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Theorem evlsscasrng 22096

Description: The evaluation of a scalar of a subring yields the same result as evaluated as a scalar over the ring itself. (Contributed by AV, 12-Sep-2019.)

**Hypotheses**
Ref	Expression
evlsscasrng.q	⊢ 𝑄 = ((𝐼 evalSub 𝑆)‘𝑅)
evlsscasrng.o	⊢ 𝑂 = (𝐼 eval 𝑆)
evlsscasrng.w	⊢ 𝑊 = (𝐼 mPoly 𝑈)
evlsscasrng.u	⊢ 𝑈 = (𝑆 ↾_s 𝑅)
evlsscasrng.p	⊢ 𝑃 = (𝐼 mPoly 𝑆)
evlsscasrng.b	⊢ 𝐵 = (Base‘𝑆)
evlsscasrng.a	⊢ 𝐴 = (algSc‘𝑊)
evlsscasrng.c	⊢ 𝐶 = (algSc‘𝑃)
evlsscasrng.i	⊢ (𝜑 → 𝐼 ∈ 𝑉)
evlsscasrng.s	⊢ (𝜑 → 𝑆 ∈ CRing)
evlsscasrng.r	⊢ (𝜑 → 𝑅 ∈ (SubRing‘𝑆))
evlsscasrng.x	⊢ (𝜑 → 𝑋 ∈ 𝑅)

**Assertion**
Ref	Expression
evlsscasrng	⊢ (𝜑 → (𝑄‘(𝐴‘𝑋)) = (𝑂‘(𝐶‘𝑋)))

**Proof of Theorem evlsscasrng**
Step	Hyp	Ref	Expression
1		evlsscasrng.c	. . . . . 6 ⊢ 𝐶 = (algSc‘𝑃)
2		evlsscasrng.p	. . . . . . . 8 ⊢ 𝑃 = (𝐼 mPoly 𝑆)
3		evlsscasrng.s	. . . . . . . . . 10 ⊢ (𝜑 → 𝑆 ∈ CRing)
4		evlsscasrng.b	. . . . . . . . . . . 12 ⊢ 𝐵 = (Base‘𝑆)
5	4	ressid 17208	. . . . . . . . . . 11 ⊢ (𝑆 ∈ CRing → (𝑆 ↾_s 𝐵) = 𝑆)
6	5	eqcomd 2743	. . . . . . . . . 10 ⊢ (𝑆 ∈ CRing → 𝑆 = (𝑆 ↾_s 𝐵))
7	3, 6	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑆 = (𝑆 ↾_s 𝐵))
8	7	oveq2d 7377	. . . . . . . 8 ⊢ (𝜑 → (𝐼 mPoly 𝑆) = (𝐼 mPoly (𝑆 ↾_s 𝐵)))
9	2, 8	eqtrid 2784	. . . . . . 7 ⊢ (𝜑 → 𝑃 = (𝐼 mPoly (𝑆 ↾_s 𝐵)))
10	9	fveq2d 6839	. . . . . 6 ⊢ (𝜑 → (algSc‘𝑃) = (algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵))))
11	1, 10	eqtrid 2784	. . . . 5 ⊢ (𝜑 → 𝐶 = (algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵))))
12	11	fveq1d 6837	. . . 4 ⊢ (𝜑 → (𝐶‘𝑋) = ((algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵)))‘𝑋))
13	12	fveq2d 6839	. . 3 ⊢ (𝜑 → (((𝐼 evalSub 𝑆)‘𝐵)‘(𝐶‘𝑋)) = (((𝐼 evalSub 𝑆)‘𝐵)‘((algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵)))‘𝑋)))
14		eqid 2737	. . . 4 ⊢ ((𝐼 evalSub 𝑆)‘𝐵) = ((𝐼 evalSub 𝑆)‘𝐵)
15		eqid 2737	. . . 4 ⊢ (𝐼 mPoly (𝑆 ↾_s 𝐵)) = (𝐼 mPoly (𝑆 ↾_s 𝐵))
16		eqid 2737	. . . 4 ⊢ (𝑆 ↾_s 𝐵) = (𝑆 ↾_s 𝐵)
17		eqid 2737	. . . 4 ⊢ (algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵))) = (algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵)))
18		evlsscasrng.i	. . . 4 ⊢ (𝜑 → 𝐼 ∈ 𝑉)
19		crngring 20220	. . . . 5 ⊢ (𝑆 ∈ CRing → 𝑆 ∈ Ring)
20	4	subrgid 20544	. . . . 5 ⊢ (𝑆 ∈ Ring → 𝐵 ∈ (SubRing‘𝑆))
21	3, 19, 20	3syl 18	. . . 4 ⊢ (𝜑 → 𝐵 ∈ (SubRing‘𝑆))
22		evlsscasrng.r	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ (SubRing‘𝑆))
23	4	subrgss 20543	. . . . . 6 ⊢ (𝑅 ∈ (SubRing‘𝑆) → 𝑅 ⊆ 𝐵)
24	22, 23	syl 17	. . . . 5 ⊢ (𝜑 → 𝑅 ⊆ 𝐵)
25		evlsscasrng.x	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝑅)
26	24, 25	sseldd 3923	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
27	14, 15, 16, 4, 17, 18, 3, 21, 26	evlssca 22085	. . 3 ⊢ (𝜑 → (((𝐼 evalSub 𝑆)‘𝐵)‘((algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵)))‘𝑋)) = ((𝐵 ↑_m 𝐼) × {𝑋}))
28	13, 27	eqtrd 2772	. 2 ⊢ (𝜑 → (((𝐼 evalSub 𝑆)‘𝐵)‘(𝐶‘𝑋)) = ((𝐵 ↑_m 𝐼) × {𝑋}))
29		evlsscasrng.o	. . . . 5 ⊢ 𝑂 = (𝐼 eval 𝑆)
30	29, 4	evlval 22091	. . . 4 ⊢ 𝑂 = ((𝐼 evalSub 𝑆)‘𝐵)
31	30	a1i 11	. . 3 ⊢ (𝜑 → 𝑂 = ((𝐼 evalSub 𝑆)‘𝐵))
32	31	fveq1d 6837	. 2 ⊢ (𝜑 → (𝑂‘(𝐶‘𝑋)) = (((𝐼 evalSub 𝑆)‘𝐵)‘(𝐶‘𝑋)))
33		evlsscasrng.q	. . 3 ⊢ 𝑄 = ((𝐼 evalSub 𝑆)‘𝑅)
34		evlsscasrng.w	. . 3 ⊢ 𝑊 = (𝐼 mPoly 𝑈)
35		evlsscasrng.u	. . 3 ⊢ 𝑈 = (𝑆 ↾_s 𝑅)
36		evlsscasrng.a	. . 3 ⊢ 𝐴 = (algSc‘𝑊)
37	33, 34, 35, 4, 36, 18, 3, 22, 25	evlssca 22085	. 2 ⊢ (𝜑 → (𝑄‘(𝐴‘𝑋)) = ((𝐵 ↑_m 𝐼) × {𝑋}))
38	28, 32, 37	3eqtr4rd 2783	1 ⊢ (𝜑 → (𝑄‘(𝐴‘𝑋)) = (𝑂‘(𝐶‘𝑋)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ⊆ wss 3890 {csn 4568 × cxp 5623 ‘cfv 6493 (class class class)co 7361 ↑_m cmap 8767 Basecbs 17173 ↾_s cress 17194 Ringcrg 20208 CRingccrg 20209 SubRingcsubrg 20540 algSccascl 21845 mPoly cmpl 21899 evalSub ces 22063 eval cevl 22064

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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-of 7625 df-ofr 7626 df-om 7812 df-1st 7936 df-2nd 7937 df-supp 8105 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-er 8637 df-map 8769 df-pm 8770 df-ixp 8840 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-fsupp 9269 df-sup 9349 df-oi 9419 df-card 9857 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-nn 12169 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 df-n0 12432 df-z 12519 df-dec 12639 df-uz 12783 df-fz 13456 df-fzo 13603 df-seq 13958 df-hash 14287 df-struct 17111 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 df-plusg 17227 df-mulr 17228 df-sca 17230 df-vsca 17231 df-ip 17232 df-tset 17233 df-ple 17234 df-ds 17236 df-hom 17238 df-cco 17239 df-0g 17398 df-gsum 17399 df-prds 17404 df-pws 17406 df-mre 17542 df-mrc 17543 df-acs 17545 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-mhm 18745 df-submnd 18746 df-grp 18906 df-minusg 18907 df-sbg 18908 df-mulg 19038 df-subg 19093 df-ghm 19182 df-cntz 19286 df-cmn 19751 df-abl 19752 df-mgp 20116 df-rng 20128 df-ur 20157 df-srg 20162 df-ring 20210 df-cring 20211 df-rhm 20446 df-subrng 20517 df-subrg 20541 df-lmod 20851 df-lss 20921 df-lsp 20961 df-assa 21846 df-asp 21847 df-ascl 21848 df-psr 21902 df-mvr 21903 df-mpl 21904 df-evls 22065 df-evl 22066

This theorem is referenced by: evlsca 22097

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