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Theorem lgsqrlem3 26696

Description: Lemma for lgsqr 26699. (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 3922	. . . . . . . . 9 ⊢ (𝜑 → 𝑃 ∈ ℙ)
3		lgsqr.y	. . . . . . . . . 10 ⊢ 𝑌 = (ℤ/nℤ‘𝑃)
4	3	znfld 20967	. . . . . . . . 9 ⊢ (𝑃 ∈ ℙ → 𝑌 ∈ Field)
5	2, 4	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑌 ∈ Field)
6		fldidom 20775	. . . . . . . 8 ⊢ (𝑌 ∈ Field → 𝑌 ∈ IDomn)
7	5, 6	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ IDomn)
8		isidom 20774	. . . . . . . 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 19976	. . . . . 6 ⊢ (𝑌 ∈ CRing → 𝑌 ∈ Ring)
12	10, 11	syl 17	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ Ring)
13		lgsqr.l	. . . . . 6 ⊢ 𝐿 = (ℤRHom‘𝑌)
14	13	zrhrhm 20912	. . . . 5 ⊢ (𝑌 ∈ Ring → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
15	12, 14	syl 17	. . . 4 ⊢ (𝜑 → 𝐿 ∈ (ℤ_ring RingHom 𝑌))
16		zringbas 20875	. . . . 5 ⊢ ℤ = (Base‘ℤ_ring)
17		eqid 2736	. . . . 5 ⊢ (Base‘𝑌) = (Base‘𝑌)
18	16, 17	rhmf 20158	. . . 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 7036	. 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 26664	. . . . 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 7372	. . . 4 ⊢ (𝜑 → ((𝐴 /_L 𝑃) mod 𝑃) = (1 mod 𝑃))
35	32, 34	eqtr3d 2778	. . 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 26694	. 2 ⊢ (𝜑 → ((𝑂‘𝑇)‘(𝐿‘𝐴)) = (0_g‘𝑌))
37		eqid 2736	. . . . 5 ⊢ (𝑌 ↑_s (Base‘𝑌)) = (𝑌 ↑_s (Base‘𝑌))
38		eqid 2736	. . . . 5 ⊢ (Base‘(𝑌 ↑_s (Base‘𝑌))) = (Base‘(𝑌 ↑_s (Base‘𝑌)))
39		fvexd 6857	. . . . 5 ⊢ (𝜑 → (Base‘𝑌) ∈ V)
40	25, 22, 37, 17	evl1rhm 21698	. . . . . . . 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 20158	. . . . . . 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 21619	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑆 ∈ Ring)
45	12, 44	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑆 ∈ Ring)
46		ringgrp 19969	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 𝑆 ∈ Grp)
47	45, 46	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑆 ∈ Grp)
48		eqid 2736	. . . . . . . . . 10 ⊢ (mulGrp‘𝑆) = (mulGrp‘𝑆)
49	48, 23	mgpbas 19902	. . . . . . . . 9 ⊢ 𝐵 = (Base‘(mulGrp‘𝑆))
50	48	ringmgp 19970	. . . . . . . . . 10 ⊢ (𝑆 ∈ Ring → (mulGrp‘𝑆) ∈ Mnd)
51	45, 50	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (mulGrp‘𝑆) ∈ Mnd)
52		oddprm 16682	. . . . . . . . . . 11 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((𝑃 − 1) / 2) ∈ ℕ)
53	1, 52	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ)
54	53	nnnn0d 12473	. . . . . . . . 9 ⊢ (𝜑 → ((𝑃 − 1) / 2) ∈ ℕ₀)
55	27, 22, 23	vr1cl 21588	. . . . . . . . . 10 ⊢ (𝑌 ∈ Ring → 𝑋 ∈ 𝐵)
56	12, 55	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
57	49, 26, 51, 54, 56	mulgnn0cld 18897	. . . . . . . 8 ⊢ (𝜑 → (((𝑃 − 1) / 2) ↑ 𝑋) ∈ 𝐵)
58	23, 29	ringidcl 19989	. . . . . . . . 9 ⊢ (𝑆 ∈ Ring → 1 ∈ 𝐵)
59	45, 58	syl 17	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ 𝐵)
60	23, 28	grpsubcl 18827	. . . . . . . 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 2842	. . . . . 6 ⊢ (𝜑 → 𝑇 ∈ 𝐵)
63	43, 62	ffvelcdmd 7036	. . . . 5 ⊢ (𝜑 → (𝑂‘𝑇) ∈ (Base‘(𝑌 ↑_s (Base‘𝑌))))
64	37, 17, 38, 5, 39, 63	pwselbas 17371	. . . 4 ⊢ (𝜑 → (𝑂‘𝑇):(Base‘𝑌)⟶(Base‘𝑌))
65	64	ffnd 6669	. . 3 ⊢ (𝜑 → (𝑂‘𝑇) Fn (Base‘𝑌))
66		fniniseg 7010	. . 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 3445 ∖ cdif 3907 {csn 4586 ↦ cmpt 5188 ^◡ccnv 5632 “ cima 5636 Fn wfn 6491 ⟶wf 6492 ‘cfv 6496 (class class class)co 7357 1c1 11052 − cmin 11385 / cdiv 11812 ℕcn 12153 2c2 12208 ℤcz 12499 ...cfz 13424 mod cmo 13774 ↑cexp 13967 ℙcprime 16547 Basecbs 17083 0_gc0g 17321 ↑_s cpws 17328 Mndcmnd 18556 Grpcgrp 18748 -_gcsg 18750 ._gcmg 18872 mulGrpcmgp 19896 1_rcur 19913 Ringcrg 19964 CRingccrg 19965 RingHom crh 20143 Fieldcfield 20186 Domncdomn 20750 IDomncidom 20751 ℤ_ringczring 20869 ℤRHomczrh 20900 ℤ/nℤczn 20903 var₁cv1 21547 Poly₁cpl1 21548 eval₁ce1 21680 deg₁ cdg1 25416 /_L clgs 26642

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 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-cnex 11107 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 ax-pre-sup 11129 ax-addf 11130 ax-mulf 11131

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 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-tp 4591 df-op 4593 df-uni 4866 df-int 4908 df-iun 4956 df-iin 4957 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-se 5589 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-isom 6505 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-of 7617 df-ofr 7618 df-om 7803 df-1st 7921 df-2nd 7922 df-supp 8093 df-tpos 8157 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-1o 8412 df-2o 8413 df-oadd 8416 df-er 8648 df-ec 8650 df-qs 8654 df-map 8767 df-pm 8768 df-ixp 8836 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-fsupp 9306 df-sup 9378 df-inf 9379 df-oi 9446 df-dju 9837 df-card 9875 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-div 11813 df-nn 12154 df-2 12216 df-3 12217 df-4 12218 df-5 12219 df-6 12220 df-7 12221 df-8 12222 df-9 12223 df-n0 12414 df-xnn0 12486 df-z 12500 df-dec 12619 df-uz 12764 df-q 12874 df-rp 12916 df-fz 13425 df-fzo 13568 df-fl 13697 df-mod 13775 df-seq 13907 df-exp 13968 df-hash 14231 df-cj 14984 df-re 14985 df-im 14986 df-sqrt 15120 df-abs 15121 df-dvds 16137 df-gcd 16375 df-prm 16548 df-phi 16638 df-pc 16709 df-struct 17019 df-sets 17036 df-slot 17054 df-ndx 17066 df-base 17084 df-ress 17113 df-plusg 17146 df-mulr 17147 df-starv 17148 df-sca 17149 df-vsca 17150 df-ip 17151 df-tset 17152 df-ple 17153 df-ds 17155 df-unif 17156 df-hom 17157 df-cco 17158 df-0g 17323 df-gsum 17324 df-prds 17329 df-pws 17331 df-imas 17390 df-qus 17391 df-mre 17466 df-mrc 17467 df-acs 17469 df-mgm 18497 df-sgrp 18546 df-mnd 18557 df-mhm 18601 df-submnd 18602 df-grp 18751 df-minusg 18752 df-sbg 18753 df-mulg 18873 df-subg 18925 df-nsg 18926 df-eqg 18927 df-ghm 19006 df-cntz 19097 df-cmn 19564 df-abl 19565 df-mgp 19897 df-ur 19914 df-srg 19918 df-ring 19966 df-cring 19967 df-oppr 20049 df-dvdsr 20070 df-unit 20071 df-invr 20101 df-dvr 20112 df-rnghom 20146 df-drng 20187 df-field 20188 df-subrg 20220 df-lmod 20324 df-lss 20393 df-lsp 20433 df-sra 20633 df-rgmod 20634 df-lidl 20635 df-rsp 20636 df-2idl 20702 df-nzr 20728 df-rlreg 20753 df-domn 20754 df-idom 20755 df-cnfld 20797 df-zring 20870 df-zrh 20904 df-zn 20907 df-assa 21259 df-asp 21260 df-ascl 21261 df-psr 21311 df-mvr 21312 df-mpl 21313 df-opsr 21315 df-evls 21482 df-evl 21483 df-psr1 21551 df-vr1 21552 df-ply1 21553 df-evl1 21682 df-lgs 26643

This theorem is referenced by: lgsqrlem4 26697

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