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Theorem prmdivdiv 13178
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 1e0p1 10412 . . . . 5  |-  1  =  ( 0  +  1 )
21oveq1i 6093 . . . 4  |-  ( 1 ... ( P  - 
1 ) )  =  ( ( 0  +  1 ) ... ( P  -  1 ) )
3 0z 10295 . . . . 5  |-  0  e.  ZZ
4 fzp1ss 11100 . . . . 5  |-  ( 0  e.  ZZ  ->  (
( 0  +  1 ) ... ( P  -  1 ) ) 
C_  ( 0 ... ( P  -  1 ) ) )
53, 4ax-mp 8 . . . 4  |-  ( ( 0  +  1 ) ... ( P  - 
1 ) )  C_  ( 0 ... ( P  -  1 ) )
62, 5eqsstri 3380 . . 3  |-  ( 1 ... ( P  - 
1 ) )  C_  ( 0 ... ( P  -  1 ) )
7 simpr 449 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 1 ... ( P  -  1 ) ) )
86, 7sseldi 3348 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ( 0 ... ( P  -  1 ) ) )
9 simpl 445 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  e.  Prime )
10 elfznn 11082 . . . . . . 7  |-  ( A  e.  ( 1 ... ( P  -  1 ) )  ->  A  e.  NN )
1110adantl 454 . . . . . 6  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  NN )
1211nnzd 10376 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  ZZ )
13 prmnn 13084 . . . . . 6  |-  ( P  e.  Prime  ->  P  e.  NN )
14 fzm1ndvds 12903 . . . . . 6  |-  ( ( P  e.  NN  /\  A  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  A
)
1513, 14sylan 459 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  A )
16 prmdiv.1 . . . . . 6  |-  R  =  ( ( A ^
( P  -  2 ) )  mod  P
)
1716prmdiv 13176 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ZZ  /\  -.  P  ||  A )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
189, 12, 15, 17syl3anc 1185 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( R  e.  ( 1 ... ( P  - 
1 ) )  /\  P  ||  ( ( A  x.  R )  - 
1 ) ) )
1918simprd 451 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( A  x.  R )  -  1 ) )
2011nncnd 10018 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  A  e.  CC )
2118simpld 447 . . . . . . 7  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  ( 1 ... ( P  -  1 ) ) )
22 elfznn 11082 . . . . . . 7  |-  ( R  e.  ( 1 ... ( P  -  1 ) )  ->  R  e.  NN )
2321, 22syl 16 . . . . . 6  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  NN )
2423nncnd 10018 . . . . 5  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  CC )
2520, 24mulcomd 9111 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  ( A  x.  R )  =  ( R  x.  A ) )
2625oveq1d 6098 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  (
( A  x.  R
)  -  1 )  =  ( ( R  x.  A )  - 
1 ) )
2719, 26breqtrd 4238 . 2  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  ||  ( ( R  x.  A )  -  1 ) )
28 elfzelz 11061 . . . 4  |-  ( R  e.  ( 1 ... ( P  -  1 ) )  ->  R  e.  ZZ )
2921, 28syl 16 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  R  e.  ZZ )
3013adantr 453 . . . 4  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  P  e.  NN )
31 fzm1ndvds 12903 . . . 4  |-  ( ( P  e.  NN  /\  R  e.  ( 1 ... ( P  - 
1 ) ) )  ->  -.  P  ||  R
)
3230, 21, 31syl2anc 644 . . 3  |-  ( ( P  e.  Prime  /\  A  e.  ( 1 ... ( P  -  1 ) ) )  ->  -.  P  ||  R )
33 eqid 2438 . . . 4  |-  ( ( R ^ ( P  -  2 ) )  mod  P )  =  ( ( R ^
( P  -  2 ) )  mod  P
)
3433prmdiveq 13177 . . 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 ) ) )
359, 29, 32, 34syl3anc 1185 . 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 ) ) )
368, 27, 35mpbi2and 889 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    <-> wb 178    /\ wa 360    = wceq 1653    e. wcel 1726    C_ wss 3322   class class class wbr 4214  (class class class)co 6083   0cc0 8992   1c1 8993    + caddc 8995    x. cmul 8997    - cmin 9293   NNcn 10002   2c2 10051   ZZcz 10284   ...cfz 11045    mod cmo 11252   ^cexp 11384    || cdivides 12854   Primecprime 13081
This theorem is referenced by:  wilthlem2  20854
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1667  ax-8 1688  ax-13 1728  ax-14 1730  ax-6 1745  ax-7 1750  ax-11 1762  ax-12 1951  ax-ext 2419  ax-rep 4322  ax-sep 4332  ax-nul 4340  ax-pow 4379  ax-pr 4405  ax-un 4703  ax-cnex 9048  ax-resscn 9049  ax-1cn 9050  ax-icn 9051  ax-addcl 9052  ax-addrcl 9053  ax-mulcl 9054  ax-mulrcl 9055  ax-mulcom 9056  ax-addass 9057  ax-mulass 9058  ax-distr 9059  ax-i2m1 9060  ax-1ne0 9061  ax-1rid 9062  ax-rnegex 9063  ax-rrecex 9064  ax-cnre 9065  ax-pre-lttri 9066  ax-pre-lttrn 9067  ax-pre-ltadd 9068  ax-pre-mulgt0 9069  ax-pre-sup 9070
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 938  df-3an 939  df-tru 1329  df-ex 1552  df-nf 1555  df-sb 1660  df-eu 2287  df-mo 2288  df-clab 2425  df-cleq 2431  df-clel 2434  df-nfc 2563  df-ne 2603  df-nel 2604  df-ral 2712  df-rex 2713  df-reu 2714  df-rmo 2715  df-rab 2716  df-v 2960  df-sbc 3164  df-csb 3254  df-dif 3325  df-un 3327  df-in 3329  df-ss 3336  df-pss 3338  df-nul 3631  df-if 3742  df-pw 3803  df-sn 3822  df-pr 3823  df-tp 3824  df-op 3825  df-uni 4018  df-int 4053  df-iun 4097  df-br 4215  df-opab 4269  df-mpt 4270  df-tr 4305  df-eprel 4496  df-id 4500  df-po 4505  df-so 4506  df-fr 4543  df-we 4545  df-ord 4586  df-on 4587  df-lim 4588  df-suc 4589  df-om 4848  df-xp 4886  df-rel 4887  df-cnv 4888  df-co 4889  df-dm 4890  df-rn 4891  df-res 4892  df-ima 4893  df-iota 5420  df-fun 5458  df-fn 5459  df-f 5460  df-f1 5461  df-fo 5462  df-f1o 5463  df-fv 5464  df-ov 6086  df-oprab 6087  df-mpt2 6088  df-1st 6351  df-2nd 6352  df-riota 6551  df-recs 6635  df-rdg 6670  df-1o 6726  df-2o 6727  df-oadd 6730  df-er 6907  df-map 7022  df-en 7112  df-dom 7113  df-sdom 7114  df-fin 7115  df-sup 7448  df-card 7828  df-cda 8050  df-pnf 9124  df-mnf 9125  df-xr 9126  df-ltxr 9127  df-le 9128  df-sub 9295  df-neg 9296  df-div 9680  df-nn 10003  df-2 10060  df-3 10061  df-n0 10224  df-z 10285  df-uz 10491  df-rp 10615  df-fz 11046  df-fzo 11138  df-fl 11204  df-mod 11253  df-seq 11326  df-exp 11385  df-hash 11621  df-cj 11906  df-re 11907  df-im 11908  df-sqr 12042  df-abs 12043  df-dvds 12855  df-gcd 13009  df-prm 13082  df-phi 13157
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