Theorem dvply2g 23761

Description: The derivative of a polynomial with coefficients in a subring is a polynomial with coefficients in the same ring. (Contributed by Mario Carneiro, 1-Jan-2017.)

Assertion

Ref	Expression
dvply2g	⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (ℂ D 𝐹) ∈ (Poly‘𝑆))

Proof of Theorem dvply2g

Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		plyf 23675	. . . . . 6 ⊢ (𝐹 ∈ (Poly‘𝑆) → 𝐹:ℂ⟶ℂ)
2	1	adantl 480	. . . . 5 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → 𝐹:ℂ⟶ℂ)
3	2	feqmptd 6144	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → 𝐹 = (𝑎 ∈ ℂ ↦ (𝐹‘𝑎)))
4		simplr 787	. . . . . 6 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑎 ∈ ℂ) → 𝐹 ∈ (Poly‘𝑆))
5		dgrcl 23710	. . . . . . . . . 10 ⊢ (𝐹 ∈ (Poly‘𝑆) → (deg‘𝐹) ∈ ℕ0)
6	5	adantl 480	. . . . . . . . 9 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (deg‘𝐹) ∈ ℕ0)
7	6	nn0zd 11312	. . . . . . . 8 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (deg‘𝐹) ∈ ℤ)
8	7	adantr 479	. . . . . . 7 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑎 ∈ ℂ) → (deg‘𝐹) ∈ ℤ)
9		uzid 11534	. . . . . . 7 ⊢ ((deg‘𝐹) ∈ ℤ → (deg‘𝐹) ∈ (ℤ≥‘(deg‘𝐹)))
10		peano2uz 11573	. . . . . . 7 ⊢ ((deg‘𝐹) ∈ (ℤ≥‘(deg‘𝐹)) → ((deg‘𝐹) + 1) ∈ (ℤ≥‘(deg‘𝐹)))
11	8, 9, 10	3syl 18	. . . . . 6 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑎 ∈ ℂ) → ((deg‘𝐹) + 1) ∈ (ℤ≥‘(deg‘𝐹)))
12		simpr 475	. . . . . 6 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑎 ∈ ℂ) → 𝑎 ∈ ℂ)
13		eqid 2609	. . . . . . 7 ⊢ (coeff‘𝐹) = (coeff‘𝐹)
14		eqid 2609	. . . . . . 7 ⊢ (deg‘𝐹) = (deg‘𝐹)
15	13, 14	coeid3 23717	. . . . . 6 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ ((deg‘𝐹) + 1) ∈ (ℤ≥‘(deg‘𝐹)) ∧ 𝑎 ∈ ℂ) → (𝐹‘𝑎) = Σ𝑏 ∈ (0...((deg‘𝐹) + 1))(((coeff‘𝐹)‘𝑏) · (𝑎↑𝑏)))
16	4, 11, 12, 15	syl3anc 1317	. . . . 5 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑎 ∈ ℂ) → (𝐹‘𝑎) = Σ𝑏 ∈ (0...((deg‘𝐹) + 1))(((coeff‘𝐹)‘𝑏) · (𝑎↑𝑏)))
17	16	mpteq2dva 4666	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (𝑎 ∈ ℂ ↦ (𝐹‘𝑎)) = (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...((deg‘𝐹) + 1))(((coeff‘𝐹)‘𝑏) · (𝑎↑𝑏))))
18	3, 17	eqtrd 2643	. . 3 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → 𝐹 = (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...((deg‘𝐹) + 1))(((coeff‘𝐹)‘𝑏) · (𝑎↑𝑏))))
19	6	nn0cnd 11200	. . . . . . . 8 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (deg‘𝐹) ∈ ℂ)
20		ax-1cn 9850	. . . . . . . 8 ⊢ 1 ∈ ℂ
21		pncan 10138	. . . . . . . 8 ⊢ (((deg‘𝐹) ∈ ℂ ∧ 1 ∈ ℂ) → (((deg‘𝐹) + 1) − 1) = (deg‘𝐹))
22	19, 20, 21	sylancl 692	. . . . . . 7 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (((deg‘𝐹) + 1) − 1) = (deg‘𝐹))
23	22	eqcomd 2615	. . . . . 6 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (deg‘𝐹) = (((deg‘𝐹) + 1) − 1))
24	23	oveq2d 6543	. . . . 5 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (0...(deg‘𝐹)) = (0...(((deg‘𝐹) + 1) − 1)))
25	24	sumeq1d 14225	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → Σ𝑏 ∈ (0...(deg‘𝐹))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏)) = Σ𝑏 ∈ (0...(((deg‘𝐹) + 1) − 1))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏)))
26	25	mpteq2dv 4667	. . 3 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...(deg‘𝐹))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏))) = (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...(((deg‘𝐹) + 1) − 1))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏))))
27	13	coef3 23709	. . . 4 ⊢ (𝐹 ∈ (Poly‘𝑆) → (coeff‘𝐹):ℕ0⟶ℂ)
28	27	adantl 480	. . 3 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (coeff‘𝐹):ℕ0⟶ℂ)
29		oveq1 6534	. . . . 5 ⊢ (𝑐 = 𝑏 → (𝑐 + 1) = (𝑏 + 1))
30	29	fveq2d 6092	. . . . 5 ⊢ (𝑐 = 𝑏 → ((coeff‘𝐹)‘(𝑐 + 1)) = ((coeff‘𝐹)‘(𝑏 + 1)))
31	29, 30	oveq12d 6545	. . . 4 ⊢ (𝑐 = 𝑏 → ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))) = ((𝑏 + 1) · ((coeff‘𝐹)‘(𝑏 + 1))))
32	31	cbvmptv 4672	. . 3 ⊢ (𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1)))) = (𝑏 ∈ ℕ0 ↦ ((𝑏 + 1) · ((coeff‘𝐹)‘(𝑏 + 1))))
33		peano2nn0 11180	. . . 4 ⊢ ((deg‘𝐹) ∈ ℕ0 → ((deg‘𝐹) + 1) ∈ ℕ0)
34	6, 33	syl 17	. . 3 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → ((deg‘𝐹) + 1) ∈ ℕ0)
35	18, 26, 28, 32, 34	dvply1 23760	. 2 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (ℂ D 𝐹) = (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...(deg‘𝐹))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏))))
36		cnfldbas 19517	. . . . 5 ⊢ ℂ = (Base‘ℂfld)
37	36	subrgss 18550	. . . 4 ⊢ (𝑆 ∈ (SubRing‘ℂfld) → 𝑆 ⊆ ℂ)
38	37	adantr 479	. . 3 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → 𝑆 ⊆ ℂ)
39		elfznn0 12257	. . . 4 ⊢ (𝑏 ∈ (0...(deg‘𝐹)) → 𝑏 ∈ ℕ0)
40		simpll 785	. . . . . . 7 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → 𝑆 ∈ (SubRing‘ℂfld))
41		zsssubrg 19569	. . . . . . . . 9 ⊢ (𝑆 ∈ (SubRing‘ℂfld) → ℤ ⊆ 𝑆)
42	41	ad2antrr 757	. . . . . . . 8 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → ℤ ⊆ 𝑆)
43		peano2nn0 11180	. . . . . . . . . 10 ⊢ (𝑐 ∈ ℕ0 → (𝑐 + 1) ∈ ℕ0)
44	43	adantl 480	. . . . . . . . 9 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → (𝑐 + 1) ∈ ℕ0)
45	44	nn0zd 11312	. . . . . . . 8 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → (𝑐 + 1) ∈ ℤ)
46	42, 45	sseldd 3568	. . . . . . 7 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → (𝑐 + 1) ∈ 𝑆)
47		simplr 787	. . . . . . . . 9 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → 𝐹 ∈ (Poly‘𝑆))
48		subrgsubg 18555	. . . . . . . . . . 11 ⊢ (𝑆 ∈ (SubRing‘ℂfld) → 𝑆 ∈ (SubGrp‘ℂfld))
49		cnfld0 19535	. . . . . . . . . . . 12 ⊢ 0 = (0g‘ℂfld)
50	49	subg0cl 17371	. . . . . . . . . . 11 ⊢ (𝑆 ∈ (SubGrp‘ℂfld) → 0 ∈ 𝑆)
51	48, 50	syl 17	. . . . . . . . . 10 ⊢ (𝑆 ∈ (SubRing‘ℂfld) → 0 ∈ 𝑆)
52	51	ad2antrr 757	. . . . . . . . 9 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → 0 ∈ 𝑆)
53	13	coef2 23708	. . . . . . . . 9 ⊢ ((𝐹 ∈ (Poly‘𝑆) ∧ 0 ∈ 𝑆) → (coeff‘𝐹):ℕ0⟶𝑆)
54	47, 52, 53	syl2anc 690	. . . . . . . 8 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → (coeff‘𝐹):ℕ0⟶𝑆)
55	54, 44	ffvelrnd 6253	. . . . . . 7 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → ((coeff‘𝐹)‘(𝑐 + 1)) ∈ 𝑆)
56		cnfldmul 19519	. . . . . . . 8 ⊢ · = (.r‘ℂfld)
57	56	subrgmcl 18561	. . . . . . 7 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ (𝑐 + 1) ∈ 𝑆 ∧ ((coeff‘𝐹)‘(𝑐 + 1)) ∈ 𝑆) → ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))) ∈ 𝑆)
58	40, 46, 55, 57	syl3anc 1317	. . . . . 6 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑐 ∈ ℕ0) → ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))) ∈ 𝑆)
59		eqid 2609	. . . . . 6 ⊢ (𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1)))) = (𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))
60	58, 59	fmptd 6277	. . . . 5 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1)))):ℕ0⟶𝑆)
61	60	ffvelrnda 6252	. . . 4 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑏 ∈ ℕ0) → ((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) ∈ 𝑆)
62	39, 61	sylan2 489	. . 3 ⊢ (((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) ∧ 𝑏 ∈ (0...(deg‘𝐹))) → ((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) ∈ 𝑆)
63	38, 6, 62	elplyd 23679	. 2 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (𝑎 ∈ ℂ ↦ Σ𝑏 ∈ (0...(deg‘𝐹))(((𝑐 ∈ ℕ0 ↦ ((𝑐 + 1) · ((coeff‘𝐹)‘(𝑐 + 1))))‘𝑏) · (𝑎↑𝑏))) ∈ (Poly‘𝑆))
64	35, 63	eqeltrd 2687	1 ⊢ ((𝑆 ∈ (SubRing‘ℂfld) ∧ 𝐹 ∈ (Poly‘𝑆)) → (ℂ D 𝐹) ∈ (Poly‘𝑆))

Syntax hints:   → wi 4   ∧ wa 382   = wceq 1474   ∈ wcel 1976   ⊆ wss 3539   ↦ cmpt 4637  ⟶wf 5786  ‘cfv 5790  (class class class)co 6527  ℂcc 9790  0cc0 9792  1c1 9793   + caddc 9795   · cmul 9797   − cmin 10117  ℕ₀cn0 11139  ℤcz 11210  ℤ_≥cuz 11519  ...cfz 12152  ↑cexp 12677  Σcsu 14210  SubGrpcsubg 17357  SubRingcsubrg 18545  ℂ_fldccnfld 19513   D cdv 23350  Polycply 23661  coeffccoe 23663  degcdgr 23664

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1712  ax-4 1727  ax-5 1826  ax-6 1874  ax-7 1921  ax-8 1978  ax-9 1985  ax-10 2005  ax-11 2020  ax-12 2032  ax-13 2232  ax-ext 2589  ax-rep 4693  ax-sep 4703  ax-nul 4712  ax-pow 4764  ax-pr 4828  ax-un 6824  ax-inf2 8398  ax-cnex 9848  ax-resscn 9849  ax-1cn 9850  ax-icn 9851  ax-addcl 9852  ax-addrcl 9853  ax-mulcl 9854  ax-mulrcl 9855  ax-mulcom 9856  ax-addass 9857  ax-mulass 9858  ax-distr 9859  ax-i2m1 9860  ax-1ne0 9861  ax-1rid 9862  ax-rnegex 9863  ax-rrecex 9864  ax-cnre 9865  ax-pre-lttri 9866  ax-pre-lttrn 9867  ax-pre-ltadd 9868  ax-pre-mulgt0 9869  ax-pre-sup 9870  ax-addf 9871  ax-mulf 9872

This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  df-3or 1031  df-3an 1032  df-tru 1477  df-fal 1480  df-ex 1695  df-nf 1700  df-sb 1867  df-eu 2461  df-mo 2462  df-clab 2596  df-cleq 2602  df-clel 2605  df-nfc 2739  df-ne 2781  df-nel 2782  df-ral 2900  df-rex 2901  df-reu 2902  df-rmo 2903  df-rab 2904  df-v 3174  df-sbc 3402  df-csb 3499  df-dif 3542  df-un 3544  df-in 3546  df-ss 3553  df-pss 3555  df-nul 3874  df-if 4036  df-pw 4109  df-sn 4125  df-pr 4127  df-tp 4129  df-op 4131  df-uni 4367  df-int 4405  df-iun 4451  df-iin 4452  df-br 4578  df-opab 4638  df-mpt 4639  df-tr 4675  df-eprel 4939  df-id 4943  df-po 4949  df-so 4950  df-fr 4987  df-se 4988  df-we 4989  df-xp 5034  df-rel 5035  df-cnv 5036  df-co 5037  df-dm 5038  df-rn 5039  df-res 5040  df-ima 5041  df-pred 5583  df-ord 5629  df-on 5630  df-lim 5631  df-suc 5632  df-iota 5754  df-fun 5792  df-fn 5793  df-f 5794  df-f1 5795  df-fo 5796  df-f1o 5797  df-fv 5798  df-isom 5799  df-riota 6489  df-ov 6530  df-oprab 6531  df-mpt2 6532  df-of 6772  df-om 6935  df-1st 7036  df-2nd 7037  df-supp 7160  df-wrecs 7271  df-recs 7332  df-rdg 7370  df-1o 7424  df-2o 7425  df-oadd 7428  df-er 7606  df-map 7723  df-pm 7724  df-ixp 7772  df-en 7819  df-dom 7820  df-sdom 7821  df-fin 7822  df-fsupp 8136  df-fi 8177  df-sup 8208  df-inf 8209  df-oi 8275  df-card 8625  df-cda 8850  df-pnf 9932  df-mnf 9933  df-xr 9934  df-ltxr 9935  df-le 9936  df-sub 10119  df-neg 10120  df-div 10534  df-nn 10868  df-2 10926  df-3 10927  df-4 10928  df-5 10929  df-6 10930  df-7 10931  df-8 10932  df-9 10933  df-n0 11140  df-z 11211  df-dec 11326  df-uz 11520  df-q 11621  df-rp 11665  df-xneg 11778  df-xadd 11779  df-xmul 11780  df-icc 12009  df-fz 12153  df-fzo 12290  df-fl 12410  df-seq 12619  df-exp 12678  df-hash 12935  df-cj 13633  df-re 13634  df-im 13635  df-sqrt 13769  df-abs 13770  df-clim 14013  df-rlim 14014  df-sum 14211  df-struct 15643  df-ndx 15644  df-slot 15645  df-base 15646  df-sets 15647  df-ress 15648  df-plusg 15727  df-mulr 15728  df-starv 15729  df-sca 15730  df-vsca 15731  df-ip 15732  df-tset 15733  df-ple 15734  df-ds 15737  df-unif 15738  df-hom 15739  df-cco 15740  df-rest 15852  df-topn 15853  df-0g 15871  df-gsum 15872  df-topgen 15873  df-pt 15874  df-prds 15877  df-xrs 15931  df-qtop 15936  df-imas 15937  df-xps 15939  df-mre 16015  df-mrc 16016  df-acs 16018  df-mgm 17011  df-sgrp 17053  df-mnd 17064  df-submnd 17105  df-grp 17194  df-minusg 17195  df-mulg 17310  df-subg 17360  df-cntz 17519  df-cmn 17964  df-mgp 18259  df-ur 18271  df-ring 18318  df-cring 18319  df-subrg 18547  df-psmet 19505  df-xmet 19506  df-met 19507  df-bl 19508  df-mopn 19509  df-fbas 19510  df-fg 19511  df-cnfld 19514  df-top 20463  df-bases 20464  df-topon 20465  df-topsp 20466  df-cld 20575  df-ntr 20576  df-cls 20577  df-nei 20654  df-lp 20692  df-perf 20693  df-cn 20783  df-cnp 20784  df-haus 20871  df-tx 21117  df-hmeo 21310  df-fil 21402  df-fm 21494  df-flim 21495  df-flf 21496  df-xms 21876  df-ms 21877  df-tms 21878  df-cncf 22420  df-0p 23160  df-limc 23353  df-dv 23354  df-ply 23665  df-coe 23667  df-dgr 23668

This theorem is referenced by:  dvply2  23762  dvnply2  23763