cnsrplycl - Mathbox for Stefan O'Rear

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Theorem cnsrplycl 41842

Description: Polynomials are closed in number rings. (Contributed by Stefan O'Rear, 30-Nov-2014.)

**Hypotheses**
Ref	Expression
cnsrplycl.s	⊢ (𝜑 → 𝑆 ∈ (SubRing‘ℂ_fld))
cnsrplycl.p	⊢ (𝜑 → 𝑃 ∈ (Poly‘𝐶))
cnsrplycl.x	⊢ (𝜑 → 𝑋 ∈ 𝑆)
cnsrplycl.c	⊢ (𝜑 → 𝐶 ⊆ 𝑆)

**Assertion**
Ref	Expression
cnsrplycl	⊢ (𝜑 → (𝑃‘𝑋) ∈ 𝑆)

Proof of Theorem cnsrplycl Dummy variable 𝑘 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnsrplycl.c	. . . . 5 ⊢ (𝜑 → 𝐶 ⊆ 𝑆)
2		cnsrplycl.s	. . . . . 6 ⊢ (𝜑 → 𝑆 ∈ (SubRing‘ℂ_fld))
3		cnfldbas 20933	. . . . . . 7 ⊢ ℂ = (Base‘ℂ_fld)
4	3	subrgss 20352	. . . . . 6 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ⊆ ℂ)
5	2, 4	syl 17	. . . . 5 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
6		plyss 25695	. . . . 5 ⊢ ((𝐶 ⊆ 𝑆 ∧ 𝑆 ⊆ ℂ) → (Poly‘𝐶) ⊆ (Poly‘𝑆))
7	1, 5, 6	syl2anc 585	. . . 4 ⊢ (𝜑 → (Poly‘𝐶) ⊆ (Poly‘𝑆))
8		cnsrplycl.p	. . . 4 ⊢ (𝜑 → 𝑃 ∈ (Poly‘𝐶))
9	7, 8	sseldd 3982	. . 3 ⊢ (𝜑 → 𝑃 ∈ (Poly‘𝑆))
10		cnsrplycl.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑆)
11	5, 10	sseldd 3982	. . 3 ⊢ (𝜑 → 𝑋 ∈ ℂ)
12		eqid 2733	. . . 4 ⊢ (coeff‘𝑃) = (coeff‘𝑃)
13		eqid 2733	. . . 4 ⊢ (deg‘𝑃) = (deg‘𝑃)
14	12, 13	coeid2 25735	. . 3 ⊢ ((𝑃 ∈ (Poly‘𝑆) ∧ 𝑋 ∈ ℂ) → (𝑃‘𝑋) = Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)))
15	9, 11, 14	syl2anc 585	. 2 ⊢ (𝜑 → (𝑃‘𝑋) = Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)))
16		fzfid 13934	. . 3 ⊢ (𝜑 → (0...(deg‘𝑃)) ∈ Fin)
17	2	adantr 482	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑆 ∈ (SubRing‘ℂ_fld))
18		subrgsubg 20357	. . . . . . . 8 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ∈ (SubGrp‘ℂ_fld))
19		cnfld0 20954	. . . . . . . . 9 ⊢ 0 = (0_g‘ℂ_fld)
20	19	subg0cl 19008	. . . . . . . 8 ⊢ (𝑆 ∈ (SubGrp‘ℂ_fld) → 0 ∈ 𝑆)
21	2, 18, 20	3syl 18	. . . . . . 7 ⊢ (𝜑 → 0 ∈ 𝑆)
22	12	coef2 25727	. . . . . . 7 ⊢ ((𝑃 ∈ (Poly‘𝑆) ∧ 0 ∈ 𝑆) → (coeff‘𝑃):ℕ₀⟶𝑆)
23	9, 21, 22	syl2anc 585	. . . . . 6 ⊢ (𝜑 → (coeff‘𝑃):ℕ₀⟶𝑆)
24	23	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (coeff‘𝑃):ℕ₀⟶𝑆)
25		elfznn0 13590	. . . . . 6 ⊢ (𝑘 ∈ (0...(deg‘𝑃)) → 𝑘 ∈ ℕ₀)
26	25	adantl 483	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑘 ∈ ℕ₀)
27	24, 26	ffvelcdmd 7083	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → ((coeff‘𝑃)‘𝑘) ∈ 𝑆)
28	10	adantr 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑋 ∈ 𝑆)
29	17, 28, 26	cnsrexpcl 41840	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (𝑋↑𝑘) ∈ 𝑆)
30		cnfldmul 20935	. . . . 5 ⊢ · = (._r‘ℂ_fld)
31	30	subrgmcl 20363	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂ_fld) ∧ ((coeff‘𝑃)‘𝑘) ∈ 𝑆 ∧ (𝑋↑𝑘) ∈ 𝑆) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
32	17, 27, 29, 31	syl3anc 1372	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
33	2, 16, 32	fsumcnsrcl 41841	. 2 ⊢ (𝜑 → Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
34	15, 33	eqeltrd 2834	1 ⊢ (𝜑 → (𝑃‘𝑋) ∈ 𝑆)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ⊆ wss 3947 ⟶wf 6536 ‘cfv 6540 (class class class)co 7404 ℂcc 11104 0cc0 11106 · cmul 11111 ℕ₀cn0 12468 ...cfz 13480 ↑cexp 14023 Σcsu 15628 SubGrpcsubg 18994 SubRingcsubrg 20347 ℂ_fldccnfld 20929 Polycply 25680 coeffccoe 25682 degcdgr 25683

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7720 ax-inf2 9632 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185 ax-mulf 11186

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-of 7665 df-om 7851 df-1st 7970 df-2nd 7971 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-1o 8461 df-er 8699 df-map 8818 df-pm 8819 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-sup 9433 df-inf 9434 df-oi 9501 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-rp 12971 df-fz 13481 df-fzo 13624 df-fl 13753 df-seq 13963 df-exp 14024 df-hash 14287 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-clim 15428 df-rlim 15429 df-sum 15629 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-0g 17383 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-grp 18818 df-subg 18997 df-cmn 19643 df-mgp 19980 df-ur 19997 df-ring 20049 df-cring 20050 df-subrg 20349 df-cnfld 20930 df-0p 25169 df-ply 25684 df-coe 25686 df-dgr 25687

This theorem is referenced by: rngunsnply 41848

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