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Theorem lgsqrlem3 26840

Description: Lemma for lgsqr 26843. (Contributed by Mario Carneiro, 15-Jun-2015.)

**Hypotheses**
Ref	Expression
lgsqr.y	⊢ 𝑌 = (ℤ/nℤ‘𝑃)
lgsqr.s	⊢ 𝑆 = (Poly₁‘𝑌)
lgsqr.b	⊢ 𝐵 = (Base‘𝑆)
lgsqr.d	⊢ 𝐷 = ( deg₁ ‘𝑌)
lgsqr.o	⊢ 𝑂 = (eval₁‘𝑌)
lgsqr.e	⊢ ↑ = (._g‘(mulGrp‘𝑆))
lgsqr.x	⊢ 𝑋 = (var₁‘𝑌)
lgsqr.m	⊢ − = (-_g‘𝑆)
lgsqr.u	⊢ 1 = (1_r‘𝑆)
lgsqr.t	⊢ 𝑇 = ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 )
lgsqr.l	⊢ 𝐿 = (ℤRHom‘𝑌)
lgsqr.1	⊢ (𝜑 → 𝑃 ∈ (ℙ ∖ {2}))
lgsqr.g	⊢ 𝐺 = (𝑦 ∈ (1...((𝑃 − 1) / 2)) ↦ (𝐿‘(𝑦↑2)))
lgsqr.3	⊢ (𝜑 → 𝐴 ∈ ℤ)
lgsqr.4	⊢ (𝜑 → (𝐴 /_L 𝑃) = 1)

**Assertion**
Ref	Expression
lgsqrlem3	⊢ (𝜑 → (𝐿‘𝐴) ∈ (^◡(𝑂‘𝑇) “ {(0_g‘𝑌)}))

Distinct variable groups: 𝑦,𝑂 𝑦,𝑃 𝜑,𝑦 𝑦,𝑇 𝑦,𝐿 𝑦,𝑌 Allowed substitution hints: 𝐴(𝑦) 𝐵(𝑦) 𝐷(𝑦) 𝑆(𝑦) 1 (𝑦) ↑ (𝑦) 𝐺(𝑦) − (𝑦) 𝑋(𝑦)

**Proof of Theorem lgsqrlem3**
Step	Hyp	Ref	Expression
1		lgsqr.1	. . . . . . . . . 10 ⊢ (𝜑 → 𝑃 ∈ (ℙ ∖ {2}))
2	1	eldifad 3959	. . . . . . . . 9 ⊢ (𝜑 → 𝑃 ∈ ℙ)
3		lgsqr.y	. . . . . . . . . 10 ⊢ 𝑌 = (ℤ/nℤ‘𝑃)
4	3	znfld 21107	. . . . . . . . 9 ⊢ (𝑃 ∈ ℙ → 𝑌 ∈ Field)
5	2, 4	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑌 ∈ Field)
6		fldidom 20915	. . . . . . . 8 ⊢ (𝑌 ∈ Field → 𝑌 ∈ IDomn)
7	5, 6	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ IDomn)
8		isidom 20914	. . . . . . . 8 ⊢ (𝑌 ∈ IDomn ↔ (𝑌 ∈ CRing ∧ 𝑌 ∈ Domn))
9	8	simplbi 498	. . . . . . 7 ⊢ (𝑌 ∈ IDomn → 𝑌 ∈ CRing)
10	7, 9	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ CRing)
11		crngring 20061	. . . . . 6 ⊢ (𝑌 ∈ CRing → 𝑌 ∈ Ring)
12	10, 11	syl 17	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ Ring)
13		lgsqr.l	. . . . . 6 ⊢ 𝐿 = (ℤRHom‘𝑌)
14	13	zrhrhm 21052	. . . . 5 ⊢ (𝑌 ∈ Ring → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
15	12, 14	syl 17	. . . 4 ⊢ (𝜑 → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
16		zringbas 21015	. . . . 5 ⊢ ℤ = (Base‘ℤ_ring)
17		eqid 2732	. . . . 5 ⊢ (Base‘𝑌) = (Base‘𝑌)
18	16, 17	rhmf 20255	. . . 4 ⊢ (𝐿 ∈ (ℤ_ring RingHom 𝑌) → 𝐿:ℤ⟶(Base‘𝑌))
19	15, 18	syl 17	. . 3 ⊢ (𝜑 → 𝐿:ℤ⟶(Base‘𝑌))
20		lgsqr.3	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℤ)
21	19, 20	ffvelcdmd 7084	. 2 ⊢ (𝜑 → (𝐿‘𝐴) ∈ (Base‘𝑌))
22		lgsqr.s	. . 3 ⊢ 𝑆 = (Poly₁‘𝑌)
23		lgsqr.b	. . 3 ⊢ 𝐵 = (Base‘𝑆)
24		lgsqr.d	. . 3 ⊢ 𝐷 = ( deg₁ ‘𝑌)
25		lgsqr.o	. . 3 ⊢ 𝑂 = (eval₁‘𝑌)
26		lgsqr.e	. . 3 ⊢ ↑ = (._g‘(mulGrp‘𝑆))
27		lgsqr.x	. . 3 ⊢ 𝑋 = (var₁‘𝑌)
28		lgsqr.m	. . 3 ⊢ − = (-_g‘𝑆)
29		lgsqr.u	. . 3 ⊢ 1 = (1_r‘𝑆)
30		lgsqr.t	. . 3 ⊢ 𝑇 = ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 )
31		lgsvalmod 26808	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2})) → ((𝐴 /_L 𝑃) mod 𝑃) = ((𝐴↑((𝑃 − 1) / 2)) mod 𝑃))
32	20, 1, 31	syl2anc 584	. . . 4 ⊢ (𝜑 → ((𝐴 /_L 𝑃) mod 𝑃) = ((𝐴↑((𝑃 − 1) / 2)) mod 𝑃))
33		lgsqr.4	. . . . 5 ⊢ (𝜑 → (𝐴 /_L 𝑃) = 1)
34	33	oveq1d 7420	. . . 4 ⊢ (𝜑 → ((𝐴 /_L 𝑃) mod 𝑃) = (1 mod 𝑃))
35	32, 34	eqtr3d 2774	. . 3 ⊢ (𝜑 → ((𝐴↑((𝑃 − 1) / 2)) mod 𝑃) = (1 mod 𝑃))
36	3, 22, 23, 24, 25, 26, 27, 28, 29, 30, 13, 1, 20, 35	lgsqrlem1 26838	. 2 ⊢ (𝜑 → ((𝑂‘𝑇)‘(𝐿‘𝐴)) = (0_g‘𝑌))
37		eqid 2732	. . . . 5 ⊢ (𝑌 ↑_s (Base‘𝑌)) = (𝑌 ↑_s (Base‘𝑌))
38		eqid 2732	. . . . 5 ⊢ (Base‘(𝑌 ↑_s (Base‘𝑌))) = (Base‘(𝑌 ↑_s (Base‘𝑌)))
39		fvexd 6903	. . . . 5 ⊢ (𝜑 → (Base‘𝑌) ∈ V)
40	25, 22, 37, 17	evl1rhm 21842	. . . . . . . 8 ⊢ (𝑌 ∈ CRing → 𝑂 ∈ (𝑆 RingHom (𝑌 ↑_s (Base‘𝑌))))
41	10, 40	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑂 ∈ (𝑆 RingHom (𝑌 ↑_s (Base‘𝑌))))
42	23, 38	rhmf 20255	. . . . . . 7 ⊢ (𝑂 ∈ (𝑆 RingHom (𝑌 ↑_s (Base‘𝑌))) → 𝑂:𝐵⟶(Base‘(𝑌 ↑_s (Base‘𝑌))))
43	41, 42	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑂:𝐵⟶(Base‘(𝑌 ↑_s (Base‘𝑌))))
44	22	ply1ring 21761	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑆 ∈ Ring)
45	12, 44	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑆 ∈ Ring)
46		ringgrp 20054	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 𝑆 ∈ Grp)
47	45, 46	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑆 ∈ Grp)
48		eqid 2732	. . . . . . . . . 10 ⊢ (mulGrp‘𝑆) = (mulGrp‘𝑆)
49	48, 23	mgpbas 19987	. . . . . . . . 9 ⊢ 𝐵 = (Base‘(mulGrp‘𝑆))
50	48	ringmgp 20055	. . . . . . . . . 10 ⊢ (𝑆 ∈ Ring → (mulGrp‘𝑆) ∈ Mnd)
51	45, 50	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (mulGrp‘𝑆) ∈ Mnd)
52		oddprm 16739	. . . . . . . . . . 11 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((𝑃 − 1) / 2) ∈ ℕ)
53	1, 52	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ)
54	53	nnnn0d 12528	. . . . . . . . 9 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ₀)
55	27, 22, 23	vr1cl 21732	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑋 ∈ 𝐵)
56	12, 55	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
57	49, 26, 51, 54, 56	mulgnn0cld 18969	. . . . . . . 8 ⊢ (𝜑 → (((𝑃 − 1) / 2) ↑ 𝑋) ∈ 𝐵)
58	23, 29	ringidcl 20076	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 1 ∈ 𝐵)
59	45, 58	syl 17	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ 𝐵)
60	23, 28	grpsubcl 18899	. . . . . . . 8 ⊢ ((𝑆 ∈ Grp ∧ (((𝑃 − 1) / 2) ↑ 𝑋) ∈ 𝐵 ∧ 1 ∈ 𝐵) → ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 ) ∈ 𝐵)
61	47, 57, 59, 60	syl3anc 1371	. . . . . . 7 ⊢ (𝜑 → ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 ) ∈ 𝐵)
62	30, 61	eqeltrid 2837	. . . . . 6 ⊢ (𝜑 → 𝑇 ∈ 𝐵)
63	43, 62	ffvelcdmd 7084	. . . . 5 ⊢ (𝜑 → (𝑂‘𝑇) ∈ (Base‘(𝑌 ↑_s (Base‘𝑌))))
64	37, 17, 38, 5, 39, 63	pwselbas 17431	. . . 4 ⊢ (𝜑 → (𝑂‘𝑇):(Base‘𝑌)⟶(Base‘𝑌))
65	64	ffnd 6715	. . 3 ⊢ (𝜑 → (𝑂‘𝑇) Fn (Base‘𝑌))
66		fniniseg 7058	. . 3 ⊢ ((𝑂‘𝑇) Fn (Base‘𝑌) → ((𝐿‘𝐴) ∈ (^◡(𝑂‘𝑇) “ {(0_g‘𝑌)}) ↔ ((𝐿‘𝐴) ∈ (Base‘𝑌) ∧ ((𝑂‘𝑇)‘(𝐿‘𝐴)) = (0_g‘𝑌))))
67	65, 66	syl 17	. 2 ⊢ (𝜑 → ((𝐿‘𝐴) ∈ (^◡(𝑂‘𝑇) “ {(0_g‘𝑌)}) ↔ ((𝐿‘𝐴) ∈ (Base‘𝑌) ∧ ((𝑂‘𝑇)‘(𝐿‘𝐴)) = (0_g‘𝑌))))
68	21, 36, 67	mpbir2and 711	1 ⊢ (𝜑 → (𝐿‘𝐴) ∈ (^◡(𝑂‘𝑇) “ {(0_g‘𝑌)}))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 Vcvv 3474 ∖ cdif 3944 {csn 4627 ↦ cmpt 5230 ^◡ccnv 5674 “ cima 5678 Fn wfn 6535 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 1c1 11107 − cmin 11440 / cdiv 11867 ℕcn 12208 2c2 12263 ℤcz 12554 ...cfz 13480 mod cmo 13830 ↑cexp 14023 ℙcprime 16604 Basecbs 17140 0_gc0g 17381 ↑_s cpws 17388 Mndcmnd 18621 Grpcgrp 18815 -_gcsg 18817 ._gcmg 18944 mulGrpcmgp 19981 1_rcur 19998 Ringcrg 20049 CRingccrg 20050 RingHom crh 20240 Fieldcfield 20308 Domncdomn 20888 IDomncidom 20889 ℤ_ringczring 21009 ℤRHomczrh 21040 ℤ/nℤczn 21043 var₁cv1 21691 Poly₁cpl1 21692 eval₁ce1 21824 deg₁ cdg1 25560 /_L clgs 26786

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-ofr 7667 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-tpos 8207 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-oadd 8466 df-er 8699 df-ec 8701 df-qs 8705 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-sup 9433 df-inf 9434 df-oi 9501 df-dju 9892 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-xnn0 12541 df-z 12555 df-dec 12674 df-uz 12819 df-q 12929 df-rp 12971 df-fz 13481 df-fzo 13624 df-fl 13753 df-mod 13831 df-seq 13963 df-exp 14024 df-hash 14287 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-dvds 16194 df-gcd 16432 df-prm 16605 df-phi 16695 df-pc 16766 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-hom 17217 df-cco 17218 df-0g 17383 df-gsum 17384 df-prds 17389 df-pws 17391 df-imas 17450 df-qus 17451 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-submnd 18668 df-grp 18818 df-minusg 18819 df-sbg 18820 df-mulg 18945 df-subg 18997 df-nsg 18998 df-eqg 18999 df-ghm 19084 df-cntz 19175 df-cmn 19644 df-abl 19645 df-mgp 19982 df-ur 19999 df-srg 20003 df-ring 20051 df-cring 20052 df-oppr 20142 df-dvdsr 20163 df-unit 20164 df-invr 20194 df-dvr 20207 df-rnghom 20243 df-nzr 20284 df-drng 20309 df-field 20310 df-subrg 20353 df-lmod 20465 df-lss 20535 df-lsp 20575 df-sra 20777 df-rgmod 20778 df-lidl 20779 df-rsp 20780 df-2idl 20849 df-rlreg 20891 df-domn 20892 df-idom 20893 df-cnfld 20937 df-zring 21010 df-zrh 21044 df-zn 21047 df-assa 21399 df-asp 21400 df-ascl 21401 df-psr 21453 df-mvr 21454 df-mpl 21455 df-opsr 21457 df-evls 21626 df-evl 21627 df-psr1 21695 df-vr1 21696 df-ply1 21697 df-evl1 21826 df-lgs 26787

This theorem is referenced by: lgsqrlem4 26841

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