Properties

Label 2-18-1.1-c15-0-4
Degree $2$
Conductor $18$
Sign $-1$
Analytic cond. $25.6848$
Root an. cond. $5.06802$
Motivic weight $15$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 128·2-s + 1.63e4·4-s + 1.14e5·5-s − 3.03e6·7-s − 2.09e6·8-s − 1.46e7·10-s + 1.03e8·11-s − 1.04e8·13-s + 3.88e8·14-s + 2.68e8·16-s − 9.97e8·17-s + 4.93e9·19-s + 1.88e9·20-s − 1.32e10·22-s − 8.32e9·23-s − 1.73e10·25-s + 1.33e10·26-s − 4.97e10·28-s − 1.04e11·29-s − 2.96e11·31-s − 3.43e10·32-s + 1.27e11·34-s − 3.48e11·35-s − 1.78e11·37-s − 6.31e11·38-s − 2.40e11·40-s + 1.79e12·41-s + ⋯
L(s)  = 1  − 0.707·2-s + 1/2·4-s + 0.657·5-s − 1.39·7-s − 0.353·8-s − 0.464·10-s + 1.60·11-s − 0.461·13-s + 0.984·14-s + 1/4·16-s − 0.589·17-s + 1.26·19-s + 0.328·20-s − 1.13·22-s − 0.509·23-s − 0.568·25-s + 0.326·26-s − 0.696·28-s − 1.12·29-s − 1.93·31-s − 0.176·32-s + 0.416·34-s − 0.915·35-s − 0.308·37-s − 0.895·38-s − 0.232·40-s + 1.43·41-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(16-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 18 ^{s/2} \, \Gamma_{\C}(s+15/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(18\)    =    \(2 \cdot 3^{2}\)
Sign: $-1$
Analytic conductor: \(25.6848\)
Root analytic conductor: \(5.06802\)
Motivic weight: \(15\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 18,\ (\ :15/2),\ -1)\)

Particular Values

\(L(8)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{17}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + p^{7} T \)
3 \( 1 \)
good5 \( 1 - 22962 p T + p^{15} T^{2} \)
7 \( 1 + 433504 p T + p^{15} T^{2} \)
11 \( 1 - 9404700 p T + p^{15} T^{2} \)
13 \( 1 + 104365834 T + p^{15} T^{2} \)
17 \( 1 + 997689762 T + p^{15} T^{2} \)
19 \( 1 - 4934015444 T + p^{15} T^{2} \)
23 \( 1 + 8324920200 T + p^{15} T^{2} \)
29 \( 1 + 104128242846 T + p^{15} T^{2} \)
31 \( 1 + 296696681512 T + p^{15} T^{2} \)
37 \( 1 + 178337455666 T + p^{15} T^{2} \)
41 \( 1 - 1790882416086 T + p^{15} T^{2} \)
43 \( 1 + 2863459422772 T + p^{15} T^{2} \)
47 \( 1 + 4332907521600 T + p^{15} T^{2} \)
53 \( 1 + 9732317104422 T + p^{15} T^{2} \)
59 \( 1 - 13514837176500 T + p^{15} T^{2} \)
61 \( 1 - 5352663511190 T + p^{15} T^{2} \)
67 \( 1 + 53233909720108 T + p^{15} T^{2} \)
71 \( 1 - 20229661643400 T + p^{15} T^{2} \)
73 \( 1 - 26264166466106 T + p^{15} T^{2} \)
79 \( 1 + 339031361615128 T + p^{15} T^{2} \)
83 \( 1 + 131684771045076 T + p^{15} T^{2} \)
89 \( 1 - 39352148322678 T + p^{15} T^{2} \)
97 \( 1 - 1128750908801474 T + p^{15} T^{2} \)
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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

−14.44608424228158742869394723632, −12.98983876133781325923922177900, −11.56502509819906390217605032945, −9.769425179431190076795337099692, −9.232833537558887637727500075404, −7.10612677814630602534557530191, −5.96793062290413971209930034306, −3.48802857473852271989012553066, −1.72362200652957003888212208484, 0, 1.72362200652957003888212208484, 3.48802857473852271989012553066, 5.96793062290413971209930034306, 7.10612677814630602534557530191, 9.232833537558887637727500075404, 9.769425179431190076795337099692, 11.56502509819906390217605032945, 12.98983876133781325923922177900, 14.44608424228158742869394723632

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