Properties

Label 2-21-1.1-c29-0-24
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  + 3.52e4·2-s − 4.78e6·3-s + 7.03e8·4-s − 9.52e9·5-s − 1.68e11·6-s − 6.78e11·7-s + 5.86e12·8-s + 2.28e13·9-s − 3.35e14·10-s + 1.40e15·11-s − 3.36e15·12-s + 9.14e15·13-s − 2.38e16·14-s + 4.55e16·15-s − 1.71e17·16-s + 5.42e17·17-s + 8.05e17·18-s + 3.51e17·19-s − 6.70e18·20-s + 3.24e18·21-s + 4.95e19·22-s + 5.57e19·23-s − 2.80e19·24-s − 9.54e19·25-s + 3.22e20·26-s − 1.09e20·27-s − 4.77e20·28-s + ⋯
L(s)  = 1  + 1.51·2-s − 0.577·3-s + 1.31·4-s − 0.698·5-s − 0.877·6-s − 0.377·7-s + 0.471·8-s + 0.333·9-s − 1.06·10-s + 1.11·11-s − 0.756·12-s + 0.644·13-s − 0.574·14-s + 0.403·15-s − 0.593·16-s + 0.781·17-s + 0.506·18-s + 0.100·19-s − 0.914·20-s + 0.218·21-s + 1.69·22-s + 1.00·23-s − 0.272·24-s − 0.512·25-s + 0.979·26-s − 0.192·27-s − 0.495·28-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 \( 1 - 3.52e4T + 5.36e8T^{2} \)
5 \( 1 + 9.52e9T + 1.86e20T^{2} \)
11 \( 1 - 1.40e15T + 1.58e30T^{2} \)
13 \( 1 - 9.14e15T + 2.01e32T^{2} \)
17 \( 1 - 5.42e17T + 4.81e35T^{2} \)
19 \( 1 - 3.51e17T + 1.21e37T^{2} \)
23 \( 1 - 5.57e19T + 3.09e39T^{2} \)
29 \( 1 + 7.67e20T + 2.56e42T^{2} \)
31 \( 1 + 6.48e21T + 1.77e43T^{2} \)
37 \( 1 + 1.03e23T + 3.00e45T^{2} \)
41 \( 1 - 2.60e23T + 5.89e46T^{2} \)
43 \( 1 + 7.85e23T + 2.34e47T^{2} \)
47 \( 1 - 1.77e24T + 3.09e48T^{2} \)
53 \( 1 + 8.34e24T + 1.00e50T^{2} \)
59 \( 1 + 3.56e25T + 2.26e51T^{2} \)
61 \( 1 + 1.05e26T + 5.95e51T^{2} \)
67 \( 1 + 7.05e25T + 9.04e52T^{2} \)
71 \( 1 - 2.69e26T + 4.85e53T^{2} \)
73 \( 1 - 5.56e26T + 1.08e54T^{2} \)
79 \( 1 + 7.90e26T + 1.07e55T^{2} \)
83 \( 1 + 1.26e27T + 4.50e55T^{2} \)
89 \( 1 + 2.81e27T + 3.40e56T^{2} \)
97 \( 1 - 4.86e28T + 4.13e57T^{2} \)
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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

−11.87510839524283972557101005324, −10.94930859082677716238938588550, −9.133768228172422239258880109063, −7.26410695301164287044840348805, −6.22323233604688638613074570325, −5.20074959458881697814387369708, −3.93367138312897892221419372135, −3.34153021988595031205995732488, −1.50584942277206848960041647493, 0, 1.50584942277206848960041647493, 3.34153021988595031205995732488, 3.93367138312897892221419372135, 5.20074959458881697814387369708, 6.22323233604688638613074570325, 7.26410695301164287044840348805, 9.133768228172422239258880109063, 10.94930859082677716238938588550, 11.87510839524283972557101005324

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