Properties

Label 2-21-1.1-c29-0-23
Degree $2$
Conductor $21$
Sign $-1$
Analytic cond. $111.883$
Root an. cond. $10.5775$
Motivic weight $29$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 2.07e4·2-s + 4.78e6·3-s − 1.08e8·4-s + 1.18e10·5-s − 9.90e10·6-s + 6.78e11·7-s + 1.33e13·8-s + 2.28e13·9-s − 2.45e14·10-s + 5.61e14·11-s − 5.17e14·12-s − 5.01e15·13-s − 1.40e16·14-s + 5.67e16·15-s − 2.18e17·16-s − 6.41e17·17-s − 4.73e17·18-s + 4.30e17·19-s − 1.28e18·20-s + 3.24e18·21-s − 1.16e19·22-s + 9.94e18·23-s + 6.38e19·24-s − 4.55e19·25-s + 1.03e20·26-s + 1.09e20·27-s − 7.33e19·28-s + ⋯
L(s)  = 1  − 0.893·2-s + 0.577·3-s − 0.201·4-s + 0.869·5-s − 0.515·6-s + 0.377·7-s + 1.07·8-s + 0.333·9-s − 0.776·10-s + 0.446·11-s − 0.116·12-s − 0.353·13-s − 0.337·14-s + 0.501·15-s − 0.758·16-s − 0.924·17-s − 0.297·18-s + 0.123·19-s − 0.175·20-s + 0.218·21-s − 0.398·22-s + 0.178·23-s + 0.619·24-s − 0.244·25-s + 0.315·26-s + 0.192·27-s − 0.0761·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \Lambda(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & -\, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $-1$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(1\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ -1)\)

Particular Values

\(L(15)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{31}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 - 4.78e6T \)
7 \( 1 - 6.78e11T \)
good2 \( 1 + 2.07e4T + 5.36e8T^{2} \)
5 \( 1 - 1.18e10T + 1.86e20T^{2} \)
11 \( 1 - 5.61e14T + 1.58e30T^{2} \)
13 \( 1 + 5.01e15T + 2.01e32T^{2} \)
17 \( 1 + 6.41e17T + 4.81e35T^{2} \)
19 \( 1 - 4.30e17T + 1.21e37T^{2} \)
23 \( 1 - 9.94e18T + 3.09e39T^{2} \)
29 \( 1 + 2.76e21T + 2.56e42T^{2} \)
31 \( 1 + 1.03e21T + 1.77e43T^{2} \)
37 \( 1 - 1.16e22T + 3.00e45T^{2} \)
41 \( 1 + 1.68e23T + 5.89e46T^{2} \)
43 \( 1 + 6.59e22T + 2.34e47T^{2} \)
47 \( 1 + 2.45e24T + 3.09e48T^{2} \)
53 \( 1 - 3.48e24T + 1.00e50T^{2} \)
59 \( 1 - 7.73e25T + 2.26e51T^{2} \)
61 \( 1 + 3.73e25T + 5.95e51T^{2} \)
67 \( 1 - 2.24e26T + 9.04e52T^{2} \)
71 \( 1 - 4.49e26T + 4.85e53T^{2} \)
73 \( 1 - 3.72e26T + 1.08e54T^{2} \)
79 \( 1 - 2.90e27T + 1.07e55T^{2} \)
83 \( 1 + 2.68e27T + 4.50e55T^{2} \)
89 \( 1 + 3.21e28T + 3.40e56T^{2} \)
97 \( 1 + 5.82e28T + 4.13e57T^{2} \)
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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

−11.18559138338481704902239646366, −9.869921768487045230652884255174, −9.190849605390401425853887479689, −8.146319890188359423212410082683, −6.90847511599089729557878145678, −5.25186504773814644117156403971, −3.94679478968185126646033970453, −2.20109171416240796008965709981, −1.41730852320042278439303853070, 0, 1.41730852320042278439303853070, 2.20109171416240796008965709981, 3.94679478968185126646033970453, 5.25186504773814644117156403971, 6.90847511599089729557878145678, 8.146319890188359423212410082683, 9.190849605390401425853887479689, 9.869921768487045230652884255174, 11.18559138338481704902239646366

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