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Theorem pf1mpf 21428
Description: Convert a univariate polynomial function to multivariate. (Contributed by Mario Carneiro, 12-Jun-2015.)
Hypotheses
Ref Expression
pf1rcl.q 𝑄 = ran (eval1𝑅)
pf1f.b 𝐵 = (Base‘𝑅)
mpfpf1.q 𝐸 = ran (1o eval 𝑅)
Assertion
Ref Expression
pf1mpf (𝐹𝑄 → (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸)
Distinct variable groups:   𝑥,𝐵   𝑥,𝐹   𝑥,𝑄   𝑥,𝑅
Allowed substitution hint:   𝐸(𝑥)

Proof of Theorem pf1mpf
Dummy variables 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 pf1rcl.q . . 3 𝑄 = ran (eval1𝑅)
21pf1rcl 21425 . 2 (𝐹𝑄𝑅 ∈ CRing)
3 id 22 . . . 4 (𝐹𝑄𝐹𝑄)
43, 1eleqtrdi 2849 . . 3 (𝐹𝑄𝐹 ∈ ran (eval1𝑅))
5 eqid 2738 . . . . . 6 (eval1𝑅) = (eval1𝑅)
6 eqid 2738 . . . . . 6 (Poly1𝑅) = (Poly1𝑅)
7 eqid 2738 . . . . . 6 (𝑅s 𝐵) = (𝑅s 𝐵)
8 pf1f.b . . . . . 6 𝐵 = (Base‘𝑅)
95, 6, 7, 8evl1rhm 21408 . . . . 5 (𝑅 ∈ CRing → (eval1𝑅) ∈ ((Poly1𝑅) RingHom (𝑅s 𝐵)))
102, 9syl 17 . . . 4 (𝐹𝑄 → (eval1𝑅) ∈ ((Poly1𝑅) RingHom (𝑅s 𝐵)))
11 eqid 2738 . . . . 5 (Base‘(Poly1𝑅)) = (Base‘(Poly1𝑅))
12 eqid 2738 . . . . 5 (Base‘(𝑅s 𝐵)) = (Base‘(𝑅s 𝐵))
1311, 12rhmf 19885 . . . 4 ((eval1𝑅) ∈ ((Poly1𝑅) RingHom (𝑅s 𝐵)) → (eval1𝑅):(Base‘(Poly1𝑅))⟶(Base‘(𝑅s 𝐵)))
14 ffn 6584 . . . 4 ((eval1𝑅):(Base‘(Poly1𝑅))⟶(Base‘(𝑅s 𝐵)) → (eval1𝑅) Fn (Base‘(Poly1𝑅)))
15 fvelrnb 6812 . . . 4 ((eval1𝑅) Fn (Base‘(Poly1𝑅)) → (𝐹 ∈ ran (eval1𝑅) ↔ ∃𝑦 ∈ (Base‘(Poly1𝑅))((eval1𝑅)‘𝑦) = 𝐹))
1610, 13, 14, 154syl 19 . . 3 (𝐹𝑄 → (𝐹 ∈ ran (eval1𝑅) ↔ ∃𝑦 ∈ (Base‘(Poly1𝑅))((eval1𝑅)‘𝑦) = 𝐹))
174, 16mpbid 231 . 2 (𝐹𝑄 → ∃𝑦 ∈ (Base‘(Poly1𝑅))((eval1𝑅)‘𝑦) = 𝐹)
18 eqid 2738 . . . . . . . 8 (1o eval 𝑅) = (1o eval 𝑅)
19 eqid 2738 . . . . . . . 8 (1o mPoly 𝑅) = (1o mPoly 𝑅)
20 eqid 2738 . . . . . . . . 9 (PwSer1𝑅) = (PwSer1𝑅)
216, 20, 11ply1bas 21276 . . . . . . . 8 (Base‘(Poly1𝑅)) = (Base‘(1o mPoly 𝑅))
225, 18, 8, 19, 21evl1val 21405 . . . . . . 7 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((eval1𝑅)‘𝑦) = (((1o eval 𝑅)‘𝑦) ∘ (𝑧𝐵 ↦ (1o × {𝑧}))))
2322coeq1d 5759 . . . . . 6 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((eval1𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ((((1o eval 𝑅)‘𝑦) ∘ (𝑧𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))))
24 coass 6158 . . . . . . 7 ((((1o eval 𝑅)‘𝑦) ∘ (𝑧𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = (((1o eval 𝑅)‘𝑦) ∘ ((𝑧𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))))
25 df1o2 8279 . . . . . . . . . . 11 1o = {∅}
268fvexi 6770 . . . . . . . . . . 11 𝐵 ∈ V
27 0ex 5226 . . . . . . . . . . 11 ∅ ∈ V
28 eqid 2738 . . . . . . . . . . 11 (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)) = (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))
2925, 26, 27, 28mapsncnv 8639 . . . . . . . . . 10 (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)) = (𝑧𝐵 ↦ (1o × {𝑧}))
3029coeq1i 5757 . . . . . . . . 9 ((𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ((𝑧𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)))
3125, 26, 27, 28mapsnf1o2 8640 . . . . . . . . . 10 (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)):(𝐵m 1o)–1-1-onto𝐵
32 f1ococnv1 6728 . . . . . . . . . 10 ((𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)):(𝐵m 1o)–1-1-onto𝐵 → ((𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵m 1o)))
3331, 32mp1i 13 . . . . . . . . 9 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵m 1o)))
3430, 33eqtr3id 2793 . . . . . . . 8 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((𝑧𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵m 1o)))
3534coeq2d 5760 . . . . . . 7 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((1o eval 𝑅)‘𝑦) ∘ ((𝑧𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅)))) = (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵m 1o))))
3624, 35eqtrid 2790 . . . . . 6 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((((1o eval 𝑅)‘𝑦) ∘ (𝑧𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵m 1o))))
37 eqid 2738 . . . . . . . 8 (𝑅s (𝐵m 1o)) = (𝑅s (𝐵m 1o))
38 eqid 2738 . . . . . . . 8 (Base‘(𝑅s (𝐵m 1o))) = (Base‘(𝑅s (𝐵m 1o)))
39 simpl 482 . . . . . . . 8 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → 𝑅 ∈ CRing)
40 ovexd 7290 . . . . . . . 8 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (𝐵m 1o) ∈ V)
41 1on 8274 . . . . . . . . . . 11 1o ∈ On
4218, 8, 19, 37evlrhm 21216 . . . . . . . . . . 11 ((1o ∈ On ∧ 𝑅 ∈ CRing) → (1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅s (𝐵m 1o))))
4341, 42mpan 686 . . . . . . . . . 10 (𝑅 ∈ CRing → (1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅s (𝐵m 1o))))
4421, 38rhmf 19885 . . . . . . . . . 10 ((1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅s (𝐵m 1o))) → (1o eval 𝑅):(Base‘(Poly1𝑅))⟶(Base‘(𝑅s (𝐵m 1o))))
4543, 44syl 17 . . . . . . . . 9 (𝑅 ∈ CRing → (1o eval 𝑅):(Base‘(Poly1𝑅))⟶(Base‘(𝑅s (𝐵m 1o))))
4645ffvelrnda 6943 . . . . . . . 8 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ (Base‘(𝑅s (𝐵m 1o))))
4737, 8, 38, 39, 40, 46pwselbas 17117 . . . . . . 7 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((1o eval 𝑅)‘𝑦):(𝐵m 1o)⟶𝐵)
48 fcoi1 6632 . . . . . . 7 (((1o eval 𝑅)‘𝑦):(𝐵m 1o)⟶𝐵 → (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵m 1o))) = ((1o eval 𝑅)‘𝑦))
4947, 48syl 17 . . . . . 6 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵m 1o))) = ((1o eval 𝑅)‘𝑦))
5023, 36, 493eqtrd 2782 . . . . 5 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((eval1𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = ((1o eval 𝑅)‘𝑦))
5145ffnd 6585 . . . . . . 7 (𝑅 ∈ CRing → (1o eval 𝑅) Fn (Base‘(Poly1𝑅)))
52 fnfvelrn 6940 . . . . . . 7 (((1o eval 𝑅) Fn (Base‘(Poly1𝑅)) ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ ran (1o eval 𝑅))
5351, 52sylan 579 . . . . . 6 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ ran (1o eval 𝑅))
54 mpfpf1.q . . . . . 6 𝐸 = ran (1o eval 𝑅)
5553, 54eleqtrrdi 2850 . . . . 5 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ 𝐸)
5650, 55eqeltrd 2839 . . . 4 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((eval1𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸)
57 coeq1 5755 . . . . 5 (((eval1𝑅)‘𝑦) = 𝐹 → (((eval1𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) = (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))))
5857eleq1d 2823 . . . 4 (((eval1𝑅)‘𝑦) = 𝐹 → ((((eval1𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸 ↔ (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
5956, 58syl5ibcom 244 . . 3 ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1𝑅))) → (((eval1𝑅)‘𝑦) = 𝐹 → (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
6059rexlimdva 3212 . 2 (𝑅 ∈ CRing → (∃𝑦 ∈ (Base‘(Poly1𝑅))((eval1𝑅)‘𝑦) = 𝐹 → (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
612, 17, 60sylc 65 1 (𝐹𝑄 → (𝐹 ∘ (𝑥 ∈ (𝐵m 1o) ↦ (𝑥‘∅))) ∈ 𝐸)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 395   = wceq 1539  wcel 2108  wrex 3064  Vcvv 3422  c0 4253  {csn 4558  cmpt 5153   I cid 5479   × cxp 5578  ccnv 5579  ran crn 5581  cres 5582  ccom 5584  Oncon0 6251   Fn wfn 6413  wf 6414  1-1-ontowf1o 6417  cfv 6418  (class class class)co 7255  1oc1o 8260  m cmap 8573  Basecbs 16840  s cpws 17074  CRingccrg 19699   RingHom crh 19871   mPoly cmpl 21019   eval cevl 21191  PwSer1cps1 21256  Poly1cpl1 21258  eval1ce1 21390
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566  ax-cnex 10858  ax-resscn 10859  ax-1cn 10860  ax-icn 10861  ax-addcl 10862  ax-addrcl 10863  ax-mulcl 10864  ax-mulrcl 10865  ax-mulcom 10866  ax-addass 10867  ax-mulass 10868  ax-distr 10869  ax-i2m1 10870  ax-1ne0 10871  ax-1rid 10872  ax-rnegex 10873  ax-rrecex 10874  ax-cnre 10875  ax-pre-lttri 10876  ax-pre-lttrn 10877  ax-pre-ltadd 10878  ax-pre-mulgt0 10879
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-nel 3049  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-iin 4924  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-se 5536  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-lim 6256  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-isom 6427  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-of 7511  df-ofr 7512  df-om 7688  df-1st 7804  df-2nd 7805  df-supp 7949  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-rdg 8212  df-1o 8267  df-er 8456  df-map 8575  df-pm 8576  df-ixp 8644  df-en 8692  df-dom 8693  df-sdom 8694  df-fin 8695  df-fsupp 9059  df-sup 9131  df-oi 9199  df-card 9628  df-pnf 10942  df-mnf 10943  df-xr 10944  df-ltxr 10945  df-le 10946  df-sub 11137  df-neg 11138  df-nn 11904  df-2 11966  df-3 11967  df-4 11968  df-5 11969  df-6 11970  df-7 11971  df-8 11972  df-9 11973  df-n0 12164  df-z 12250  df-dec 12367  df-uz 12512  df-fz 13169  df-fzo 13312  df-seq 13650  df-hash 13973  df-struct 16776  df-sets 16793  df-slot 16811  df-ndx 16823  df-base 16841  df-ress 16868  df-plusg 16901  df-mulr 16902  df-sca 16904  df-vsca 16905  df-ip 16906  df-tset 16907  df-ple 16908  df-ds 16910  df-hom 16912  df-cco 16913  df-0g 17069  df-gsum 17070  df-prds 17075  df-pws 17077  df-mre 17212  df-mrc 17213  df-acs 17215  df-mgm 18241  df-sgrp 18290  df-mnd 18301  df-mhm 18345  df-submnd 18346  df-grp 18495  df-minusg 18496  df-sbg 18497  df-mulg 18616  df-subg 18667  df-ghm 18747  df-cntz 18838  df-cmn 19303  df-abl 19304  df-mgp 19636  df-ur 19653  df-srg 19657  df-ring 19700  df-cring 19701  df-rnghom 19874  df-subrg 19937  df-lmod 20040  df-lss 20109  df-lsp 20149  df-assa 20970  df-asp 20971  df-ascl 20972  df-psr 21022  df-mvr 21023  df-mpl 21024  df-opsr 21026  df-evls 21192  df-evl 21193  df-psr1 21261  df-ply1 21263  df-evl1 21392
This theorem is referenced by:  pf1ind  21431
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