Properties

Label 2-31-1.1-c1-0-1
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  + 1.61·2-s − 3.23·3-s + 0.618·4-s + 5-s − 5.23·6-s + 0.236·7-s − 2.23·8-s + 7.47·9-s + 1.61·10-s + 2·11-s − 2.00·12-s − 3.23·13-s + 0.381·14-s − 3.23·15-s − 4.85·16-s + 0.763·17-s + 12.0·18-s − 2.23·19-s + 0.618·20-s − 0.763·21-s + 3.23·22-s + 5.70·23-s + 7.23·24-s − 4·25-s − 5.23·26-s − 14.4·27-s + 0.145·28-s + ⋯
L(s)  = 1  + 1.14·2-s − 1.86·3-s + 0.309·4-s + 0.447·5-s − 2.13·6-s + 0.0892·7-s − 0.790·8-s + 2.49·9-s + 0.511·10-s + 0.603·11-s − 0.577·12-s − 0.897·13-s + 0.102·14-s − 0.835·15-s − 1.21·16-s + 0.185·17-s + 2.84·18-s − 0.512·19-s + 0.138·20-s − 0.166·21-s + 0.689·22-s + 1.19·23-s + 1.47·24-s − 0.800·25-s − 1.02·26-s − 2.78·27-s + 0.0275·28-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

\(L(1)\) \(\approx\) \(0.7461698958\)
\(L(\frac12)\) \(\approx\) \(0.7461698958\)
\(L(\frac{3}{2})\) 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 \( 1 - 1.61T + 2T^{2} \)
3 \( 1 + 3.23T + 3T^{2} \)
5 \( 1 - T + 5T^{2} \)
7 \( 1 - 0.236T + 7T^{2} \)
11 \( 1 - 2T + 11T^{2} \)
13 \( 1 + 3.23T + 13T^{2} \)
17 \( 1 - 0.763T + 17T^{2} \)
19 \( 1 + 2.23T + 19T^{2} \)
23 \( 1 - 5.70T + 23T^{2} \)
29 \( 1 - 2.76T + 29T^{2} \)
37 \( 1 + 2T + 37T^{2} \)
41 \( 1 - 7T + 41T^{2} \)
43 \( 1 - 1.23T + 43T^{2} \)
47 \( 1 - 2.47T + 47T^{2} \)
53 \( 1 + 10.4T + 53T^{2} \)
59 \( 1 - 2.23T + 59T^{2} \)
61 \( 1 - 8.18T + 61T^{2} \)
67 \( 1 - 8T + 67T^{2} \)
71 \( 1 + 9.18T + 71T^{2} \)
73 \( 1 - 8.47T + 73T^{2} \)
79 \( 1 + 11.7T + 79T^{2} \)
83 \( 1 + 14.9T + 83T^{2} \)
89 \( 1 - 11.7T + 89T^{2} \)
97 \( 1 + 15.9T + 97T^{2} \)
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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

−17.15432508999057702779671121261, −15.79402375241501110804903952077, −14.48246076460290596164391958315, −13.01060856769596994934602495263, −12.19411267640808601410552212031, −11.18435457248788706232861087885, −9.694681048392266970713798808449, −6.75174651250368878590349717473, −5.63181617197644712048767615573, −4.52821779104957415480228032986, 4.52821779104957415480228032986, 5.63181617197644712048767615573, 6.75174651250368878590349717473, 9.694681048392266970713798808449, 11.18435457248788706232861087885, 12.19411267640808601410552212031, 13.01060856769596994934602495263, 14.48246076460290596164391958315, 15.79402375241501110804903952077, 17.15432508999057702779671121261

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