Theorem evls1var 22313

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 2737	. . . . 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 22236	. . . 4 ⊢ (𝜑 → (var1‘𝑆) = (var1‘𝑈))
6	1, 5	eqtr4id 2791	. . 3 ⊢ (𝜑 → 𝑋 = (var1‘𝑆))
7	6	fveq2d 6838	. 2 ⊢ (𝜑 → (𝑄‘𝑋) = (𝑄‘(var1‘𝑆)))
8		eqid 2737	. . . . . 6 ⊢ ((1o evalSub 𝑆)‘𝑅) = ((1o evalSub 𝑆)‘𝑅)
9		eqid 2737	. . . . . 6 ⊢ (1o eval 𝑆) = (1o eval 𝑆)
10		eqid 2737	. . . . . 6 ⊢ (1o mVar 𝑈) = (1o mVar 𝑈)
11		evls1var.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝑆)
12		1on 8410	. . . . . . 7 ⊢ 1o ∈ On
13	12	a1i 11	. . . . . 6 ⊢ (𝜑 → 1o ∈ On)
14		evls1var.s	. . . . . 6 ⊢ (𝜑 → 𝑆 ∈ CRing)
15		0lt1o 8432	. . . . . . 7 ⊢ ∅ ∈ 1o
16	15	a1i 11	. . . . . 6 ⊢ (𝜑 → ∅ ∈ 1o)
17	8, 9, 10, 4, 11, 13, 14, 3, 16	evlsvarsrng 22095	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
18	2	vr1val 22165	. . . . . . 7 ⊢ (var1‘𝑆) = ((1o mVar 𝑆)‘∅)
19		eqid 2737	. . . . . . . . 9 ⊢ (1o mVar 𝑆) = (1o mVar 𝑆)
20	19, 13, 3, 4	subrgmvr 22021	. . . . . . . 8 ⊢ (𝜑 → (1o mVar 𝑆) = (1o mVar 𝑈))
21	20	fveq1d 6836	. . . . . . 7 ⊢ (𝜑 → ((1o mVar 𝑆)‘∅) = ((1o mVar 𝑈)‘∅))
22	18, 21	eqtrid 2784	. . . . . 6 ⊢ (𝜑 → (var1‘𝑆) = ((1o mVar 𝑈)‘∅))
23	22	fveq2d 6838	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)))
24	22	fveq2d 6838	. . . . 5 ⊢ (𝜑 → ((1o eval 𝑆)‘(var1‘𝑆)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
25	17, 23, 24	3eqtr4d 2782	. . . 4 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = ((1o eval 𝑆)‘(var1‘𝑆)))
26	25	coeq1d 5810	. . 3 ⊢ (𝜑 → ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
27		eqid 2737	. . . . 5 ⊢ (Poly1‘𝑈) = (Poly1‘𝑈)
28		eqid 2737	. . . . . . 7 ⊢ (Poly1‘(𝑆 ↾s 𝑅)) = (Poly1‘(𝑆 ↾s 𝑅))
29	4	fveq2i 6837	. . . . . . . 8 ⊢ (Poly1‘𝑈) = (Poly1‘(𝑆 ↾s 𝑅))
30	29	fveq2i 6837	. . . . . . 7 ⊢ (Base‘(Poly1‘𝑈)) = (Base‘(Poly1‘(𝑆 ↾s 𝑅)))
31	28, 30	ply1bas 22168	. . . . . 6 ⊢ (Base‘(Poly1‘𝑈)) = (Base‘(1o mPoly (𝑆 ↾s 𝑅)))
32	31	eqcomi 2746	. . . . 5 ⊢ (Base‘(1o mPoly (𝑆 ↾s 𝑅))) = (Base‘(Poly1‘𝑈))
33	2, 3, 4, 27, 32	subrgvr1cl 22237	. . . 4 ⊢ (𝜑 → (var1‘𝑆) ∈ (Base‘(1o mPoly (𝑆 ↾s 𝑅))))
34		evls1var.q	. . . . 5 ⊢ 𝑄 = (𝑆 evalSub1 𝑅)
35		eqid 2737	. . . . 5 ⊢ (1o evalSub 𝑆) = (1o evalSub 𝑆)
36		eqid 2737	. . . . 5 ⊢ (1o mPoly (𝑆 ↾s 𝑅)) = (1o mPoly (𝑆 ↾s 𝑅))
37		eqid 2737	. . . . 5 ⊢ (Base‘(1o mPoly (𝑆 ↾s 𝑅))) = (Base‘(1o mPoly (𝑆 ↾s 𝑅)))
38	34, 35, 11, 36, 37	evls1val 22295	. . . 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 1374	. . 3 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
40		crngring 20217	. . . . 5 ⊢ (𝑆 ∈ CRing → 𝑆 ∈ Ring)
41		eqid 2737	. . . . . 6 ⊢ (Poly1‘𝑆) = (Poly1‘𝑆)
42		eqid 2737	. . . . . . . 8 ⊢ (Base‘(Poly1‘𝑆)) = (Base‘(Poly1‘𝑆))
43	41, 42	ply1bas 22168	. . . . . . 7 ⊢ (Base‘(Poly1‘𝑆)) = (Base‘(1o mPoly 𝑆))
44	43	eqcomi 2746	. . . . . 6 ⊢ (Base‘(1o mPoly 𝑆)) = (Base‘(Poly1‘𝑆))
45	2, 41, 44	vr1cl 22191	. . . . 5 ⊢ (𝑆 ∈ Ring → (var1‘𝑆) ∈ (Base‘(1o mPoly 𝑆)))
46	14, 40, 45	3syl 18	. . . 4 ⊢ (𝜑 → (var1‘𝑆) ∈ (Base‘(1o mPoly 𝑆)))
47		eqid 2737	. . . . 5 ⊢ (eval1‘𝑆) = (eval1‘𝑆)
48		eqid 2737	. . . . 5 ⊢ (1o mPoly 𝑆) = (1o mPoly 𝑆)
49		eqid 2737	. . . . 5 ⊢ (Base‘(1o mPoly 𝑆)) = (Base‘(1o mPoly 𝑆))
50	47, 9, 11, 48, 49	evl1val 22304	. . . 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 585	. . 3 ⊢ (𝜑 → ((eval1‘𝑆)‘(var1‘𝑆)) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
52	26, 39, 51	3eqtr4d 2782	. 2 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((eval1‘𝑆)‘(var1‘𝑆)))
53	47, 2, 11	evl1var 22311	. . 3 ⊢ (𝑆 ∈ CRing → ((eval1‘𝑆)‘(var1‘𝑆)) = ( I ↾ 𝐵))
54	14, 53	syl 17	. 2 ⊢ (𝜑 → ((eval1‘𝑆)‘(var1‘𝑆)) = ( I ↾ 𝐵))
55	7, 52, 54	3eqtrd 2776	1 ⊢ (𝜑 → (𝑄‘𝑋) = ( I ↾ 𝐵))

Syntax hints:   → wi 4   = wceq 1542   ∈ wcel 2114  ∅c0 4274  {csn 4568   ↦ cmpt 5167   I cid 5518   × cxp 5622   ↾ cres 5626   ∘ ccom 5628  Oncon0 6317  ‘cfv 6492  (class class class)co 7360  1_oc1o 8391  Basecbs 17170   ↾_s cress 17191  Ringcrg 20205  CRingccrg 20206  SubRingcsubrg 20537   mVar cmvr 21895   mPoly cmpl 21896   evalSub ces 22060   eval cevl 22061  var₁cv1 22149  Poly₁cpl1 22150   evalSub₁ ces1 22288  eval₁ce1 22289

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 5212  ax-sep 5231  ax-nul 5241  ax-pow 5302  ax-pr 5370  ax-un 7682  ax-cnex 11085  ax-resscn 11086  ax-1cn 11087  ax-icn 11088  ax-addcl 11089  ax-addrcl 11090  ax-mulcl 11091  ax-mulrcl 11092  ax-mulcom 11093  ax-addass 11094  ax-mulass 11095  ax-distr 11096  ax-i2m1 11097  ax-1ne0 11098  ax-1rid 11099  ax-rnegex 11100  ax-rrecex 11101  ax-cnre 11102  ax-pre-lttri 11103  ax-pre-lttrn 11104  ax-pre-ltadd 11105  ax-pre-mulgt0 11106

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 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-se 5578  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-isom 6501  df-riota 7317  df-ov 7363  df-oprab 7364  df-mpo 7365  df-of 7624  df-ofr 7625  df-om 7811  df-1st 7935  df-2nd 7936  df-supp 8104  df-frecs 8224  df-wrecs 8255  df-recs 8304  df-rdg 8342  df-1o 8398  df-2o 8399  df-er 8636  df-map 8768  df-pm 8769  df-ixp 8839  df-en 8887  df-dom 8888  df-sdom 8889  df-fin 8890  df-fsupp 9268  df-sup 9348  df-oi 9418  df-card 9854  df-pnf 11172  df-mnf 11173  df-xr 11174  df-ltxr 11175  df-le 11176  df-sub 11370  df-neg 11371  df-nn 12166  df-2 12235  df-3 12236  df-4 12237  df-5 12238  df-6 12239  df-7 12240  df-8 12241  df-9 12242  df-n0 12429  df-z 12516  df-dec 12636  df-uz 12780  df-fz 13453  df-fzo 13600  df-seq 13955  df-hash 14284  df-struct 17108  df-sets 17125  df-slot 17143  df-ndx 17155  df-base 17171  df-ress 17192  df-plusg 17224  df-mulr 17225  df-sca 17227  df-vsca 17228  df-ip 17229  df-tset 17230  df-ple 17231  df-ds 17233  df-hom 17235  df-cco 17236  df-0g 17395  df-gsum 17396  df-prds 17401  df-pws 17403  df-mre 17539  df-mrc 17540  df-acs 17542  df-mgm 18599  df-sgrp 18678  df-mnd 18694  df-mhm 18742  df-submnd 18743  df-grp 18903  df-minusg 18904  df-sbg 18905  df-mulg 19035  df-subg 19090  df-ghm 19179  df-cntz 19283  df-cmn 19748  df-abl 19749  df-mgp 20113  df-rng 20125  df-ur 20154  df-srg 20159  df-ring 20207  df-cring 20208  df-rhm 20443  df-subrng 20514  df-subrg 20538  df-lmod 20848  df-lss 20918  df-lsp 20958  df-assa 21843  df-asp 21844  df-ascl 21845  df-psr 21899  df-mvr 21900  df-mpl 21901  df-opsr 21903  df-evls 22062  df-evl 22063  df-psr1 22153  df-vr1 22154  df-ply1 22155  df-evls1 22290  df-evl1 22291

This theorem is referenced by:  evls1varsrng  22315  evls1varpwval  22343  vr1nz  33668  algextdeglem4  33880  2sqr3minply  33940  cos9thpiminplylem6  33947