Properties

Label 2-768-3.2-c2-0-3
Degree $2$
Conductor $768$
Sign $i$
Analytic cond. $20.9264$
Root an. cond. $4.57454$
Motivic weight $2$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 3i·3-s + 9.79i·5-s − 9.79·7-s − 9·9-s − 10i·11-s − 29.3·15-s − 29.3i·21-s − 70.9·25-s − 27i·27-s + 29.3i·29-s + 48.9·31-s + 30·33-s − 95.9i·35-s − 88.1i·45-s + 46.9·49-s + ⋯
L(s)  = 1  + i·3-s + 1.95i·5-s − 1.39·7-s − 9-s − 0.909i·11-s − 1.95·15-s − 1.39i·21-s − 2.83·25-s i·27-s + 1.01i·29-s + 1.58·31-s + 0.909·33-s − 2.74i·35-s − 1.95i·45-s + 0.959·49-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 768 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(3-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 768 ^{s/2} \, \Gamma_{\C}(s+1) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(768\)    =    \(2^{8} \cdot 3\)
Sign: $i$
Analytic conductor: \(20.9264\)
Root analytic conductor: \(4.57454\)
Motivic weight: \(2\)
Rational: no
Arithmetic: yes
Character: $\chi_{768} (257, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 768,\ (\ :1),\ i)\)

Particular Values

\(L(\frac{3}{2})\) \(\approx\) \(0.2898362054\)
\(L(\frac12)\) \(\approx\) \(0.2898362054\)
\(L(2)\) 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 \( 1 - 3iT \)
good5 \( 1 - 9.79iT - 25T^{2} \)
7 \( 1 + 9.79T + 49T^{2} \)
11 \( 1 + 10iT - 121T^{2} \)
13 \( 1 + 169T^{2} \)
17 \( 1 - 289T^{2} \)
19 \( 1 + 361T^{2} \)
23 \( 1 - 529T^{2} \)
29 \( 1 - 29.3iT - 841T^{2} \)
31 \( 1 - 48.9T + 961T^{2} \)
37 \( 1 + 1.36e3T^{2} \)
41 \( 1 - 1.68e3T^{2} \)
43 \( 1 + 1.84e3T^{2} \)
47 \( 1 - 2.20e3T^{2} \)
53 \( 1 - 48.9iT - 2.80e3T^{2} \)
59 \( 1 - 10iT - 3.48e3T^{2} \)
61 \( 1 + 3.72e3T^{2} \)
67 \( 1 + 4.48e3T^{2} \)
71 \( 1 - 5.04e3T^{2} \)
73 \( 1 - 50T + 5.32e3T^{2} \)
79 \( 1 + 146.T + 6.24e3T^{2} \)
83 \( 1 + 134iT - 6.88e3T^{2} \)
89 \( 1 - 7.92e3T^{2} \)
97 \( 1 + 190T + 9.40e3T^{2} \)
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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

−10.60827290415047846712012902473, −10.06408642349860453590392104551, −9.368689464396729755578478336570, −8.281053992530817518595560433121, −7.06078171496695811520098921737, −6.34587557582351794192150162416, −5.71215677963127949448227127915, −4.07920436684709921228889629293, −3.11588512271652252535931808828, −2.84301004805953083384220407234, 0.10600952914724515712064259538, 1.19223801147582588829362454783, 2.47511190199634920862391305671, 3.98781826644288936700706114251, 5.04558531047826324353954237825, 5.98697049948334246615111535098, 6.80343459078781721046290642104, 7.892906539864204456003891662235, 8.551613446380586435805910516194, 9.470476573326477578139759850511

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