Theorem evls1var 22455

Description: Univariate polynomial evaluation for subrings maps the variable to the identity function. (Contributed by AV, 13-Sep-2019.)

Hypotheses

Ref	Expression
evls1var.q	⊢ 𝑄 = (𝑆 evalSub1 𝑅)
evls1var.x	⊢ 𝑋 = (var1‘𝑈)
evls1var.u	⊢ 𝑈 = (𝑆 ↾s 𝑅)
evls1var.b	⊢ 𝐵 = (Base‘𝑆)
evls1var.s	⊢ (𝜑 → 𝑆 ∈ CRing)
evls1var.r	⊢ (𝜑 → 𝑅 ∈ (SubRing‘𝑆))

Assertion

Ref	Expression
evls1var	⊢ (𝜑 → (𝑄‘𝑋) = ( I ↾ 𝐵))

Proof of Theorem evls1var

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		evls1var.x	. . . 4 ⊢ 𝑋 = (var1‘𝑈)
2		eqid 2765	. . . . 5 ⊢ (var1‘𝑆) = (var1‘𝑆)
3		evls1var.r	. . . . 5 ⊢ (𝜑 → 𝑅 ∈ (SubRing‘𝑆))
4		evls1var.u	. . . . 5 ⊢ 𝑈 = (𝑆 ↾s 𝑅)
5	2, 3, 4	subrgvr1 22379	. . . 4 ⊢ (𝜑 → (var1‘𝑆) = (var1‘𝑈))
6	1, 5	eqtr4id 2819	. . 3 ⊢ (𝜑 → 𝑋 = (var1‘𝑆))
7	6	fveq2d 6875	. 2 ⊢ (𝜑 → (𝑄‘𝑋) = (𝑄‘(var1‘𝑆)))
8		eqid 2765	. . . . . 6 ⊢ ((1o evalSub 𝑆)‘𝑅) = ((1o evalSub 𝑆)‘𝑅)
9		eqid 2765	. . . . . 6 ⊢ (1o eval 𝑆) = (1o eval 𝑆)
10		eqid 2765	. . . . . 6 ⊢ (1o mVar 𝑈) = (1o mVar 𝑈)
11		evls1var.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝑆)
12		1on 8454	. . . . . . 7 ⊢ 1o ∈ On
13	12	a1i 11	. . . . . 6 ⊢ (𝜑 → 1o ∈ On)
14		evls1var.s	. . . . . 6 ⊢ (𝜑 → 𝑆 ∈ CRing)
15		0lt1o 8477	. . . . . . 7 ⊢ ∅ ∈ 1o
16	15	a1i 11	. . . . . 6 ⊢ (𝜑 → ∅ ∈ 1o)
17	8, 9, 10, 4, 11, 13, 14, 3, 16	evlsvarsrng 22215	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
18	2	vr1val 22309	. . . . . . 7 ⊢ (var1‘𝑆) = ((1o mVar 𝑆)‘∅)
19		eqid 2765	. . . . . . . . 9 ⊢ (1o mVar 𝑆) = (1o mVar 𝑆)
20	19, 13, 3, 4	subrgmvr 22141	. . . . . . . 8 ⊢ (𝜑 → (1o mVar 𝑆) = (1o mVar 𝑈))
21	20	fveq1d 6873	. . . . . . 7 ⊢ (𝜑 → ((1o mVar 𝑆)‘∅) = ((1o mVar 𝑈)‘∅))
22	18, 21	eqtrid 2812	. . . . . 6 ⊢ (𝜑 → (var1‘𝑆) = ((1o mVar 𝑈)‘∅))
23	22	fveq2d 6875	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)))
24	22	fveq2d 6875	. . . . 5 ⊢ (𝜑 → ((1o eval 𝑆)‘(var1‘𝑆)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
25	17, 23, 24	3eqtr4d 2810	. . . 4 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = ((1o eval 𝑆)‘(var1‘𝑆)))
26	25	coeq1d 5837	. . 3 ⊢ (𝜑 → ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
27		eqid 2765	. . . . 5 ⊢ (Poly1‘𝑈) = (Poly1‘𝑈)
28		eqid 2765	. . . . . . 7 ⊢ (Poly1‘(𝑆 ↾s 𝑅)) = (Poly1‘(𝑆 ↾s 𝑅))
29	4	fveq2i 6874	. . . . . . . 8 ⊢ (Poly1‘𝑈) = (Poly1‘(𝑆 ↾s 𝑅))
30	29	fveq2i 6874	. . . . . . 7 ⊢ (Base‘(Poly1‘𝑈)) = (Base‘(Poly1‘(𝑆 ↾s 𝑅)))
31	28, 30	ply1bas 22312	. . . . . 6 ⊢ (Base‘(Poly1‘𝑈)) = (Base‘(1o mPoly (𝑆 ↾s 𝑅)))
32	31	eqcomi 2774	. . . . 5 ⊢ (Base‘(1o mPoly (𝑆 ↾s 𝑅))) = (Base‘(Poly1‘𝑈))
33	2, 3, 4, 27, 32	subrgvr1cl 22380	. . . 4 ⊢ (𝜑 → (var1‘𝑆) ∈ (Base‘(1o mPoly (𝑆 ↾s 𝑅))))
34		evls1var.q	. . . . 5 ⊢ 𝑄 = (𝑆 evalSub1 𝑅)
35		eqid 2765	. . . . 5 ⊢ (1o evalSub 𝑆) = (1o evalSub 𝑆)
36		eqid 2765	. . . . 5 ⊢ (1o mPoly (𝑆 ↾s 𝑅)) = (1o mPoly (𝑆 ↾s 𝑅))
37		eqid 2765	. . . . 5 ⊢ (Base‘(1o mPoly (𝑆 ↾s 𝑅))) = (Base‘(1o mPoly (𝑆 ↾s 𝑅)))
38	34, 35, 11, 36, 37	evls1val 22437	. . . 4 ⊢ ((𝑆 ∈ CRing ∧ 𝑅 ∈ (SubRing‘𝑆) ∧ (var1‘𝑆) ∈ (Base‘(1o mPoly (𝑆 ↾s 𝑅)))) → (𝑄‘(var1‘𝑆)) = ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
39	14, 3, 33, 38	syl3anc 1394	. . 3 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
40		crngring 20315	. . . . 5 ⊢ (𝑆 ∈ CRing → 𝑆 ∈ Ring)
41		eqid 2765	. . . . . 6 ⊢ (Poly1‘𝑆) = (Poly1‘𝑆)
42		eqid 2765	. . . . . . . 8 ⊢ (Base‘(Poly1‘𝑆)) = (Base‘(Poly1‘𝑆))
43	41, 42	ply1bas 22312	. . . . . . 7 ⊢ (Base‘(Poly1‘𝑆)) = (Base‘(1o mPoly 𝑆))
44	43	eqcomi 2774	. . . . . 6 ⊢ (Base‘(1o mPoly 𝑆)) = (Base‘(Poly1‘𝑆))
45	2, 41, 44	vr1cl 22334	. . . . 5 ⊢ (𝑆 ∈ Ring → (var1‘𝑆) ∈ (Base‘(1o mPoly 𝑆)))
46	14, 40, 45	3syl 19	. . . 4 ⊢ (𝜑 → (var1‘𝑆) ∈ (Base‘(1o mPoly 𝑆)))
47		eqid 2765	. . . . 5 ⊢ (eval1‘𝑆) = (eval1‘𝑆)
48		eqid 2765	. . . . 5 ⊢ (1o mPoly 𝑆) = (1o mPoly 𝑆)
49		eqid 2765	. . . . 5 ⊢ (Base‘(1o mPoly 𝑆)) = (Base‘(1o mPoly 𝑆))
50	47, 9, 11, 48, 49	evl1val 22446	. . . 4 ⊢ ((𝑆 ∈ CRing ∧ (var1‘𝑆) ∈ (Base‘(1o mPoly 𝑆))) → ((eval1‘𝑆)‘(var1‘𝑆)) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
51	14, 46, 50	syl2anc 595	. . 3 ⊢ (𝜑 → ((eval1‘𝑆)‘(var1‘𝑆)) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
52	26, 39, 51	3eqtr4d 2810	. 2 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((eval1‘𝑆)‘(var1‘𝑆)))
53	47, 2, 11	evl1var 22453	. . 3 ⊢ (𝑆 ∈ CRing → ((eval1‘𝑆)‘(var1‘𝑆)) = ( I ↾ 𝐵))
54	14, 53	syl 18	. 2 ⊢ (𝜑 → ((eval1‘𝑆)‘(var1‘𝑆)) = ( I ↾ 𝐵))
55	7, 52, 54	3eqtrd 2804	1 ⊢ (𝜑 → (𝑄‘𝑋) = ( I ↾ 𝐵))

Syntax hints:   → wi 4   = wceq 1563   ∈ wcel 2145  ∅c0 4288  {csn 4585   ↦ cmpt 5185   I cid 5545   × cxp 5649   ↾ cres 5653   ∘ ccom 5655  Oncon0 6349  ‘cfv 6525  (class class class)co 7400  1_oc1o 8434  Basecbs 17257   ↾_s cress 17278  Ringcrg 20303  CRingccrg 20304  SubRingcsubrg 20642   mVar cmvr 22012   mPoly cmpl 22013   evalSub ces 22180   eval cevl 22181  var₁cv1 22293  Poly₁cpl1 22294   evalSub₁ ces1 22430  eval₁ce1 22431

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-rep 5231  ax-sep 5250  ax-nul 5260  ax-pow 5326  ax-pr 5394  ax-un 7722  ax-cnex 11144  ax-resscn 11145  ax-1cn 11146  ax-icn 11147  ax-addcl 11148  ax-addrcl 11149  ax-mulcl 11150  ax-mulrcl 11151  ax-mulcom 11152  ax-addass 11153  ax-mulass 11154  ax-distr 11155  ax-i2m1 11156  ax-1ne0 11157  ax-1rid 11158  ax-rnegex 11159  ax-rrecex 11160  ax-cnre 11161  ax-pre-lttri 11162  ax-pre-lttrn 11163  ax-pre-ltadd 11164  ax-pre-mulgt0 11165

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-nel 3065  df-ral 3080  df-rex 3090  df-rmo 3370  df-reu 3371  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-pss 3927  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-tp 4590  df-op 4592  df-uni 4868  df-int 4908  df-iun 4953  df-iin 4954  df-br 5105  df-opab 5167  df-mpt 5186  df-tr 5212  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-se 5605  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6291  df-ord 6352  df-on 6353  df-lim 6354  df-suc 6355  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533  df-isom 6534  df-riota 7357  df-ov 7403  df-oprab 7404  df-mpo 7405  df-of 7664  df-ofr 7665  df-om 7851  df-1st 7974  df-2nd 7975  df-supp 8145  df-frecs 8266  df-wrecs 8297  df-recs 8346  df-rdg 8385  df-1o 8441  df-2o 8442  df-er 8682  df-map 8814  df-pm 8815  df-ixp 8884  df-en 8932  df-dom 8933  df-sdom 8934  df-fin 8935  df-fsupp 9310  df-sup 9390  df-oi 9460  df-card 9913  df-pnf 11233  df-mnf 11234  df-xr 11235  df-ltxr 11236  df-le 11237  df-sub 11431  df-neg 11432  df-nn 12222  df-2 12291  df-3 12292  df-4 12293  df-5 12294  df-6 12295  df-7 12296  df-8 12297  df-9 12298  df-n0 12493  df-z 12580  df-dec 12700  df-uz 12851  df-fz 13524  df-fzo 13671  df-seq 14026  df-hash 14355  df-struct 17195  df-sets 17212  df-slot 17230  df-ndx 17242  df-base 17258  df-ress 17279  df-plusg 17311  df-mulr 17312  df-sca 17314  df-vsca 17315  df-ip 17316  df-tset 17317  df-ple 17318  df-ds 17320  df-hom 17322  df-cco 17323  df-0g 17482  df-gsum 17483  df-prds 17488  df-pws 17490  df-mre 17626  df-mrc 17627  df-acs 17629  df-mgm 18686  df-sgrp 18765  df-mnd 18781  df-mhm 18829  df-submnd 18830  df-grp 18991  df-minusg 18992  df-sbg 18993  df-mulg 19122  df-subg 19177  df-ghm 19272  df-cntz 19375  df-cmn 19840  df-abl 19841  df-mgp 20205  df-rng 20219  df-ur 20252  df-srg 20257  df-ring 20305  df-cring 20306  df-rhm 20542  df-subrng 20619  df-subrg 20643  df-lmod 20949  df-lss 21019  df-lsp 21059  df-assa 21960  df-asp 21961  df-ascl 21962  df-psr 22016  df-mvr 22017  df-mpl 22018  df-opsr 22020  df-evls 22182  df-evl 22183  df-psr1 22297  df-vr1 22298  df-ply1 22299  df-evls1 22432  df-evl1 22433

This theorem is referenced by:  evls1varsrng  22457  evls1varpwval  22485  vr1nz  33795  algextdeglem4  34022  2sqr3minply  34082  cos9thpiminplylem6  34089