Properties

Label 2-997-1.1-c1-0-32
Degree $2$
Conductor $997$
Sign $-1$
Analytic cond. $7.96108$
Root an. cond. $2.82153$
Motivic weight $1$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 0.807·2-s − 1.50·3-s − 1.34·4-s + 0.199·5-s + 1.21·6-s − 1.00·7-s + 2.70·8-s − 0.721·9-s − 0.161·10-s + 3.66·11-s + 2.03·12-s − 1.86·13-s + 0.813·14-s − 0.301·15-s + 0.513·16-s − 1.18·17-s + 0.582·18-s + 5.40·19-s − 0.269·20-s + 1.52·21-s − 2.95·22-s − 0.413·23-s − 4.08·24-s − 4.96·25-s + 1.50·26-s + 5.61·27-s + 1.35·28-s + ⋯
L(s)  = 1  − 0.570·2-s − 0.871·3-s − 0.673·4-s + 0.0894·5-s + 0.497·6-s − 0.380·7-s + 0.955·8-s − 0.240·9-s − 0.0510·10-s + 1.10·11-s + 0.587·12-s − 0.517·13-s + 0.217·14-s − 0.0779·15-s + 0.128·16-s − 0.287·17-s + 0.137·18-s + 1.24·19-s − 0.0602·20-s + 0.331·21-s − 0.630·22-s − 0.0862·23-s − 0.832·24-s − 0.992·25-s + 0.295·26-s + 1.08·27-s + 0.256·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 997 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 997 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(997\)
Sign: $-1$
Analytic conductor: \(7.96108\)
Root analytic conductor: \(2.82153\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 997,\ (\ :1/2),\ -1)\)

Particular Values

\(L(1)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad997 \( 1 + T \)
good2 \( 1 + 0.807T + 2T^{2} \)
3 \( 1 + 1.50T + 3T^{2} \)
5 \( 1 - 0.199T + 5T^{2} \)
7 \( 1 + 1.00T + 7T^{2} \)
11 \( 1 - 3.66T + 11T^{2} \)
13 \( 1 + 1.86T + 13T^{2} \)
17 \( 1 + 1.18T + 17T^{2} \)
19 \( 1 - 5.40T + 19T^{2} \)
23 \( 1 + 0.413T + 23T^{2} \)
29 \( 1 - 10.2T + 29T^{2} \)
31 \( 1 + 7.24T + 31T^{2} \)
37 \( 1 - 6.92T + 37T^{2} \)
41 \( 1 + 1.05T + 41T^{2} \)
43 \( 1 + 10.9T + 43T^{2} \)
47 \( 1 + 5.46T + 47T^{2} \)
53 \( 1 + 9.08T + 53T^{2} \)
59 \( 1 - 5.64T + 59T^{2} \)
61 \( 1 + 0.365T + 61T^{2} \)
67 \( 1 + 2.04T + 67T^{2} \)
71 \( 1 + 7.85T + 71T^{2} \)
73 \( 1 + 4.34T + 73T^{2} \)
79 \( 1 + 15.7T + 79T^{2} \)
83 \( 1 + 1.41T + 83T^{2} \)
89 \( 1 - 5.10T + 89T^{2} \)
97 \( 1 + 9.16T + 97T^{2} \)
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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

−9.694708802269304545256853779008, −8.861805008317777429050682665085, −8.020807130300907546238535396978, −6.98124491615477868324791350073, −6.15839182531389837259967784738, −5.21774063760257288746394118741, −4.40647200777163681271172326471, −3.19917204795585995626605982689, −1.36820250937996606429823204646, 0, 1.36820250937996606429823204646, 3.19917204795585995626605982689, 4.40647200777163681271172326471, 5.21774063760257288746394118741, 6.15839182531389837259967784738, 6.98124491615477868324791350073, 8.020807130300907546238535396978, 8.861805008317777429050682665085, 9.694708802269304545256853779008

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