bpolysum - Metamath Proof Explorer

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Theorem bpolysum 15993

Description: A sum for Bernoulli polynomials. (Contributed by Scott Fenton, 16-May-2014.) (Proof shortened by Mario Carneiro, 22-May-2014.)

**Assertion**
Ref	Expression
bpolysum	⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = (𝑋↑𝑁))

Distinct variable groups: 𝑘,𝑁 𝑘,𝑋

**Proof of Theorem bpolysum**
Step	Hyp	Ref	Expression
1		simpl 483	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℕ₀)
2		nn0uz 12860	. . . 4 ⊢ ℕ₀ = (ℤ_≥‘0)
3	1, 2	eleqtrdi 2843	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ (ℤ_≥‘0))
4		elfzelz 13497	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
5		bccl 14278	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁C𝑘) ∈ ℕ₀)
6	1, 4, 5	syl2an 596	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℕ₀)
7	6	nn0cnd 12530	. . . 4 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℂ)
8		elfznn0 13590	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
9		simpr 485	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑋 ∈ ℂ)
10		bpolycl 15992	. . . . . 6 ⊢ ((𝑘 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑘 BernPoly 𝑋) ∈ ℂ)
11	8, 9, 10	syl2anr 597	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑘 BernPoly 𝑋) ∈ ℂ)
12		fznn0sub 13529	. . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁 − 𝑘) ∈ ℕ₀)
13	12	adantl 482	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁 − 𝑘) ∈ ℕ₀)
14		nn0p1nn 12507	. . . . . . 7 ⊢ ((𝑁 − 𝑘) ∈ ℕ₀ → ((𝑁 − 𝑘) + 1) ∈ ℕ)
15	13, 14	syl 17	. . . . . 6 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ∈ ℕ)
16	15	nncnd 12224	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ∈ ℂ)
17	15	nnne0d 12258	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ≠ 0)
18	11, 16, 17	divcld 11986	. . . 4 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) ∈ ℂ)
19	7, 18	mulcld 11230	. . 3 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
20		oveq2 7413	. . . 4 ⊢ (𝑘 = 𝑁 → (𝑁C𝑘) = (𝑁C𝑁))
21		oveq1 7412	. . . . 5 ⊢ (𝑘 = 𝑁 → (𝑘 BernPoly 𝑋) = (𝑁 BernPoly 𝑋))
22		oveq2 7413	. . . . . 6 ⊢ (𝑘 = 𝑁 → (𝑁 − 𝑘) = (𝑁 − 𝑁))
23	22	oveq1d 7420	. . . . 5 ⊢ (𝑘 = 𝑁 → ((𝑁 − 𝑘) + 1) = ((𝑁 − 𝑁) + 1))
24	21, 23	oveq12d 7423	. . . 4 ⊢ (𝑘 = 𝑁 → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) = ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)))
25	20, 24	oveq12d 7423	. . 3 ⊢ (𝑘 = 𝑁 → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))))
26	3, 19, 25	fsumm1 15693	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = (Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) + ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)))))
27		bcnn 14268	. . . . . 6 ⊢ (𝑁 ∈ ℕ₀ → (𝑁C𝑁) = 1)
28	27	adantr 481	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁C𝑁) = 1)
29		nn0cn 12478	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℂ)
30	29	adantr 481	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℂ)
31	30	subidd 11555	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 − 𝑁) = 0)
32	31	oveq1d 7420	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 − 𝑁) + 1) = (0 + 1))
33		0p1e1 12330	. . . . . . . 8 ⊢ (0 + 1) = 1
34	32, 33	eqtrdi 2788	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 − 𝑁) + 1) = 1)
35	34	oveq2d 7421	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)) = ((𝑁 BernPoly 𝑋) / 1))
36		bpolycl 15992	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) ∈ ℂ)
37	36	div1d 11978	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / 1) = (𝑁 BernPoly 𝑋))
38	35, 37	eqtrd 2772	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)) = (𝑁 BernPoly 𝑋))
39	28, 38	oveq12d 7423	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))) = (1 · (𝑁 BernPoly 𝑋)))
40	36	mullidd 11228	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (1 · (𝑁 BernPoly 𝑋)) = (𝑁 BernPoly 𝑋))
41	39, 40	eqtrd 2772	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))) = (𝑁 BernPoly 𝑋))
42	41	oveq2d 7421	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) + ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)))) = (Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) + (𝑁 BernPoly 𝑋)))
43		bpolyval 15989	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
44	43	eqcomd 2738	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))) = (𝑁 BernPoly 𝑋))
45		expcl 14041	. . . . 5 ⊢ ((𝑋 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝑋↑𝑁) ∈ ℂ)
46	45	ancoms 459	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑋↑𝑁) ∈ ℂ)
47		fzfid 13934	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ∈ Fin)
48		fzssp1 13540	. . . . . . . 8 ⊢ (0...(𝑁 − 1)) ⊆ (0...((𝑁 − 1) + 1))
49		ax-1cn 11164	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
50		npcan 11465	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
51	30, 49, 50	sylancl 586	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
52	51	oveq2d 7421	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (0...((𝑁 − 1) + 1)) = (0...𝑁))
53	48, 52	sseqtrid 4033	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ⊆ (0...𝑁))
54	53	sselda 3981	. . . . . 6 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝑘 ∈ (0...𝑁))
55	54, 19	syldan 591	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
56	47, 55	fsumcl 15675	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
57	46, 56, 36	subaddd 11585	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))) = (𝑁 BernPoly 𝑋) ↔ (Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) + (𝑁 BernPoly 𝑋)) = (𝑋↑𝑁)))
58	44, 57	mpbid 231	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) + (𝑁 BernPoly 𝑋)) = (𝑋↑𝑁))
59	26, 42, 58	3eqtrd 2776	1 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = (𝑋↑𝑁))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ‘cfv 6540 (class class class)co 7405 ℂcc 11104 0cc0 11106 1c1 11107 + caddc 11109 · cmul 11111 − cmin 11440 / cdiv 11867 ℕcn 12208 ℕ₀cn0 12468 ℤcz 12554 ℤ_≥cuz 12818 ...cfz 13480 ↑cexp 14023 Ccbc 14258 Σcsu 15628 BernPoly cbp 15986

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-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

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-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 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 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-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-rp 12971 df-fz 13481 df-fzo 13624 df-seq 13963 df-exp 14024 df-fac 14230 df-bc 14259 df-hash 14287 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-clim 15428 df-sum 15629 df-bpoly 15987

This theorem is referenced by: (None)

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