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Theorem lgsqrlem3 27236

Description: Lemma for lgsqr 27239. (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 3955	. . . . . . . . 9 ⊢ (𝜑 → 𝑃 ∈ ℙ)
3		lgsqr.y	. . . . . . . . . 10 ⊢ 𝑌 = (ℤ/nℤ‘𝑃)
4	3	znfld 21455	. . . . . . . . 9 ⊢ (𝑃 ∈ ℙ → 𝑌 ∈ Field)
5	2, 4	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑌 ∈ Field)
6		fldidom 21219	. . . . . . . 8 ⊢ (𝑌 ∈ Field → 𝑌 ∈ IDomn)
7	5, 6	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ IDomn)
8		isidom 21216	. . . . . . . 8 ⊢ (𝑌 ∈ IDomn ↔ (𝑌 ∈ CRing ∧ 𝑌 ∈ Domn))
9	8	simplbi 497	. . . . . . 7 ⊢ (𝑌 ∈ IDomn → 𝑌 ∈ CRing)
10	7, 9	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑌 ∈ CRing)
11		crngring 20150	. . . . . 6 ⊢ (𝑌 ∈ CRing → 𝑌 ∈ Ring)
12	10, 11	syl 17	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ Ring)
13		lgsqr.l	. . . . . 6 ⊢ 𝐿 = (ℤRHom‘𝑌)
14	13	zrhrhm 21398	. . . . 5 ⊢ (𝑌 ∈ Ring → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
15	12, 14	syl 17	. . . 4 ⊢ (𝜑 → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
16		zringbas 21340	. . . . 5 ⊢ ℤ = (Base‘ℤ_ring)
17		eqid 2726	. . . . 5 ⊢ (Base‘𝑌) = (Base‘𝑌)
18	16, 17	rhmf 20387	. . . 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 7081	. 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 27204	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2})) → ((𝐴 /_L 𝑃) mod 𝑃) = ((𝐴↑((𝑃 − 1) / 2)) mod 𝑃))
32	20, 1, 31	syl2anc 583	. . . 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 2768	. . 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 27234	. 2 ⊢ (𝜑 → ((𝑂‘𝑇)‘(𝐿‘𝐴)) = (0_g‘𝑌))
37		eqid 2726	. . . . 5 ⊢ (𝑌 ↑_s (Base‘𝑌)) = (𝑌 ↑_s (Base‘𝑌))
38		eqid 2726	. . . . 5 ⊢ (Base‘(𝑌 ↑_s (Base‘𝑌))) = (Base‘(𝑌 ↑_s (Base‘𝑌)))
39		fvexd 6900	. . . . 5 ⊢ (𝜑 → (Base‘𝑌) ∈ V)
40	25, 22, 37, 17	evl1rhm 22206	. . . . . . . 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 20387	. . . . . . 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 22121	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑆 ∈ Ring)
45	12, 44	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑆 ∈ Ring)
46		ringgrp 20143	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 𝑆 ∈ Grp)
47	45, 46	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑆 ∈ Grp)
48		eqid 2726	. . . . . . . . . 10 ⊢ (mulGrp‘𝑆) = (mulGrp‘𝑆)
49	48, 23	mgpbas 20045	. . . . . . . . 9 ⊢ 𝐵 = (Base‘(mulGrp‘𝑆))
50	48	ringmgp 20144	. . . . . . . . . 10 ⊢ (𝑆 ∈ Ring → (mulGrp‘𝑆) ∈ Mnd)
51	45, 50	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (mulGrp‘𝑆) ∈ Mnd)
52		oddprm 16752	. . . . . . . . . . 11 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((𝑃 − 1) / 2) ∈ ℕ)
53	1, 52	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ)
54	53	nnnn0d 12536	. . . . . . . . 9 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ₀)
55	27, 22, 23	vr1cl 22091	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑋 ∈ 𝐵)
56	12, 55	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
57	49, 26, 51, 54, 56	mulgnn0cld 19022	. . . . . . . 8 ⊢ (𝜑 → (((𝑃 − 1) / 2) ↑ 𝑋) ∈ 𝐵)
58	23, 29	ringidcl 20165	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 1 ∈ 𝐵)
59	45, 58	syl 17	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ 𝐵)
60	23, 28	grpsubcl 18948	. . . . . . . 8 ⊢ ((𝑆 ∈ Grp ∧ (((𝑃 − 1) / 2) ↑ 𝑋) ∈ 𝐵 ∧ 1 ∈ 𝐵) → ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 ) ∈ 𝐵)
61	47, 57, 59, 60	syl3anc 1368	. . . . . . 7 ⊢ (𝜑 → ((((𝑃 − 1) / 2) ↑ 𝑋) − 1 ) ∈ 𝐵)
62	30, 61	eqeltrid 2831	. . . . . 6 ⊢ (𝜑 → 𝑇 ∈ 𝐵)
63	43, 62	ffvelcdmd 7081	. . . . 5 ⊢ (𝜑 → (𝑂‘𝑇) ∈ (Base‘(𝑌 ↑_s (Base‘𝑌))))
64	37, 17, 38, 5, 39, 63	pwselbas 17444	. . . 4 ⊢ (𝜑 → (𝑂‘𝑇):(Base‘𝑌)⟶(Base‘𝑌))
65	64	ffnd 6712	. . 3 ⊢ (𝜑 → (𝑂‘𝑇) Fn (Base‘𝑌))
66		fniniseg 7055	. . 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 710	1 ⊢ (𝜑 → (𝐿‘𝐴) ∈ (^◡(𝑂‘𝑇) “ {(0_g‘𝑌)}))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1533 ∈ wcel 2098 Vcvv 3468 ∖ cdif 3940 {csn 4623 ↦ cmpt 5224 ^◡ccnv 5668 “ cima 5672 Fn wfn 6532 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 1c1 11113 − cmin 11448 / cdiv 11875 ℕcn 12216 2c2 12271 ℤcz 12562 ...cfz 13490 mod cmo 13840 ↑cexp 14032 ℙcprime 16615 Basecbs 17153 0_gc0g 17394 ↑_s cpws 17401 Mndcmnd 18667 Grpcgrp 18863 -_gcsg 18865 ._gcmg 18995 mulGrpcmgp 20039 1_rcur 20086 Ringcrg 20138 CRingccrg 20139 RingHom crh 20371 Fieldcfield 20588 Domncdomn 21190 IDomncidom 21191 ℤ_ringczring 21333 ℤRHomczrh 21386 ℤ/nℤczn 21389 var₁cv1 22050 Poly₁cpl1 22051 eval₁ce1 22188 deg₁ cdg1 25942 /_L clgs 27182

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191 ax-mulf 11192

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7667 df-ofr 7668 df-om 7853 df-1st 7974 df-2nd 7975 df-supp 8147 df-tpos 8212 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-2o 8468 df-oadd 8471 df-er 8705 df-ec 8707 df-qs 8711 df-map 8824 df-pm 8825 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-sup 9439 df-inf 9440 df-oi 9507 df-dju 9898 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-xnn0 12549 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12981 df-fz 13491 df-fzo 13634 df-fl 13763 df-mod 13841 df-seq 13973 df-exp 14033 df-hash 14296 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-dvds 16205 df-gcd 16443 df-prm 16616 df-phi 16708 df-pc 16779 df-struct 17089 df-sets 17106 df-slot 17124 df-ndx 17136 df-base 17154 df-ress 17183 df-plusg 17219 df-mulr 17220 df-starv 17221 df-sca 17222 df-vsca 17223 df-ip 17224 df-tset 17225 df-ple 17226 df-ds 17228 df-unif 17229 df-hom 17230 df-cco 17231 df-0g 17396 df-gsum 17397 df-prds 17402 df-pws 17404 df-imas 17463 df-qus 17464 df-mre 17539 df-mrc 17540 df-acs 17542 df-mgm 18573 df-sgrp 18652 df-mnd 18668 df-mhm 18713 df-submnd 18714 df-grp 18866 df-minusg 18867 df-sbg 18868 df-mulg 18996 df-subg 19050 df-nsg 19051 df-eqg 19052 df-ghm 19139 df-cntz 19233 df-cmn 19702 df-abl 19703 df-mgp 20040 df-rng 20058 df-ur 20087 df-srg 20092 df-ring 20140 df-cring 20141 df-oppr 20236 df-dvdsr 20259 df-unit 20260 df-invr 20290 df-dvr 20303 df-rhm 20374 df-nzr 20415 df-subrng 20446 df-subrg 20471 df-drng 20589 df-field 20590 df-lmod 20708 df-lss 20779 df-lsp 20819 df-sra 21021 df-rgmod 21022 df-lidl 21067 df-rsp 21068 df-2idl 21107 df-rlreg 21193 df-domn 21194 df-idom 21195 df-cnfld 21241 df-zring 21334 df-zrh 21390 df-zn 21393 df-assa 21748 df-asp 21749 df-ascl 21750 df-psr 21803 df-mvr 21804 df-mpl 21805 df-opsr 21807 df-evls 21977 df-evl 21978 df-psr1 22054 df-vr1 22055 df-ply1 22056 df-evl1 22190 df-lgs 27183

This theorem is referenced by: lgsqrlem4 27237

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