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Theorem evls1sca 22235
Description: Univariate polynomial evaluation maps scalars to constant functions. (Contributed by AV, 8-Sep-2019.)
Hypotheses
Ref Expression
evls1sca.q 𝑄 = (𝑆 evalSub1 𝑅)
evls1sca.w 𝑊 = (Poly1𝑈)
evls1sca.u 𝑈 = (𝑆s 𝑅)
evls1sca.b 𝐵 = (Base‘𝑆)
evls1sca.a 𝐴 = (algSc‘𝑊)
evls1sca.s (𝜑𝑆 ∈ CRing)
evls1sca.r (𝜑𝑅 ∈ (SubRing‘𝑆))
evls1sca.x (𝜑𝑋𝑅)
Assertion
Ref Expression
evls1sca (𝜑 → (𝑄‘(𝐴𝑋)) = (𝐵 × {𝑋}))

Proof of Theorem evls1sca
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 1on 8492 . . . . . 6 1o ∈ On
2 evls1sca.s . . . . . 6 (𝜑𝑆 ∈ CRing)
3 evls1sca.r . . . . . 6 (𝜑𝑅 ∈ (SubRing‘𝑆))
4 eqid 2728 . . . . . . 7 ((1o evalSub 𝑆)‘𝑅) = ((1o evalSub 𝑆)‘𝑅)
5 eqid 2728 . . . . . . 7 (1o mPoly 𝑈) = (1o mPoly 𝑈)
6 evls1sca.u . . . . . . 7 𝑈 = (𝑆s 𝑅)
7 eqid 2728 . . . . . . 7 (𝑆s (𝐵m 1o)) = (𝑆s (𝐵m 1o))
8 evls1sca.b . . . . . . 7 𝐵 = (Base‘𝑆)
94, 5, 6, 7, 8evlsrhm 22027 . . . . . 6 ((1o ∈ On ∧ 𝑆 ∈ CRing ∧ 𝑅 ∈ (SubRing‘𝑆)) → ((1o evalSub 𝑆)‘𝑅) ∈ ((1o mPoly 𝑈) RingHom (𝑆s (𝐵m 1o))))
101, 2, 3, 9mp3an2i 1463 . . . . 5 (𝜑 → ((1o evalSub 𝑆)‘𝑅) ∈ ((1o mPoly 𝑈) RingHom (𝑆s (𝐵m 1o))))
11 eqid 2728 . . . . . 6 (Base‘(1o mPoly 𝑈)) = (Base‘(1o mPoly 𝑈))
12 eqid 2728 . . . . . 6 (Base‘(𝑆s (𝐵m 1o))) = (Base‘(𝑆s (𝐵m 1o)))
1311, 12rhmf 20417 . . . . 5 (((1o evalSub 𝑆)‘𝑅) ∈ ((1o mPoly 𝑈) RingHom (𝑆s (𝐵m 1o))) → ((1o evalSub 𝑆)‘𝑅):(Base‘(1o mPoly 𝑈))⟶(Base‘(𝑆s (𝐵m 1o))))
1410, 13syl 17 . . . 4 (𝜑 → ((1o evalSub 𝑆)‘𝑅):(Base‘(1o mPoly 𝑈))⟶(Base‘(𝑆s (𝐵m 1o))))
15 evls1sca.a . . . . . . 7 𝐴 = (algSc‘𝑊)
16 eqid 2728 . . . . . . 7 (Scalar‘𝑊) = (Scalar‘𝑊)
176subrgring 20506 . . . . . . . . 9 (𝑅 ∈ (SubRing‘𝑆) → 𝑈 ∈ Ring)
183, 17syl 17 . . . . . . . 8 (𝜑𝑈 ∈ Ring)
19 evls1sca.w . . . . . . . . 9 𝑊 = (Poly1𝑈)
2019ply1ring 22159 . . . . . . . 8 (𝑈 ∈ Ring → 𝑊 ∈ Ring)
2118, 20syl 17 . . . . . . 7 (𝜑𝑊 ∈ Ring)
2219ply1lmod 22163 . . . . . . . 8 (𝑈 ∈ Ring → 𝑊 ∈ LMod)
2318, 22syl 17 . . . . . . 7 (𝜑𝑊 ∈ LMod)
24 eqid 2728 . . . . . . 7 (Base‘(Scalar‘𝑊)) = (Base‘(Scalar‘𝑊))
25 eqid 2728 . . . . . . 7 (Base‘𝑊) = (Base‘𝑊)
2615, 16, 21, 23, 24, 25asclf 21808 . . . . . 6 (𝜑𝐴:(Base‘(Scalar‘𝑊))⟶(Base‘𝑊))
278subrgss 20504 . . . . . . . . . 10 (𝑅 ∈ (SubRing‘𝑆) → 𝑅𝐵)
283, 27syl 17 . . . . . . . . 9 (𝜑𝑅𝐵)
296, 8ressbas2 17211 . . . . . . . . 9 (𝑅𝐵𝑅 = (Base‘𝑈))
3028, 29syl 17 . . . . . . . 8 (𝜑𝑅 = (Base‘𝑈))
3119ply1sca 22164 . . . . . . . . . 10 (𝑈 ∈ Ring → 𝑈 = (Scalar‘𝑊))
3218, 31syl 17 . . . . . . . . 9 (𝜑𝑈 = (Scalar‘𝑊))
3332fveq2d 6895 . . . . . . . 8 (𝜑 → (Base‘𝑈) = (Base‘(Scalar‘𝑊)))
3430, 33eqtrd 2768 . . . . . . 7 (𝜑𝑅 = (Base‘(Scalar‘𝑊)))
35 eqid 2728 . . . . . . . . . 10 (PwSer1𝑈) = (PwSer1𝑈)
3619, 35, 25ply1bas 22107 . . . . . . . . 9 (Base‘𝑊) = (Base‘(1o mPoly 𝑈))
3736a1i 11 . . . . . . . 8 (𝜑 → (Base‘𝑊) = (Base‘(1o mPoly 𝑈)))
3837eqcomd 2734 . . . . . . 7 (𝜑 → (Base‘(1o mPoly 𝑈)) = (Base‘𝑊))
3934, 38feq23d 6711 . . . . . 6 (𝜑 → (𝐴:𝑅⟶(Base‘(1o mPoly 𝑈)) ↔ 𝐴:(Base‘(Scalar‘𝑊))⟶(Base‘𝑊)))
4026, 39mpbird 257 . . . . 5 (𝜑𝐴:𝑅⟶(Base‘(1o mPoly 𝑈)))
41 evls1sca.x . . . . 5 (𝜑𝑋𝑅)
4240, 41ffvelcdmd 7089 . . . 4 (𝜑 → (𝐴𝑋) ∈ (Base‘(1o mPoly 𝑈)))
43 fvco3 6991 . . . 4 ((((1o evalSub 𝑆)‘𝑅):(Base‘(1o mPoly 𝑈))⟶(Base‘(𝑆s (𝐵m 1o))) ∧ (𝐴𝑋) ∈ (Base‘(1o mPoly 𝑈))) → (((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅))‘(𝐴𝑋)) = ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘(((1o evalSub 𝑆)‘𝑅)‘(𝐴𝑋))))
4414, 42, 43syl2anc 583 . . 3 (𝜑 → (((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅))‘(𝐴𝑋)) = ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘(((1o evalSub 𝑆)‘𝑅)‘(𝐴𝑋))))
4515a1i 11 . . . . . . . 8 (𝜑𝐴 = (algSc‘𝑊))
46 eqid 2728 . . . . . . . . 9 (algSc‘𝑊) = (algSc‘𝑊)
4719, 46ply1ascl 22170 . . . . . . . 8 (algSc‘𝑊) = (algSc‘(1o mPoly 𝑈))
4845, 47eqtrdi 2784 . . . . . . 7 (𝜑𝐴 = (algSc‘(1o mPoly 𝑈)))
4948fveq1d 6893 . . . . . 6 (𝜑 → (𝐴𝑋) = ((algSc‘(1o mPoly 𝑈))‘𝑋))
5049fveq2d 6895 . . . . 5 (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(𝐴𝑋)) = (((1o evalSub 𝑆)‘𝑅)‘((algSc‘(1o mPoly 𝑈))‘𝑋)))
51 eqid 2728 . . . . . 6 (algSc‘(1o mPoly 𝑈)) = (algSc‘(1o mPoly 𝑈))
521a1i 11 . . . . . 6 (𝜑 → 1o ∈ On)
534, 5, 6, 8, 51, 52, 2, 3, 41evlssca 22028 . . . . 5 (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘((algSc‘(1o mPoly 𝑈))‘𝑋)) = ((𝐵m 1o) × {𝑋}))
5450, 53eqtrd 2768 . . . 4 (𝜑 → (((1o evalSub 𝑆)‘𝑅)‘(𝐴𝑋)) = ((𝐵m 1o) × {𝑋}))
5554fveq2d 6895 . . 3 (𝜑 → ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘(((1o evalSub 𝑆)‘𝑅)‘(𝐴𝑋))) = ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘((𝐵m 1o) × {𝑋})))
56 eqidd 2729 . . . . 5 (𝜑 → (𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) = (𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))))
57 coeq1 5854 . . . . . 6 (𝑥 = ((𝐵m 1o) × {𝑋}) → (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))) = (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))
5857adantl 481 . . . . 5 ((𝜑𝑥 = ((𝐵m 1o) × {𝑋})) → (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))) = (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))
5928, 41sseldd 3979 . . . . . . 7 (𝜑𝑋𝐵)
60 fconst6g 6780 . . . . . . 7 (𝑋𝐵 → ((𝐵m 1o) × {𝑋}):(𝐵m 1o)⟶𝐵)
6159, 60syl 17 . . . . . 6 (𝜑 → ((𝐵m 1o) × {𝑋}):(𝐵m 1o)⟶𝐵)
628fvexi 6905 . . . . . . . 8 𝐵 ∈ V
6362a1i 11 . . . . . . 7 (𝜑𝐵 ∈ V)
64 ovex 7447 . . . . . . . 8 (𝐵m 1o) ∈ V
6564a1i 11 . . . . . . 7 (𝜑 → (𝐵m 1o) ∈ V)
6663, 65elmapd 8852 . . . . . 6 (𝜑 → (((𝐵m 1o) × {𝑋}) ∈ (𝐵m (𝐵m 1o)) ↔ ((𝐵m 1o) × {𝑋}):(𝐵m 1o)⟶𝐵))
6761, 66mpbird 257 . . . . 5 (𝜑 → ((𝐵m 1o) × {𝑋}) ∈ (𝐵m (𝐵m 1o)))
68 snex 5427 . . . . . . . 8 {𝑋} ∈ V
6964, 68xpex 7749 . . . . . . 7 ((𝐵m 1o) × {𝑋}) ∈ V
7069a1i 11 . . . . . 6 (𝜑 → ((𝐵m 1o) × {𝑋}) ∈ V)
7163mptexd 7230 . . . . . 6 (𝜑 → (𝑦𝐵 ↦ (1o × {𝑦})) ∈ V)
72 coexg 7931 . . . . . 6 ((((𝐵m 1o) × {𝑋}) ∈ V ∧ (𝑦𝐵 ↦ (1o × {𝑦})) ∈ V) → (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))) ∈ V)
7370, 71, 72syl2anc 583 . . . . 5 (𝜑 → (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))) ∈ V)
7456, 58, 67, 73fvmptd 7006 . . . 4 (𝜑 → ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘((𝐵m 1o) × {𝑋})) = (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))
75 fconst6g 6780 . . . . . . 7 (𝑦𝐵 → (1o × {𝑦}):1o𝐵)
7675adantl 481 . . . . . 6 ((𝜑𝑦𝐵) → (1o × {𝑦}):1o𝐵)
7762, 1pm3.2i 470 . . . . . . . 8 (𝐵 ∈ V ∧ 1o ∈ On)
7877a1i 11 . . . . . . 7 ((𝜑𝑦𝐵) → (𝐵 ∈ V ∧ 1o ∈ On))
79 elmapg 8851 . . . . . . 7 ((𝐵 ∈ V ∧ 1o ∈ On) → ((1o × {𝑦}) ∈ (𝐵m 1o) ↔ (1o × {𝑦}):1o𝐵))
8078, 79syl 17 . . . . . 6 ((𝜑𝑦𝐵) → ((1o × {𝑦}) ∈ (𝐵m 1o) ↔ (1o × {𝑦}):1o𝐵))
8176, 80mpbird 257 . . . . 5 ((𝜑𝑦𝐵) → (1o × {𝑦}) ∈ (𝐵m 1o))
82 eqidd 2729 . . . . 5 (𝜑 → (𝑦𝐵 ↦ (1o × {𝑦})) = (𝑦𝐵 ↦ (1o × {𝑦})))
83 fconstmpt 5734 . . . . . 6 ((𝐵m 1o) × {𝑋}) = (𝑧 ∈ (𝐵m 1o) ↦ 𝑋)
8483a1i 11 . . . . 5 (𝜑 → ((𝐵m 1o) × {𝑋}) = (𝑧 ∈ (𝐵m 1o) ↦ 𝑋))
85 eqidd 2729 . . . . 5 (𝑧 = (1o × {𝑦}) → 𝑋 = 𝑋)
8681, 82, 84, 85fmptco 7132 . . . 4 (𝜑 → (((𝐵m 1o) × {𝑋}) ∘ (𝑦𝐵 ↦ (1o × {𝑦}))) = (𝑦𝐵𝑋))
8774, 86eqtrd 2768 . . 3 (𝜑 → ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦}))))‘((𝐵m 1o) × {𝑋})) = (𝑦𝐵𝑋))
8844, 55, 873eqtrd 2772 . 2 (𝜑 → (((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅))‘(𝐴𝑋)) = (𝑦𝐵𝑋))
89 elpwg 4601 . . . . . 6 (𝑅 ∈ (SubRing‘𝑆) → (𝑅 ∈ 𝒫 𝐵𝑅𝐵))
9027, 89mpbird 257 . . . . 5 (𝑅 ∈ (SubRing‘𝑆) → 𝑅 ∈ 𝒫 𝐵)
913, 90syl 17 . . . 4 (𝜑𝑅 ∈ 𝒫 𝐵)
92 evls1sca.q . . . . 5 𝑄 = (𝑆 evalSub1 𝑅)
93 eqid 2728 . . . . 5 (1o evalSub 𝑆) = (1o evalSub 𝑆)
9492, 93, 8evls1fval 22231 . . . 4 ((𝑆 ∈ CRing ∧ 𝑅 ∈ 𝒫 𝐵) → 𝑄 = ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅)))
952, 91, 94syl2anc 583 . . 3 (𝜑𝑄 = ((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅)))
9695fveq1d 6893 . 2 (𝜑 → (𝑄‘(𝐴𝑋)) = (((𝑥 ∈ (𝐵m (𝐵m 1o)) ↦ (𝑥 ∘ (𝑦𝐵 ↦ (1o × {𝑦})))) ∘ ((1o evalSub 𝑆)‘𝑅))‘(𝐴𝑋)))
97 fconstmpt 5734 . . 3 (𝐵 × {𝑋}) = (𝑦𝐵𝑋)
9897a1i 11 . 2 (𝜑 → (𝐵 × {𝑋}) = (𝑦𝐵𝑋))
9988, 96, 983eqtr4d 2778 1 (𝜑 → (𝑄‘(𝐴𝑋)) = (𝐵 × {𝑋}))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 395   = wceq 1534  wcel 2099  Vcvv 3470  wss 3945  𝒫 cpw 4598  {csn 4624  cmpt 5225   × cxp 5670  ccom 5676  Oncon0 6363  wf 6538  cfv 6542  (class class class)co 7414  1oc1o 8473  m cmap 8838  Basecbs 17173  s cress 17202  Scalarcsca 17229  s cpws 17421  Ringcrg 20166  CRingccrg 20167   RingHom crh 20401  SubRingcsubrg 20499  LModclmod 20736  algSccascl 21779   mPoly cmpl 21832   evalSub ces 22009  PwSer1cps1 22087  Poly1cpl1 22089   evalSub1 ces1 22225
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-10 2130  ax-11 2147  ax-12 2167  ax-ext 2699  ax-rep 5279  ax-sep 5293  ax-nul 5300  ax-pow 5359  ax-pr 5423  ax-un 7734  ax-cnex 11188  ax-resscn 11189  ax-1cn 11190  ax-icn 11191  ax-addcl 11192  ax-addrcl 11193  ax-mulcl 11194  ax-mulrcl 11195  ax-mulcom 11196  ax-addass 11197  ax-mulass 11198  ax-distr 11199  ax-i2m1 11200  ax-1ne0 11201  ax-1rid 11202  ax-rnegex 11203  ax-rrecex 11204  ax-cnre 11205  ax-pre-lttri 11206  ax-pre-lttrn 11207  ax-pre-ltadd 11208  ax-pre-mulgt0 11209
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3or 1086  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-nf 1779  df-sb 2061  df-mo 2530  df-eu 2559  df-clab 2706  df-cleq 2720  df-clel 2806  df-nfc 2881  df-ne 2937  df-nel 3043  df-ral 3058  df-rex 3067  df-rmo 3372  df-reu 3373  df-rab 3429  df-v 3472  df-sbc 3776  df-csb 3891  df-dif 3948  df-un 3950  df-in 3952  df-ss 3962  df-pss 3964  df-nul 4319  df-if 4525  df-pw 4600  df-sn 4625  df-pr 4627  df-tp 4629  df-op 4631  df-uni 4904  df-int 4945  df-iun 4993  df-iin 4994  df-br 5143  df-opab 5205  df-mpt 5226  df-tr 5260  df-id 5570  df-eprel 5576  df-po 5584  df-so 5585  df-fr 5627  df-se 5628  df-we 5629  df-xp 5678  df-rel 5679  df-cnv 5680  df-co 5681  df-dm 5682  df-rn 5683  df-res 5684  df-ima 5685  df-pred 6299  df-ord 6366  df-on 6367  df-lim 6368  df-suc 6369  df-iota 6494  df-fun 6544  df-fn 6545  df-f 6546  df-f1 6547  df-fo 6548  df-f1o 6549  df-fv 6550  df-isom 6551  df-riota 7370  df-ov 7417  df-oprab 7418  df-mpo 7419  df-of 7679  df-ofr 7680  df-om 7865  df-1st 7987  df-2nd 7988  df-supp 8160  df-frecs 8280  df-wrecs 8311  df-recs 8385  df-rdg 8424  df-1o 8480  df-er 8718  df-map 8840  df-pm 8841  df-ixp 8910  df-en 8958  df-dom 8959  df-sdom 8960  df-fin 8961  df-fsupp 9380  df-sup 9459  df-oi 9527  df-card 9956  df-pnf 11274  df-mnf 11275  df-xr 11276  df-ltxr 11277  df-le 11278  df-sub 11470  df-neg 11471  df-nn 12237  df-2 12299  df-3 12300  df-4 12301  df-5 12302  df-6 12303  df-7 12304  df-8 12305  df-9 12306  df-n0 12497  df-z 12583  df-dec 12702  df-uz 12847  df-fz 13511  df-fzo 13654  df-seq 13993  df-hash 14316  df-struct 17109  df-sets 17126  df-slot 17144  df-ndx 17156  df-base 17174  df-ress 17203  df-plusg 17239  df-mulr 17240  df-sca 17242  df-vsca 17243  df-ip 17244  df-tset 17245  df-ple 17246  df-ds 17248  df-hom 17250  df-cco 17251  df-0g 17416  df-gsum 17417  df-prds 17422  df-pws 17424  df-mre 17559  df-mrc 17560  df-acs 17562  df-mgm 18593  df-sgrp 18672  df-mnd 18688  df-mhm 18733  df-submnd 18734  df-grp 18886  df-minusg 18887  df-sbg 18888  df-mulg 19017  df-subg 19071  df-ghm 19161  df-cntz 19261  df-cmn 19730  df-abl 19731  df-mgp 20068  df-rng 20086  df-ur 20115  df-srg 20120  df-ring 20168  df-cring 20169  df-rhm 20404  df-subrng 20476  df-subrg 20501  df-lmod 20738  df-lss 20809  df-lsp 20849  df-assa 21780  df-asp 21781  df-ascl 21782  df-psr 21835  df-mvr 21836  df-mpl 21837  df-opsr 21839  df-evls 22011  df-psr1 22092  df-ply1 22094  df-evls1 22227
This theorem is referenced by:  evls1scasrng  22251  evls1scafv  33232  evls1maprnss  33365
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