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Theorem bpolyval 15993

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 6905	. . . . . 6 ⊢ (♯‘dom 𝑐) ∈ V
2		oveq2 7417	. . . . . . 7 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑋↑𝑛) = (𝑋↑(♯‘dom 𝑐)))
3		oveq1 7416	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛C𝑚) = ((♯‘dom 𝑐)C𝑚))
4		oveq1 7416	. . . . . . . . . . 11 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛 − 𝑚) = ((♯‘dom 𝑐) − 𝑚))
5	4	oveq1d 7424	. . . . . . . . . 10 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛 − 𝑚) + 1) = (((♯‘dom 𝑐) − 𝑚) + 1))
6	5	oveq2d 7425	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))
7	3, 6	oveq12d 7427	. . . . . . . 8 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = (((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))
8	7	sumeq2sdv 15650	. . . . . . 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 7427	. . . . . 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 3930	. . . . 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 7417	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → (𝑛C𝑚) = (𝑛C𝑘))
12		fveq2 6892	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → (𝑐‘𝑚) = (𝑐‘𝑘))
13		oveq2 7417	. . . . . . . . . . . 12 ⊢ (𝑚 = 𝑘 → (𝑛 − 𝑚) = (𝑛 − 𝑘))
14	13	oveq1d 7424	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → ((𝑛 − 𝑚) + 1) = ((𝑛 − 𝑘) + 1))
15	12, 14	oveq12d 7427	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
16	11, 15	oveq12d 7427	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))))
17	16	cbvsumv 15642	. . . . . . . 8 ⊢ Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑐((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
18		dmeq 5904	. . . . . . . . 9 ⊢ (𝑐 = 𝑔 → dom 𝑐 = dom 𝑔)
19		fveq1 6891	. . . . . . . . . . . 12 ⊢ (𝑐 = 𝑔 → (𝑐‘𝑘) = (𝑔‘𝑘))
20	19	oveq1d 7424	. . . . . . . . . . 11 ⊢ (𝑐 = 𝑔 → ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)) = ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))
21	20	oveq2d 7425	. . . . . . . . . 10 ⊢ (𝑐 = 𝑔 → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
22	21	adantr 482	. . . . . . . . 9 ⊢ ((𝑐 = 𝑔 ∧ 𝑘 ∈ dom 𝑐) → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
23	18, 22	sumeq12dv 15652	. . . . . . . 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 2785	. . . . . . 7 ⊢ (𝑐 = 𝑔 → Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
25	24	oveq2d 7425	. . . . . 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 3901	. . . . 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 2787	. . . 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 6896	. . . . 5 ⊢ (𝑐 = 𝑔 → (♯‘dom 𝑐) = (♯‘dom 𝑔))
29	28	csbeq1d 3898	. . . 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 2773	. . 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 5262	. 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 2733	. 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 15992	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 397 = wceq 1542 ∈ wcel 2107 Vcvv 3475 ⦋csb 3894 ↦ cmpt 5232 dom cdm 5677 ‘cfv 6544 (class class class)co 7409 wrecscwrecs 8296 ℂcc 11108 0cc0 11110 1c1 11111 + caddc 11113 · cmul 11115 < clt 11248 − cmin 11444 / cdiv 11871 ℕ₀cn0 12472 ...cfz 13484 ↑cexp 14027 Ccbc 14262 ♯chash 14290 Σcsu 15632 BernPoly cbp 15990

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-n0 12473 df-z 12559 df-uz 12823 df-fz 13485 df-seq 13967 df-hash 14291 df-sum 15633 df-bpoly 15991

This theorem is referenced by: bpoly0 15994 bpoly1 15995 bpolycl 15996 bpolysum 15997 bpolydiflem 15998 bpoly2 16001 bpoly3 16002 bpoly4 16003

W3C validator