altgsumbcALT - Mathbox for Alexander van der Vekens

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Theorem altgsumbcALT 45689

Description: Alternate proof of altgsumbc 45688, using Pascal's rule (bcpascm1 45687) instead of the binomial theorem (binom 15542). (Contributed by AV, 8-Sep-2019.) (Proof modification is discouraged.) (New usage is discouraged.)

**Assertion**
Ref	Expression
altgsumbcALT	⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · (𝑁C𝑘)) = 0)

Distinct variable group: 𝑘,𝑁

Proof of Theorem altgsumbcALT Dummy variable 𝑗 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elfzelz 13256	. . . . . . 7 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
2		bcpascm1 45687	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ ℤ) → (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))) = (𝑁C𝑘))
3	1, 2	sylan2 593	. . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))) = (𝑁C𝑘))
4	3	eqcomd 2744	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) = (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))))
5	4	oveq2d 7291	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · (𝑁C𝑘)) = ((-1↑𝑘) · (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1)))))
6		ax-1cn 10929	. . . . . . 7 ⊢ 1 ∈ ℂ
7		negcl 11221	. . . . . . . 8 ⊢ (1 ∈ ℂ → -1 ∈ ℂ)
8		elfznn0 13349	. . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
9		expcl 13800	. . . . . . . 8 ⊢ ((-1 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (-1↑𝑘) ∈ ℂ)
10	7, 8, 9	syl2an 596	. . . . . . 7 ⊢ ((1 ∈ ℂ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
11	6, 10	mpan 687	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (-1↑𝑘) ∈ ℂ)
12	11	adantl 482	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
13		nnm1nn0 12274	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) ∈ ℕ₀)
14		bccl 14036	. . . . . . 7 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 1)C𝑘) ∈ ℕ₀)
15	14	nn0cnd 12295	. . . . . 6 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 1)C𝑘) ∈ ℂ)
16	13, 1, 15	syl2an 596	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C𝑘) ∈ ℂ)
17		peano2zm 12363	. . . . . . 7 ⊢ (𝑘 ∈ ℤ → (𝑘 − 1) ∈ ℤ)
18	1, 17	syl 17	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (𝑘 − 1) ∈ ℤ)
19		bccl 14036	. . . . . . 7 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑘 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℕ₀)
20	19	nn0cnd 12295	. . . . . 6 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑘 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
21	13, 18, 20	syl2an 596	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
22	12, 16, 21	adddid 10999	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1)))) = (((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
23	5, 22	eqtrd 2778	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · (𝑁C𝑘)) = (((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
24	23	sumeq2dv 15415	. 2 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · (𝑁C𝑘)) = Σ𝑘 ∈ (0...𝑁)(((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
25		fzfid 13693	. . . 4 ⊢ (𝑁 ∈ ℕ → (0...𝑁) ∈ Fin)
26		neg1cn 12087	. . . . . . 7 ⊢ -1 ∈ ℂ
27	26	a1i 11	. . . . . 6 ⊢ (𝑁 ∈ ℕ → -1 ∈ ℂ)
28	27, 8, 9	syl2an 596	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
29	28, 16	mulcld 10995	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C𝑘)) ∈ ℂ)
30		1z 12350	. . . . . . . 8 ⊢ 1 ∈ ℤ
31	30	a1i 11	. . . . . . 7 ⊢ (𝑘 ∈ (0...𝑁) → 1 ∈ ℤ)
32	1, 31	zsubcld 12431	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (𝑘 − 1) ∈ ℤ)
33	13, 32, 20	syl2an 596	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
34	28, 33	mulcld 10995	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
35	25, 29, 34	fsumadd 15452	. . 3 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)(((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))) = (Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
36	30	a1i 11	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 1 ∈ ℤ)
37		0zd 12331	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 0 ∈ ℤ)
38		nnz 12342	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ)
39		oveq2 7283	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → (-1↑𝑘) = (-1↑(𝑗 − 1)))
40		oveq2 7283	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → ((𝑁 − 1)C𝑘) = ((𝑁 − 1)C(𝑗 − 1)))
41	39, 40	oveq12d 7293	. . . . . 6 ⊢ (𝑘 = (𝑗 − 1) → ((-1↑𝑘) · ((𝑁 − 1)C𝑘)) = ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))))
42	36, 37, 38, 29, 41	fsumshft 15492	. . . . 5 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C𝑘)) = Σ𝑗 ∈ ((0 + 1)...(𝑁 + 1))((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))))
43		0p1e1 12095	. . . . . . . 8 ⊢ (0 + 1) = 1
44	43	oveq1i 7285	. . . . . . 7 ⊢ ((0 + 1)...(𝑁 + 1)) = (1...(𝑁 + 1))
45	44	a1i 11	. . . . . 6 ⊢ (𝑁 ∈ ℕ → ((0 + 1)...(𝑁 + 1)) = (1...(𝑁 + 1)))
46	45	sumeq1d 15413	. . . . 5 ⊢ (𝑁 ∈ ℕ → Σ𝑗 ∈ ((0 + 1)...(𝑁 + 1))((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = Σ𝑗 ∈ (1...(𝑁 + 1))((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))))
47		elnnuz 12622	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ ↔ 𝑁 ∈ (ℤ_≥‘1))
48	47	biimpi 215	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘1))
49	26	a1i 11	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → -1 ∈ ℂ)
50		elfznn 13285	. . . . . . . . . . 11 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 𝑗 ∈ ℕ)
51		nnm1nn0 12274	. . . . . . . . . . 11 ⊢ (𝑗 ∈ ℕ → (𝑗 − 1) ∈ ℕ₀)
52	50, 51	syl 17	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → (𝑗 − 1) ∈ ℕ₀)
53	52	adantl 482	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → (𝑗 − 1) ∈ ℕ₀)
54	49, 53	expcld 13864	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → (-1↑(𝑗 − 1)) ∈ ℂ)
55		elfzelz 13256	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 𝑗 ∈ ℤ)
56		elfzel1 13255	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 1 ∈ ℤ)
57	55, 56	zsubcld 12431	. . . . . . . . 9 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → (𝑗 − 1) ∈ ℤ)
58		bccl 14036	. . . . . . . . . 10 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑗 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℕ₀)
59	58	nn0cnd 12295	. . . . . . . . 9 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑗 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℂ)
60	13, 57, 59	syl2an 596	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℂ)
61	54, 60	mulcld 10995	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) ∈ ℂ)
62		oveq1 7282	. . . . . . . . 9 ⊢ (𝑗 = (𝑁 + 1) → (𝑗 − 1) = ((𝑁 + 1) − 1))
63	62	oveq2d 7291	. . . . . . . 8 ⊢ (𝑗 = (𝑁 + 1) → (-1↑(𝑗 − 1)) = (-1↑((𝑁 + 1) − 1)))
64	62	oveq2d 7291	. . . . . . . 8 ⊢ (𝑗 = (𝑁 + 1) → ((𝑁 − 1)C(𝑗 − 1)) = ((𝑁 − 1)C((𝑁 + 1) − 1)))
65	63, 64	oveq12d 7293	. . . . . . 7 ⊢ (𝑗 = (𝑁 + 1) → ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1))))
66	48, 61, 65	fsump1 15468	. . . . . 6 ⊢ (𝑁 ∈ ℕ → Σ𝑗 ∈ (1...(𝑁 + 1))((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = (Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) + ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1)))))
67		nncn 11981	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ)
68		pncan1 11399	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) − 1) = 𝑁)
69	67, 68	syl 17	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) = 𝑁)
70		nnnn0 12240	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℕ₀)
71	69, 70	eqeltrd 2839	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) ∈ ℕ₀)
72	71	nn0zd 12424	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) ∈ ℤ)
73		nnre 11980	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ)
74		ltm1 11817	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℝ → (𝑁 − 1) < 𝑁)
75	73, 74	syl 17	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) < 𝑁)
76	75, 69	breqtrrd 5102	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) < ((𝑁 + 1) − 1))
77	76	olcd 871	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → (((𝑁 + 1) − 1) < 0 ∨ (𝑁 − 1) < ((𝑁 + 1) − 1)))
78		bcval4 14021	. . . . . . . . . 10 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ ((𝑁 + 1) − 1) ∈ ℤ ∧ (((𝑁 + 1) − 1) < 0 ∨ (𝑁 − 1) < ((𝑁 + 1) − 1))) → ((𝑁 − 1)C((𝑁 + 1) − 1)) = 0)
79	13, 72, 77, 78	syl3anc 1370	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → ((𝑁 − 1)C((𝑁 + 1) − 1)) = 0)
80	79	oveq2d 7291	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1))) = ((-1↑((𝑁 + 1) − 1)) · 0))
81	27, 71	expcld 13864	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (-1↑((𝑁 + 1) − 1)) ∈ ℂ)
82	81	mul01d 11174	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · 0) = 0)
83	80, 82	eqtrd 2778	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1))) = 0)
84	83	oveq2d 7291	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) + ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1)))) = (Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) + 0))
85		oveq1 7282	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (𝑗 − 1) = (𝑘 − 1))
86	85	oveq2d 7291	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → (-1↑(𝑗 − 1)) = (-1↑(𝑘 − 1)))
87	85	oveq2d 7291	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝑁 − 1)C(𝑗 − 1)) = ((𝑁 − 1)C(𝑘 − 1)))
88	86, 87	oveq12d 7293	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
89	88	cbvsumv 15408	. . . . . . . . 9 ⊢ Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))
90	89	a1i 11	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
91	90	oveq1d 7290	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) + 0) = (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + 0))
92		fzfid 13693	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (1...𝑁) ∈ Fin)
93	26	a1i 11	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → -1 ∈ ℂ)
94		elfznn 13285	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℕ)
95		nnm1nn0 12274	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → (𝑘 − 1) ∈ ℕ₀)
96	94, 95	syl 17	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...𝑁) → (𝑘 − 1) ∈ ℕ₀)
97	96	adantl 482	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (𝑘 − 1) ∈ ℕ₀)
98	93, 97	expcld 13864	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑(𝑘 − 1)) ∈ ℂ)
99		elfzelz 13256	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℤ)
100		elfzel1 13255	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 1 ∈ ℤ)
101	99, 100	zsubcld 12431	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...𝑁) → (𝑘 − 1) ∈ ℤ)
102	13, 101, 19	syl2an 596	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℕ₀)
103	102	nn0cnd 12295	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
104	98, 103	mulcld 10995	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
105	92, 104	fsumcl 15445	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
106	105	addid1d 11175	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + 0) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
107	91, 106	eqtrd 2778	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (Σ𝑗 ∈ (1...𝑁)((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) + 0) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
108	66, 84, 107	3eqtrd 2782	. . . . 5 ⊢ (𝑁 ∈ ℕ → Σ𝑗 ∈ (1...(𝑁 + 1))((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
109	42, 46, 108	3eqtrd 2782	. . . 4 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C𝑘)) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
110		elnn0uz 12623	. . . . . . 7 ⊢ (𝑁 ∈ ℕ₀ ↔ 𝑁 ∈ (ℤ_≥‘0))
111	70, 110	sylib 217	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘0))
112		oveq2 7283	. . . . . . 7 ⊢ (𝑘 = 0 → (-1↑𝑘) = (-1↑0))
113		oveq1 7282	. . . . . . . 8 ⊢ (𝑘 = 0 → (𝑘 − 1) = (0 − 1))
114	113	oveq2d 7291	. . . . . . 7 ⊢ (𝑘 = 0 → ((𝑁 − 1)C(𝑘 − 1)) = ((𝑁 − 1)C(0 − 1)))
115	112, 114	oveq12d 7293	. . . . . 6 ⊢ (𝑘 = 0 → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = ((-1↑0) · ((𝑁 − 1)C(0 − 1))))
116	111, 34, 115	fsum1p 15465	. . . . 5 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = (((-1↑0) · ((𝑁 − 1)C(0 − 1))) + Σ𝑘 ∈ ((0 + 1)...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
117	27	exp0d 13858	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → (-1↑0) = 1)
118		0z 12330	. . . . . . . . . . 11 ⊢ 0 ∈ ℤ
119		zsubcl 12362	. . . . . . . . . . 11 ⊢ ((0 ∈ ℤ ∧ 1 ∈ ℤ) → (0 − 1) ∈ ℤ)
120	118, 30, 119	mp2an 689	. . . . . . . . . 10 ⊢ (0 − 1) ∈ ℤ
121	120	a1i 11	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (0 − 1) ∈ ℤ)
122		0re 10977	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ
123		ltm1 11817	. . . . . . . . . . 11 ⊢ (0 ∈ ℝ → (0 − 1) < 0)
124	122, 123	mp1i 13	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → (0 − 1) < 0)
125	124	orcd 870	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → ((0 − 1) < 0 ∨ (𝑁 − 1) < (0 − 1)))
126		bcval4 14021	. . . . . . . . 9 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (0 − 1) ∈ ℤ ∧ ((0 − 1) < 0 ∨ (𝑁 − 1) < (0 − 1))) → ((𝑁 − 1)C(0 − 1)) = 0)
127	13, 121, 125, 126	syl3anc 1370	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((𝑁 − 1)C(0 − 1)) = 0)
128	117, 127	oveq12d 7293	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → ((-1↑0) · ((𝑁 − 1)C(0 − 1))) = (1 · 0))
129	6	a1i 11	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → 1 ∈ ℂ)
130	129	mul01d 11174	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (1 · 0) = 0)
131	128, 130	eqtrd 2778	. . . . . 6 ⊢ (𝑁 ∈ ℕ → ((-1↑0) · ((𝑁 − 1)C(0 − 1))) = 0)
132	43	a1i 11	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (0 + 1) = 1)
133	132	oveq1d 7290	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((0 + 1)...𝑁) = (1...𝑁))
134	99	zcnd 12427	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℂ)
135		npcan1 11400	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ ℂ → ((𝑘 − 1) + 1) = 𝑘)
136	135	eqcomd 2744	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ ℂ → 𝑘 = ((𝑘 − 1) + 1))
137	134, 136	syl 17	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 = ((𝑘 − 1) + 1))
138	137	adantl 482	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → 𝑘 = ((𝑘 − 1) + 1))
139	138	oveq2d 7291	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑𝑘) = (-1↑((𝑘 − 1) + 1)))
140		expp1 13789	. . . . . . . . . . . 12 ⊢ ((-1 ∈ ℂ ∧ (𝑘 − 1) ∈ ℕ₀) → (-1↑((𝑘 − 1) + 1)) = ((-1↑(𝑘 − 1)) · -1))
141	27, 96, 140	syl2an 596	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑((𝑘 − 1) + 1)) = ((-1↑(𝑘 − 1)) · -1))
142	139, 141	eqtrd 2778	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑𝑘) = ((-1↑(𝑘 − 1)) · -1))
143	142	oveq1d 7290	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = (((-1↑(𝑘 − 1)) · -1) · ((𝑁 − 1)C(𝑘 − 1))))
144	98, 93	mulcomd 10996	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑(𝑘 − 1)) · -1) = (-1 · (-1↑(𝑘 − 1))))
145	144	oveq1d 7290	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (((-1↑(𝑘 − 1)) · -1) · ((𝑁 − 1)C(𝑘 − 1))) = ((-1 · (-1↑(𝑘 − 1))) · ((𝑁 − 1)C(𝑘 − 1))))
146	93, 98, 103	mulassd 10998	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1 · (-1↑(𝑘 − 1))) · ((𝑁 − 1)C(𝑘 − 1))) = (-1 · ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
147	143, 145, 146	3eqtrd 2782	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = (-1 · ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
148	133, 147	sumeq12rdv 15419	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ ((0 + 1)...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = Σ𝑘 ∈ (1...𝑁)(-1 · ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
149	92, 27, 104	fsummulc2 15496	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))) = Σ𝑘 ∈ (1...𝑁)(-1 · ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
150	148, 149	eqtr4d 2781	. . . . . 6 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ ((0 + 1)...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
151	131, 150	oveq12d 7293	. . . . 5 ⊢ (𝑁 ∈ ℕ → (((-1↑0) · ((𝑁 − 1)C(0 − 1))) + Σ𝑘 ∈ ((0 + 1)...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))) = (0 + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))))
152	27, 105	mulcld 10995	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))) ∈ ℂ)
153	152	addid2d 11176	. . . . 5 ⊢ (𝑁 ∈ ℕ → (0 + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))) = (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
154	116, 151, 153	3eqtrd 2782	. . . 4 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
155	109, 154	oveq12d 7293	. . 3 ⊢ (𝑁 ∈ ℕ → (Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))) = (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))))
156	35, 155	eqtrd 2778	. 2 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)(((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))) = (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))))
157	105	mulm1d 11427	. . . 4 ⊢ (𝑁 ∈ ℕ → (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))) = -Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
158	157	oveq2d 7291	. . 3 ⊢ (𝑁 ∈ ℕ → (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))) = (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + -Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))))
159	105	negidd 11322	. . 3 ⊢ (𝑁 ∈ ℕ → (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + -Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))) = 0)
160	158, 159	eqtrd 2778	. 2 ⊢ (𝑁 ∈ ℕ → (Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) + (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))) = 0)
161	24, 156, 160	3eqtrd 2782	1 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · (𝑁C𝑘)) = 0)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 ∨ wo 844 = wceq 1539 ∈ wcel 2106 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 1c1 10872 + caddc 10874 · cmul 10876 < clt 11009 − cmin 11205 -cneg 11206 ℕcn 11973 ℕ₀cn0 12233 ℤcz 12319 ℤ_≥cuz 12582 ...cfz 13239 ↑cexp 13782 Ccbc 14016 Σcsu 15397

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-seq 13722 df-exp 13783 df-fac 13988 df-bc 14017 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-sum 15398

This theorem is referenced by: (None)

W3C validator