cnsrplycl - Mathbox for Stefan O'Rear

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Theorem cnsrplycl 43151

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 21302	. . . . . . 7 ⊢ ℂ = (Base‘ℂ_fld)
4	3	subrgss 20494	. . . . . 6 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ⊆ ℂ)
5	2, 4	syl 17	. . . . 5 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
6		plyss 26139	. . . . 5 ⊢ ((𝐶 ⊆ 𝑆 ∧ 𝑆 ⊆ ℂ) → (Poly‘𝐶) ⊆ (Poly‘𝑆))
7	1, 5, 6	syl2anc 584	. . . 4 ⊢ (𝜑 → (Poly‘𝐶) ⊆ (Poly‘𝑆))
8		cnsrplycl.p	. . . 4 ⊢ (𝜑 → 𝑃 ∈ (Poly‘𝐶))
9	7, 8	sseldd 3944	. . 3 ⊢ (𝜑 → 𝑃 ∈ (Poly‘𝑆))
10		cnsrplycl.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑆)
11	5, 10	sseldd 3944	. . 3 ⊢ (𝜑 → 𝑋 ∈ ℂ)
12		eqid 2729	. . . 4 ⊢ (coeff‘𝑃) = (coeff‘𝑃)
13		eqid 2729	. . . 4 ⊢ (deg‘𝑃) = (deg‘𝑃)
14	12, 13	coeid2 26179	. . 3 ⊢ ((𝑃 ∈ (Poly‘𝑆) ∧ 𝑋 ∈ ℂ) → (𝑃‘𝑋) = Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)))
15	9, 11, 14	syl2anc 584	. 2 ⊢ (𝜑 → (𝑃‘𝑋) = Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)))
16		fzfid 13917	. . 3 ⊢ (𝜑 → (0...(deg‘𝑃)) ∈ Fin)
17	2	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑆 ∈ (SubRing‘ℂ_fld))
18		subrgsubg 20499	. . . . . . . 8 ⊢ (𝑆 ∈ (SubRing‘ℂ_fld) → 𝑆 ∈ (SubGrp‘ℂ_fld))
19		cnfld0 21336	. . . . . . . . 9 ⊢ 0 = (0_g‘ℂ_fld)
20	19	subg0cl 19050	. . . . . . . 8 ⊢ (𝑆 ∈ (SubGrp‘ℂ_fld) → 0 ∈ 𝑆)
21	2, 18, 20	3syl 18	. . . . . . 7 ⊢ (𝜑 → 0 ∈ 𝑆)
22	12	coef2 26171	. . . . . . 7 ⊢ ((𝑃 ∈ (Poly‘𝑆) ∧ 0 ∈ 𝑆) → (coeff‘𝑃):ℕ₀⟶𝑆)
23	9, 21, 22	syl2anc 584	. . . . . 6 ⊢ (𝜑 → (coeff‘𝑃):ℕ₀⟶𝑆)
24	23	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (coeff‘𝑃):ℕ₀⟶𝑆)
25		elfznn0 13560	. . . . . 6 ⊢ (𝑘 ∈ (0...(deg‘𝑃)) → 𝑘 ∈ ℕ₀)
26	25	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → 𝑘 ∈ ℕ₀)
27	24, 26	ffvelcdmd 7040	. . . 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 43149	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (𝑋↑𝑘) ∈ 𝑆)
30		cnfldmul 21306	. . . . 5 ⊢ · = (._r‘ℂ_fld)
31	30	subrgmcl 20506	. . . 4 ⊢ ((𝑆 ∈ (SubRing‘ℂ_fld) ∧ ((coeff‘𝑃)‘𝑘) ∈ 𝑆 ∧ (𝑋↑𝑘) ∈ 𝑆) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
32	17, 27, 29, 31	syl3anc 1373	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(deg‘𝑃))) → (((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
33	2, 16, 32	fsumcnsrcl 43150	. 2 ⊢ (𝜑 → Σ𝑘 ∈ (0...(deg‘𝑃))(((coeff‘𝑃)‘𝑘) · (𝑋↑𝑘)) ∈ 𝑆)
34	15, 33	eqeltrd 2828	1 ⊢ (𝜑 → (𝑃‘𝑋) ∈ 𝑆)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ⊆ wss 3911 ⟶wf 6496 ‘cfv 6500 (class class class)co 7370 ℂcc 11045 0cc0 11047 · cmul 11052 ℕ₀cn0 12421 ...cfz 13447 ↑cexp 14005 Σcsu 15630 SubGrpcsubg 19036 SubRingcsubrg 20491 ℂ_fldccnfld 21298 Polycply 26124 coeffccoe 26126 degcdgr 26127

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7692 ax-inf2 9573 ax-cnex 11103 ax-resscn 11104 ax-1cn 11105 ax-icn 11106 ax-addcl 11107 ax-addrcl 11108 ax-mulcl 11109 ax-mulrcl 11110 ax-mulcom 11111 ax-addass 11112 ax-mulass 11113 ax-distr 11114 ax-i2m1 11115 ax-1ne0 11116 ax-1rid 11117 ax-rnegex 11118 ax-rrecex 11119 ax-cnre 11120 ax-pre-lttri 11121 ax-pre-lttrn 11122 ax-pre-ltadd 11123 ax-pre-mulgt0 11124 ax-pre-sup 11125 ax-addf 11126 ax-mulf 11127

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6263 df-ord 6324 df-on 6325 df-lim 6326 df-suc 6327 df-iota 6453 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7327 df-ov 7373 df-oprab 7374 df-mpo 7375 df-of 7634 df-om 7824 df-1st 7948 df-2nd 7949 df-frecs 8238 df-wrecs 8269 df-recs 8318 df-rdg 8356 df-1o 8412 df-er 8649 df-map 8779 df-pm 8780 df-en 8897 df-dom 8898 df-sdom 8899 df-fin 8900 df-sup 9370 df-inf 9371 df-oi 9440 df-card 9871 df-pnf 11189 df-mnf 11190 df-xr 11191 df-ltxr 11192 df-le 11193 df-sub 11386 df-neg 11387 df-div 11815 df-nn 12166 df-2 12228 df-3 12229 df-4 12230 df-5 12231 df-6 12232 df-7 12233 df-8 12234 df-9 12235 df-n0 12422 df-z 12509 df-dec 12629 df-uz 12773 df-rp 12931 df-fz 13448 df-fzo 13595 df-fl 13733 df-seq 13946 df-exp 14006 df-hash 14275 df-cj 15043 df-re 15044 df-im 15045 df-sqrt 15179 df-abs 15180 df-clim 15432 df-rlim 15433 df-sum 15631 df-struct 17095 df-sets 17112 df-slot 17130 df-ndx 17142 df-base 17158 df-ress 17179 df-plusg 17211 df-mulr 17212 df-starv 17213 df-tset 17217 df-ple 17218 df-ds 17220 df-unif 17221 df-0g 17382 df-mgm 18551 df-sgrp 18630 df-mnd 18646 df-grp 18852 df-minusg 18853 df-subg 19039 df-cmn 19698 df-abl 19699 df-mgp 20063 df-rng 20075 df-ur 20104 df-ring 20157 df-cring 20158 df-subrng 20468 df-subrg 20492 df-cnfld 21299 df-0p 25606 df-ply 26128 df-coe 26130 df-dgr 26131

This theorem is referenced by: rngunsnply 43153

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