Properties

Label 2-21-1.1-c29-0-20
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  − 3.96e4·2-s − 4.78e6·3-s + 1.03e9·4-s + 8.07e9·5-s + 1.89e11·6-s − 6.78e11·7-s − 1.96e13·8-s + 2.28e13·9-s − 3.19e14·10-s + 1.86e15·11-s − 4.94e15·12-s + 1.25e16·13-s + 2.68e16·14-s − 3.86e16·15-s + 2.24e17·16-s + 7.42e17·17-s − 9.06e17·18-s − 2.34e18·19-s + 8.34e18·20-s + 3.24e18·21-s − 7.39e19·22-s − 7.79e19·23-s + 9.39e19·24-s − 1.21e20·25-s − 4.96e20·26-s − 1.09e20·27-s − 7.00e20·28-s + ⋯
L(s)  = 1  − 1.70·2-s − 0.577·3-s + 1.92·4-s + 0.591·5-s + 0.987·6-s − 0.377·7-s − 1.57·8-s + 0.333·9-s − 1.01·10-s + 1.48·11-s − 1.11·12-s + 0.882·13-s + 0.646·14-s − 0.341·15-s + 0.777·16-s + 1.06·17-s − 0.569·18-s − 0.672·19-s + 1.13·20-s + 0.218·21-s − 2.53·22-s − 1.40·23-s + 0.911·24-s − 0.649·25-s − 1.50·26-s − 0.192·27-s − 0.727·28-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 \( 1 + 3.96e4T + 5.36e8T^{2} \)
5 \( 1 - 8.07e9T + 1.86e20T^{2} \)
11 \( 1 - 1.86e15T + 1.58e30T^{2} \)
13 \( 1 - 1.25e16T + 2.01e32T^{2} \)
17 \( 1 - 7.42e17T + 4.81e35T^{2} \)
19 \( 1 + 2.34e18T + 1.21e37T^{2} \)
23 \( 1 + 7.79e19T + 3.09e39T^{2} \)
29 \( 1 + 1.13e21T + 2.56e42T^{2} \)
31 \( 1 - 6.91e20T + 1.77e43T^{2} \)
37 \( 1 + 2.02e22T + 3.00e45T^{2} \)
41 \( 1 + 3.30e23T + 5.89e46T^{2} \)
43 \( 1 - 5.53e23T + 2.34e47T^{2} \)
47 \( 1 - 7.39e22T + 3.09e48T^{2} \)
53 \( 1 + 1.54e25T + 1.00e50T^{2} \)
59 \( 1 + 2.59e23T + 2.26e51T^{2} \)
61 \( 1 + 5.70e25T + 5.95e51T^{2} \)
67 \( 1 - 2.18e26T + 9.04e52T^{2} \)
71 \( 1 - 1.16e27T + 4.85e53T^{2} \)
73 \( 1 - 1.47e27T + 1.08e54T^{2} \)
79 \( 1 + 6.71e25T + 1.07e55T^{2} \)
83 \( 1 + 1.06e28T + 4.50e55T^{2} \)
89 \( 1 + 3.22e27T + 3.40e56T^{2} \)
97 \( 1 - 5.14e28T + 4.13e57T^{2} \)
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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

−11.17101151995226875995239057420, −10.02966196312702512491738983988, −9.302184370602119828428809537074, −8.073679648651416534539727564971, −6.65941997076533941192537064597, −5.93701389395633916271770612338, −3.76997659404660831412040385527, −1.90791469439755908267545116772, −1.16503569798432556351941192335, 0, 1.16503569798432556351941192335, 1.90791469439755908267545116772, 3.76997659404660831412040385527, 5.93701389395633916271770612338, 6.65941997076533941192537064597, 8.073679648651416534539727564971, 9.302184370602119828428809537074, 10.02966196312702512491738983988, 11.17101151995226875995239057420

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