Theorem prmdivdiv 12644

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

Step	Hyp	Ref	Expression
1		fz1ssfz0 10269	. . 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 ) ) )
3	1, 2	sselid 3195	. 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 10206	. . . . . . 7 |- ( A e. ( 1 ... ( P - 1 ) ) -> A e. NN )
6	5	adantl 277	. . . . . 6 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> A e. NN )
7	6	nnzd 9524	. . . . 5 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> A e. ZZ )
8		prmnn 12517	. . . . . 6 |- ( P e. Prime -> P e. NN )
9		fzm1ndvds 12252	. . . . . 6 |- ( ( P e. NN /\ A e. ( 1 ... ( P - 1 ) ) ) -> -. P || A )
10	8, 9	sylan 283	. . . . 5 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> -. P || A )
11		prmdiv.1	. . . . . 6 |- R = ( ( A ^ ( P - 2 ) ) mod P )
12	11	prmdiv 12642	. . . . 5 |- ( ( P e. Prime /\ A e. ZZ /\ -. P || A ) -> ( R e. ( 1 ... ( P - 1 ) ) /\ P || ( ( A x. R ) - 1 ) ) )
13	4, 7, 10, 12	syl3anc 1250	. . . 4 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> ( R e. ( 1 ... ( P - 1 ) ) /\ P || ( ( A x. R ) - 1 ) ) )
14	13	simprd 114	. . 3 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> P || ( ( A x. R ) - 1 ) )
15	6	nncnd 9080	. . . . 5 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> A e. CC )
16	13	simpld 112	. . . . . . 7 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> R e. ( 1 ... ( P - 1 ) ) )
17		elfznn 10206	. . . . . . 7 |- ( R e. ( 1 ... ( P - 1 ) ) -> R e. NN )
18	16, 17	syl 14	. . . . . 6 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> R e. NN )
19	18	nncnd 9080	. . . . 5 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> R e. CC )
20	15, 19	mulcomd 8124	. . . 4 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> ( A x. R ) = ( R x. A ) )
21	20	oveq1d 5977	. . 3 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> ( ( A x. R ) - 1 ) = ( ( R x. A ) - 1 ) )
22	14, 21	breqtrd 4080	. 2 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> P || ( ( R x. A ) - 1 ) )
23		elfzelz 10177	. . . 4 |- ( R e. ( 1 ... ( P - 1 ) ) -> R e. ZZ )
24	16, 23	syl 14	. . 3 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> R e. ZZ )
25		fzm1ndvds 12252	. . . 4 |- ( ( P e. NN /\ R e. ( 1 ... ( P - 1 ) ) ) -> -. P || R )
26	8, 16, 25	syl2an2r 595	. . 3 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> -. P || R )
27		eqid 2206	. . . 4 |- ( ( R ^ ( P - 2 ) ) mod P ) = ( ( R ^ ( P - 2 ) ) mod P )
28	27	prmdiveq 12643	. . 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 ) ) )
29	4, 24, 26, 28	syl3anc 1250	. 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 ) ) )
30	3, 22, 29	mpbi2and 946	1 |- ( ( P e. Prime /\ A e. ( 1 ... ( P - 1 ) ) ) -> A = ( ( R ^ ( P - 2 ) ) mod P ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1373   e. wcel 2177   class class class wbr 4054  (class class class)co 5962   0cc0 7955   1c1 7956   x. cmul 7960   - cmin 8273   NNcn 9066   2c2 9117   ZZcz 9402   ...cfz 10160   mod cmo 10499   ^cexp 10715   || cdvds 12183   Primecprime 12514

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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2179  ax-14 2180  ax-ext 2188  ax-coll 4170  ax-sep 4173  ax-nul 4181  ax-pow 4229  ax-pr 4264  ax-un 4493  ax-setind 4598  ax-iinf 4649  ax-cnex 8046  ax-resscn 8047  ax-1cn 8048  ax-1re 8049  ax-icn 8050  ax-addcl 8051  ax-addrcl 8052  ax-mulcl 8053  ax-mulrcl 8054  ax-addcom 8055  ax-mulcom 8056  ax-addass 8057  ax-mulass 8058  ax-distr 8059  ax-i2m1 8060  ax-0lt1 8061  ax-1rid 8062  ax-0id 8063  ax-rnegex 8064  ax-precex 8065  ax-cnre 8066  ax-pre-ltirr 8067  ax-pre-ltwlin 8068  ax-pre-lttrn 8069  ax-pre-apti 8070  ax-pre-ltadd 8071  ax-pre-mulgt0 8072  ax-pre-mulext 8073  ax-arch 8074  ax-caucvg 8075

This theorem depends on definitions:  df-bi 117  df-stab 833  df-dc 837  df-3or 982  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ne 2378  df-nel 2473  df-ral 2490  df-rex 2491  df-reu 2492  df-rmo 2493  df-rab 2494  df-v 2775  df-sbc 3003  df-csb 3098  df-dif 3172  df-un 3174  df-in 3176  df-ss 3183  df-nul 3465  df-if 3576  df-pw 3623  df-sn 3644  df-pr 3645  df-op 3647  df-uni 3860  df-int 3895  df-iun 3938  df-br 4055  df-opab 4117  df-mpt 4118  df-tr 4154  df-id 4353  df-po 4356  df-iso 4357  df-iord 4426  df-on 4428  df-ilim 4429  df-suc 4431  df-iom 4652  df-xp 4694  df-rel 4695  df-cnv 4696  df-co 4697  df-dm 4698  df-rn 4699  df-res 4700  df-ima 4701  df-iota 5246  df-fun 5287  df-fn 5288  df-f 5289  df-f1 5290  df-fo 5291  df-f1o 5292  df-fv 5293  df-isom 5294  df-riota 5917  df-ov 5965  df-oprab 5966  df-mpo 5967  df-1st 6244  df-2nd 6245  df-recs 6409  df-irdg 6474  df-frec 6495  df-1o 6520  df-2o 6521  df-oadd 6524  df-er 6638  df-en 6846  df-dom 6847  df-fin 6848  df-sup 7107  df-pnf 8139  df-mnf 8140  df-xr 8141  df-ltxr 8142  df-le 8143  df-sub 8275  df-neg 8276  df-reap 8678  df-ap 8685  df-div 8776  df-inn 9067  df-2 9125  df-3 9126  df-4 9127  df-n0 9326  df-z 9403  df-uz 9679  df-q 9771  df-rp 9806  df-fz 10161  df-fzo 10295  df-fl 10445  df-mod 10500  df-seqfrec 10625  df-exp 10716  df-ihash 10953  df-cj 11238  df-re 11239  df-im 11240  df-rsqrt 11394  df-abs 11395  df-clim 11675  df-proddc 11947  df-dvds 12184  df-gcd 12360  df-prm 12515  df-phi 12618

This theorem is referenced by: (None)