Properties

Label 2-7-1.1-c7-0-2
Degree $2$
Conductor $7$
Sign $-1$
Analytic cond. $2.18669$
Root an. cond. $1.47874$
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  − 6·2-s − 42·3-s − 92·4-s − 84·5-s + 252·6-s + 343·7-s + 1.32e3·8-s − 423·9-s + 504·10-s − 5.56e3·11-s + 3.86e3·12-s − 5.15e3·13-s − 2.05e3·14-s + 3.52e3·15-s + 3.85e3·16-s − 1.39e4·17-s + 2.53e3·18-s + 5.53e4·19-s + 7.72e3·20-s − 1.44e4·21-s + 3.34e4·22-s − 9.12e4·23-s − 5.54e4·24-s − 7.10e4·25-s + 3.09e4·26-s + 1.09e5·27-s − 3.15e4·28-s + ⋯
L(s)  = 1  − 0.530·2-s − 0.898·3-s − 0.718·4-s − 0.300·5-s + 0.476·6-s + 0.377·7-s + 0.911·8-s − 0.193·9-s + 0.159·10-s − 1.26·11-s + 0.645·12-s − 0.650·13-s − 0.200·14-s + 0.269·15-s + 0.235·16-s − 0.690·17-s + 0.102·18-s + 1.85·19-s + 0.216·20-s − 0.339·21-s + 0.668·22-s − 1.56·23-s − 0.818·24-s − 0.909·25-s + 0.344·26-s + 1.07·27-s − 0.271·28-s + ⋯

Functional equation

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

Invariants

Degree: \(2\)
Conductor: \(7\)
Sign: $-1$
Analytic conductor: \(2.18669\)
Root analytic conductor: \(1.47874\)
Motivic weight: \(7\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 7,\ (\ :7/2),\ -1)\)

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)$
bad7 \( 1 - p^{3} T \)
good2 \( 1 + 3 p T + p^{7} T^{2} \)
3 \( 1 + 14 p T + p^{7} T^{2} \)
5 \( 1 + 84 T + p^{7} T^{2} \)
11 \( 1 + 5568 T + p^{7} T^{2} \)
13 \( 1 + 5152 T + p^{7} T^{2} \)
17 \( 1 + 13986 T + p^{7} T^{2} \)
19 \( 1 - 55370 T + p^{7} T^{2} \)
23 \( 1 + 91272 T + p^{7} T^{2} \)
29 \( 1 - 41610 T + p^{7} T^{2} \)
31 \( 1 - 150332 T + p^{7} T^{2} \)
37 \( 1 + 136366 T + p^{7} T^{2} \)
41 \( 1 + 510258 T + p^{7} T^{2} \)
43 \( 1 + 172072 T + p^{7} T^{2} \)
47 \( 1 + 519036 T + p^{7} T^{2} \)
53 \( 1 + 59202 T + p^{7} T^{2} \)
59 \( 1 - 1979250 T + p^{7} T^{2} \)
61 \( 1 + 2988748 T + p^{7} T^{2} \)
67 \( 1 - 2409404 T + p^{7} T^{2} \)
71 \( 1 - 1504512 T + p^{7} T^{2} \)
73 \( 1 + 1821022 T + p^{7} T^{2} \)
79 \( 1 + 1669240 T + p^{7} T^{2} \)
83 \( 1 - 696738 T + p^{7} T^{2} \)
89 \( 1 - 5558490 T + p^{7} T^{2} \)
97 \( 1 - 101822 p T + p^{7} T^{2} \)
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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

−19.99031417231193878713582317681, −18.27422586042344500560304503677, −17.51282086622537592125300609925, −15.96651848563180379064634563474, −13.77648746942372162913815219723, −11.81628169961814651769762678108, −10.11800761391463716378099581502, −7.978126697923222804343204223984, −5.12939766677151346415201112010, 0, 5.12939766677151346415201112010, 7.978126697923222804343204223984, 10.11800761391463716378099581502, 11.81628169961814651769762678108, 13.77648746942372162913815219723, 15.96651848563180379064634563474, 17.51282086622537592125300609925, 18.27422586042344500560304503677, 19.99031417231193878713582317681

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