Theorem bpolysum 14784

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 473	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℕ0)
2		nn0uz 11722	. . . 4 ⊢ ℕ0 = (ℤ≥‘0)
3	1, 2	syl6eleq 2711	. . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ (ℤ≥‘0))
4		elfzelz 12342	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
5		bccl 13109	. . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑘 ∈ ℤ) → (𝑁C𝑘) ∈ ℕ0)
6	1, 4, 5	syl2an 494	. . . . 5 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℕ0)
7	6	nn0cnd 11353	. . . 4 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) ∈ ℂ)
8		elfznn0 12433	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ0)
9		simpr 477	. . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → 𝑋 ∈ ℂ)
10		bpolycl 14783	. . . . . 6 ⊢ ((𝑘 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑘 BernPoly 𝑋) ∈ ℂ)
11	8, 9, 10	syl2anr 495	. . . . 5 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑘 BernPoly 𝑋) ∈ ℂ)
12		fznn0sub 12373	. . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑁) → (𝑁 − 𝑘) ∈ ℕ0)
13	12	adantl 482	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → (𝑁 − 𝑘) ∈ ℕ0)
14		nn0p1nn 11332	. . . . . . 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 11036	. . . . 5 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ∈ ℂ)
17	15	nnne0d 11065	. . . . 5 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 𝑘) + 1) ≠ 0)
18	11, 16, 17	divcld 10801	. . . 4 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) ∈ ℂ)
19	7, 18	mulcld 10060	. . 3 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
20		oveq2 6658	. . . 4 ⊢ (𝑘 = 𝑁 → (𝑁C𝑘) = (𝑁C𝑁))
21		oveq1 6657	. . . . 5 ⊢ (𝑘 = 𝑁 → (𝑘 BernPoly 𝑋) = (𝑁 BernPoly 𝑋))
22		oveq2 6658	. . . . . 6 ⊢ (𝑘 = 𝑁 → (𝑁 − 𝑘) = (𝑁 − 𝑁))
23	22	oveq1d 6665	. . . . 5 ⊢ (𝑘 = 𝑁 → ((𝑁 − 𝑘) + 1) = ((𝑁 − 𝑁) + 1))
24	21, 23	oveq12d 6668	. . . 4 ⊢ (𝑘 = 𝑁 → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) = ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)))
25	20, 24	oveq12d 6668	. . 3 ⊢ (𝑘 = 𝑁 → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))))
26	3, 19, 25	fsumm1 14480	. 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 13099	. . . . . 6 ⊢ (𝑁 ∈ ℕ0 → (𝑁C𝑁) = 1)
28	27	adantr 481	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑁C𝑁) = 1)
29		nn0cn 11302	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ0 → 𝑁 ∈ ℂ)
30	29	adantr 481	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → 𝑁 ∈ ℂ)
31	30	subidd 10380	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑁 − 𝑁) = 0)
32	31	oveq1d 6665	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 − 𝑁) + 1) = (0 + 1))
33		0p1e1 11132	. . . . . . . 8 ⊢ (0 + 1) = 1
34	32, 33	syl6eq 2672	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 − 𝑁) + 1) = 1)
35	34	oveq2d 6666	. . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)) = ((𝑁 BernPoly 𝑋) / 1))
36		bpolycl 14783	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) ∈ ℂ)
37	36	div1d 10793	. . . . . 6 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / 1) = (𝑁 BernPoly 𝑋))
38	35, 37	eqtrd 2656	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1)) = (𝑁 BernPoly 𝑋))
39	28, 38	oveq12d 6668	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))) = (1 · (𝑁 BernPoly 𝑋)))
40	36	mulid2d 10058	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (1 · (𝑁 BernPoly 𝑋)) = (𝑁 BernPoly 𝑋))
41	39, 40	eqtrd 2656	. . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁C𝑁) · ((𝑁 BernPoly 𝑋) / ((𝑁 − 𝑁) + 1))) = (𝑁 BernPoly 𝑋))
42	41	oveq2d 6666	. 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 14780	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
44	43	eqcomd 2628	. . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))) = (𝑁 BernPoly 𝑋))
45		expcl 12878	. . . . 5 ⊢ ((𝑋 ∈ ℂ ∧ 𝑁 ∈ ℕ0) → (𝑋↑𝑁) ∈ ℂ)
46	45	ancoms 469	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (𝑋↑𝑁) ∈ ℂ)
47		fzfid 12772	. . . . 5 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ∈ Fin)
48		fzssp1 12384	. . . . . . . 8 ⊢ (0...(𝑁 − 1)) ⊆ (0...((𝑁 − 1) + 1))
49		ax-1cn 9994	. . . . . . . . . 10 ⊢ 1 ∈ ℂ
50		npcan 10290	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
51	30, 49, 50	sylancl 694	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → ((𝑁 − 1) + 1) = 𝑁)
52	51	oveq2d 6666	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (0...((𝑁 − 1) + 1)) = (0...𝑁))
53	48, 52	syl5sseq 3653	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → (0...(𝑁 − 1)) ⊆ (0...𝑁))
54	53	sselda 3603	. . . . . 6 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝑘 ∈ (0...𝑁))
55	54, 19	syldan 487	. . . . 5 ⊢ (((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
56	47, 55	fsumcl 14464	. . . 4 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) ∈ ℂ)
57	46, 56, 36	subaddd 10410	. . 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 222	. 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 2660	1 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...𝑁)((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = (𝑋↑𝑁))

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ‘cfv 5888  (class class class)co 6650  ℂcc 9934  0cc0 9936  1c1 9937   + caddc 9939   · cmul 9941   − cmin 10266   / cdiv 10684  ℕcn 11020  ℕ₀cn0 11292  ℤcz 11377  ℤ_≥cuz 11687  ...cfz 12326  ↑cexp 12860  Ccbc 13089  Σcsu 14416   BernPoly cbp 14777

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-inf2 8538  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-pre-sup 10014

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-se 5074  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-sup 8348  df-oi 8415  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-z 11378  df-uz 11688  df-rp 11833  df-fz 12327  df-fzo 12466  df-seq 12802  df-exp 12861  df-fac 13061  df-bc 13090  df-hash 13118  df-cj 13839  df-re 13840  df-im 13841  df-sqrt 13975  df-abs 13976  df-clim 14219  df-sum 14417  df-bpoly 14778

This theorem is referenced by: (None)