mplcoe2 - Metamath Proof Explorer

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Theorem mplcoe2 21587

Description: Decompose a monomial into a finite product of powers of variables. (The assumption that 𝑅 is a commutative ring is not strictly necessary, because the submonoid of monomials is in the center of the multiplicative monoid of polynomials, but it simplifies the proof.) (Contributed by Mario Carneiro, 10-Jan-2015.) (Proof shortened by AV, 18-Oct-2019.)

**Hypotheses**
Ref	Expression
mplcoe1.p	⊢ 𝑃 = (𝐼 mPoly 𝑅)
mplcoe1.d	⊢ 𝐷 = {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin}
mplcoe1.z	⊢ 0 = (0_g‘𝑅)
mplcoe1.o	⊢ 1 = (1_r‘𝑅)
mplcoe1.i	⊢ (𝜑 → 𝐼 ∈ 𝑊)
mplcoe2.g	⊢ 𝐺 = (mulGrp‘𝑃)
mplcoe2.m	⊢ ↑ = (._g‘𝐺)
mplcoe2.v	⊢ 𝑉 = (𝐼 mVar 𝑅)
mplcoe2.r	⊢ (𝜑 → 𝑅 ∈ CRing)
mplcoe2.y	⊢ (𝜑 → 𝑌 ∈ 𝐷)

**Assertion**
Ref	Expression
mplcoe2	⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ if(𝑦 = 𝑌, 1 , 0 )) = (𝐺 Σ_g (𝑘 ∈ 𝐼 ↦ ((𝑌‘𝑘) ↑ (𝑉‘𝑘)))))

Distinct variable groups: ↑ ,𝑘,𝑦 1 ,𝑘,𝑦 𝑘,𝐺 𝑓,𝑘,𝑦,𝐼 𝜑,𝑘,𝑦 𝑅,𝑓,𝑦 𝐷,𝑘,𝑦 𝑃,𝑘 𝑘,𝑉 0 ,𝑓,𝑘,𝑦 𝑓,𝑌,𝑘,𝑦 𝑘,𝑊,𝑦 𝑦,𝐺 𝑦,𝑉 𝑦, ↑ Allowed substitution hints: 𝜑(𝑓) 𝐷(𝑓) 𝑃(𝑦,𝑓) 𝑅(𝑘) 1 (𝑓) ↑ (𝑓) 𝐺(𝑓) 𝑉(𝑓) 𝑊(𝑓)

Proof of Theorem mplcoe2 Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		mplcoe1.p	. 2 ⊢ 𝑃 = (𝐼 mPoly 𝑅)
2		mplcoe1.d	. 2 ⊢ 𝐷 = {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin}
3		mplcoe1.z	. 2 ⊢ 0 = (0_g‘𝑅)
4		mplcoe1.o	. 2 ⊢ 1 = (1_r‘𝑅)
5		mplcoe1.i	. 2 ⊢ (𝜑 → 𝐼 ∈ 𝑊)
6		mplcoe2.g	. 2 ⊢ 𝐺 = (mulGrp‘𝑃)
7		mplcoe2.m	. 2 ⊢ ↑ = (._g‘𝐺)
8		mplcoe2.v	. 2 ⊢ 𝑉 = (𝐼 mVar 𝑅)
9		mplcoe2.r	. . 3 ⊢ (𝜑 → 𝑅 ∈ CRing)
10		crngring 20061	. . 3 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)
11	9, 10	syl 17	. 2 ⊢ (𝜑 → 𝑅 ∈ Ring)
12		mplcoe2.y	. 2 ⊢ (𝜑 → 𝑌 ∈ 𝐷)
13	1	mplcrng 21571	. . . . . 6 ⊢ ((𝐼 ∈ 𝑊 ∧ 𝑅 ∈ CRing) → 𝑃 ∈ CRing)
14	5, 9, 13	syl2anc 584	. . . . 5 ⊢ (𝜑 → 𝑃 ∈ CRing)
15	14	adantr 481	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → 𝑃 ∈ CRing)
16		eqid 2732	. . . . 5 ⊢ (Base‘𝑃) = (Base‘𝑃)
17	5	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → 𝐼 ∈ 𝑊)
18	11	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → 𝑅 ∈ Ring)
19		simprr 771	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → 𝑦 ∈ 𝐼)
20	1, 8, 16, 17, 18, 19	mvrcl 21542	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → (𝑉‘𝑦) ∈ (Base‘𝑃))
21		simprl 769	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → 𝑥 ∈ 𝐼)
22	1, 8, 16, 17, 18, 21	mvrcl 21542	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → (𝑉‘𝑥) ∈ (Base‘𝑃))
23		eqid 2732	. . . . . . 7 ⊢ (._r‘𝑃) = (._r‘𝑃)
24	6, 23	mgpplusg 19985	. . . . . 6 ⊢ (._r‘𝑃) = (+_g‘𝐺)
25	24	eqcomi 2741	. . . . 5 ⊢ (+_g‘𝐺) = (._r‘𝑃)
26	16, 25	crngcom 20067	. . . 4 ⊢ ((𝑃 ∈ CRing ∧ (𝑉‘𝑦) ∈ (Base‘𝑃) ∧ (𝑉‘𝑥) ∈ (Base‘𝑃)) → ((𝑉‘𝑦)(+_g‘𝐺)(𝑉‘𝑥)) = ((𝑉‘𝑥)(+_g‘𝐺)(𝑉‘𝑦)))
27	15, 20, 22, 26	syl3anc 1371	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐼 ∧ 𝑦 ∈ 𝐼)) → ((𝑉‘𝑦)(+_g‘𝐺)(𝑉‘𝑥)) = ((𝑉‘𝑥)(+_g‘𝐺)(𝑉‘𝑦)))
28	27	ralrimivva 3200	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐼 ∀𝑦 ∈ 𝐼 ((𝑉‘𝑦)(+_g‘𝐺)(𝑉‘𝑥)) = ((𝑉‘𝑥)(+_g‘𝐺)(𝑉‘𝑦)))
29	1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 28	mplcoe5 21586	1 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ if(𝑦 = 𝑌, 1 , 0 )) = (𝐺 Σ_g (𝑘 ∈ 𝐼 ↦ ((𝑌‘𝑘) ↑ (𝑉‘𝑘)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 {crab 3432 ifcif 4527 ↦ cmpt 5230 ^◡ccnv 5674 “ cima 5678 ‘cfv 6540 (class class class)co 7405 ↑_m cmap 8816 Fincfn 8935 ℕcn 12208 ℕ₀cn0 12468 Basecbs 17140 +_gcplusg 17193 ._rcmulr 17194 0_gc0g 17381 Σ_g cgsu 17382 ._gcmg 18944 mulGrpcmgp 19981 1_rcur 19998 Ringcrg 20049 CRingccrg 20050 mVar cmvr 21449 mPoly cmpl 21450

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 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

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 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-iin 4999 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 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-ofr 7667 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8699 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-sup 9433 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-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-fz 13481 df-fzo 13624 df-seq 13963 df-hash 14287 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-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-hom 17217 df-cco 17218 df-0g 17383 df-gsum 17384 df-prds 17389 df-pws 17391 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-submnd 18668 df-grp 18818 df-minusg 18819 df-mulg 18945 df-subg 18997 df-ghm 19084 df-cntz 19175 df-cmn 19644 df-abl 19645 df-mgp 19982 df-ur 19999 df-srg 20003 df-ring 20051 df-cring 20052 df-subrg 20353 df-psr 21453 df-mvr 21454 df-mpl 21455

This theorem is referenced by: mplbas2 21588 selvvvval 41154

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