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Theorem prmdivdiv 12250
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 10130 . . 3  |-  ( 1 ... ( P  - 
1 ) )  C_  ( 0 ... ( P  -  1 ) )
2 simpr 110 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 1 ... ( P  -  1 ) ) )
31, 2sselid 3165 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 0 ... ( P  -  1 ) ) )
4 simpl 109 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  e.  Prime )
5 elfznn 10067 . . . . . . 7  |-  ( A  e.  ( 1 ... ( P  -  1 ) )  ->  A  e.  NN )
65adantl 277 . . . . . 6  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  NN )
76nnzd 9387 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ZZ )
8 prmnn 12123 . . . . . 6  |-  ( P  e.  Prime  ->  P  e.  NN )
9 fzm1ndvds 11875 . . . . . 6  |-  ( ( P  e.  NN  /\  A  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  A
)
108, 9sylan 283 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  A )
11 prmdiv.1 . . . . . 6  |-  R  =  ( ( A ^
( P  -  2 ) )  mod  P
)
1211prmdiv 12248 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ZZ  /\  -.  P  ||  A )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
134, 7, 10, 12syl3anc 1248 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
1413simprd 114 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( A  x.  R )  -  1 ) )
156nncnd 8946 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  CC )
1613simpld 112 . . . . . . 7  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  ( 1 ... ( P  -  1 ) ) )
17 elfznn 10067 . . . . . . 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 8946 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  CC )
2015, 19mulcomd 7992 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( A  x.  R )  =  ( R  x.  A ) )
2120oveq1d 5903 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  (
( A  x.  R
)  -  1 )  =  ( ( R  x.  A )  - 
1 ) )
2214, 21breqtrd 4041 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( R  x.  A )  -  1 ) )
23 elfzelz 10038 . . . 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 11875 . . . 4  |-  ( ( P  e.  NN  /\  R  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  R
)
268, 16, 25syl2an2r 595 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  R )
27 eqid 2187 . . . 4  |-  ( ( R ^ ( P  -  2 ) )  mod  P )  =  ( ( R ^
( P  -  2 ) )  mod  P
)
2827prmdiveq 12249 . . 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 1248 . 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 944 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 104    <-> wb 105    = wceq 1363    e. wcel 2158   class class class wbr 4015  (class class class)co 5888   0cc0 7824   1c1 7825    x. cmul 7829    - cmin 8141   NNcn 8932   2c2 8983   ZZcz 9266   ...cfz 10021    mod cmo 10335   ^cexp 10532    || cdvds 11807   Primecprime 12120
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1457  ax-7 1458  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-8 1514  ax-10 1515  ax-11 1516  ax-i12 1517  ax-bndl 1519  ax-4 1520  ax-17 1536  ax-i9 1540  ax-ial 1544  ax-i5r 1545  ax-13 2160  ax-14 2161  ax-ext 2169  ax-coll 4130  ax-sep 4133  ax-nul 4141  ax-pow 4186  ax-pr 4221  ax-un 4445  ax-setind 4548  ax-iinf 4599  ax-cnex 7915  ax-resscn 7916  ax-1cn 7917  ax-1re 7918  ax-icn 7919  ax-addcl 7920  ax-addrcl 7921  ax-mulcl 7922  ax-mulrcl 7923  ax-addcom 7924  ax-mulcom 7925  ax-addass 7926  ax-mulass 7927  ax-distr 7928  ax-i2m1 7929  ax-0lt1 7930  ax-1rid 7931  ax-0id 7932  ax-rnegex 7933  ax-precex 7934  ax-cnre 7935  ax-pre-ltirr 7936  ax-pre-ltwlin 7937  ax-pre-lttrn 7938  ax-pre-apti 7939  ax-pre-ltadd 7940  ax-pre-mulgt0 7941  ax-pre-mulext 7942  ax-arch 7943  ax-caucvg 7944
This theorem depends on definitions:  df-bi 117  df-stab 832  df-dc 836  df-3or 980  df-3an 981  df-tru 1366  df-fal 1369  df-nf 1471  df-sb 1773  df-eu 2039  df-mo 2040  df-clab 2174  df-cleq 2180  df-clel 2183  df-nfc 2318  df-ne 2358  df-nel 2453  df-ral 2470  df-rex 2471  df-reu 2472  df-rmo 2473  df-rab 2474  df-v 2751  df-sbc 2975  df-csb 3070  df-dif 3143  df-un 3145  df-in 3147  df-ss 3154  df-nul 3435  df-if 3547  df-pw 3589  df-sn 3610  df-pr 3611  df-op 3613  df-uni 3822  df-int 3857  df-iun 3900  df-br 4016  df-opab 4077  df-mpt 4078  df-tr 4114  df-id 4305  df-po 4308  df-iso 4309  df-iord 4378  df-on 4380  df-ilim 4381  df-suc 4383  df-iom 4602  df-xp 4644  df-rel 4645  df-cnv 4646  df-co 4647  df-dm 4648  df-rn 4649  df-res 4650  df-ima 4651  df-iota 5190  df-fun 5230  df-fn 5231  df-f 5232  df-f1 5233  df-fo 5234  df-f1o 5235  df-fv 5236  df-isom 5237  df-riota 5844  df-ov 5891  df-oprab 5892  df-mpo 5893  df-1st 6154  df-2nd 6155  df-recs 6319  df-irdg 6384  df-frec 6405  df-1o 6430  df-2o 6431  df-oadd 6434  df-er 6548  df-en 6754  df-dom 6755  df-fin 6756  df-sup 6996  df-pnf 8007  df-mnf 8008  df-xr 8009  df-ltxr 8010  df-le 8011  df-sub 8143  df-neg 8144  df-reap 8545  df-ap 8552  df-div 8643  df-inn 8933  df-2 8991  df-3 8992  df-4 8993  df-n0 9190  df-z 9267  df-uz 9542  df-q 9633  df-rp 9667  df-fz 10022  df-fzo 10156  df-fl 10283  df-mod 10336  df-seqfrec 10459  df-exp 10533  df-ihash 10769  df-cj 10864  df-re 10865  df-im 10866  df-rsqrt 11020  df-abs 11021  df-clim 11300  df-proddc 11572  df-dvds 11808  df-gcd 11957  df-prm 12121  df-phi 12224
This theorem is referenced by: (None)
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