Theorem pf1mpf 20076

Description: Convert a univariate polynomial function to multivariate. (Contributed by Mario Carneiro, 12-Jun-2015.)

Hypotheses

Ref	Expression
pf1rcl.q	⊢ 𝑄 = ran (eval1‘𝑅)
pf1f.b	⊢ 𝐵 = (Base‘𝑅)
mpfpf1.q	⊢ 𝐸 = ran (1o eval 𝑅)

Assertion

Ref	Expression
pf1mpf	⊢ (𝐹 ∈ 𝑄 → (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 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.

Step	Hyp	Ref	Expression
1		pf1rcl.q	. . 3 ⊢ 𝑄 = ran (eval1‘𝑅)
2	1	pf1rcl 20073	. 2 ⊢ (𝐹 ∈ 𝑄 → 𝑅 ∈ CRing)
3		id 22	. . . 4 ⊢ (𝐹 ∈ 𝑄 → 𝐹 ∈ 𝑄)
4	3, 1	syl6eleq 2916	. . 3 ⊢ (𝐹 ∈ 𝑄 → 𝐹 ∈ ran (eval1‘𝑅))
5		eqid 2825	. . . . . 6 ⊢ (eval1‘𝑅) = (eval1‘𝑅)
6		eqid 2825	. . . . . 6 ⊢ (Poly1‘𝑅) = (Poly1‘𝑅)
7		eqid 2825	. . . . . 6 ⊢ (𝑅 ↑s 𝐵) = (𝑅 ↑s 𝐵)
8		pf1f.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝑅)
9	5, 6, 7, 8	evl1rhm 20056	. . . . 5 ⊢ (𝑅 ∈ CRing → (eval1‘𝑅) ∈ ((Poly1‘𝑅) RingHom (𝑅 ↑s 𝐵)))
10	2, 9	syl 17	. . . 4 ⊢ (𝐹 ∈ 𝑄 → (eval1‘𝑅) ∈ ((Poly1‘𝑅) RingHom (𝑅 ↑s 𝐵)))
11		eqid 2825	. . . . 5 ⊢ (Base‘(Poly1‘𝑅)) = (Base‘(Poly1‘𝑅))
12		eqid 2825	. . . . 5 ⊢ (Base‘(𝑅 ↑s 𝐵)) = (Base‘(𝑅 ↑s 𝐵))
13	11, 12	rhmf 19082	. . . 4 ⊢ ((eval1‘𝑅) ∈ ((Poly1‘𝑅) RingHom (𝑅 ↑s 𝐵)) → (eval1‘𝑅):(Base‘(Poly1‘𝑅))⟶(Base‘(𝑅 ↑s 𝐵)))
14		ffn 6278	. . . 4 ⊢ ((eval1‘𝑅):(Base‘(Poly1‘𝑅))⟶(Base‘(𝑅 ↑s 𝐵)) → (eval1‘𝑅) Fn (Base‘(Poly1‘𝑅)))
15		fvelrnb 6490	. . . 4 ⊢ ((eval1‘𝑅) Fn (Base‘(Poly1‘𝑅)) → (𝐹 ∈ ran (eval1‘𝑅) ↔ ∃𝑦 ∈ (Base‘(Poly1‘𝑅))((eval1‘𝑅)‘𝑦) = 𝐹))
16	10, 13, 14, 15	4syl 19	. . 3 ⊢ (𝐹 ∈ 𝑄 → (𝐹 ∈ ran (eval1‘𝑅) ↔ ∃𝑦 ∈ (Base‘(Poly1‘𝑅))((eval1‘𝑅)‘𝑦) = 𝐹))
17	4, 16	mpbid 224	. 2 ⊢ (𝐹 ∈ 𝑄 → ∃𝑦 ∈ (Base‘(Poly1‘𝑅))((eval1‘𝑅)‘𝑦) = 𝐹)
18		eqid 2825	. . . . . . . 8 ⊢ (1o eval 𝑅) = (1o eval 𝑅)
19		eqid 2825	. . . . . . . 8 ⊢ (1o mPoly 𝑅) = (1o mPoly 𝑅)
20		eqid 2825	. . . . . . . . 9 ⊢ (PwSer1‘𝑅) = (PwSer1‘𝑅)
21	6, 20, 11	ply1bas 19925	. . . . . . . 8 ⊢ (Base‘(Poly1‘𝑅)) = (Base‘(1o mPoly 𝑅))
22	5, 18, 8, 19, 21	evl1val 20053	. . . . . . 7 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((eval1‘𝑅)‘𝑦) = (((1o eval 𝑅)‘𝑦) ∘ (𝑧 ∈ 𝐵 ↦ (1o × {𝑧}))))
23	22	coeq1d 5516	. . . . . 6 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((eval1‘𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ((((1o eval 𝑅)‘𝑦) ∘ (𝑧 ∈ 𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))))
24		coass 5895	. . . . . . 7 ⊢ ((((1o eval 𝑅)‘𝑦) ∘ (𝑧 ∈ 𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = (((1o eval 𝑅)‘𝑦) ∘ ((𝑧 ∈ 𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))))
25		df1o2 7839	. . . . . . . . . . 11 ⊢ 1o = {∅}
26	8	fvexi 6447	. . . . . . . . . . 11 ⊢ 𝐵 ∈ V
27		0ex 5014	. . . . . . . . . . 11 ⊢ ∅ ∈ V
28		eqid 2825	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)) = (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))
29	25, 26, 27, 28	mapsncnv 8171	. . . . . . . . . 10 ⊢ ◡(𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)) = (𝑧 ∈ 𝐵 ↦ (1o × {𝑧}))
30	29	coeq1i 5514	. . . . . . . . 9 ⊢ (◡(𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ((𝑧 ∈ 𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)))
31	25, 26, 27, 28	mapsnf1o2 8172	. . . . . . . . . 10 ⊢ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)):(𝐵 ↑𝑚 1o)–1-1-onto→𝐵
32		f1ococnv1 6406	. . . . . . . . . 10 ⊢ ((𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)):(𝐵 ↑𝑚 1o)–1-1-onto→𝐵 → (◡(𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵 ↑𝑚 1o)))
33	31, 32	mp1i 13	. . . . . . . . 9 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (◡(𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵 ↑𝑚 1o)))
34	30, 33	syl5eqr 2875	. . . . . . . 8 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((𝑧 ∈ 𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ( I ↾ (𝐵 ↑𝑚 1o)))
35	34	coeq2d 5517	. . . . . . 7 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((1o eval 𝑅)‘𝑦) ∘ ((𝑧 ∈ 𝐵 ↦ (1o × {𝑧})) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅)))) = (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵 ↑𝑚 1o))))
36	24, 35	syl5eq 2873	. . . . . 6 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((((1o eval 𝑅)‘𝑦) ∘ (𝑧 ∈ 𝐵 ↦ (1o × {𝑧}))) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵 ↑𝑚 1o))))
37		eqid 2825	. . . . . . . 8 ⊢ (𝑅 ↑s (𝐵 ↑𝑚 1o)) = (𝑅 ↑s (𝐵 ↑𝑚 1o))
38		eqid 2825	. . . . . . . 8 ⊢ (Base‘(𝑅 ↑s (𝐵 ↑𝑚 1o))) = (Base‘(𝑅 ↑s (𝐵 ↑𝑚 1o)))
39		simpl 476	. . . . . . . 8 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → 𝑅 ∈ CRing)
40		ovexd 6939	. . . . . . . 8 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (𝐵 ↑𝑚 1o) ∈ V)
41		1on 7833	. . . . . . . . . . 11 ⊢ 1o ∈ On
42	18, 8, 19, 37	evlrhm 19885	. . . . . . . . . . 11 ⊢ ((1o ∈ On ∧ 𝑅 ∈ CRing) → (1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅 ↑s (𝐵 ↑𝑚 1o))))
43	41, 42	mpan 681	. . . . . . . . . 10 ⊢ (𝑅 ∈ CRing → (1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅 ↑s (𝐵 ↑𝑚 1o))))
44	21, 38	rhmf 19082	. . . . . . . . . 10 ⊢ ((1o eval 𝑅) ∈ ((1o mPoly 𝑅) RingHom (𝑅 ↑s (𝐵 ↑𝑚 1o))) → (1o eval 𝑅):(Base‘(Poly1‘𝑅))⟶(Base‘(𝑅 ↑s (𝐵 ↑𝑚 1o))))
45	43, 44	syl 17	. . . . . . . . 9 ⊢ (𝑅 ∈ CRing → (1o eval 𝑅):(Base‘(Poly1‘𝑅))⟶(Base‘(𝑅 ↑s (𝐵 ↑𝑚 1o))))
46	45	ffvelrnda 6608	. . . . . . . 8 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ (Base‘(𝑅 ↑s (𝐵 ↑𝑚 1o))))
47	37, 8, 38, 39, 40, 46	pwselbas 16502	. . . . . . 7 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((1o eval 𝑅)‘𝑦):(𝐵 ↑𝑚 1o)⟶𝐵)
48		fcoi1 6315	. . . . . . 7 ⊢ (((1o eval 𝑅)‘𝑦):(𝐵 ↑𝑚 1o)⟶𝐵 → (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵 ↑𝑚 1o))) = ((1o eval 𝑅)‘𝑦))
49	47, 48	syl 17	. . . . . 6 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((1o eval 𝑅)‘𝑦) ∘ ( I ↾ (𝐵 ↑𝑚 1o))) = ((1o eval 𝑅)‘𝑦))
50	23, 36, 49	3eqtrd 2865	. . . . 5 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((eval1‘𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = ((1o eval 𝑅)‘𝑦))
51	45	ffnd 6279	. . . . . . 7 ⊢ (𝑅 ∈ CRing → (1o eval 𝑅) Fn (Base‘(Poly1‘𝑅)))
52		fnfvelrn 6605	. . . . . . 7 ⊢ (((1o eval 𝑅) Fn (Base‘(Poly1‘𝑅)) ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ ran (1o eval 𝑅))
53	51, 52	sylan 575	. . . . . 6 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ ran (1o eval 𝑅))
54		mpfpf1.q	. . . . . 6 ⊢ 𝐸 = ran (1o eval 𝑅)
55	53, 54	syl6eleqr 2917	. . . . 5 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → ((1o eval 𝑅)‘𝑦) ∈ 𝐸)
56	50, 55	eqeltrd 2906	. . . 4 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((eval1‘𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸)
57		coeq1 5512	. . . . 5 ⊢ (((eval1‘𝑅)‘𝑦) = 𝐹 → (((eval1‘𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) = (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))))
58	57	eleq1d 2891	. . . 4 ⊢ (((eval1‘𝑅)‘𝑦) = 𝐹 → ((((eval1‘𝑅)‘𝑦) ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸 ↔ (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
59	56, 58	syl5ibcom 237	. . 3 ⊢ ((𝑅 ∈ CRing ∧ 𝑦 ∈ (Base‘(Poly1‘𝑅))) → (((eval1‘𝑅)‘𝑦) = 𝐹 → (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
60	59	rexlimdva 3240	. 2 ⊢ (𝑅 ∈ CRing → (∃𝑦 ∈ (Base‘(Poly1‘𝑅))((eval1‘𝑅)‘𝑦) = 𝐹 → (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸))
61	2, 17, 60	sylc 65	1 ⊢ (𝐹 ∈ 𝑄 → (𝐹 ∘ (𝑥 ∈ (𝐵 ↑𝑚 1o) ↦ (𝑥‘∅))) ∈ 𝐸)

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 386   = wceq 1656   ∈ wcel 2164  ∃wrex 3118  Vcvv 3414  ∅c0 4144  {csn 4397   ↦ cmpt 4952   I cid 5249   × cxp 5340  ^◡ccnv 5341  ran crn 5343   ↾ cres 5344   ∘ ccom 5346  Oncon0 5963   Fn wfn 6118  ⟶wf 6119  –1-1-onto→wf1o 6122  ‘cfv 6123  (class class class)co 6905  1_oc1o 7819   ↑_𝑚 cmap 8122  Basecbs 16222   ↑_s cpws 16460  CRingccrg 18902   RingHom crh 19068   mPoly cmpl 19714   eval cevl 19865  PwSer₁cps1 19905  Poly₁cpl1 19907  eval₁ce1 20039

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-rep 4994  ax-sep 5005  ax-nul 5013  ax-pow 5065  ax-pr 5127  ax-un 7209  ax-inf2 8815  ax-cnex 10308  ax-resscn 10309  ax-1cn 10310  ax-icn 10311  ax-addcl 10312  ax-addrcl 10313  ax-mulcl 10314  ax-mulrcl 10315  ax-mulcom 10316  ax-addass 10317  ax-mulass 10318  ax-distr 10319  ax-i2m1 10320  ax-1ne0 10321  ax-1rid 10322  ax-rnegex 10323  ax-rrecex 10324  ax-cnre 10325  ax-pre-lttri 10326  ax-pre-lttrn 10327  ax-pre-ltadd 10328  ax-pre-mulgt0 10329

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3or 1112  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-nel 3103  df-ral 3122  df-rex 3123  df-reu 3124  df-rmo 3125  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-pss 3814  df-nul 4145  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-tp 4402  df-op 4404  df-uni 4659  df-int 4698  df-iun 4742  df-iin 4743  df-br 4874  df-opab 4936  df-mpt 4953  df-tr 4976  df-id 5250  df-eprel 5255  df-po 5263  df-so 5264  df-fr 5301  df-se 5302  df-we 5303  df-xp 5348  df-rel 5349  df-cnv 5350  df-co 5351  df-dm 5352  df-rn 5353  df-res 5354  df-ima 5355  df-pred 5920  df-ord 5966  df-on 5967  df-lim 5968  df-suc 5969  df-iota 6086  df-fun 6125  df-fn 6126  df-f 6127  df-f1 6128  df-fo 6129  df-f1o 6130  df-fv 6131  df-isom 6132  df-riota 6866  df-ov 6908  df-oprab 6909  df-mpt2 6910  df-of 7157  df-ofr 7158  df-om 7327  df-1st 7428  df-2nd 7429  df-supp 7560  df-wrecs 7672  df-recs 7734  df-rdg 7772  df-1o 7826  df-2o 7827  df-oadd 7830  df-er 8009  df-map 8124  df-pm 8125  df-ixp 8176  df-en 8223  df-dom 8224  df-sdom 8225  df-fin 8226  df-fsupp 8545  df-sup 8617  df-oi 8684  df-card 9078  df-pnf 10393  df-mnf 10394  df-xr 10395  df-ltxr 10396  df-le 10397  df-sub 10587  df-neg 10588  df-nn 11351  df-2 11414  df-3 11415  df-4 11416  df-5 11417  df-6 11418  df-7 11419  df-8 11420  df-9 11421  df-n0 11619  df-z 11705  df-dec 11822  df-uz 11969  df-fz 12620  df-fzo 12761  df-seq 13096  df-hash 13411  df-struct 16224  df-ndx 16225  df-slot 16226  df-base 16228  df-sets 16229  df-ress 16230  df-plusg 16318  df-mulr 16319  df-sca 16321  df-vsca 16322  df-ip 16323  df-tset 16324  df-ple 16325  df-ds 16327  df-hom 16329  df-cco 16330  df-0g 16455  df-gsum 16456  df-prds 16461  df-pws 16463  df-mre 16599  df-mrc 16600  df-acs 16602  df-mgm 17595  df-sgrp 17637  df-mnd 17648  df-mhm 17688  df-submnd 17689  df-grp 17779  df-minusg 17780  df-sbg 17781  df-mulg 17895  df-subg 17942  df-ghm 18009  df-cntz 18100  df-cmn 18548  df-abl 18549  df-mgp 18844  df-ur 18856  df-srg 18860  df-ring 18903  df-cring 18904  df-rnghom 19071  df-subrg 19134  df-lmod 19221  df-lss 19289  df-lsp 19331  df-assa 19673  df-asp 19674  df-ascl 19675  df-psr 19717  df-mvr 19718  df-mpl 19719  df-opsr 19721  df-evls 19866  df-evl 19867  df-psr1 19910  df-ply1 19912  df-evl1 20041

This theorem is referenced by:  pf1ind  20079