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Theorem basellem2 26586

Description: Lemma for basel 26594. Show that 𝑃 is a polynomial of degree 𝑀, and compute its coefficient function. (Contributed by Mario Carneiro, 30-Jul-2014.)

**Hypotheses**
Ref	Expression
basel.n	⊢ 𝑁 = ((2 · 𝑀) + 1)
basel.p	⊢ 𝑃 = (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗)))

**Assertion**
Ref	Expression
basellem2	⊢ (𝑀 ∈ ℕ → (𝑃 ∈ (Poly‘ℂ) ∧ (deg‘𝑃) = 𝑀 ∧ (coeff‘𝑃) = (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))))

Distinct variable groups: 𝑡,𝑗,𝑛,𝑀 𝑗,𝑁,𝑛,𝑡 𝑃,𝑛 Allowed substitution hints: 𝑃(𝑡,𝑗)

**Proof of Theorem basellem2**
Step	Hyp	Ref	Expression
1		basel.p	. . 3 ⊢ 𝑃 = (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗)))
2		ssidd 4006	. . . 4 ⊢ (𝑀 ∈ ℕ → ℂ ⊆ ℂ)
3		nnnn0 12479	. . . 4 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℕ₀)
4		elfznn0 13594	. . . . . . 7 ⊢ (𝑗 ∈ (0...𝑀) → 𝑗 ∈ ℕ₀)
5		oveq2 7417	. . . . . . . . . 10 ⊢ (𝑛 = 𝑗 → (2 · 𝑛) = (2 · 𝑗))
6	5	oveq2d 7425	. . . . . . . . 9 ⊢ (𝑛 = 𝑗 → (𝑁C(2 · 𝑛)) = (𝑁C(2 · 𝑗)))
7		oveq2 7417	. . . . . . . . . 10 ⊢ (𝑛 = 𝑗 → (𝑀 − 𝑛) = (𝑀 − 𝑗))
8	7	oveq2d 7425	. . . . . . . . 9 ⊢ (𝑛 = 𝑗 → (-1↑(𝑀 − 𝑛)) = (-1↑(𝑀 − 𝑗)))
9	6, 8	oveq12d 7427	. . . . . . . 8 ⊢ (𝑛 = 𝑗 → ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))) = ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))))
10		eqid 2733	. . . . . . . 8 ⊢ (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))) = (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))
11		ovex 7442	. . . . . . . 8 ⊢ ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) ∈ V
12	9, 10, 11	fvmpt 6999	. . . . . . 7 ⊢ (𝑗 ∈ ℕ₀ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))))
13	4, 12	syl 17	. . . . . 6 ⊢ (𝑗 ∈ (0...𝑀) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))))
14	13	adantl 483	. . . . 5 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ (0...𝑀)) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))))
15		basel.n	. . . . . . . . . . . 12 ⊢ 𝑁 = ((2 · 𝑀) + 1)
16		2nn 12285	. . . . . . . . . . . . . 14 ⊢ 2 ∈ ℕ
17		nnmulcl 12236	. . . . . . . . . . . . . 14 ⊢ ((2 ∈ ℕ ∧ 𝑀 ∈ ℕ) → (2 · 𝑀) ∈ ℕ)
18	16, 17	mpan 689	. . . . . . . . . . . . 13 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ∈ ℕ)
19	18	peano2nnd 12229	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℕ → ((2 · 𝑀) + 1) ∈ ℕ)
20	15, 19	eqeltrid 2838	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → 𝑁 ∈ ℕ)
21	20	nnnn0d 12532	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → 𝑁 ∈ ℕ₀)
22		2z 12594	. . . . . . . . . . 11 ⊢ 2 ∈ ℤ
23		nn0z 12583	. . . . . . . . . . 11 ⊢ (𝑛 ∈ ℕ₀ → 𝑛 ∈ ℤ)
24		zmulcl 12611	. . . . . . . . . . 11 ⊢ ((2 ∈ ℤ ∧ 𝑛 ∈ ℤ) → (2 · 𝑛) ∈ ℤ)
25	22, 23, 24	sylancr 588	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ₀ → (2 · 𝑛) ∈ ℤ)
26		bccl 14282	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℕ₀ ∧ (2 · 𝑛) ∈ ℤ) → (𝑁C(2 · 𝑛)) ∈ ℕ₀)
27	21, 25, 26	syl2an 597	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ ∧ 𝑛 ∈ ℕ₀) → (𝑁C(2 · 𝑛)) ∈ ℕ₀)
28	27	nn0cnd 12534	. . . . . . . 8 ⊢ ((𝑀 ∈ ℕ ∧ 𝑛 ∈ ℕ₀) → (𝑁C(2 · 𝑛)) ∈ ℂ)
29		neg1cn 12326	. . . . . . . . 9 ⊢ -1 ∈ ℂ
30		neg1ne0 12328	. . . . . . . . 9 ⊢ -1 ≠ 0
31		nnz 12579	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℤ)
32		zsubcl 12604	. . . . . . . . . 10 ⊢ ((𝑀 ∈ ℤ ∧ 𝑛 ∈ ℤ) → (𝑀 − 𝑛) ∈ ℤ)
33	31, 23, 32	syl2an 597	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℕ ∧ 𝑛 ∈ ℕ₀) → (𝑀 − 𝑛) ∈ ℤ)
34		expclz 14050	. . . . . . . . 9 ⊢ ((-1 ∈ ℂ ∧ -1 ≠ 0 ∧ (𝑀 − 𝑛) ∈ ℤ) → (-1↑(𝑀 − 𝑛)) ∈ ℂ)
35	29, 30, 33, 34	mp3an12i 1466	. . . . . . . 8 ⊢ ((𝑀 ∈ ℕ ∧ 𝑛 ∈ ℕ₀) → (-1↑(𝑀 − 𝑛)) ∈ ℂ)
36	28, 35	mulcld 11234	. . . . . . 7 ⊢ ((𝑀 ∈ ℕ ∧ 𝑛 ∈ ℕ₀) → ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))) ∈ ℂ)
37	36	fmpttd 7115	. . . . . 6 ⊢ (𝑀 ∈ ℕ → (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))):ℕ₀⟶ℂ)
38		ffvelcdm 7084	. . . . . 6 ⊢ (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))):ℕ₀⟶ℂ ∧ 𝑗 ∈ ℕ₀) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ∈ ℂ)
39	37, 4, 38	syl2an 597	. . . . 5 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ (0...𝑀)) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ∈ ℂ)
40	14, 39	eqeltrrd 2835	. . . 4 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ (0...𝑀)) → ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) ∈ ℂ)
41	2, 3, 40	elplyd 25716	. . 3 ⊢ (𝑀 ∈ ℕ → (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗))) ∈ (Poly‘ℂ))
42	1, 41	eqeltrid 2838	. 2 ⊢ (𝑀 ∈ ℕ → 𝑃 ∈ (Poly‘ℂ))
43		nnre 12219	. . . . . . . 8 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℝ)
44		nn0re 12481	. . . . . . . 8 ⊢ (𝑗 ∈ ℕ₀ → 𝑗 ∈ ℝ)
45		ltnle 11293	. . . . . . . 8 ⊢ ((𝑀 ∈ ℝ ∧ 𝑗 ∈ ℝ) → (𝑀 < 𝑗 ↔ ¬ 𝑗 ≤ 𝑀))
46	43, 44, 45	syl2an 597	. . . . . . 7 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (𝑀 < 𝑗 ↔ ¬ 𝑗 ≤ 𝑀))
47	12	ad2antlr 726	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))))
48	21	ad2antrr 725	. . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑁 ∈ ℕ₀)
49		nn0z 12583	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ ℕ₀ → 𝑗 ∈ ℤ)
50	49	ad2antlr 726	. . . . . . . . . . . 12 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑗 ∈ ℤ)
51		zmulcl 12611	. . . . . . . . . . . 12 ⊢ ((2 ∈ ℤ ∧ 𝑗 ∈ ℤ) → (2 · 𝑗) ∈ ℤ)
52	22, 50, 51	sylancr 588	. . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · 𝑗) ∈ ℤ)
53		ax-1cn 11168	. . . . . . . . . . . . . . . . 17 ⊢ 1 ∈ ℂ
54	53	2timesi 12350	. . . . . . . . . . . . . . . 16 ⊢ (2 · 1) = (1 + 1)
55	54	oveq2i 7420	. . . . . . . . . . . . . . 15 ⊢ ((2 · 𝑀) + (2 · 1)) = ((2 · 𝑀) + (1 + 1))
56		2cnd 12290	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 2 ∈ ℂ)
57		nncn 12220	. . . . . . . . . . . . . . . . 17 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℂ)
58	57	ad2antrr 725	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑀 ∈ ℂ)
59	53	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 1 ∈ ℂ)
60	56, 58, 59	adddid 11238	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · (𝑀 + 1)) = ((2 · 𝑀) + (2 · 1)))
61	15	oveq1i 7419	. . . . . . . . . . . . . . . 16 ⊢ (𝑁 + 1) = (((2 · 𝑀) + 1) + 1)
62	18	ad2antrr 725	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · 𝑀) ∈ ℕ)
63	62	nncnd 12228	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · 𝑀) ∈ ℂ)
64	63, 59, 59	addassd 11236	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (((2 · 𝑀) + 1) + 1) = ((2 · 𝑀) + (1 + 1)))
65	61, 64	eqtrid 2785	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑁 + 1) = ((2 · 𝑀) + (1 + 1)))
66	55, 60, 65	3eqtr4a 2799	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · (𝑀 + 1)) = (𝑁 + 1))
67		zltp1le 12612	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑀 ∈ ℤ ∧ 𝑗 ∈ ℤ) → (𝑀 < 𝑗 ↔ (𝑀 + 1) ≤ 𝑗))
68	31, 49, 67	syl2an 597	. . . . . . . . . . . . . . . 16 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (𝑀 < 𝑗 ↔ (𝑀 + 1) ≤ 𝑗))
69	68	biimpa 478	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑀 + 1) ≤ 𝑗)
70	43	ad2antrr 725	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑀 ∈ ℝ)
71		peano2re 11387	. . . . . . . . . . . . . . . . 17 ⊢ (𝑀 ∈ ℝ → (𝑀 + 1) ∈ ℝ)
72	70, 71	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑀 + 1) ∈ ℝ)
73	44	ad2antlr 726	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑗 ∈ ℝ)
74		2re 12286	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℝ
75		2pos 12315	. . . . . . . . . . . . . . . . . 18 ⊢ 0 < 2
76	74, 75	pm3.2i 472	. . . . . . . . . . . . . . . . 17 ⊢ (2 ∈ ℝ ∧ 0 < 2)
77	76	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 ∈ ℝ ∧ 0 < 2))
78		lemul2 12067	. . . . . . . . . . . . . . . 16 ⊢ (((𝑀 + 1) ∈ ℝ ∧ 𝑗 ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((𝑀 + 1) ≤ 𝑗 ↔ (2 · (𝑀 + 1)) ≤ (2 · 𝑗)))
79	72, 73, 77, 78	syl3anc 1372	. . . . . . . . . . . . . . 15 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → ((𝑀 + 1) ≤ 𝑗 ↔ (2 · (𝑀 + 1)) ≤ (2 · 𝑗)))
80	69, 79	mpbid 231	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (2 · (𝑀 + 1)) ≤ (2 · 𝑗))
81	66, 80	eqbrtrrd 5173	. . . . . . . . . . . . 13 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑁 + 1) ≤ (2 · 𝑗))
82	20	nnzd 12585	. . . . . . . . . . . . . . 15 ⊢ (𝑀 ∈ ℕ → 𝑁 ∈ ℤ)
83	82	ad2antrr 725	. . . . . . . . . . . . . 14 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑁 ∈ ℤ)
84		zltp1le 12612	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℤ ∧ (2 · 𝑗) ∈ ℤ) → (𝑁 < (2 · 𝑗) ↔ (𝑁 + 1) ≤ (2 · 𝑗)))
85	83, 52, 84	syl2anc 585	. . . . . . . . . . . . 13 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑁 < (2 · 𝑗) ↔ (𝑁 + 1) ≤ (2 · 𝑗)))
86	81, 85	mpbird 257	. . . . . . . . . . . 12 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → 𝑁 < (2 · 𝑗))
87	86	olcd 873	. . . . . . . . . . 11 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → ((2 · 𝑗) < 0 ∨ 𝑁 < (2 · 𝑗)))
88		bcval4 14267	. . . . . . . . . . 11 ⊢ ((𝑁 ∈ ℕ₀ ∧ (2 · 𝑗) ∈ ℤ ∧ ((2 · 𝑗) < 0 ∨ 𝑁 < (2 · 𝑗))) → (𝑁C(2 · 𝑗)) = 0)
89	48, 52, 87, 88	syl3anc 1372	. . . . . . . . . 10 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (𝑁C(2 · 𝑗)) = 0)
90	89	oveq1d 7424	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → ((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) = (0 · (-1↑(𝑀 − 𝑗))))
91		zsubcl 12604	. . . . . . . . . . . . 13 ⊢ ((𝑀 ∈ ℤ ∧ 𝑗 ∈ ℤ) → (𝑀 − 𝑗) ∈ ℤ)
92	31, 49, 91	syl2an 597	. . . . . . . . . . . 12 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (𝑀 − 𝑗) ∈ ℤ)
93		expclz 14050	. . . . . . . . . . . 12 ⊢ ((-1 ∈ ℂ ∧ -1 ≠ 0 ∧ (𝑀 − 𝑗) ∈ ℤ) → (-1↑(𝑀 − 𝑗)) ∈ ℂ)
94	29, 30, 92, 93	mp3an12i 1466	. . . . . . . . . . 11 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (-1↑(𝑀 − 𝑗)) ∈ ℂ)
95	94	adantr 482	. . . . . . . . . 10 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (-1↑(𝑀 − 𝑗)) ∈ ℂ)
96	95	mul02d 11412	. . . . . . . . 9 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → (0 · (-1↑(𝑀 − 𝑗))) = 0)
97	47, 90, 96	3eqtrd 2777	. . . . . . . 8 ⊢ (((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) ∧ 𝑀 < 𝑗) → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = 0)
98	97	ex 414	. . . . . . 7 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (𝑀 < 𝑗 → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = 0))
99	46, 98	sylbird 260	. . . . . 6 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (¬ 𝑗 ≤ 𝑀 → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) = 0))
100	99	necon1ad 2958	. . . . 5 ⊢ ((𝑀 ∈ ℕ ∧ 𝑗 ∈ ℕ₀) → (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ≠ 0 → 𝑗 ≤ 𝑀))
101	100	ralrimiva 3147	. . . 4 ⊢ (𝑀 ∈ ℕ → ∀𝑗 ∈ ℕ₀ (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ≠ 0 → 𝑗 ≤ 𝑀))
102		plyco0 25706	. . . . 5 ⊢ ((𝑀 ∈ ℕ₀ ∧ (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))):ℕ₀⟶ℂ) → (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))) “ (ℤ_≥‘(𝑀 + 1))) = {0} ↔ ∀𝑗 ∈ ℕ₀ (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ≠ 0 → 𝑗 ≤ 𝑀)))
103	3, 37, 102	syl2anc 585	. . . 4 ⊢ (𝑀 ∈ ℕ → (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))) “ (ℤ_≥‘(𝑀 + 1))) = {0} ↔ ∀𝑗 ∈ ℕ₀ (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) ≠ 0 → 𝑗 ≤ 𝑀)))
104	101, 103	mpbird 257	. . 3 ⊢ (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))) “ (ℤ_≥‘(𝑀 + 1))) = {0})
105	13	oveq1d 7424	. . . . . . 7 ⊢ (𝑗 ∈ (0...𝑀) → (((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) · (𝑡↑𝑗)) = (((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗)))
106	105	sumeq2i 15645	. . . . . 6 ⊢ Σ𝑗 ∈ (0...𝑀)(((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) · (𝑡↑𝑗)) = Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗))
107	106	mpteq2i 5254	. . . . 5 ⊢ (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) · (𝑡↑𝑗))) = (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑁C(2 · 𝑗)) · (-1↑(𝑀 − 𝑗))) · (𝑡↑𝑗)))
108	1, 107	eqtr4i 2764	. . . 4 ⊢ 𝑃 = (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) · (𝑡↑𝑗)))
109	108	a1i 11	. . 3 ⊢ (𝑀 ∈ ℕ → 𝑃 = (𝑡 ∈ ℂ ↦ Σ𝑗 ∈ (0...𝑀)(((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑗) · (𝑡↑𝑗))))
110		oveq2 7417	. . . . . . . . 9 ⊢ (𝑛 = 𝑀 → (2 · 𝑛) = (2 · 𝑀))
111	110	oveq2d 7425	. . . . . . . 8 ⊢ (𝑛 = 𝑀 → (𝑁C(2 · 𝑛)) = (𝑁C(2 · 𝑀)))
112		oveq2 7417	. . . . . . . . 9 ⊢ (𝑛 = 𝑀 → (𝑀 − 𝑛) = (𝑀 − 𝑀))
113	112	oveq2d 7425	. . . . . . . 8 ⊢ (𝑛 = 𝑀 → (-1↑(𝑀 − 𝑛)) = (-1↑(𝑀 − 𝑀)))
114	111, 113	oveq12d 7427	. . . . . . 7 ⊢ (𝑛 = 𝑀 → ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))) = ((𝑁C(2 · 𝑀)) · (-1↑(𝑀 − 𝑀))))
115		ovex 7442	. . . . . . 7 ⊢ ((𝑁C(2 · 𝑀)) · (-1↑(𝑀 − 𝑀))) ∈ V
116	114, 10, 115	fvmpt 6999	. . . . . 6 ⊢ (𝑀 ∈ ℕ₀ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑀) = ((𝑁C(2 · 𝑀)) · (-1↑(𝑀 − 𝑀))))
117	3, 116	syl 17	. . . . 5 ⊢ (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑀) = ((𝑁C(2 · 𝑀)) · (-1↑(𝑀 − 𝑀))))
118	57	subidd 11559	. . . . . . . 8 ⊢ (𝑀 ∈ ℕ → (𝑀 − 𝑀) = 0)
119	118	oveq2d 7425	. . . . . . 7 ⊢ (𝑀 ∈ ℕ → (-1↑(𝑀 − 𝑀)) = (-1↑0))
120		exp0 14031	. . . . . . . 8 ⊢ (-1 ∈ ℂ → (-1↑0) = 1)
121	29, 120	ax-mp 5	. . . . . . 7 ⊢ (-1↑0) = 1
122	119, 121	eqtrdi 2789	. . . . . 6 ⊢ (𝑀 ∈ ℕ → (-1↑(𝑀 − 𝑀)) = 1)
123	122	oveq2d 7425	. . . . 5 ⊢ (𝑀 ∈ ℕ → ((𝑁C(2 · 𝑀)) · (-1↑(𝑀 − 𝑀))) = ((𝑁C(2 · 𝑀)) · 1))
124	18	nnred 12227	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ∈ ℝ)
125	124	lep1d 12145	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ≤ ((2 · 𝑀) + 1))
126	125, 15	breqtrrdi 5191	. . . . . . . . 9 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ≤ 𝑁)
127	18	nnnn0d 12532	. . . . . . . . . . 11 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ∈ ℕ₀)
128		nn0uz 12864	. . . . . . . . . . 11 ⊢ ℕ₀ = (ℤ_≥‘0)
129	127, 128	eleqtrdi 2844	. . . . . . . . . 10 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ∈ (ℤ_≥‘0))
130		elfz5 13493	. . . . . . . . . 10 ⊢ (((2 · 𝑀) ∈ (ℤ_≥‘0) ∧ 𝑁 ∈ ℤ) → ((2 · 𝑀) ∈ (0...𝑁) ↔ (2 · 𝑀) ≤ 𝑁))
131	129, 82, 130	syl2anc 585	. . . . . . . . 9 ⊢ (𝑀 ∈ ℕ → ((2 · 𝑀) ∈ (0...𝑁) ↔ (2 · 𝑀) ≤ 𝑁))
132	126, 131	mpbird 257	. . . . . . . 8 ⊢ (𝑀 ∈ ℕ → (2 · 𝑀) ∈ (0...𝑁))
133		bccl2 14283	. . . . . . . 8 ⊢ ((2 · 𝑀) ∈ (0...𝑁) → (𝑁C(2 · 𝑀)) ∈ ℕ)
134	132, 133	syl 17	. . . . . . 7 ⊢ (𝑀 ∈ ℕ → (𝑁C(2 · 𝑀)) ∈ ℕ)
135	134	nncnd 12228	. . . . . 6 ⊢ (𝑀 ∈ ℕ → (𝑁C(2 · 𝑀)) ∈ ℂ)
136	135	mulridd 11231	. . . . 5 ⊢ (𝑀 ∈ ℕ → ((𝑁C(2 · 𝑀)) · 1) = (𝑁C(2 · 𝑀)))
137	117, 123, 136	3eqtrd 2777	. . . 4 ⊢ (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑀) = (𝑁C(2 · 𝑀)))
138	134	nnne0d 12262	. . . 4 ⊢ (𝑀 ∈ ℕ → (𝑁C(2 · 𝑀)) ≠ 0)
139	137, 138	eqnetrd 3009	. . 3 ⊢ (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))‘𝑀) ≠ 0)
140	42, 3, 37, 104, 109, 139	dgreq 25758	. 2 ⊢ (𝑀 ∈ ℕ → (deg‘𝑃) = 𝑀)
141	42, 3, 37, 104, 109	coeeq 25741	. 2 ⊢ (𝑀 ∈ ℕ → (coeff‘𝑃) = (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛)))))
142	42, 140, 141	3jca 1129	1 ⊢ (𝑀 ∈ ℕ → (𝑃 ∈ (Poly‘ℂ) ∧ (deg‘𝑃) = 𝑀 ∧ (coeff‘𝑃) = (𝑛 ∈ ℕ₀ ↦ ((𝑁C(2 · 𝑛)) · (-1↑(𝑀 − 𝑛))))))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 {csn 4629 class class class wbr 5149 ↦ cmpt 5232 “ cima 5680 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 + caddc 11113 · cmul 11115 < clt 11248 ≤ cle 11249 − cmin 11444 -cneg 11445 ℕcn 12212 2c2 12267 ℕ₀cn0 12472 ℤcz 12558 ℤ_≥cuz 12822 ...cfz 13484 ↑cexp 14027 Ccbc 14262 Σcsu 15632 Polycply 25698 coeffccoe 25700 degcdgr 25701

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 ax-pre-sup 11188

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-rmo 3377 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-of 7670 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-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-inf 9438 df-oi 9505 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-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-fz 13485 df-fzo 13628 df-fl 13757 df-seq 13967 df-exp 14028 df-fac 14234 df-bc 14263 df-hash 14291 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-rlim 15433 df-sum 15633 df-0p 25187 df-ply 25702 df-coe 25704 df-dgr 25705

This theorem is referenced by: basellem4 26588 basellem5 26589

W3C validator