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Theorem bpolyval 15995

Description: The value of the Bernoulli polynomials. (Contributed by Scott Fenton, 16-May-2014.)

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

Distinct variable groups: 𝑘,𝑁 𝑘,𝑋

Proof of Theorem bpolyval Dummy variables 𝑔 𝑚 𝑛 𝑐 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fvex 6904	. . . . . 6 ⊢ (♯‘dom 𝑐) ∈ V
2		oveq2 7419	. . . . . . 7 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑋↑𝑛) = (𝑋↑(♯‘dom 𝑐)))
3		oveq1 7418	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛C𝑚) = ((♯‘dom 𝑐)C𝑚))
4		oveq1 7418	. . . . . . . . . . 11 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛 − 𝑚) = ((♯‘dom 𝑐) − 𝑚))
5	4	oveq1d 7426	. . . . . . . . . 10 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛 − 𝑚) + 1) = (((♯‘dom 𝑐) − 𝑚) + 1))
6	5	oveq2d 7427	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))
7	3, 6	oveq12d 7429	. . . . . . . 8 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = (((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))
8	7	sumeq2sdv 15652	. . . . . . 7 ⊢ (𝑛 = (♯‘dom 𝑐) → Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))
9	2, 8	oveq12d 7429	. . . . . 6 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑋↑𝑛) − Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)))) = ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))))
10	1, 9	csbie 3929	. . . . 5 ⊢ ⦋(♯‘dom 𝑐) / 𝑛⦌((𝑋↑𝑛) − Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)))) = ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))
11		oveq2 7419	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → (𝑛C𝑚) = (𝑛C𝑘))
12		fveq2 6891	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → (𝑐‘𝑚) = (𝑐‘𝑘))
13		oveq2 7419	. . . . . . . . . . . 12 ⊢ (𝑚 = 𝑘 → (𝑛 − 𝑚) = (𝑛 − 𝑘))
14	13	oveq1d 7426	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → ((𝑛 − 𝑚) + 1) = ((𝑛 − 𝑘) + 1))
15	12, 14	oveq12d 7429	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
16	11, 15	oveq12d 7429	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))))
17	16	cbvsumv 15644	. . . . . . . 8 ⊢ Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑐((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
18		dmeq 5903	. . . . . . . . 9 ⊢ (𝑐 = 𝑔 → dom 𝑐 = dom 𝑔)
19		fveq1 6890	. . . . . . . . . . . 12 ⊢ (𝑐 = 𝑔 → (𝑐‘𝑘) = (𝑔‘𝑘))
20	19	oveq1d 7426	. . . . . . . . . . 11 ⊢ (𝑐 = 𝑔 → ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)) = ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))
21	20	oveq2d 7427	. . . . . . . . . 10 ⊢ (𝑐 = 𝑔 → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
22	21	adantr 481	. . . . . . . . 9 ⊢ ((𝑐 = 𝑔 ∧ 𝑘 ∈ dom 𝑐) → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
23	18, 22	sumeq12dv 15654	. . . . . . . 8 ⊢ (𝑐 = 𝑔 → Σ𝑘 ∈ dom 𝑐((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
24	17, 23	eqtrid 2784	. . . . . . 7 ⊢ (𝑐 = 𝑔 → Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
25	24	oveq2d 7427	. . . . . 6 ⊢ (𝑐 = 𝑔 → ((𝑋↑𝑛) − Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)))) = ((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
26	25	csbeq2dv 3900	. . . . 5 ⊢ (𝑐 = 𝑔 → ⦋(♯‘dom 𝑐) / 𝑛⦌((𝑋↑𝑛) − Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)))) = ⦋(♯‘dom 𝑐) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
27	10, 26	eqtr3id 2786	. . . 4 ⊢ (𝑐 = 𝑔 → ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))) = ⦋(♯‘dom 𝑐) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
28	18	fveq2d 6895	. . . . 5 ⊢ (𝑐 = 𝑔 → (♯‘dom 𝑐) = (♯‘dom 𝑔))
29	28	csbeq1d 3897	. . . 4 ⊢ (𝑐 = 𝑔 → ⦋(♯‘dom 𝑐) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
30	27, 29	eqtrd 2772	. . 3 ⊢ (𝑐 = 𝑔 → ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))) = ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
31	30	cbvmptv 5261	. 2 ⊢ (𝑐 ∈ V ↦ ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))) = (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
32		eqid 2732	. 2 ⊢ wrecs( < , ℕ₀, (𝑐 ∈ V ↦ ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))))) = wrecs( < , ℕ₀, (𝑐 ∈ V ↦ ((𝑋↑(♯‘dom 𝑐)) − Σ𝑚 ∈ dom 𝑐(((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))))
33	31, 32	bpolylem 15994	1 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 Vcvv 3474 ⦋csb 3893 ↦ cmpt 5231 dom cdm 5676 ‘cfv 6543 (class class class)co 7411 wrecscwrecs 8298 ℂcc 11110 0cc0 11112 1c1 11113 + caddc 11115 · cmul 11117 < clt 11250 − cmin 11446 / cdiv 11873 ℕ₀cn0 12474 ...cfz 13486 ↑cexp 14029 Ccbc 14264 ♯chash 14292 Σcsu 15634 BernPoly cbp 15992

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 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 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

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-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936 df-pnf 11252 df-mnf 11253 df-xr 11254 df-ltxr 11255 df-le 11256 df-sub 11448 df-neg 11449 df-nn 12215 df-n0 12475 df-z 12561 df-uz 12825 df-fz 13487 df-seq 13969 df-hash 14293 df-sum 15635 df-bpoly 15993

This theorem is referenced by: bpoly0 15996 bpoly1 15997 bpolycl 15998 bpolysum 15999 bpolydiflem 16000 bpoly2 16003 bpoly3 16004 bpoly4 16005

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