altgsumbcALT - Mathbox for Alexander van der Vekens

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Theorem altgsumbcALT 41924

Description: Alternate proof of altgsumbc 41923, using Pascal's rule (bcpascm1 41922) instead of the binomial theorem (binom 14401). (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 12213	. . . . . . 7 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℤ)
2		bcpascm1 41922	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ ℤ) → (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))) = (𝑁C𝑘))
3	1, 2	sylan2 490	. . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))) = (𝑁C𝑘))
4	3	eqcomd 2616	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (𝑁C𝑘) = (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1))))
5	4	oveq2d 6565	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · (𝑁C𝑘)) = ((-1↑𝑘) · (((𝑁 − 1)C𝑘) + ((𝑁 − 1)C(𝑘 − 1)))))
6		ax-1cn 9873	. . . . . . 7 ⊢ 1 ∈ ℂ
7		negcl 10160	. . . . . . . 8 ⊢ (1 ∈ ℂ → -1 ∈ ℂ)
8		elfznn0 12302	. . . . . . . 8 ⊢ (𝑘 ∈ (0...𝑁) → 𝑘 ∈ ℕ₀)
9		expcl 12740	. . . . . . . 8 ⊢ ((-1 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (-1↑𝑘) ∈ ℂ)
10	7, 8, 9	syl2an 493	. . . . . . 7 ⊢ ((1 ∈ ℂ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
11	6, 10	mpan 702	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (-1↑𝑘) ∈ ℂ)
12	11	adantl 481	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
13		nnm1nn0 11211	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) ∈ ℕ₀)
14		bccl 12971	. . . . . . 7 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 1)C𝑘) ∈ ℕ₀)
15	14	nn0cnd 11230	. . . . . 6 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 1)C𝑘) ∈ ℂ)
16	13, 1, 15	syl2an 493	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C𝑘) ∈ ℂ)
17		peano2zm 11297	. . . . . . 7 ⊢ (𝑘 ∈ ℤ → (𝑘 − 1) ∈ ℤ)
18	1, 17	syl 17	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (𝑘 − 1) ∈ ℤ)
19		bccl 12971	. . . . . . 7 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑘 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℕ₀)
20	19	nn0cnd 11230	. . . . . 6 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑘 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
21	13, 18, 20	syl2an 493	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
22	12, 16, 21	adddid 9943	. . . 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 2644	. . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · (𝑁C𝑘)) = (((-1↑𝑘) · ((𝑁 − 1)C𝑘)) + ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1)))))
24	23	sumeq2dv 14281	. 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 12634	. . . 4 ⊢ (𝑁 ∈ ℕ → (0...𝑁) ∈ Fin)
26		neg1cn 11001	. . . . . . 7 ⊢ -1 ∈ ℂ
27	26	a1i 11	. . . . . 6 ⊢ (𝑁 ∈ ℕ → -1 ∈ ℂ)
28	27, 8, 9	syl2an 493	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → (-1↑𝑘) ∈ ℂ)
29	28, 16	mulcld 9939	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C𝑘)) ∈ ℂ)
30		1z 11284	. . . . . . . 8 ⊢ 1 ∈ ℤ
31	30	a1i 11	. . . . . . 7 ⊢ (𝑘 ∈ (0...𝑁) → 1 ∈ ℤ)
32	1, 31	zsubcld 11363	. . . . . 6 ⊢ (𝑘 ∈ (0...𝑁) → (𝑘 − 1) ∈ ℤ)
33	13, 32, 20	syl2an 493	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
34	28, 33	mulcld 9939	. . . 4 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (0...𝑁)) → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
35	25, 29, 34	fsumadd 14317	. . 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 11266	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 0 ∈ ℤ)
38		nnz 11276	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ)
39		oveq2 6557	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → (-1↑𝑘) = (-1↑(𝑗 − 1)))
40		oveq2 6557	. . . . . . 7 ⊢ (𝑘 = (𝑗 − 1) → ((𝑁 − 1)C𝑘) = ((𝑁 − 1)C(𝑗 − 1)))
41	39, 40	oveq12d 6567	. . . . . 6 ⊢ (𝑘 = (𝑗 − 1) → ((-1↑𝑘) · ((𝑁 − 1)C𝑘)) = ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))))
42	36, 37, 38, 29, 41	fsumshft 14354	. . . . 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 11009	. . . . . . . 8 ⊢ (0 + 1) = 1
44	43	oveq1i 6559	. . . . . . 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 14279	. . . . 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 11600	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ ↔ 𝑁 ∈ (ℤ_≥‘1))
48	47	biimpi 205	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘1))
49	26	a1i 11	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → -1 ∈ ℂ)
50		elfznn 12241	. . . . . . . . . . 11 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 𝑗 ∈ ℕ)
51		nnm1nn0 11211	. . . . . . . . . . 11 ⊢ (𝑗 ∈ ℕ → (𝑗 − 1) ∈ ℕ₀)
52	50, 51	syl 17	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → (𝑗 − 1) ∈ ℕ₀)
53	52	adantl 481	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → (𝑗 − 1) ∈ ℕ₀)
54	49, 53	expcld 12870	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → (-1↑(𝑗 − 1)) ∈ ℂ)
55		elfzelz 12213	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 𝑗 ∈ ℤ)
56		elfzel1 12212	. . . . . . . . . 10 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → 1 ∈ ℤ)
57	55, 56	zsubcld 11363	. . . . . . . . 9 ⊢ (𝑗 ∈ (1...(𝑁 + 1)) → (𝑗 − 1) ∈ ℤ)
58		bccl 12971	. . . . . . . . . 10 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑗 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℕ₀)
59	58	nn0cnd 11230	. . . . . . . . 9 ⊢ (((𝑁 − 1) ∈ ℕ₀ ∧ (𝑗 − 1) ∈ ℤ) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℂ)
60	13, 57, 59	syl2an 493	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → ((𝑁 − 1)C(𝑗 − 1)) ∈ ℂ)
61	54, 60	mulcld 9939	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑗 ∈ (1...(𝑁 + 1))) → ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) ∈ ℂ)
62		oveq1 6556	. . . . . . . . 9 ⊢ (𝑗 = (𝑁 + 1) → (𝑗 − 1) = ((𝑁 + 1) − 1))
63	62	oveq2d 6565	. . . . . . . 8 ⊢ (𝑗 = (𝑁 + 1) → (-1↑(𝑗 − 1)) = (-1↑((𝑁 + 1) − 1)))
64	62	oveq2d 6565	. . . . . . . 8 ⊢ (𝑗 = (𝑁 + 1) → ((𝑁 − 1)C(𝑗 − 1)) = ((𝑁 − 1)C((𝑁 + 1) − 1)))
65	63, 64	oveq12d 6567	. . . . . . 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 14329	. . . . . 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 10905	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℂ)
68		pncan1 10333	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) − 1) = 𝑁)
69	67, 68	syl 17	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) = 𝑁)
70		nnnn0 11176	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℕ₀)
71	69, 70	eqeltrd 2688	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) ∈ ℕ₀)
72	71	nn0zd 11356	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → ((𝑁 + 1) − 1) ∈ ℤ)
73		nnre 10904	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ)
74		ltm1 10742	. . . . . . . . . . . . 13 ⊢ (𝑁 ∈ ℝ → (𝑁 − 1) < 𝑁)
75	73, 74	syl 17	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) < 𝑁)
76	75, 69	breqtrrd 4611	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) < ((𝑁 + 1) − 1))
77	76	olcd 407	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → (((𝑁 + 1) − 1) < 0 ∨ (𝑁 − 1) < ((𝑁 + 1) − 1)))
78		bcval4 12956	. . . . . . . . . 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 1318	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → ((𝑁 − 1)C((𝑁 + 1) − 1)) = 0)
80	79	oveq2d 6565	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1))) = ((-1↑((𝑁 + 1) − 1)) · 0))
81	27, 71	expcld 12870	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (-1↑((𝑁 + 1) − 1)) ∈ ℂ)
82	81	mul01d 10114	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · 0) = 0)
83	80, 82	eqtrd 2644	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → ((-1↑((𝑁 + 1) − 1)) · ((𝑁 − 1)C((𝑁 + 1) − 1))) = 0)
84	83	oveq2d 6565	. . . . . 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 6556	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑘 → (𝑗 − 1) = (𝑘 − 1))
86	85	oveq2d 6565	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → (-1↑(𝑗 − 1)) = (-1↑(𝑘 − 1)))
87	85	oveq2d 6565	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑘 → ((𝑁 − 1)C(𝑗 − 1)) = ((𝑁 − 1)C(𝑘 − 1)))
88	86, 87	oveq12d 6567	. . . . . . . . . 10 ⊢ (𝑗 = 𝑘 → ((-1↑(𝑗 − 1)) · ((𝑁 − 1)C(𝑗 − 1))) = ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
89	88	cbvsumv 14274	. . . . . . . . 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 6564	. . . . . . 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 12634	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (1...𝑁) ∈ Fin)
93	26	a1i 11	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → -1 ∈ ℂ)
94		elfznn 12241	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℕ)
95		nnm1nn0 11211	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ ℕ → (𝑘 − 1) ∈ ℕ₀)
96	94, 95	syl 17	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...𝑁) → (𝑘 − 1) ∈ ℕ₀)
97	96	adantl 481	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (𝑘 − 1) ∈ ℕ₀)
98	93, 97	expcld 12870	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑(𝑘 − 1)) ∈ ℂ)
99		elfzelz 12213	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℤ)
100		elfzel1 12212	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 1 ∈ ℤ)
101	99, 100	zsubcld 11363	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (1...𝑁) → (𝑘 − 1) ∈ ℤ)
102	13, 101, 19	syl2an 493	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℕ₀)
103	102	nn0cnd 11230	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((𝑁 − 1)C(𝑘 − 1)) ∈ ℂ)
104	98, 103	mulcld 9939	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
105	92, 104	fsumcl 14311	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))) ∈ ℂ)
106	105	addid1d 10115	. . . . . . 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 2644	. . . . . 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 2648	. . . . 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 2648	. . . 4 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · ((𝑁 − 1)C𝑘)) = Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1))))
110		elnn0uz 11601	. . . . . . 7 ⊢ (𝑁 ∈ ℕ₀ ↔ 𝑁 ∈ (ℤ_≥‘0))
111	70, 110	sylib 207	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ (ℤ_≥‘0))
112		oveq2 6557	. . . . . . 7 ⊢ (𝑘 = 0 → (-1↑𝑘) = (-1↑0))
113		oveq1 6556	. . . . . . . 8 ⊢ (𝑘 = 0 → (𝑘 − 1) = (0 − 1))
114	113	oveq2d 6565	. . . . . . 7 ⊢ (𝑘 = 0 → ((𝑁 − 1)C(𝑘 − 1)) = ((𝑁 − 1)C(0 − 1)))
115	112, 114	oveq12d 6567	. . . . . 6 ⊢ (𝑘 = 0 → ((-1↑𝑘) · ((𝑁 − 1)C(𝑘 − 1))) = ((-1↑0) · ((𝑁 − 1)C(0 − 1))))
116	111, 34, 115	fsum1p 14326	. . . . 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 12864	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → (-1↑0) = 1)
118		0z 11265	. . . . . . . . . . 11 ⊢ 0 ∈ ℤ
119		zsubcl 11296	. . . . . . . . . . 11 ⊢ ((0 ∈ ℤ ∧ 1 ∈ ℤ) → (0 − 1) ∈ ℤ)
120	118, 30, 119	mp2an 704	. . . . . . . . . 10 ⊢ (0 − 1) ∈ ℤ
121	120	a1i 11	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (0 − 1) ∈ ℤ)
122		0re 9919	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ
123		ltm1 10742	. . . . . . . . . . 11 ⊢ (0 ∈ ℝ → (0 − 1) < 0)
124	122, 123	mp1i 13	. . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → (0 − 1) < 0)
125	124	orcd 406	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → ((0 − 1) < 0 ∨ (𝑁 − 1) < (0 − 1)))
126		bcval4 12956	. . . . . . . . 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 1318	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((𝑁 − 1)C(0 − 1)) = 0)
128	117, 127	oveq12d 6567	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → ((-1↑0) · ((𝑁 − 1)C(0 − 1))) = (1 · 0))
129	6	a1i 11	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → 1 ∈ ℂ)
130	129	mul01d 10114	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (1 · 0) = 0)
131	128, 130	eqtrd 2644	. . . . . 6 ⊢ (𝑁 ∈ ℕ → ((-1↑0) · ((𝑁 − 1)C(0 − 1))) = 0)
132	43	a1i 11	. . . . . . . . 9 ⊢ (𝑁 ∈ ℕ → (0 + 1) = 1)
133	132	oveq1d 6564	. . . . . . . 8 ⊢ (𝑁 ∈ ℕ → ((0 + 1)...𝑁) = (1...𝑁))
134	99	zcnd 11359	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 ∈ ℂ)
135		npcan1 10334	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ ℂ → ((𝑘 − 1) + 1) = 𝑘)
136	135	eqcomd 2616	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ ℂ → 𝑘 = ((𝑘 − 1) + 1))
137	134, 136	syl 17	. . . . . . . . . . . . 13 ⊢ (𝑘 ∈ (1...𝑁) → 𝑘 = ((𝑘 − 1) + 1))
138	137	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → 𝑘 = ((𝑘 − 1) + 1))
139	138	oveq2d 6565	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑𝑘) = (-1↑((𝑘 − 1) + 1)))
140		expp1 12729	. . . . . . . . . . . 12 ⊢ ((-1 ∈ ℂ ∧ (𝑘 − 1) ∈ ℕ₀) → (-1↑((𝑘 − 1) + 1)) = ((-1↑(𝑘 − 1)) · -1))
141	27, 96, 140	syl2an 493	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑((𝑘 − 1) + 1)) = ((-1↑(𝑘 − 1)) · -1))
142	139, 141	eqtrd 2644	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → (-1↑𝑘) = ((-1↑(𝑘 − 1)) · -1))
143	142	oveq1d 6564	. . . . . . . . 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 9940	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ ∧ 𝑘 ∈ (1...𝑁)) → ((-1↑(𝑘 − 1)) · -1) = (-1 · (-1↑(𝑘 − 1))))
145	144	oveq1d 6564	. . . . . . . . 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 9942	. . . . . . . . 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 2648	. . . . . . . 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 14285	. . . . . . 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 14358	. . . . . . 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 2647	. . . . . 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 6567	. . . . 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 9939	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (-1 · Σ𝑘 ∈ (1...𝑁)((-1↑(𝑘 − 1)) · ((𝑁 − 1)C(𝑘 − 1)))) ∈ ℂ)
153	152	addid2d 10116	. . . . 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 2648	. . . 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 6567	. . 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 2644	. 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 10361	. . . 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 6565	. . 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 10261	. . 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 2644	. 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 2648	1 ⊢ (𝑁 ∈ ℕ → Σ𝑘 ∈ (0...𝑁)((-1↑𝑘) · (𝑁C𝑘)) = 0)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∨ wo 382 ∧ wa 383 = wceq 1475 ∈ wcel 1977 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 ℂcc 9813 ℝcr 9814 0cc0 9815 1c1 9816 + caddc 9818 · cmul 9820 < clt 9953 − cmin 10145 -cneg 10146 ℕcn 10897 ℕ₀cn0 11169 ℤcz 11254 ℤ_≥cuz 11563 ...cfz 12197 ↑cexp 12722 Ccbc 12951 Σcsu 14264

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-oi 8298 df-card 8648 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-fz 12198 df-fzo 12335 df-seq 12664 df-exp 12723 df-fac 12923 df-bc 12952 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-sum 14265

This theorem is referenced by: (None)

W3C validator