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Theorem evlsscasrng 22075

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 17183	. . . . . . . . . . 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 7384	. . . . . . . 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 6846	. . . . . 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 6844	. . . 4 ⊢ (𝜑 → (𝐶‘𝑋) = ((algSc‘(𝐼 mPoly (𝑆 ↾_s 𝐵)))‘𝑋))
13	12	fveq2d 6846	. . 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 20195	. . . . 5 ⊢ (𝑆 ∈ CRing → 𝑆 ∈ Ring)
20	4	subrgid 20521	. . . . 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 20520	. . . . . 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 3936	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
27	14, 15, 16, 4, 17, 18, 3, 21, 26	evlssca 22064	. . 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 22070	. . . 4 ⊢ 𝑂 = ((𝐼 evalSub 𝑆)‘𝐵)
31	30	a1i 11	. . 3 ⊢ (𝜑 → 𝑂 = ((𝐼 evalSub 𝑆)‘𝐵))
32	31	fveq1d 6844	. 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 22064	. 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 3903 {csn 4582 × cxp 5630 ‘cfv 6500 (class class class)co 7368 ↑_m cmap 8775 Basecbs 17148 ↾_s cress 17169 Ringcrg 20183 CRingccrg 20184 SubRingcsubrg 20517 algSccascl 21822 mPoly cmpl 21877 evalSub ces 22042 eval cevl 22043

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 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115

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 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-of 7632 df-ofr 7633 df-om 7819 df-1st 7943 df-2nd 7944 df-supp 8113 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-2o 8408 df-er 8645 df-map 8777 df-pm 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9277 df-sup 9357 df-oi 9427 df-card 9863 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-fz 13436 df-fzo 13583 df-seq 13937 df-hash 14266 df-struct 17086 df-sets 17103 df-slot 17121 df-ndx 17133 df-base 17149 df-ress 17170 df-plusg 17202 df-mulr 17203 df-sca 17205 df-vsca 17206 df-ip 17207 df-tset 17208 df-ple 17209 df-ds 17211 df-hom 17213 df-cco 17214 df-0g 17373 df-gsum 17374 df-prds 17379 df-pws 17381 df-mre 17517 df-mrc 17518 df-acs 17520 df-mgm 18577 df-sgrp 18656 df-mnd 18672 df-mhm 18720 df-submnd 18721 df-grp 18881 df-minusg 18882 df-sbg 18883 df-mulg 19013 df-subg 19068 df-ghm 19157 df-cntz 19261 df-cmn 19726 df-abl 19727 df-mgp 20091 df-rng 20103 df-ur 20132 df-srg 20137 df-ring 20185 df-cring 20186 df-rhm 20423 df-subrng 20494 df-subrg 20518 df-lmod 20828 df-lss 20898 df-lsp 20938 df-assa 21823 df-asp 21824 df-ascl 21825 df-psr 21880 df-mvr 21881 df-mpl 21882 df-evls 22044 df-evl 22045

This theorem is referenced by: evlsca 22076

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