Properties

Label 2-20-20.19-c8-0-10
Degree $2$
Conductor $20$
Sign $1$
Analytic cond. $8.14757$
Root an. cond. $2.85439$
Motivic weight $8$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 16·2-s − 158·3-s + 256·4-s + 625·5-s − 2.52e3·6-s + 1.92e3·7-s + 4.09e3·8-s + 1.84e4·9-s + 1.00e4·10-s − 4.04e4·12-s + 3.07e4·14-s − 9.87e4·15-s + 6.55e4·16-s + 2.94e5·18-s + 1.60e5·20-s − 3.03e5·21-s + 2.11e5·23-s − 6.47e5·24-s + 3.90e5·25-s − 1.87e6·27-s + 4.92e5·28-s + 2.06e4·29-s − 1.58e6·30-s + 1.04e6·32-s + 1.20e6·35-s + 4.71e6·36-s + 2.56e6·40-s + ⋯
L(s)  = 1  + 2-s − 1.95·3-s + 4-s + 5-s − 1.95·6-s + 0.800·7-s + 8-s + 2.80·9-s + 10-s − 1.95·12-s + 0.800·14-s − 1.95·15-s + 16-s + 2.80·18-s + 20-s − 1.56·21-s + 0.754·23-s − 1.95·24-s + 25-s − 3.52·27-s + 0.800·28-s + 0.0291·29-s − 1.95·30-s + 32-s + 0.800·35-s + 2.80·36-s + 40-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 20 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(9-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 20 ^{s/2} \, \Gamma_{\C}(s+4) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(20\)    =    \(2^{2} \cdot 5\)
Sign: $1$
Analytic conductor: \(8.14757\)
Root analytic conductor: \(2.85439\)
Motivic weight: \(8\)
Rational: yes
Arithmetic: yes
Character: $\chi_{20} (19, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 20,\ (\ :4),\ 1)\)

Particular Values

\(L(\frac{9}{2})\) \(\approx\) \(2.244149845\)
\(L(\frac12)\) \(\approx\) \(2.244149845\)
\(L(5)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 - p^{4} T \)
5 \( 1 - p^{4} T \)
good3 \( 1 + 158 T + p^{8} T^{2} \)
7 \( 1 - 1922 T + p^{8} T^{2} \)
11 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
13 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
17 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
19 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
23 \( 1 - 211202 T + p^{8} T^{2} \)
29 \( 1 - 20642 T + p^{8} T^{2} \)
31 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
37 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
41 \( 1 + 5419198 T + p^{8} T^{2} \)
43 \( 1 + 2519518 T + p^{8} T^{2} \)
47 \( 1 - 9618242 T + p^{8} T^{2} \)
53 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
59 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
61 \( 1 + 11061598 T + p^{8} T^{2} \)
67 \( 1 + 20249758 T + p^{8} T^{2} \)
71 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
73 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
79 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
83 \( 1 + 30884638 T + p^{8} T^{2} \)
89 \( 1 + 106804798 T + p^{8} T^{2} \)
97 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
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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

−16.65350679147157346115621089045, −15.21953234335163190276189936163, −13.55779042742631229975668943981, −12.36428359379217060600695756504, −11.25671715488024942488687333267, −10.28519150065569895686899938225, −6.93167709606085666757547636599, −5.70411339529797158914340849748, −4.76336404511036741713062647681, −1.46596107424358911018234213914, 1.46596107424358911018234213914, 4.76336404511036741713062647681, 5.70411339529797158914340849748, 6.93167709606085666757547636599, 10.28519150065569895686899938225, 11.25671715488024942488687333267, 12.36428359379217060600695756504, 13.55779042742631229975668943981, 15.21953234335163190276189936163, 16.65350679147157346115621089045

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