Properties

Label 2-18-1.1-c5-0-2
Degree $2$
Conductor $18$
Sign $-1$
Analytic cond. $2.88690$
Root an. cond. $1.69909$
Motivic weight $5$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 4·2-s + 16·4-s − 96·5-s − 148·7-s − 64·8-s + 384·10-s + 384·11-s − 334·13-s + 592·14-s + 256·16-s + 576·17-s − 664·19-s − 1.53e3·20-s − 1.53e3·22-s − 3.84e3·23-s + 6.09e3·25-s + 1.33e3·26-s − 2.36e3·28-s + 96·29-s − 4.56e3·31-s − 1.02e3·32-s − 2.30e3·34-s + 1.42e4·35-s + 5.79e3·37-s + 2.65e3·38-s + 6.14e3·40-s − 6.72e3·41-s + ⋯
L(s)  = 1  − 0.707·2-s + 1/2·4-s − 1.71·5-s − 1.14·7-s − 0.353·8-s + 1.21·10-s + 0.956·11-s − 0.548·13-s + 0.807·14-s + 1/4·16-s + 0.483·17-s − 0.421·19-s − 0.858·20-s − 0.676·22-s − 1.51·23-s + 1.94·25-s + 0.387·26-s − 0.570·28-s + 0.0211·29-s − 0.852·31-s − 0.176·32-s − 0.341·34-s + 1.96·35-s + 0.696·37-s + 0.298·38-s + 0.607·40-s − 0.624·41-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(6-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s+5/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(18\)    =    \(2 \cdot 3^{2}\)
Sign: $-1$
Analytic conductor: \(2.88690\)
Root analytic conductor: \(1.69909\)
Motivic weight: \(5\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 18,\ (\ :5/2),\ -1)\)

Particular Values

\(L(3)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{7}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + p^{2} T \)
3 \( 1 \)
good5 \( 1 + 96 T + p^{5} T^{2} \)
7 \( 1 + 148 T + p^{5} T^{2} \)
11 \( 1 - 384 T + p^{5} T^{2} \)
13 \( 1 + 334 T + p^{5} T^{2} \)
17 \( 1 - 576 T + p^{5} T^{2} \)
19 \( 1 + 664 T + p^{5} T^{2} \)
23 \( 1 + 3840 T + p^{5} T^{2} \)
29 \( 1 - 96 T + p^{5} T^{2} \)
31 \( 1 + 4564 T + p^{5} T^{2} \)
37 \( 1 - 5798 T + p^{5} T^{2} \)
41 \( 1 + 6720 T + p^{5} T^{2} \)
43 \( 1 + 14872 T + p^{5} T^{2} \)
47 \( 1 + 19200 T + p^{5} T^{2} \)
53 \( 1 - 7776 T + p^{5} T^{2} \)
59 \( 1 + 13056 T + p^{5} T^{2} \)
61 \( 1 - 42782 T + p^{5} T^{2} \)
67 \( 1 - 36656 T + p^{5} T^{2} \)
71 \( 1 - 64512 T + p^{5} T^{2} \)
73 \( 1 + 16810 T + p^{5} T^{2} \)
79 \( 1 - 28076 T + p^{5} T^{2} \)
83 \( 1 + 66432 T + p^{5} T^{2} \)
89 \( 1 + 81792 T + p^{5} T^{2} \)
97 \( 1 + 29938 T + p^{5} T^{2} \)
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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

−16.75445448576702964036517719913, −15.96795739939874037419891435650, −14.76553033598573390057489832646, −12.48662773034435877154766959503, −11.51803113905496526460211145965, −9.790234785449560281509264499784, −8.189669401097740466925236093176, −6.78707852685687905649234866643, −3.68613502464121962042518342836, 0, 3.68613502464121962042518342836, 6.78707852685687905649234866643, 8.189669401097740466925236093176, 9.790234785449560281509264499784, 11.51803113905496526460211145965, 12.48662773034435877154766959503, 14.76553033598573390057489832646, 15.96795739939874037419891435650, 16.75445448576702964036517719913

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