ( P  -  1 ) )  /\  P  ||  (
( R  x.  A
)  -  1 ) )  <->  A  =  (
( R ^ ( P  -  2 ) )  mod  P ) ) )
303, 22, 29mpbi2and 933 1  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  =  ( ( R ^ ( P  - 
2 ) )  mod 
P ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 103    <-> wb 104    = wceq 1343    e. wcel 2136   class class class wbr 3982  (class class class)co 5842   0cc0 7753   1c1 7754    x. cmul 7758    - cmin 8069   NNcn 8857   2c2 8908   ZZcz 9191   ...cfz 9944    mod cmo 10257   ^cexp 10454    || cdvds 11727   Primecprime 12039
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-coll 4097  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-setind 4514  ax-iinf 4565  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  ax-caucvg 7873
This theorem depends on definitions:  df-bi 116  df-stab 821  df-dc 825  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-nul 3410  df-if 3521  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-tr 4081  df-id 4271  df-po 4274  df-iso 4275  df-iord 4344  df-on 4346  df-ilim 4347  df-suc 4349  df-iom 4568  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-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-isom 5197  df-riota 5798  df-ov 5845  df-oprab 5846  df-mpo 5847  df-1st 6108  df-2nd 6109  df-recs 6273  df-irdg 6338  df-frec 6359  df-1o 6384  df-2o 6385  df-oadd 6388  df-er 6501  df-en 6707  df-dom 6708  df-fin 6709  df-sup 6949  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-2 8916  df-3 8917  df-4 8918  df-n0 9115  df-z 9192  df-uz 9467  df-q 9558  df-rp 9590  df-fz 9945  df-fzo 10078  df-fl 10205  df-mod 10258  df-seqfrec 10381  df-exp 10455  df-ihash 10689  df-cj 10784  df-re 10785  df-im 10786  df-rsqrt 10940  df-abs 10941  df-clim 11220  df-proddc 11492  df-dvds 11728  df-gcd 11876  df-prm 12040  df-phi 12143
This theorem is referenced by: (None)
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