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Theorem bpolyval 15999

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 6898	. . . . . 6 ⊢ (♯‘dom 𝑐) ∈ V
2		oveq2 7413	. . . . . . 7 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑋↑𝑛) = (𝑋↑(♯‘dom 𝑐)))
3		oveq1 7412	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛C𝑚) = ((♯‘dom 𝑐)C𝑚))
4		oveq1 7412	. . . . . . . . . . 11 ⊢ (𝑛 = (♯‘dom 𝑐) → (𝑛 − 𝑚) = ((♯‘dom 𝑐) − 𝑚))
5	4	oveq1d 7420	. . . . . . . . . 10 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛 − 𝑚) + 1) = (((♯‘dom 𝑐) − 𝑚) + 1))
6	5	oveq2d 7421	. . . . . . . . 9 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1)))
7	3, 6	oveq12d 7423	. . . . . . . 8 ⊢ (𝑛 = (♯‘dom 𝑐) → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = (((♯‘dom 𝑐)C𝑚) · ((𝑐‘𝑚) / (((♯‘dom 𝑐) − 𝑚) + 1))))
8	7	sumeq2sdv 15656	. . . . . . 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 7423	. . . . . 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 3924	. . . . 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 7413	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → (𝑛C𝑚) = (𝑛C𝑘))
12		fveq2 6885	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → (𝑐‘𝑚) = (𝑐‘𝑘))
13		oveq2 7413	. . . . . . . . . . . 12 ⊢ (𝑚 = 𝑘 → (𝑛 − 𝑚) = (𝑛 − 𝑘))
14	13	oveq1d 7420	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑘 → ((𝑛 − 𝑚) + 1) = ((𝑛 − 𝑘) + 1))
15	12, 14	oveq12d 7423	. . . . . . . . . 10 ⊢ (𝑚 = 𝑘 → ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1)) = ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
16	11, 15	oveq12d 7423	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → ((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))))
17	16	cbvsumv 15648	. . . . . . . 8 ⊢ Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑐((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)))
18		dmeq 5897	. . . . . . . . 9 ⊢ (𝑐 = 𝑔 → dom 𝑐 = dom 𝑔)
19		fveq1 6884	. . . . . . . . . . . 12 ⊢ (𝑐 = 𝑔 → (𝑐‘𝑘) = (𝑔‘𝑘))
20	19	oveq1d 7420	. . . . . . . . . . 11 ⊢ (𝑐 = 𝑔 → ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1)) = ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))
21	20	oveq2d 7421	. . . . . . . . . 10 ⊢ (𝑐 = 𝑔 → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
22	21	adantr 480	. . . . . . . . 9 ⊢ ((𝑐 = 𝑔 ∧ 𝑘 ∈ dom 𝑐) → ((𝑛C𝑘) · ((𝑐‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
23	18, 22	sumeq12dv 15658	. . . . . . . 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 2778	. . . . . . 7 ⊢ (𝑐 = 𝑔 → Σ𝑚 ∈ dom 𝑐((𝑛C𝑚) · ((𝑐‘𝑚) / ((𝑛 − 𝑚) + 1))) = Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))
25	24	oveq2d 7421	. . . . . 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 3895	. . . . 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 2780	. . . 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 6889	. . . . 5 ⊢ (𝑐 = 𝑔 → (♯‘dom 𝑐) = (♯‘dom 𝑔))
29	28	csbeq1d 3892	. . . 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 2766	. . 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 5254	. 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 2726	. 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 15998	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 395 = wceq 1533 ∈ wcel 2098 Vcvv 3468 ⦋csb 3888 ↦ cmpt 5224 dom cdm 5669 ‘cfv 6537 (class class class)co 7405 wrecscwrecs 8297 ℂcc 11110 0cc0 11112 1c1 11113 + caddc 11115 · cmul 11117 < clt 11252 − cmin 11448 / cdiv 11875 ℕ₀cn0 12476 ...cfz 13490 ↑cexp 14032 Ccbc 14267 ♯chash 14295 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

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-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-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13491 df-seq 13973 df-hash 14296 df-sum 15639 df-bpoly 15997

This theorem is referenced by: bpoly0 16000 bpoly1 16001 bpolycl 16002 bpolysum 16003 bpolydiflem 16004 bpoly2 16007 bpoly3 16008 bpoly4 16009

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