cnsrplycl - Mathbox for Stefan O'Rear

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Theorem cnsrplycl 43445

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 21317	. . . . . . 7 ⊢ ℂ = (Base‘ℂ_fld)
4	3	subrgss 20509	. . . . . 6 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ⊆ ℂ)
5	2, 4	syl 17	. . . . 5 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
6		plyss 26164	. . . . 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 3935	. . 3 ⊢ (𝜑 → 𝑃 ∈ (Poly‘𝑆))
10		cnsrplycl.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑆)
11	5, 10	sseldd 3935	. . 3 ⊢ (𝜑 → 𝑋 ∈ ℂ)
12		eqid 2737	. . . 4 ⊢ (coeff‘𝑃) = (coeff‘𝑃)
13		eqid 2737	. . . 4 ⊢ (deg‘𝑃) = (deg‘𝑃)
14	12, 13	coeid2 26204	. . 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 13900	. . 3 ⊢ (𝜑 → (0...(deg‘𝑃)) ∈ Fin)
17	2	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑆 ∈ (SubRing‘ℂ_fld))
18		subrgsubg 20514	. . . . . . . 8 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ∈ (SubGrp‘ℂ_fld))
19		cnfld0 21351	. . . . . . . . 9 ⊢ 0 = (0_g‘ℂ_fld)
20	19	subg0cl 19068	. . . . . . . 8 ⊢ (𝑆 ∈ (SubGrp‘ℂ_fld) → 0 ∈ 𝑆)
21	2, 18, 20	3syl 18	. . . . . . 7 ⊢ (𝜑 → 0 ∈ 𝑆)
22	12	coef2 26196	. . . . . . 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 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (coeff‘𝑃):ℕ₀⟶𝑆)
25		elfznn0 13540	. . . . . 6 ⊢ (𝑘 ∈ (0...(deg‘𝑃)) → 𝑘 ∈ ℕ₀)
26	25	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑘 ∈ ℕ₀)
27	24, 26	ffvelcdmd 7032	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → ((coeff‘𝑃)‘𝑘) ∈ 𝑆)
28	10	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑋 ∈ 𝑆)
29	17, 28, 26	cnsrexpcl 43443	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (𝑋↑𝑘) ∈ 𝑆)
30		cnfldmul 21321	. . . . 5 ⊢ · = (._r‘ℂ_fld)
31	30	subrgmcl 20521	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂ_fld) ∧ ((coeff‘𝑃)‘𝑘) ∈ 𝑆 ∧ (𝑋↑𝑘) ∈ 𝑆) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
32	17, 27, 29, 31	syl3anc 1374	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
33	2, 16, 32	fsumcnsrcl 43444	. 2 ⊢ (𝜑 → Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
34	15, 33	eqeltrd 2837	1 ⊢ (𝜑 → (𝑃‘𝑋) ∈ 𝑆)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ⊆ wss 3902 ⟶wf 6489 ‘cfv 6493 (class class class)co 7360 ℂcc 11028 0cc0 11030 · cmul 11035 ℕ₀cn0 12405 ...cfz 13427 ↑cexp 13988 Σcsu 15613 SubGrpcsubg 19054 SubRingcsubrg 20506 ℂ_fldccnfld 21313 Polycply 26149 coeffccoe 26151 degcdgr 26152

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-inf2 9554 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 ax-pre-sup 11108 ax-addf 11109 ax-mulf 11110

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-uni 4865 df-int 4904 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-of 7624 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-er 8637 df-map 8769 df-pm 8770 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-sup 9349 df-inf 9350 df-oi 9419 df-card 9855 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12150 df-2 12212 df-3 12213 df-4 12214 df-5 12215 df-6 12216 df-7 12217 df-8 12218 df-9 12219 df-n0 12406 df-z 12493 df-dec 12612 df-uz 12756 df-rp 12910 df-fz 13428 df-fzo 13575 df-fl 13716 df-seq 13929 df-exp 13989 df-hash 14258 df-cj 15026 df-re 15027 df-im 15028 df-sqrt 15162 df-abs 15163 df-clim 15415 df-rlim 15416 df-sum 15614 df-struct 17078 df-sets 17095 df-slot 17113 df-ndx 17125 df-base 17141 df-ress 17162 df-plusg 17194 df-mulr 17195 df-starv 17196 df-tset 17200 df-ple 17201 df-ds 17203 df-unif 17204 df-0g 17365 df-mgm 18569 df-sgrp 18648 df-mnd 18664 df-grp 18870 df-minusg 18871 df-subg 19057 df-cmn 19715 df-abl 19716 df-mgp 20080 df-rng 20092 df-ur 20121 df-ring 20174 df-cring 20175 df-subrng 20483 df-subrg 20507 df-cnfld 21314 df-0p 25631 df-ply 26153 df-coe 26155 df-dgr 26156

This theorem is referenced by: rngunsnply 43447

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