Properties

Label 2-21-1.1-c29-0-4
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 $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 4.16e4·2-s − 4.78e6·3-s + 1.19e9·4-s + 9.35e9·5-s + 1.99e11·6-s + 6.78e11·7-s − 2.74e13·8-s + 2.28e13·9-s − 3.89e14·10-s − 5.18e14·11-s − 5.72e15·12-s − 9.78e15·13-s − 2.82e16·14-s − 4.47e16·15-s + 5.01e17·16-s − 9.17e17·17-s − 9.52e17·18-s − 5.21e17·19-s + 1.11e19·20-s − 3.24e18·21-s + 2.15e19·22-s + 1.03e20·23-s + 1.31e20·24-s − 9.87e19·25-s + 4.07e20·26-s − 1.09e20·27-s + 8.11e20·28-s + ⋯
L(s)  = 1  − 1.79·2-s − 0.577·3-s + 2.22·4-s + 0.685·5-s + 1.03·6-s + 0.377·7-s − 2.20·8-s + 0.333·9-s − 1.23·10-s − 0.411·11-s − 1.28·12-s − 0.689·13-s − 0.679·14-s − 0.395·15-s + 1.73·16-s − 1.32·17-s − 0.598·18-s − 0.149·19-s + 1.52·20-s − 0.218·21-s + 0.740·22-s + 1.85·23-s + 1.27·24-s − 0.530·25-s + 1.23·26-s − 0.192·27-s + 0.842·28-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: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ 1)\)

Particular Values

\(L(15)\) \(\approx\) \(0.6007969968\)
\(L(\frac12)\) \(\approx\) \(0.6007969968\)
\(L(\frac{31}{2})\) 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 \( 1 + 4.16e4T + 5.36e8T^{2} \)
5 \( 1 - 9.35e9T + 1.86e20T^{2} \)
11 \( 1 + 5.18e14T + 1.58e30T^{2} \)
13 \( 1 + 9.78e15T + 2.01e32T^{2} \)
17 \( 1 + 9.17e17T + 4.81e35T^{2} \)
19 \( 1 + 5.21e17T + 1.21e37T^{2} \)
23 \( 1 - 1.03e20T + 3.09e39T^{2} \)
29 \( 1 - 1.65e21T + 2.56e42T^{2} \)
31 \( 1 + 4.31e21T + 1.77e43T^{2} \)
37 \( 1 - 5.32e22T + 3.00e45T^{2} \)
41 \( 1 + 8.95e22T + 5.89e46T^{2} \)
43 \( 1 + 3.51e23T + 2.34e47T^{2} \)
47 \( 1 + 9.32e22T + 3.09e48T^{2} \)
53 \( 1 + 1.50e25T + 1.00e50T^{2} \)
59 \( 1 - 6.90e25T + 2.26e51T^{2} \)
61 \( 1 - 4.68e25T + 5.95e51T^{2} \)
67 \( 1 + 9.86e25T + 9.04e52T^{2} \)
71 \( 1 + 7.36e26T + 4.85e53T^{2} \)
73 \( 1 - 1.98e26T + 1.08e54T^{2} \)
79 \( 1 + 9.75e26T + 1.07e55T^{2} \)
83 \( 1 + 1.15e27T + 4.50e55T^{2} \)
89 \( 1 - 2.78e28T + 3.40e56T^{2} \)
97 \( 1 - 3.03e28T + 4.13e57T^{2} \)
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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

−11.51575047999271400426558842904, −10.68376652166833406837623617135, −9.680422810283334290463950251136, −8.678663507951299514664553156871, −7.36353739658666882745336391271, −6.40459114216201165872637196671, −4.95224229320079142226896984523, −2.57797784343392557444159049568, −1.63567414241960552305670038608, −0.49803418075559936191300793391, 0.49803418075559936191300793391, 1.63567414241960552305670038608, 2.57797784343392557444159049568, 4.95224229320079142226896984523, 6.40459114216201165872637196671, 7.36353739658666882745336391271, 8.678663507951299514664553156871, 9.680422810283334290463950251136, 10.68376652166833406837623617135, 11.51575047999271400426558842904

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