Properties

Label 2-21-1.1-c17-0-9
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 $1$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 649.·2-s − 6.56e3·3-s + 2.91e5·4-s + 5.08e5·5-s + 4.26e6·6-s − 5.76e6·7-s − 1.04e8·8-s + 4.30e7·9-s − 3.30e8·10-s − 9.87e8·11-s − 1.91e9·12-s + 1.13e9·13-s + 3.74e9·14-s − 3.33e9·15-s + 2.95e10·16-s + 3.74e9·17-s − 2.79e10·18-s + 7.42e10·19-s + 1.48e11·20-s + 3.78e10·21-s + 6.41e11·22-s + 2.51e11·23-s + 6.83e11·24-s − 5.04e11·25-s − 7.40e11·26-s − 2.82e11·27-s − 1.67e12·28-s + ⋯
L(s)  = 1  − 1.79·2-s − 0.577·3-s + 2.22·4-s + 0.581·5-s + 1.03·6-s − 0.377·7-s − 2.19·8-s + 0.333·9-s − 1.04·10-s − 1.38·11-s − 1.28·12-s + 0.387·13-s + 0.678·14-s − 0.335·15-s + 1.71·16-s + 0.130·17-s − 0.598·18-s + 1.00·19-s + 1.29·20-s + 0.218·21-s + 2.49·22-s + 0.669·23-s + 1.26·24-s − 0.661·25-s − 0.695·26-s − 0.192·27-s − 0.840·28-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: \(1\)
Selberg data: \((2,\ 21,\ (\ :17/2),\ -1)\)

Particular Values

\(L(9)\) \(=\) \(0\)
\(L(\frac12)\) \(=\) \(0\)
\(L(\frac{19}{2})\) 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 \( 1 + 649.T + 1.31e5T^{2} \)
5 \( 1 - 5.08e5T + 7.62e11T^{2} \)
11 \( 1 + 9.87e8T + 5.05e17T^{2} \)
13 \( 1 - 1.13e9T + 8.65e18T^{2} \)
17 \( 1 - 3.74e9T + 8.27e20T^{2} \)
19 \( 1 - 7.42e10T + 5.48e21T^{2} \)
23 \( 1 - 2.51e11T + 1.41e23T^{2} \)
29 \( 1 - 5.43e11T + 7.25e24T^{2} \)
31 \( 1 - 4.88e12T + 2.25e25T^{2} \)
37 \( 1 - 6.69e12T + 4.56e26T^{2} \)
41 \( 1 + 9.55e13T + 2.61e27T^{2} \)
43 \( 1 - 1.18e14T + 5.87e27T^{2} \)
47 \( 1 + 2.80e14T + 2.66e28T^{2} \)
53 \( 1 - 7.83e14T + 2.05e29T^{2} \)
59 \( 1 + 1.50e14T + 1.27e30T^{2} \)
61 \( 1 - 2.12e15T + 2.24e30T^{2} \)
67 \( 1 - 1.86e15T + 1.10e31T^{2} \)
71 \( 1 + 7.74e15T + 2.96e31T^{2} \)
73 \( 1 - 1.75e15T + 4.74e31T^{2} \)
79 \( 1 + 1.79e16T + 1.81e32T^{2} \)
83 \( 1 + 2.17e16T + 4.21e32T^{2} \)
89 \( 1 + 9.77e15T + 1.37e33T^{2} \)
97 \( 1 + 7.76e16T + 5.95e33T^{2} \)
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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

−13.30614740818663621028427778676, −11.65557500677723759476307192999, −10.42641771881263027874147244944, −9.692143425138789535744797493617, −8.218035956531980095727388905303, −6.94160379091003956903370026138, −5.56673738989229546085716359193, −2.68337861231909245995073417418, −1.21158503784375269817710950920, 0, 1.21158503784375269817710950920, 2.68337861231909245995073417418, 5.56673738989229546085716359193, 6.94160379091003956903370026138, 8.218035956531980095727388905303, 9.692143425138789535744797493617, 10.42641771881263027874147244944, 11.65557500677723759476307192999, 13.30614740818663621028427778676

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