Properties

Label 2-21-1.1-c29-0-27
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  + 3.76e4·2-s − 4.78e6·3-s + 8.79e8·4-s + 1.83e10·5-s − 1.79e11·6-s − 6.78e11·7-s + 1.28e13·8-s + 2.28e13·9-s + 6.92e14·10-s − 7.53e14·11-s − 4.20e15·12-s − 1.44e16·13-s − 2.55e16·14-s − 8.79e16·15-s + 1.29e16·16-s − 8.99e17·17-s + 8.60e17·18-s + 1.24e18·19-s + 1.61e19·20-s + 3.24e18·21-s − 2.83e19·22-s − 3.80e19·23-s − 6.16e19·24-s + 1.52e20·25-s − 5.42e20·26-s − 1.09e20·27-s − 5.96e20·28-s + ⋯
L(s)  = 1  + 1.62·2-s − 0.577·3-s + 1.63·4-s + 1.34·5-s − 0.937·6-s − 0.377·7-s + 1.03·8-s + 0.333·9-s + 2.18·10-s − 0.598·11-s − 0.945·12-s − 1.01·13-s − 0.613·14-s − 0.778·15-s + 0.0448·16-s − 1.29·17-s + 0.541·18-s + 0.358·19-s + 2.20·20-s + 0.218·21-s − 0.972·22-s − 0.684·23-s − 0.598·24-s + 0.817·25-s − 1.65·26-s − 0.192·27-s − 0.619·28-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 \( 1 - 3.76e4T + 5.36e8T^{2} \)
5 \( 1 - 1.83e10T + 1.86e20T^{2} \)
11 \( 1 + 7.53e14T + 1.58e30T^{2} \)
13 \( 1 + 1.44e16T + 2.01e32T^{2} \)
17 \( 1 + 8.99e17T + 4.81e35T^{2} \)
19 \( 1 - 1.24e18T + 1.21e37T^{2} \)
23 \( 1 + 3.80e19T + 3.09e39T^{2} \)
29 \( 1 + 1.55e21T + 2.56e42T^{2} \)
31 \( 1 + 1.79e20T + 1.77e43T^{2} \)
37 \( 1 - 4.46e22T + 3.00e45T^{2} \)
41 \( 1 + 3.43e23T + 5.89e46T^{2} \)
43 \( 1 - 5.56e23T + 2.34e47T^{2} \)
47 \( 1 - 1.17e24T + 3.09e48T^{2} \)
53 \( 1 - 4.55e24T + 1.00e50T^{2} \)
59 \( 1 - 1.57e25T + 2.26e51T^{2} \)
61 \( 1 + 2.37e25T + 5.95e51T^{2} \)
67 \( 1 + 2.63e26T + 9.04e52T^{2} \)
71 \( 1 + 1.36e27T + 4.85e53T^{2} \)
73 \( 1 - 3.24e26T + 1.08e54T^{2} \)
79 \( 1 - 4.00e27T + 1.07e55T^{2} \)
83 \( 1 + 1.21e28T + 4.50e55T^{2} \)
89 \( 1 + 4.32e27T + 3.40e56T^{2} \)
97 \( 1 - 1.14e29T + 4.13e57T^{2} \)
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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

−11.93958163456348483435584072516, −10.61231678572576060406139785787, −9.431536129488326435597647103554, −7.10773795735439888536200634254, −6.04271123042262943166090772259, −5.35163604829453411211115689754, −4.30295820892292374045429548412, −2.72158499688290941430556499242, −1.92450534125781899366554624131, 0, 1.92450534125781899366554624131, 2.72158499688290941430556499242, 4.30295820892292374045429548412, 5.35163604829453411211115689754, 6.04271123042262943166090772259, 7.10773795735439888536200634254, 9.431536129488326435597647103554, 10.61231678572576060406139785787, 11.93958163456348483435584072516

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