Properties

Label 2-15-1.1-c5-0-3
Degree $2$
Conductor $15$
Sign $-1$
Analytic cond. $2.40575$
Root an. cond. $1.55105$
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  − 2·2-s − 9·3-s − 28·4-s − 25·5-s + 18·6-s − 132·7-s + 120·8-s + 81·9-s + 50·10-s + 472·11-s + 252·12-s − 686·13-s + 264·14-s + 225·15-s + 656·16-s − 1.56e3·17-s − 162·18-s − 2.18e3·19-s + 700·20-s + 1.18e3·21-s − 944·22-s + 264·23-s − 1.08e3·24-s + 625·25-s + 1.37e3·26-s − 729·27-s + 3.69e3·28-s + ⋯
L(s)  = 1  − 0.353·2-s − 0.577·3-s − 7/8·4-s − 0.447·5-s + 0.204·6-s − 1.01·7-s + 0.662·8-s + 1/3·9-s + 0.158·10-s + 1.17·11-s + 0.505·12-s − 1.12·13-s + 0.359·14-s + 0.258·15-s + 0.640·16-s − 1.31·17-s − 0.117·18-s − 1.38·19-s + 0.391·20-s + 0.587·21-s − 0.415·22-s + 0.104·23-s − 0.382·24-s + 1/5·25-s + 0.398·26-s − 0.192·27-s + 0.890·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 15 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(6-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 15 ^{s/2} \, \Gamma_{\C}(s+5/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(15\)    =    \(3 \cdot 5\)
Sign: $-1$
Analytic conductor: \(2.40575\)
Root analytic conductor: \(1.55105\)
Motivic weight: \(5\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 15,\ (\ :5/2),\ -1)\)

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)$
bad3 \( 1 + p^{2} T \)
5 \( 1 + p^{2} T \)
good2 \( 1 + p T + p^{5} T^{2} \)
7 \( 1 + 132 T + p^{5} T^{2} \)
11 \( 1 - 472 T + p^{5} T^{2} \)
13 \( 1 + 686 T + p^{5} T^{2} \)
17 \( 1 + 1562 T + p^{5} T^{2} \)
19 \( 1 + 2180 T + p^{5} T^{2} \)
23 \( 1 - 264 T + p^{5} T^{2} \)
29 \( 1 - 170 T + p^{5} T^{2} \)
31 \( 1 - 7272 T + p^{5} T^{2} \)
37 \( 1 + 142 T + p^{5} T^{2} \)
41 \( 1 + 16198 T + p^{5} T^{2} \)
43 \( 1 + 10316 T + p^{5} T^{2} \)
47 \( 1 - 18568 T + p^{5} T^{2} \)
53 \( 1 - 21514 T + p^{5} T^{2} \)
59 \( 1 - 34600 T + p^{5} T^{2} \)
61 \( 1 + 35738 T + p^{5} T^{2} \)
67 \( 1 + 5772 T + p^{5} T^{2} \)
71 \( 1 + 69088 T + p^{5} T^{2} \)
73 \( 1 + 70526 T + p^{5} T^{2} \)
79 \( 1 - 47640 T + p^{5} T^{2} \)
83 \( 1 - 74004 T + p^{5} T^{2} \)
89 \( 1 + 90030 T + p^{5} T^{2} \)
97 \( 1 + 33502 T + p^{5} T^{2} \)
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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

−17.48841249195048666411803783111, −16.70804256084611237851489891586, −15.05725837507799007067983190145, −13.32379307699233665460796833533, −12.04621202083319274507530947614, −10.20194959454477331101819983496, −8.854131747055328688060587257470, −6.71144390140536460468990038079, −4.35806742067215223865182507911, 0, 4.35806742067215223865182507911, 6.71144390140536460468990038079, 8.854131747055328688060587257470, 10.20194959454477331101819983496, 12.04621202083319274507530947614, 13.32379307699233665460796833533, 15.05725837507799007067983190145, 16.70804256084611237851489891586, 17.48841249195048666411803783111

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