Theorem evls1var 22342

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 22264	. . . 4 ⊢ (𝜑 → (var1‘𝑆) = (var1‘𝑈))
6	1, 5	eqtr4id 2796	. . 3 ⊢ (𝜑 → 𝑋 = (var1‘𝑆))
7	6	fveq2d 6910	. 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 8518	. . . . . . 7 ⊢ 1o ∈ On
13	12	a1i 11	. . . . . 6 ⊢ (𝜑 → 1o ∈ On)
14		evls1var.s	. . . . . 6 ⊢ (𝜑 → 𝑆 ∈ CRing)
15		0lt1o 8542	. . . . . . 7 ⊢ ∅ ∈ 1o
16	15	a1i 11	. . . . . 6 ⊢ (𝜑 → ∅ ∈ 1o)
17	8, 9, 10, 4, 11, 13, 14, 3, 16	evlsvarsrng 22123	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
18	2	vr1val 22193	. . . . . . 7 ⊢ (var1‘𝑆) = ((1o mVar 𝑆)‘∅)
19		eqid 2737	. . . . . . . . 9 ⊢ (1o mVar 𝑆) = (1o mVar 𝑆)
20	19, 13, 3, 4	subrgmvr 22051	. . . . . . . 8 ⊢ (𝜑 → (1o mVar 𝑆) = (1o mVar 𝑈))
21	20	fveq1d 6908	. . . . . . 7 ⊢ (𝜑 → ((1o mVar 𝑆)‘∅) = ((1o mVar 𝑈)‘∅))
22	18, 21	eqtrid 2789	. . . . . 6 ⊢ (𝜑 → (var1‘𝑆) = ((1o mVar 𝑈)‘∅))
23	22	fveq2d 6910	. . . . 5 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = (((1o evalSub 𝑆)‘𝑅)‘((1o mVar 𝑈)‘∅)))
24	22	fveq2d 6910	. . . . 5 ⊢ (𝜑 → ((1o eval 𝑆)‘(var1‘𝑆)) = ((1o eval 𝑆)‘((1o mVar 𝑈)‘∅)))
25	17, 23, 24	3eqtr4d 2787	. . . 4 ⊢ (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) = ((1o eval 𝑆)‘(var1‘𝑆)))
26	25	coeq1d 5872	. . 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 6909	. . . . . . . 8 ⊢ (Poly1‘𝑈) = (Poly1‘(𝑆 ↾s 𝑅))
30	29	fveq2i 6909	. . . . . . 7 ⊢ (Base‘(Poly1‘𝑈)) = (Base‘(Poly1‘(𝑆 ↾s 𝑅)))
31	28, 30	ply1bas 22196	. . . . . 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 22265	. . . 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 22324	. . . 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 1373	. . 3 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((((1o evalSub 𝑆)‘𝑅)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
40		crngring 20242	. . . . 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 22196	. . . . . . 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 22219	. . . . 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 22333	. . . 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 584	. . 3 ⊢ (𝜑 → ((eval1‘𝑆)‘(var1‘𝑆)) = (((1o eval 𝑆)‘(var1‘𝑆)) ∘ (𝑦 ∈ 𝐵 ↦ (1o × {𝑦}))))
52	26, 39, 51	3eqtr4d 2787	. 2 ⊢ (𝜑 → (𝑄‘(var1‘𝑆)) = ((eval1‘𝑆)‘(var1‘𝑆)))
53	47, 2, 11	evl1var 22340	. . 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 2781	1 ⊢ (𝜑 → (𝑄‘𝑋) = ( I ↾ 𝐵))

Syntax hints:   → wi 4   = wceq 1540   ∈ wcel 2108  ∅c0 4333  {csn 4626   ↦ cmpt 5225   I cid 5577   × cxp 5683   ↾ cres 5687   ∘ ccom 5689  Oncon0 6384  ‘cfv 6561  (class class class)co 7431  1_oc1o 8499  Basecbs 17247   ↾_s cress 17274  Ringcrg 20230  CRingccrg 20231  SubRingcsubrg 20569   mVar cmvr 21925   mPoly cmpl 21926   evalSub ces 22096   eval cevl 22097  var₁cv1 22177  Poly₁cpl1 22178   evalSub₁ ces1 22317  eval₁ce1 22318

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-rep 5279  ax-sep 5296  ax-nul 5306  ax-pow 5365  ax-pr 5432  ax-un 7755  ax-cnex 11211  ax-resscn 11212  ax-1cn 11213  ax-icn 11214  ax-addcl 11215  ax-addrcl 11216  ax-mulcl 11217  ax-mulrcl 11218  ax-mulcom 11219  ax-addass 11220  ax-mulass 11221  ax-distr 11222  ax-i2m1 11223  ax-1ne0 11224  ax-1rid 11225  ax-rnegex 11226  ax-rrecex 11227  ax-cnre 11228  ax-pre-lttri 11229  ax-pre-lttrn 11230  ax-pre-ltadd 11231  ax-pre-mulgt0 11232

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-nel 3047  df-ral 3062  df-rex 3071  df-rmo 3380  df-reu 3381  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-pss 3971  df-nul 4334  df-if 4526  df-pw 4602  df-sn 4627  df-pr 4629  df-tp 4631  df-op 4633  df-uni 4908  df-int 4947  df-iun 4993  df-iin 4994  df-br 5144  df-opab 5206  df-mpt 5226  df-tr 5260  df-id 5578  df-eprel 5584  df-po 5592  df-so 5593  df-fr 5637  df-se 5638  df-we 5639  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-ima 5698  df-pred 6321  df-ord 6387  df-on 6388  df-lim 6389  df-suc 6390  df-iota 6514  df-fun 6563  df-fn 6564  df-f 6565  df-f1 6566  df-fo 6567  df-f1o 6568  df-fv 6569  df-isom 6570  df-riota 7388  df-ov 7434  df-oprab 7435  df-mpo 7436  df-of 7697  df-ofr 7698  df-om 7888  df-1st 8014  df-2nd 8015  df-supp 8186  df-frecs 8306  df-wrecs 8337  df-recs 8411  df-rdg 8450  df-1o 8506  df-2o 8507  df-er 8745  df-map 8868  df-pm 8869  df-ixp 8938  df-en 8986  df-dom 8987  df-sdom 8988  df-fin 8989  df-fsupp 9402  df-sup 9482  df-oi 9550  df-card 9979  df-pnf 11297  df-mnf 11298  df-xr 11299  df-ltxr 11300  df-le 11301  df-sub 11494  df-neg 11495  df-nn 12267  df-2 12329  df-3 12330  df-4 12331  df-5 12332  df-6 12333  df-7 12334  df-8 12335  df-9 12336  df-n0 12527  df-z 12614  df-dec 12734  df-uz 12879  df-fz 13548  df-fzo 13695  df-seq 14043  df-hash 14370  df-struct 17184  df-sets 17201  df-slot 17219  df-ndx 17231  df-base 17248  df-ress 17275  df-plusg 17310  df-mulr 17311  df-sca 17313  df-vsca 17314  df-ip 17315  df-tset 17316  df-ple 17317  df-ds 17319  df-hom 17321  df-cco 17322  df-0g 17486  df-gsum 17487  df-prds 17492  df-pws 17494  df-mre 17629  df-mrc 17630  df-acs 17632  df-mgm 18653  df-sgrp 18732  df-mnd 18748  df-mhm 18796  df-submnd 18797  df-grp 18954  df-minusg 18955  df-sbg 18956  df-mulg 19086  df-subg 19141  df-ghm 19231  df-cntz 19335  df-cmn 19800  df-abl 19801  df-mgp 20138  df-rng 20150  df-ur 20179  df-srg 20184  df-ring 20232  df-cring 20233  df-rhm 20472  df-subrng 20546  df-subrg 20570  df-lmod 20860  df-lss 20930  df-lsp 20970  df-assa 21873  df-asp 21874  df-ascl 21875  df-psr 21929  df-mvr 21930  df-mpl 21931  df-opsr 21933  df-evls 22098  df-evl 22099  df-psr1 22181  df-vr1 22182  df-ply1 22183  df-evls1 22319  df-evl1 22320

This theorem is referenced by:  evls1varsrng  22344  evls1varpwval  22372  algextdeglem4  33761  2sqr3minply  33791