Properties

Label 2-21-1.1-c17-0-3
Degree $2$
Conductor $21$
Sign $1$
Analytic cond. $38.4766$
Root an. cond. $6.20295$
Motivic weight $17$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 300.·2-s − 6.56e3·3-s − 4.06e4·4-s + 6.85e5·5-s + 1.97e6·6-s + 5.76e6·7-s + 5.16e7·8-s + 4.30e7·9-s − 2.06e8·10-s − 4.88e8·11-s + 2.66e8·12-s + 6.04e8·13-s − 1.73e9·14-s − 4.49e9·15-s − 1.02e10·16-s − 3.25e10·17-s − 1.29e10·18-s + 2.87e10·19-s − 2.78e10·20-s − 3.78e10·21-s + 1.47e11·22-s − 7.82e10·23-s − 3.38e11·24-s − 2.93e11·25-s − 1.81e11·26-s − 2.82e11·27-s − 2.34e11·28-s + ⋯
L(s)  = 1  − 0.830·2-s − 0.577·3-s − 0.310·4-s + 0.784·5-s + 0.479·6-s + 0.377·7-s + 1.08·8-s + 0.333·9-s − 0.651·10-s − 0.687·11-s + 0.178·12-s + 0.205·13-s − 0.313·14-s − 0.452·15-s − 0.593·16-s − 1.13·17-s − 0.276·18-s + 0.389·19-s − 0.243·20-s − 0.218·21-s + 0.571·22-s − 0.208·23-s − 0.628·24-s − 0.384·25-s − 0.170·26-s − 0.192·27-s − 0.117·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(18-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+17/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $1$
Analytic conductor: \(38.4766\)
Root analytic conductor: \(6.20295\)
Motivic weight: \(17\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :17/2),\ 1)\)

Particular Values

\(L(9)\) \(\approx\) \(0.9202505817\)
\(L(\frac12)\) \(\approx\) \(0.9202505817\)
\(L(\frac{19}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + 6.56e3T \)
7 \( 1 - 5.76e6T \)
good2 \( 1 + 300.T + 1.31e5T^{2} \)
5 \( 1 - 6.85e5T + 7.62e11T^{2} \)
11 \( 1 + 4.88e8T + 5.05e17T^{2} \)
13 \( 1 - 6.04e8T + 8.65e18T^{2} \)
17 \( 1 + 3.25e10T + 8.27e20T^{2} \)
19 \( 1 - 2.87e10T + 5.48e21T^{2} \)
23 \( 1 + 7.82e10T + 1.41e23T^{2} \)
29 \( 1 + 5.82e10T + 7.25e24T^{2} \)
31 \( 1 + 9.09e11T + 2.25e25T^{2} \)
37 \( 1 - 1.74e13T + 4.56e26T^{2} \)
41 \( 1 - 6.09e13T + 2.61e27T^{2} \)
43 \( 1 - 1.89e13T + 5.87e27T^{2} \)
47 \( 1 - 2.13e14T + 2.66e28T^{2} \)
53 \( 1 - 3.07e14T + 2.05e29T^{2} \)
59 \( 1 + 4.12e14T + 1.27e30T^{2} \)
61 \( 1 + 1.45e15T + 2.24e30T^{2} \)
67 \( 1 - 2.09e15T + 1.10e31T^{2} \)
71 \( 1 - 7.54e15T + 2.96e31T^{2} \)
73 \( 1 + 8.54e15T + 4.74e31T^{2} \)
79 \( 1 + 1.91e16T + 1.81e32T^{2} \)
83 \( 1 + 1.72e15T + 4.21e32T^{2} \)
89 \( 1 + 3.63e15T + 1.37e33T^{2} \)
97 \( 1 - 1.04e17T + 5.95e33T^{2} \)
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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

−13.96354554888632133217646566353, −12.97186841206232958828087058933, −11.15370152845241633861185089068, −10.11019235750343563760837475355, −8.956747886597569513261000427316, −7.52927483515784197191057259291, −5.80922707269571690125430393211, −4.48061978925140764251784554241, −2.05299326739074307950693326591, −0.67467089150812594543348484160, 0.67467089150812594543348484160, 2.05299326739074307950693326591, 4.48061978925140764251784554241, 5.80922707269571690125430393211, 7.52927483515784197191057259291, 8.956747886597569513261000427316, 10.11019235750343563760837475355, 11.15370152845241633861185089068, 12.97186841206232958828087058933, 13.96354554888632133217646566353

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