Properties

Label 2-18-1.1-c25-0-2
Degree $2$
Conductor $18$
Sign $1$
Analytic cond. $71.2794$
Root an. cond. $8.44271$
Motivic weight $25$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 4.09e3·2-s + 1.67e7·4-s + 5.87e8·5-s − 6.29e10·7-s + 6.87e10·8-s + 2.40e12·10-s − 1.65e13·11-s + 6.25e13·13-s − 2.57e14·14-s + 2.81e14·16-s + 4.12e15·17-s + 1.78e16·19-s + 9.84e15·20-s − 6.77e16·22-s − 5.26e16·23-s + 4.66e16·25-s + 2.56e17·26-s − 1.05e18·28-s + 4.67e15·29-s + 5.16e18·31-s + 1.15e18·32-s + 1.68e19·34-s − 3.69e19·35-s − 1.72e19·37-s + 7.32e19·38-s + 4.03e19·40-s + 1.59e20·41-s + ⋯
L(s)  = 1  + 0.707·2-s + 0.5·4-s + 1.07·5-s − 1.71·7-s + 0.353·8-s + 0.760·10-s − 1.59·11-s + 0.744·13-s − 1.21·14-s + 0.250·16-s + 1.71·17-s + 1.85·19-s + 0.537·20-s − 1.12·22-s − 0.501·23-s + 0.156·25-s + 0.526·26-s − 0.859·28-s + 0.00245·29-s + 1.17·31-s + 0.176·32-s + 1.21·34-s − 1.84·35-s − 0.429·37-s + 1.31·38-s + 0.380·40-s + 1.10·41-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(26-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s+25/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(18\)    =    \(2 \cdot 3^{2}\)
Sign: $1$
Analytic conductor: \(71.2794\)
Root analytic conductor: \(8.44271\)
Motivic weight: \(25\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 18,\ (\ :25/2),\ 1)\)

Particular Values

\(L(13)\) \(\approx\) \(3.563120465\)
\(L(\frac12)\) \(\approx\) \(3.563120465\)
\(L(\frac{27}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 - 4.09e3T \)
3 \( 1 \)
good5 \( 1 - 5.87e8T + 2.98e17T^{2} \)
7 \( 1 + 6.29e10T + 1.34e21T^{2} \)
11 \( 1 + 1.65e13T + 1.08e26T^{2} \)
13 \( 1 - 6.25e13T + 7.05e27T^{2} \)
17 \( 1 - 4.12e15T + 5.77e30T^{2} \)
19 \( 1 - 1.78e16T + 9.30e31T^{2} \)
23 \( 1 + 5.26e16T + 1.10e34T^{2} \)
29 \( 1 - 4.67e15T + 3.63e36T^{2} \)
31 \( 1 - 5.16e18T + 1.92e37T^{2} \)
37 \( 1 + 1.72e19T + 1.60e39T^{2} \)
41 \( 1 - 1.59e20T + 2.08e40T^{2} \)
43 \( 1 - 3.44e20T + 6.86e40T^{2} \)
47 \( 1 + 4.59e20T + 6.34e41T^{2} \)
53 \( 1 - 4.24e21T + 1.27e43T^{2} \)
59 \( 1 - 6.73e19T + 1.86e44T^{2} \)
61 \( 1 + 8.44e21T + 4.29e44T^{2} \)
67 \( 1 - 5.11e21T + 4.48e45T^{2} \)
71 \( 1 + 4.17e22T + 1.91e46T^{2} \)
73 \( 1 + 1.19e22T + 3.82e46T^{2} \)
79 \( 1 + 1.70e23T + 2.75e47T^{2} \)
83 \( 1 - 1.85e24T + 9.48e47T^{2} \)
89 \( 1 - 3.40e23T + 5.42e48T^{2} \)
97 \( 1 - 4.10e24T + 4.66e49T^{2} \)
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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

−13.29025538356573260248694355174, −12.24320438906440205358758488022, −10.31725692648059729657034143457, −9.643163398822211696697852209018, −7.58596706035431859201240617467, −6.05470537866162515811727376052, −5.45172572036970947509797552040, −3.40539839003672201218571436173, −2.61672789267756907276522717569, −0.891863108533529031959436572112, 0.891863108533529031959436572112, 2.61672789267756907276522717569, 3.40539839003672201218571436173, 5.45172572036970947509797552040, 6.05470537866162515811727376052, 7.58596706035431859201240617467, 9.643163398822211696697852209018, 10.31725692648059729657034143457, 12.24320438906440205358758488022, 13.29025538356573260248694355174

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