Theorem 2lgslem1 15951

Description: Lemma 1 for 2lgs 15964. (Contributed by AV, 19-Jun-2021.)

Assertion

Ref	Expression
2lgslem1	|- ( ( P e. Prime /\ -. 2 || P ) -> (♯ ` { x e. ZZ | E. i e. ( 1 ... ( ( P - 1 ) / 2 ) ) ( x = ( i x. 2 ) /\ ( P / 2 ) < ( x mod P ) ) } ) = ( ( ( P - 1 ) / 2 ) - ( |_ ` ( P / 4 ) ) ) )

Distinct variable group:   P, i, x

Proof of Theorem 2lgslem1

Dummy variables f y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		2lgslem1a 15948	. . 3 |- ( ( P e. Prime /\ -. 2 || P ) -> { x e. ZZ | E. i e. ( 1 ... ( ( P - 1 ) / 2 ) ) ( x = ( i x. 2 ) /\ ( P / 2 ) < ( x mod P ) ) } = { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } )
2	1	fveq2d 5673	. 2 |- ( ( P e. Prime /\ -. 2 || P ) -> (♯ ` { x e. ZZ | E. i e. ( 1 ... ( ( P - 1 ) / 2 ) ) ( x = ( i x. 2 ) /\ ( P / 2 ) < ( x mod P ) ) } ) = (♯ ` { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) )
3		prmz 12801	. . . . . . . 8 |- ( P e. Prime -> P e. ZZ )
4		4nn 9397	. . . . . . . 8 |- 4 e. NN
5		znq 9952	. . . . . . . 8 |- ( ( P e. ZZ /\ 4 e. NN ) -> ( P / 4 ) e. QQ )
6	3, 4, 5	sylancl 413	. . . . . . 7 |- ( P e. Prime -> ( P / 4 ) e. QQ )
7	6	adantr 276	. . . . . 6 |- ( ( P e. Prime /\ -. 2 || P ) -> ( P / 4 ) e. QQ )
8	7	flqcld 10633	. . . . 5 |- ( ( P e. Prime /\ -. 2 || P ) -> ( |_ ` ( P / 4 ) ) e. ZZ )
9	8	peano2zd 9699	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( |_ ` ( P / 4 ) ) + 1 ) e. ZZ )
10		nnoddn2prmb 12953	. . . . . 6 |- ( P e. ( Prime \ { 2 } ) <-> ( P e. Prime /\ -. 2 || P ) )
11		oddprm 12950	. . . . . 6 |- ( P e. ( Prime \ { 2 } ) -> ( ( P - 1 ) / 2 ) e. NN )
12	10, 11	sylbir 135	. . . . 5 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( P - 1 ) / 2 ) e. NN )
13	12	nnzd 9695	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( P - 1 ) / 2 ) e. ZZ )
14	9, 13	fzfigd 10789	. . 3 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) e. Fin )
15	14	mptexd 5912	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) e. _V )
16		eqid 2232	. . . . 5 |- ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) = ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) )
17		eqid 2232	. . . . 5 |- ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) = ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) )
18	16, 17	2lgslem1b 15949	. . . 4 |- ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) }
19		f1oeq1 5601	. . . . 5 |- ( f = ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) -> ( f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } <-> ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) )
20	19	spcegv 2904	. . . 4 |- ( ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) e. _V -> ( ( y e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) |-> ( y x. 2 ) ) : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } -> E. f f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) )
21	15, 18, 20	mpisyl 1492	. . 3 |- ( ( P e. Prime /\ -. 2 || P ) -> E. f f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } )
22		fihasheqf1oi 11145	. . . . 5 |- ( ( ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) e. Fin /\ f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = (♯ ` { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) )
23	22	ex 115	. . . 4 |- ( ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) e. Fin -> ( f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = (♯ ` { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) ) )
24	23	exlimdv 1868	. . 3 |- ( ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) e. Fin -> ( E. f f : ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) -1-1-onto-> { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = (♯ ` { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) ) )
25	14, 21, 24	sylc 62	. 2 |- ( ( P e. Prime /\ -. 2 || P ) -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = (♯ ` { x e. ZZ | E. i e. ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) x = ( i x. 2 ) } ) )
26	6	flqcld 10633	. . . . 5 |- ( P e. Prime -> ( |_ ` ( P / 4 ) ) e. ZZ )
27	26	adantr 276	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( |_ ` ( P / 4 ) ) e. ZZ )
28		oddm1d2 12571	. . . . . 6 |- ( P e. ZZ -> ( -. 2 || P <-> ( ( P - 1 ) / 2 ) e. ZZ ) )
29	3, 28	syl 14	. . . . 5 |- ( P e. Prime -> ( -. 2 || P <-> ( ( P - 1 ) / 2 ) e. ZZ ) )
30	29	biimpa 296	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( P - 1 ) / 2 ) e. ZZ )
31		2lgslem1c 15950	. . . 4 |- ( ( P e. Prime /\ -. 2 || P ) -> ( |_ ` ( P / 4 ) ) <_ ( ( P - 1 ) / 2 ) )
32		eluz2 9855	. . . 4 |- ( ( ( P - 1 ) / 2 ) e. ( ZZ>= ` ( |_ ` ( P / 4 ) ) ) <-> ( ( |_ ` ( P / 4 ) ) e. ZZ /\ ( ( P - 1 ) / 2 ) e. ZZ /\ ( |_ ` ( P / 4 ) ) <_ ( ( P - 1 ) / 2 ) ) )
33	27, 30, 31, 32	syl3anbrc 1208	. . 3 |- ( ( P e. Prime /\ -. 2 || P ) -> ( ( P - 1 ) / 2 ) e. ( ZZ>= ` ( |_ ` ( P / 4 ) ) ) )
34		hashfzp1 11184	. . 3 |- ( ( ( P - 1 ) / 2 ) e. ( ZZ>= ` ( |_ ` ( P / 4 ) ) ) -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = ( ( ( P - 1 ) / 2 ) - ( |_ ` ( P / 4 ) ) ) )
35	33, 34	syl 14	. 2 |- ( ( P e. Prime /\ -. 2 || P ) -> (♯ ` ( ( ( |_ ` ( P / 4 ) ) + 1 ) ... ( ( P - 1 ) / 2 ) ) ) = ( ( ( P - 1 ) / 2 ) - ( |_ ` ( P / 4 ) ) ) )
36	2, 25, 35	3eqtr2d 2271	1 |- ( ( P e. Prime /\ -. 2 || P ) -> (♯ ` { x e. ZZ | E. i e. ( 1 ... ( ( P - 1 ) / 2 ) ) ( x = ( i x. 2 ) /\ ( P / 2 ) < ( x mod P ) ) } ) = ( ( ( P - 1 ) / 2 ) - ( |_ ` ( P / 4 ) ) ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1398   E.wex 1541   e. wcel 2203   E.wrex 2521   {crab 2524   _Vcvv 2812   \ cdif 3207   {csn 3688   class class class wbr 4108   |-> cmpt 4170   -1-1-onto->wf1o 5350   ` cfv 5351  (class class class)co 6049   Fincfn 6974   1c1 8124   + caddc 8126   x. cmul 8128   < clt 8304   <_ cle 8305   - cmin 8440   / cdiv 8942   NNcn 9233   2c2 9284   4c4 9286   ZZcz 9573   ZZ>=cuz 9849   QQcq 9947   ...cfz 10338   |_cfl 10624   mod cmo 10680  ♯chash 11133   || cdvds 12466   Primecprime 12797

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709  ax-cnex 8214  ax-resscn 8215  ax-1cn 8216  ax-1re 8217  ax-icn 8218  ax-addcl 8219  ax-addrcl 8220  ax-mulcl 8221  ax-mulrcl 8222  ax-addcom 8223  ax-mulcom 8224  ax-addass 8225  ax-mulass 8226  ax-distr 8227  ax-i2m1 8228  ax-0lt1 8229  ax-1rid 8230  ax-0id 8231  ax-rnegex 8232  ax-precex 8233  ax-cnre 8234  ax-pre-ltirr 8235  ax-pre-ltwlin 8236  ax-pre-lttrn 8237  ax-pre-apti 8238  ax-pre-ltadd 8239  ax-pre-mulgt0 8240  ax-pre-mulext 8241  ax-arch 8242  ax-caucvg 8243

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-xor 1421  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-if 3620  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-po 4416  df-iso 4417  df-iord 4486  df-on 4488  df-ilim 4489  df-suc 4491  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-1st 6333  df-2nd 6334  df-recs 6535  df-frec 6621  df-1o 6646  df-2o 6647  df-er 6766  df-en 6975  df-dom 6976  df-fin 6977  df-pnf 8306  df-mnf 8307  df-xr 8308  df-ltxr 8309  df-le 8310  df-sub 8442  df-neg 8443  df-reap 8845  df-ap 8852  df-div 8943  df-inn 9234  df-2 9292  df-3 9293  df-4 9294  df-n0 9493  df-z 9574  df-uz 9850  df-q 9948  df-rp 9983  df-fz 10339  df-fl 10626  df-mod 10681  df-seqfrec 10806  df-exp 10897  df-ihash 11134  df-cj 11520  df-re 11521  df-im 11522  df-rsqrt 11676  df-abs 11677  df-dvds 12467  df-prm 12798

This theorem is referenced by:  2lgs  15964