Properties

Label 2-20-1.1-c7-0-2
Degree $2$
Conductor $20$
Sign $-1$
Analytic cond. $6.24770$
Root an. cond. $2.49954$
Motivic weight $7$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 6·3-s − 125·5-s − 706·7-s − 2.15e3·9-s − 3.84e3·11-s − 4.05e3·13-s + 750·15-s + 858·17-s + 2.10e4·19-s + 4.23e3·21-s + 8.53e4·23-s + 1.56e4·25-s + 2.60e4·27-s − 8.31e4·29-s − 1.45e5·31-s + 2.30e4·33-s + 8.82e4·35-s − 4.98e5·37-s + 2.43e4·39-s − 6.89e5·41-s + 8.67e5·43-s + 2.68e5·45-s + 2.35e5·47-s − 3.25e5·49-s − 5.14e3·51-s + 1.83e6·53-s + 4.80e5·55-s + ⋯
L(s)  = 1  − 0.128·3-s − 0.447·5-s − 0.777·7-s − 0.983·9-s − 0.869·11-s − 0.511·13-s + 0.0573·15-s + 0.0423·17-s + 0.703·19-s + 0.0998·21-s + 1.46·23-s + 1/5·25-s + 0.254·27-s − 0.632·29-s − 0.877·31-s + 0.111·33-s + 0.347·35-s − 1.61·37-s + 0.0656·39-s − 1.56·41-s + 1.66·43-s + 0.439·45-s + 0.331·47-s − 0.394·49-s − 0.00543·51-s + 1.69·53-s + 0.389·55-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 20 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(8-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 20 ^{s/2} \, \Gamma_{\C}(s+7/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(20\)    =    \(2^{2} \cdot 5\)
Sign: $-1$
Analytic conductor: \(6.24770\)
Root analytic conductor: \(2.49954\)
Motivic weight: \(7\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 20,\ (\ :7/2),\ -1)\)

Particular Values

\(L(4)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{9}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
5 \( 1 + p^{3} T \)
good3 \( 1 + 2 p T + p^{7} T^{2} \)
7 \( 1 + 706 T + p^{7} T^{2} \)
11 \( 1 + 3840 T + p^{7} T^{2} \)
13 \( 1 + 4054 T + p^{7} T^{2} \)
17 \( 1 - 858 T + p^{7} T^{2} \)
19 \( 1 - 21044 T + p^{7} T^{2} \)
23 \( 1 - 85338 T + p^{7} T^{2} \)
29 \( 1 + 83106 T + p^{7} T^{2} \)
31 \( 1 + 145564 T + p^{7} T^{2} \)
37 \( 1 + 498886 T + p^{7} T^{2} \)
41 \( 1 + 689514 T + p^{7} T^{2} \)
43 \( 1 - 867890 T + p^{7} T^{2} \)
47 \( 1 - 235638 T + p^{7} T^{2} \)
53 \( 1 - 1835442 T + p^{7} T^{2} \)
59 \( 1 - 629508 T + p^{7} T^{2} \)
61 \( 1 + 2667958 T + p^{7} T^{2} \)
67 \( 1 + 3373306 T + p^{7} T^{2} \)
71 \( 1 + 2600052 T + p^{7} T^{2} \)
73 \( 1 + 1628494 T + p^{7} T^{2} \)
79 \( 1 + 4243528 T + p^{7} T^{2} \)
83 \( 1 - 1251378 T + p^{7} T^{2} \)
89 \( 1 - 6299466 T + p^{7} T^{2} \)
97 \( 1 - 3976514 T + p^{7} T^{2} \)
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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

−16.11926156201945423644462005440, −14.89187090979002714163842970038, −13.36170284341984065725432056591, −12.04166270268098883293376560775, −10.64066508488684889557659036787, −8.982528324378152932952503332690, −7.28684531621546518153923147505, −5.39535653156903583706573226439, −3.08067214782226389550549934745, 0, 3.08067214782226389550549934745, 5.39535653156903583706573226439, 7.28684531621546518153923147505, 8.982528324378152932952503332690, 10.64066508488684889557659036787, 12.04166270268098883293376560775, 13.36170284341984065725432056591, 14.89187090979002714163842970038, 16.11926156201945423644462005440

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