Properties

Label 2-31-1.1-c1-0-0
Degree $2$
Conductor $31$
Sign $1$
Analytic cond. $0.247536$
Root an. cond. $0.497530$
Motivic weight $1$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 0.618·2-s + 1.23·3-s − 1.61·4-s + 5-s − 0.763·6-s − 4.23·7-s + 2.23·8-s − 1.47·9-s − 0.618·10-s + 2·11-s − 2.00·12-s + 1.23·13-s + 2.61·14-s + 1.23·15-s + 1.85·16-s + 5.23·17-s + 0.909·18-s + 2.23·19-s − 1.61·20-s − 5.23·21-s − 1.23·22-s − 7.70·23-s + 2.76·24-s − 4·25-s − 0.763·26-s − 5.52·27-s + 6.85·28-s + ⋯
L(s)  = 1  − 0.437·2-s + 0.713·3-s − 0.809·4-s + 0.447·5-s − 0.311·6-s − 1.60·7-s + 0.790·8-s − 0.490·9-s − 0.195·10-s + 0.603·11-s − 0.577·12-s + 0.342·13-s + 0.699·14-s + 0.319·15-s + 0.463·16-s + 1.26·17-s + 0.214·18-s + 0.512·19-s − 0.361·20-s − 1.14·21-s − 0.263·22-s − 1.60·23-s + 0.564·24-s − 0.800·25-s − 0.149·26-s − 1.06·27-s + 1.29·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 31 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 31 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(31\)
Sign: $1$
Analytic conductor: \(0.247536\)
Root analytic conductor: \(0.497530\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 31,\ (\ :1/2),\ 1)\)

Particular Values

\(L(1)\) \(\approx\) \(0.6021252350\)
\(L(\frac12)\) \(\approx\) \(0.6021252350\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad31 \( 1 - T \)
good2 \( 1 + 0.618T + 2T^{2} \)
3 \( 1 - 1.23T + 3T^{2} \)
5 \( 1 - T + 5T^{2} \)
7 \( 1 + 4.23T + 7T^{2} \)
11 \( 1 - 2T + 11T^{2} \)
13 \( 1 - 1.23T + 13T^{2} \)
17 \( 1 - 5.23T + 17T^{2} \)
19 \( 1 - 2.23T + 19T^{2} \)
23 \( 1 + 7.70T + 23T^{2} \)
29 \( 1 - 7.23T + 29T^{2} \)
37 \( 1 + 2T + 37T^{2} \)
41 \( 1 - 7T + 41T^{2} \)
43 \( 1 + 3.23T + 43T^{2} \)
47 \( 1 + 6.47T + 47T^{2} \)
53 \( 1 + 1.52T + 53T^{2} \)
59 \( 1 + 2.23T + 59T^{2} \)
61 \( 1 + 14.1T + 61T^{2} \)
67 \( 1 - 8T + 67T^{2} \)
71 \( 1 - 13.1T + 71T^{2} \)
73 \( 1 + 0.472T + 73T^{2} \)
79 \( 1 - 1.70T + 79T^{2} \)
83 \( 1 - 2.94T + 83T^{2} \)
89 \( 1 + 1.70T + 89T^{2} \)
97 \( 1 - 1.94T + 97T^{2} \)
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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

−17.03606772532803878991628196034, −15.99097596480158213236404952174, −14.20506575973747679651369846082, −13.64320749624703022846928675733, −12.27803936712599513177270754436, −9.988884574157259088769712815632, −9.392764051520264102402757332269, −8.066873544053878311165268740079, −6.03278399652487520131783270143, −3.50551568171874308730107016287, 3.50551568171874308730107016287, 6.03278399652487520131783270143, 8.066873544053878311165268740079, 9.392764051520264102402757332269, 9.988884574157259088769712815632, 12.27803936712599513177270754436, 13.64320749624703022846928675733, 14.20506575973747679651369846082, 15.99097596480158213236404952174, 17.03606772532803878991628196034

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