bpolysum - Metamath Proof Explorer

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Theorem bpolysum 16003

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 482	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℕ₀)
2		nn0uz 12868	. . . 4 ⊢ ℕ₀ = (ℤ_≥‘0)
3	1, 2	eleqtrdi 2837	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ (ℤ_≥‘0))
4		elfzelz 13507	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
5		bccl 14287	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁C𝑘) ∈ ℕ₀)
6	1, 4, 5	syl2an 595	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℕ₀)
7	6	nn0cnd 12538	. . . 4 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℂ)
8		elfznn0 13600	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
9		simpr 484	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑋 ∈ ℂ)
10		bpolycl 16002	. . . . . 6 ⊢ ((𝑘 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑘 BernPoly 𝑋) ∈ ℂ)
11	8, 9, 10	syl2anr 596	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑘 BernPoly 𝑋) ∈ ℂ)
12		fznn0sub 13539	. . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁 − 𝑘) ∈ ℕ₀)
13	12	adantl 481	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁 − 𝑘) ∈ ℕ₀)
14		nn0p1nn 12515	. . . . . . 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 12232	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ∈ ℂ)
17	15	nnne0d 12266	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ≠ 0)
18	11, 16, 17	divcld 11994	. . . 4 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) ∈ ℂ)
19	7, 18	mulcld 11238	. . 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 15703	. 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 14277	. . . . . 6 ⊢ (𝑁 ∈ ℕ₀ → (𝑁C𝑁) = 1)
28	27	adantr 480	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁C𝑁) = 1)
29		nn0cn 12486	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℂ)
30	29	adantr 480	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℂ)
31	30	subidd 11563	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 − 𝑁) = 0)
32	31	oveq1d 7420	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 − 𝑁) + 1) = (0 + 1))
33		0p1e1 12338	. . . . . . . 8 ⊢ (0 + 1) = 1
34	32, 33	eqtrdi 2782	. . . . . . 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 16002	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) ∈ ℂ)
37	36	div1d 11986	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / 1) = (𝑁 BernPoly 𝑋))
38	35, 37	eqtrd 2766	. . . . 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 11236	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (1 · (𝑁 BernPoly 𝑋)) = (𝑁 BernPoly 𝑋))
41	39, 40	eqtrd 2766	. . 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 15999	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
44	43	eqcomd 2732	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))) = (𝑁 BernPoly 𝑋))
45		expcl 14050	. . . . 5 ⊢ ((𝑋 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝑋↑𝑁) ∈ ℂ)
46	45	ancoms 458	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑋↑𝑁) ∈ ℂ)
47		fzfid 13944	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ∈ Fin)
48		fzssp1 13550	. . . . . . . 8 ⊢ (0...(𝑁 − 1)) ⊆ (0...((𝑁 − 1) + 1))
49		ax-1cn 11170	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
50		npcan 11473	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
51	30, 49, 50	sylancl 585	. . . . . . . . 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 4029	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ⊆ (0...𝑁))
54	53	sselda 3977	. . . . . 6 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝑘 ∈ (0...𝑁))
55	54, 19	syldan 590	. . . . 5 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
56	47, 55	fsumcl 15685	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
57	46, 56, 36	subaddd 11593	. . 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 2770	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 395 = wceq 1533 ∈ wcel 2098 ‘cfv 6537 (class class class)co 7405 ℂcc 11110 0cc0 11112 1c1 11113 + caddc 11115 · cmul 11117 − cmin 11448 / cdiv 11875 ℕcn 12216 ℕ₀cn0 12476 ℤcz 12562 ℤ_≥cuz 12826 ...cfz 13490 ↑cexp 14032 Ccbc 14267 Σcsu 15638 BernPoly cbp 15996

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-sup 9439 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-rp 12981 df-fz 13491 df-fzo 13634 df-seq 13973 df-exp 14033 df-fac 14239 df-bc 14268 df-hash 14296 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15438 df-sum 15639 df-bpoly 15997

This theorem is referenced by: (None)

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