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Theorem bpolylem 15402

Description: Lemma for bpolyval 15403. (Contributed by Scott Fenton, 22-May-2014.) (Revised by Mario Carneiro, 23-Aug-2014.)

**Hypotheses**
Ref	Expression
bpoly.1	⊢ 𝐺 = (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
bpoly.2	⊢ 𝐹 = wrecs( < , ℕ₀, 𝐺)

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

Distinct variable groups: 𝑔,𝑘,𝑛,𝐹 𝑔,𝑁,𝑘,𝑛 𝑔,𝑋,𝑘,𝑛 Allowed substitution hints: 𝐺(𝑔,𝑘,𝑛)

Proof of Theorem bpolylem Dummy variables 𝑚 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq1 7163	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑋 → (𝑥↑𝑛) = (𝑋↑𝑛))
2	1	oveq1d 7171	. . . . . . . . . 10 ⊢ (𝑥 = 𝑋 → ((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
3	2	csbeq2dv 3890	. . . . . . . . 9 ⊢ (𝑥 = 𝑋 → ⦋(♯‘dom 𝑔) / 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)))))
4	3	mpteq2dv 5162	. . . . . . . 8 ⊢ (𝑥 = 𝑋 → (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))) = (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))))
5		bpoly.1	. . . . . . . 8 ⊢ 𝐺 = (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))
6	4, 5	syl6eqr 2874	. . . . . . 7 ⊢ (𝑥 = 𝑋 → (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))) = 𝐺)
7		wrecseq3 7952	. . . . . . 7 ⊢ ((𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))) = 𝐺 → wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))) = wrecs( < , ℕ₀, 𝐺))
8	6, 7	syl 17	. . . . . 6 ⊢ (𝑥 = 𝑋 → wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))) = wrecs( < , ℕ₀, 𝐺))
9		bpoly.2	. . . . . 6 ⊢ 𝐹 = wrecs( < , ℕ₀, 𝐺)
10	8, 9	syl6eqr 2874	. . . . 5 ⊢ (𝑥 = 𝑋 → wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))))) = 𝐹)
11	10	fveq1d 6672	. . . 4 ⊢ (𝑥 = 𝑋 → (wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))))‘𝑚) = (𝐹‘𝑚))
12		fveq2 6670	. . . 4 ⊢ (𝑚 = 𝑁 → (𝐹‘𝑚) = (𝐹‘𝑁))
13	11, 12	sylan9eqr 2878	. . 3 ⊢ ((𝑚 = 𝑁 ∧ 𝑥 = 𝑋) → (wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))))‘𝑚) = (𝐹‘𝑁))
14		df-bpoly 15401	. . 3 ⊢ BernPoly = (𝑚 ∈ ℕ₀, 𝑥 ∈ ℂ ↦ (wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))))‘𝑚))
15		fvex 6683	. . 3 ⊢ (𝐹‘𝑁) ∈ V
16	13, 14, 15	ovmpoa 7305	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑁 BernPoly 𝑋) = (𝐹‘𝑁))
17		ltweuz 13330	. . . . 5 ⊢ < We (ℤ_≥‘0)
18		nn0uz 12281	. . . . . 6 ⊢ ℕ₀ = (ℤ_≥‘0)
19		weeq2 5544	. . . . . 6 ⊢ (ℕ₀ = (ℤ_≥‘0) → ( < We ℕ₀ ↔ < We (ℤ_≥‘0)))
20	18, 19	ax-mp 5	. . . . 5 ⊢ ( < We ℕ₀ ↔ < We (ℤ_≥‘0))
21	17, 20	mpbir 233	. . . 4 ⊢ < We ℕ₀
22		nn0ex 11904	. . . . 5 ⊢ ℕ₀ ∈ V
23		exse 5519	. . . . 5 ⊢ (ℕ₀ ∈ V → < Se ℕ₀)
24	22, 23	ax-mp 5	. . . 4 ⊢ < Se ℕ₀
25	21, 24, 9	wfr2 7974	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (𝐹‘𝑁) = (𝐺‘(𝐹 ↾ Pred( < , ℕ₀, 𝑁))))
26	25	adantr 483	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝐹‘𝑁) = (𝐺‘(𝐹 ↾ Pred( < , ℕ₀, 𝑁))))
27		prednn0 13032	. . . . . 6 ⊢ (𝑁 ∈ ℕ₀ → Pred( < , ℕ₀, 𝑁) = (0...(𝑁 − 1)))
28	27	adantr 483	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Pred( < , ℕ₀, 𝑁) = (0...(𝑁 − 1)))
29	28	reseq2d 5853	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝐹 ↾ Pred( < , ℕ₀, 𝑁)) = (𝐹 ↾ (0...(𝑁 − 1))))
30	29	fveq2d 6674	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝐺‘(𝐹 ↾ Pred( < , ℕ₀, 𝑁))) = (𝐺‘(𝐹 ↾ (0...(𝑁 − 1)))))
31	21, 24, 9	wfrfun 7965	. . . . . 6 ⊢ Fun 𝐹
32		ovex 7189	. . . . . 6 ⊢ (0...(𝑁 − 1)) ∈ V
33		resfunexg 6978	. . . . . 6 ⊢ ((Fun 𝐹 ∧ (0...(𝑁 − 1)) ∈ V) → (𝐹 ↾ (0...(𝑁 − 1))) ∈ V)
34	31, 32, 33	mp2an 690	. . . . 5 ⊢ (𝐹 ↾ (0...(𝑁 − 1))) ∈ V
35		dmeq 5772	. . . . . . . . . . 11 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → dom 𝑔 = dom (𝐹 ↾ (0...(𝑁 − 1))))
36	21, 24, 9	wfr1 7973	. . . . . . . . . . . . 13 ⊢ 𝐹 Fn ℕ₀
37		fz0ssnn0 13003	. . . . . . . . . . . . 13 ⊢ (0...(𝑁 − 1)) ⊆ ℕ₀
38		fnssres 6470	. . . . . . . . . . . . 13 ⊢ ((𝐹 Fn ℕ₀ ∧ (0...(𝑁 − 1)) ⊆ ℕ₀) → (𝐹 ↾ (0...(𝑁 − 1))) Fn (0...(𝑁 − 1)))
39	36, 37, 38	mp2an 690	. . . . . . . . . . . 12 ⊢ (𝐹 ↾ (0...(𝑁 − 1))) Fn (0...(𝑁 − 1))
40		fndm 6455	. . . . . . . . . . . 12 ⊢ ((𝐹 ↾ (0...(𝑁 − 1))) Fn (0...(𝑁 − 1)) → dom (𝐹 ↾ (0...(𝑁 − 1))) = (0...(𝑁 − 1)))
41	39, 40	ax-mp 5	. . . . . . . . . . 11 ⊢ dom (𝐹 ↾ (0...(𝑁 − 1))) = (0...(𝑁 − 1))
42	35, 41	syl6eq 2872	. . . . . . . . . 10 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → dom 𝑔 = (0...(𝑁 − 1)))
43		fveq1 6669	. . . . . . . . . . . . 13 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → (𝑔‘𝑘) = ((𝐹 ↾ (0...(𝑁 − 1)))‘𝑘))
44		fvres 6689	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (0...(𝑁 − 1)) → ((𝐹 ↾ (0...(𝑁 − 1)))‘𝑘) = (𝐹‘𝑘))
45	43, 44	sylan9eq 2876	. . . . . . . . . . . 12 ⊢ ((𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → (𝑔‘𝑘) = (𝐹‘𝑘))
46	45	oveq1d 7171	. . . . . . . . . . 11 ⊢ ((𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)) = ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))
47	46	oveq2d 7172	. . . . . . . . . 10 ⊢ ((𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1))))
48	42, 47	sumeq12rdv 15064	. . . . . . . . 9 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))) = Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1))))
49	48	oveq2d 7172	. . . . . . . 8 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → ((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
50	49	csbeq2dv 3890	. . . . . . 7 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
51	42	fveq2d 6674	. . . . . . . 8 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → (♯‘dom 𝑔) = (♯‘(0...(𝑁 − 1))))
52	51	csbeq1d 3887	. . . . . . 7 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
53	50, 52	eqtrd 2856	. . . . . 6 ⊢ (𝑔 = (𝐹 ↾ (0...(𝑁 − 1))) → ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
54		ovex 7189	. . . . . . 7 ⊢ ((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) ∈ V
55	54	csbex 5215	. . . . . 6 ⊢ ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) ∈ V
56	53, 5, 55	fvmpt 6768	. . . . 5 ⊢ ((𝐹 ↾ (0...(𝑁 − 1))) ∈ V → (𝐺‘(𝐹 ↾ (0...(𝑁 − 1)))) = ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
57	34, 56	ax-mp 5	. . . 4 ⊢ (𝐺‘(𝐹 ↾ (0...(𝑁 − 1)))) = ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1))))
58		nfcvd 2978	. . . . . . 7 ⊢ (𝑁 ∈ ℕ₀ → Ⅎ𝑛((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))))
59		oveq2 7164	. . . . . . . 8 ⊢ (𝑛 = 𝑁 → (𝑋↑𝑛) = (𝑋↑𝑁))
60		oveq1 7163	. . . . . . . . . 10 ⊢ (𝑛 = 𝑁 → (𝑛C𝑘) = (𝑁C𝑘))
61		oveq1 7163	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑁 → (𝑛 − 𝑘) = (𝑁 − 𝑘))
62	61	oveq1d 7171	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑁 → ((𝑛 − 𝑘) + 1) = ((𝑁 − 𝑘) + 1))
63	62	oveq2d 7172	. . . . . . . . . 10 ⊢ (𝑛 = 𝑁 → ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)) = ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))
64	60, 63	oveq12d 7174	. . . . . . . . 9 ⊢ (𝑛 = 𝑁 → ((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1))) = ((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1))))
65	64	sumeq2sdv 15061	. . . . . . . 8 ⊢ (𝑛 = 𝑁 → Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1))) = Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1))))
66	59, 65	oveq12d 7174	. . . . . . 7 ⊢ (𝑛 = 𝑁 → ((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))))
67	58, 66	csbiegf 3916	. . . . . 6 ⊢ (𝑁 ∈ ℕ₀ → ⦋𝑁 / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))))
68	67	adantr 483	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ⦋𝑁 / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))))
69		nn0z 12006	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℤ)
70		fz01en 12936	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℤ → (0...(𝑁 − 1)) ≈ (1...𝑁))
71	69, 70	syl 17	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ₀ → (0...(𝑁 − 1)) ≈ (1...𝑁))
72		fzfi 13341	. . . . . . . . . 10 ⊢ (0...(𝑁 − 1)) ∈ Fin
73		fzfi 13341	. . . . . . . . . 10 ⊢ (1...𝑁) ∈ Fin
74		hashen 13708	. . . . . . . . . 10 ⊢ (((0...(𝑁 − 1)) ∈ Fin ∧ (1...𝑁) ∈ Fin) → ((♯‘(0...(𝑁 − 1))) = (♯‘(1...𝑁)) ↔ (0...(𝑁 − 1)) ≈ (1...𝑁)))
75	72, 73, 74	mp2an 690	. . . . . . . . 9 ⊢ ((♯‘(0...(𝑁 − 1))) = (♯‘(1...𝑁)) ↔ (0...(𝑁 − 1)) ≈ (1...𝑁))
76	71, 75	sylibr 236	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → (♯‘(0...(𝑁 − 1))) = (♯‘(1...𝑁)))
77		hashfz1 13707	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ₀ → (♯‘(1...𝑁)) = 𝑁)
78	76, 77	eqtrd 2856	. . . . . . 7 ⊢ (𝑁 ∈ ℕ₀ → (♯‘(0...(𝑁 − 1))) = 𝑁)
79	78	adantr 483	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (♯‘(0...(𝑁 − 1))) = 𝑁)
80	79	csbeq1d 3887	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ⦋𝑁 / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))))
81		elfznn0 13001	. . . . . . . . . 10 ⊢ (𝑘 ∈ (0...(𝑁 − 1)) → 𝑘 ∈ ℕ₀)
82		simpr 487	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → 𝑋 ∈ ℂ)
83		fveq2 6670	. . . . . . . . . . . 12 ⊢ (𝑚 = 𝑘 → (𝐹‘𝑚) = (𝐹‘𝑘))
84	11, 83	sylan9eqr 2878	. . . . . . . . . . 11 ⊢ ((𝑚 = 𝑘 ∧ 𝑥 = 𝑋) → (wrecs( < , ℕ₀, (𝑔 ∈ V ↦ ⦋(♯‘dom 𝑔) / 𝑛⦌((𝑥↑𝑛) − Σ𝑘 ∈ dom 𝑔((𝑛C𝑘) · ((𝑔‘𝑘) / ((𝑛 − 𝑘) + 1))))))‘𝑚) = (𝐹‘𝑘))
85		fvex 6683	. . . . . . . . . . 11 ⊢ (𝐹‘𝑘) ∈ V
86	84, 14, 85	ovmpoa 7305	. . . . . . . . . 10 ⊢ ((𝑘 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝑘 BernPoly 𝑋) = (𝐹‘𝑘))
87	81, 82, 86	syl2anr 598	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → (𝑘 BernPoly 𝑋) = (𝐹‘𝑘))
88	87	oveq1d 7171	. . . . . . . 8 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)) = ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))
89	88	oveq2d 7172	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) ∧ 𝑘 ∈ (0...(𝑁 − 1))) → ((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = ((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1))))
90	89	sumeq2dv 15060	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1))) = Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1))))
91	90	oveq2d 7172	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝐹‘𝑘) / ((𝑁 − 𝑘) + 1)))))
92	68, 80, 91	3eqtr4d 2866	. . . 4 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → ⦋(♯‘(0...(𝑁 − 1))) / 𝑛⦌((𝑋↑𝑛) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑛C𝑘) · ((𝐹‘𝑘) / ((𝑛 − 𝑘) + 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
93	57, 92	syl5eq 2868	. . 3 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝐺‘(𝐹 ↾ (0...(𝑁 − 1)))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
94	30, 93	eqtrd 2856	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ ℂ) → (𝐺‘(𝐹 ↾ Pred( < , ℕ₀, 𝑁))) = ((𝑋↑𝑁) − Σ𝑘 ∈ (0...(𝑁 − 1))((𝑁C𝑘) · ((𝑘 BernPoly 𝑋) / ((𝑁 − 𝑘) + 1)))))
95	16, 26, 94	3eqtrd 2860	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 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 Vcvv 3494 ⦋csb 3883 ⊆ wss 3936 class class class wbr 5066 ↦ cmpt 5146 Se wse 5512 We wwe 5513 dom cdm 5555 ↾ cres 5557 Predcpred 6147 Fun wfun 6349 Fn wfn 6350 ‘cfv 6355 (class class class)co 7156 wrecscwrecs 7946 ≈ cen 8506 Fincfn 8509 ℂcc 10535 0cc0 10537 1c1 10538 + caddc 10540 · cmul 10542 < clt 10675 − cmin 10870 / cdiv 11297 ℕ₀cn0 11898 ℤcz 11982 ℤ_≥cuz 12244 ...cfz 12893 ↑cexp 13430 Ccbc 13663 ♯chash 13691 Σcsu 15042 BernPoly cbp 15400

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-inf2 9104 ax-cnex 10593 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-addrcl 10598 ax-mulcl 10599 ax-mulrcl 10600 ax-mulcom 10601 ax-addass 10602 ax-mulass 10603 ax-distr 10604 ax-i2m1 10605 ax-1ne0 10606 ax-1rid 10607 ax-rnegex 10608 ax-rrecex 10609 ax-cnre 10610 ax-pre-lttri 10611 ax-pre-lttrn 10612 ax-pre-ltadd 10613 ax-pre-mulgt0 10614

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4839 df-int 4877 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-tr 5173 df-id 5460 df-eprel 5465 df-po 5474 df-so 5475 df-fr 5514 df-se 5515 df-we 5516 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-pred 6148 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-isom 6364 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-om 7581 df-1st 7689 df-2nd 7690 df-wrecs 7947 df-recs 8008 df-rdg 8046 df-1o 8102 df-er 8289 df-en 8510 df-dom 8511 df-sdom 8512 df-fin 8513 df-card 9368 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 df-sub 10872 df-neg 10873 df-nn 11639 df-n0 11899 df-z 11983 df-uz 12245 df-fz 12894 df-seq 13371 df-hash 13692 df-sum 15043 df-bpoly 15401

This theorem is referenced by: bpolyval 15403

W3C validator