Properties

Label 2-7-7.6-c8-0-1
Degree $2$
Conductor $7$
Sign $1$
Analytic cond. $2.85165$
Root an. cond. $1.68868$
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  − 31·2-s + 705·4-s + 2.40e3·7-s − 1.39e4·8-s + 6.56e3·9-s + 1.31e4·11-s − 7.44e4·14-s + 2.51e5·16-s − 2.03e5·18-s − 4.07e5·22-s − 2.09e4·23-s + 3.90e5·25-s + 1.69e6·28-s + 1.08e5·29-s − 4.21e6·32-s + 4.62e6·36-s − 2.07e6·37-s − 6.72e6·43-s + 9.27e6·44-s + 6.48e5·46-s + 5.76e6·49-s − 1.21e7·50-s + 1.53e7·53-s − 3.34e7·56-s − 3.35e6·58-s + 1.57e7·63-s + 6.65e7·64-s + ⋯
L(s)  = 1  − 1.93·2-s + 2.75·4-s + 7-s − 3.39·8-s + 9-s + 0.898·11-s − 1.93·14-s + 3.83·16-s − 1.93·18-s − 1.74·22-s − 0.0747·23-s + 25-s + 2.75·28-s + 0.152·29-s − 4.02·32-s + 2.75·36-s − 1.10·37-s − 1.96·43-s + 2.47·44-s + 0.144·46-s + 49-s − 1.93·50-s + 1.94·53-s − 3.39·56-s − 0.296·58-s + 63-s + 3.96·64-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 7 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(9-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 7 ^{s/2} \, \Gamma_{\C}(s+4) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(7\)
Sign: $1$
Analytic conductor: \(2.85165\)
Root analytic conductor: \(1.68868\)
Motivic weight: \(8\)
Rational: yes
Arithmetic: yes
Character: $\chi_{7} (6, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 7,\ (\ :4),\ 1)\)

Particular Values

\(L(\frac{9}{2})\) \(\approx\) \(0.7050764436\)
\(L(\frac12)\) \(\approx\) \(0.7050764436\)
\(L(5)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad7 \( 1 - p^{4} T \)
good2 \( 1 + 31 T + p^{8} T^{2} \)
3 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
5 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
11 \( 1 - 13154 T + p^{8} T^{2} \)
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 \( 1 + 20926 T + p^{8} T^{2} \)
29 \( 1 - 108194 T + p^{8} T^{2} \)
31 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
37 \( 1 + 2073886 T + p^{8} T^{2} \)
41 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
43 \( 1 + 6726046 T + p^{8} T^{2} \)
47 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
53 \( 1 - 15377762 T + p^{8} T^{2} \)
59 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
61 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
67 \( 1 + 15839326 T + p^{8} T^{2} \)
71 \( 1 + 42331966 T + p^{8} T^{2} \)
73 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
79 \( 1 + 64606846 T + p^{8} T^{2} \)
83 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
89 \( ( 1 - p^{4} T )( 1 + p^{4} T ) \)
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

−20.19919249791923172639004889380, −18.83057030527403870855414681003, −17.78984690345478177936540549681, −16.56263945714005997042348548484, −15.04192493919052488382018448312, −11.80658495895418354406187242632, −10.31503820493995659736389591099, −8.692640034198523192534860102525, −7.06661744652306668936091890853, −1.43975694701657115285982645837, 1.43975694701657115285982645837, 7.06661744652306668936091890853, 8.692640034198523192534860102525, 10.31503820493995659736389591099, 11.80658495895418354406187242632, 15.04192493919052488382018448312, 16.56263945714005997042348548484, 17.78984690345478177936540549681, 18.83057030527403870855414681003, 20.19919249791923172639004889380

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