Properties

Label 2-1680-21.20-c1-0-8
Degree $2$
Conductor $1680$
Sign $-0.487 - 0.872i$
Analytic cond. $13.4148$
Root an. cond. $3.66263$
Motivic weight $1$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−1.61 + 0.618i)3-s − 5-s + (0.381 + 2.61i)7-s + (2.23 − 2.00i)9-s + 0.763i·11-s − 1.23i·13-s + (1.61 − 0.618i)15-s + 4.47·17-s + 7.23i·19-s + (−2.23 − 4i)21-s − 7.70i·23-s + 25-s + (−2.38 + 4.61i)27-s + 4i·29-s − 3.23i·31-s + ⋯
L(s)  = 1  + (−0.934 + 0.356i)3-s − 0.447·5-s + (0.144 + 0.989i)7-s + (0.745 − 0.666i)9-s + 0.230i·11-s − 0.342i·13-s + (0.417 − 0.159i)15-s + 1.08·17-s + 1.66i·19-s + (−0.487 − 0.872i)21-s − 1.60i·23-s + 0.200·25-s + (−0.458 + 0.888i)27-s + 0.742i·29-s − 0.581i·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 1680 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.487 - 0.872i)\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 1680 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & (-0.487 - 0.872i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(1680\)    =    \(2^{4} \cdot 3 \cdot 5 \cdot 7\)
Sign: $-0.487 - 0.872i$
Analytic conductor: \(13.4148\)
Root analytic conductor: \(3.66263\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{1680} (881, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 1680,\ (\ :1/2),\ -0.487 - 0.872i)\)

Particular Values

\(L(1)\) \(\approx\) \(0.8897992661\)
\(L(\frac12)\) \(\approx\) \(0.8897992661\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
3 \( 1 + (1.61 - 0.618i)T \)
5 \( 1 + T \)
7 \( 1 + (-0.381 - 2.61i)T \)
good11 \( 1 - 0.763iT - 11T^{2} \)
13 \( 1 + 1.23iT - 13T^{2} \)
17 \( 1 - 4.47T + 17T^{2} \)
19 \( 1 - 7.23iT - 19T^{2} \)
23 \( 1 + 7.70iT - 23T^{2} \)
29 \( 1 - 4iT - 29T^{2} \)
31 \( 1 + 3.23iT - 31T^{2} \)
37 \( 1 - 4.47T + 37T^{2} \)
41 \( 1 + 3.52T + 41T^{2} \)
43 \( 1 - 7.23T + 43T^{2} \)
47 \( 1 - 3.23T + 47T^{2} \)
53 \( 1 - 9.23iT - 53T^{2} \)
59 \( 1 + 8.94T + 59T^{2} \)
61 \( 1 - 4.94iT - 61T^{2} \)
67 \( 1 + 9.70T + 67T^{2} \)
71 \( 1 - 12.1iT - 71T^{2} \)
73 \( 1 - 6.76iT - 73T^{2} \)
79 \( 1 + 10.4T + 79T^{2} \)
83 \( 1 - 7.23T + 83T^{2} \)
89 \( 1 + 12.4T + 89T^{2} \)
97 \( 1 - 14.1iT - 97T^{2} \)
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   \(L(s) = \displaystyle\prod_p \ \prod_{j=1}^{2} (1 - \alpha_{j,p}\, p^{-s})^{-1}\)

Imaginary part of the first few zeros on the critical line

−9.772749743094194075304034127343, −8.837236527526919782465460527493, −8.028839224247582396863212747368, −7.23384364444081227500280248381, −6.04683960090980914721810476968, −5.72408308608106263254591548046, −4.71536588716408887625747386516, −3.89352038671615396973922179673, −2.74515150645285011540653528066, −1.23599390436585876707035182937, 0.44804905963055870649673793483, 1.53147725854061143074148867374, 3.15419947570887438882220295264, 4.21701139412991818773128086002, 4.95546601016601073700922742429, 5.85709392413878761029986858692, 6.80839574406470778379936640531, 7.43573288921343419416508140460, 7.961101993895220164198444168481, 9.214504908234327098902604345639

Graph of the $Z$-function along the critical line