Properties

Label 2-21-7.3-c8-0-9
Degree $2$
Conductor $21$
Sign $0.954 - 0.297i$
Analytic cond. $8.55495$
Root an. cond. $2.92488$
Motivic weight $8$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (6.15 + 10.6i)2-s + (40.5 + 23.3i)3-s + (52.1 − 90.3i)4-s + (599. − 346. i)5-s + 575. i·6-s + (−419. − 2.36e3i)7-s + 4.43e3·8-s + (1.09e3 + 1.89e3i)9-s + (7.38e3 + 4.26e3i)10-s + (−3.93e3 + 6.82e3i)11-s + (4.22e3 − 2.43e3i)12-s + 1.73e4i·13-s + (2.26e4 − 1.90e4i)14-s + 3.23e4·15-s + (1.39e4 + 2.42e4i)16-s + (7.12e4 + 4.11e4i)17-s + ⋯
L(s)  = 1  + (0.384 + 0.666i)2-s + (0.5 + 0.288i)3-s + (0.203 − 0.352i)4-s + (0.959 − 0.554i)5-s + 0.444i·6-s + (−0.174 − 0.984i)7-s + 1.08·8-s + (0.166 + 0.288i)9-s + (0.738 + 0.426i)10-s + (−0.268 + 0.465i)11-s + (0.203 − 0.117i)12-s + 0.608i·13-s + (0.589 − 0.495i)14-s + 0.639·15-s + (0.213 + 0.369i)16-s + (0.853 + 0.492i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.954 - 0.297i)\, \overline{\Lambda}(9-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+4) \, L(s)\cr =\mathstrut & (0.954 - 0.297i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $0.954 - 0.297i$
Analytic conductor: \(8.55495\)
Root analytic conductor: \(2.92488\)
Motivic weight: \(8\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (10, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :4),\ 0.954 - 0.297i)\)

Particular Values

\(L(\frac{9}{2})\) \(\approx\) \(2.89615 + 0.440923i\)
\(L(\frac12)\) \(\approx\) \(2.89615 + 0.440923i\)
\(L(5)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (-40.5 - 23.3i)T \)
7 \( 1 + (419. + 2.36e3i)T \)
good2 \( 1 + (-6.15 - 10.6i)T + (-128 + 221. i)T^{2} \)
5 \( 1 + (-599. + 346. i)T + (1.95e5 - 3.38e5i)T^{2} \)
11 \( 1 + (3.93e3 - 6.82e3i)T + (-1.07e8 - 1.85e8i)T^{2} \)
13 \( 1 - 1.73e4iT - 8.15e8T^{2} \)
17 \( 1 + (-7.12e4 - 4.11e4i)T + (3.48e9 + 6.04e9i)T^{2} \)
19 \( 1 + (5.78e4 - 3.34e4i)T + (8.49e9 - 1.47e10i)T^{2} \)
23 \( 1 + (1.31e5 + 2.27e5i)T + (-3.91e10 + 6.78e10i)T^{2} \)
29 \( 1 + 9.41e5T + 5.00e11T^{2} \)
31 \( 1 + (6.65e5 + 3.84e5i)T + (4.26e11 + 7.38e11i)T^{2} \)
37 \( 1 + (-1.75e6 - 3.03e6i)T + (-1.75e12 + 3.04e12i)T^{2} \)
41 \( 1 + 2.49e6iT - 7.98e12T^{2} \)
43 \( 1 - 5.71e6T + 1.16e13T^{2} \)
47 \( 1 + (3.24e6 - 1.87e6i)T + (1.19e13 - 2.06e13i)T^{2} \)
53 \( 1 + (2.12e6 - 3.68e6i)T + (-3.11e13 - 5.39e13i)T^{2} \)
59 \( 1 + (8.47e6 + 4.89e6i)T + (7.34e13 + 1.27e14i)T^{2} \)
61 \( 1 + (2.00e7 - 1.15e7i)T + (9.58e13 - 1.66e14i)T^{2} \)
67 \( 1 + (7.18e6 - 1.24e7i)T + (-2.03e14 - 3.51e14i)T^{2} \)
71 \( 1 - 2.47e7T + 6.45e14T^{2} \)
73 \( 1 + (4.43e7 + 2.55e7i)T + (4.03e14 + 6.98e14i)T^{2} \)
79 \( 1 + (-1.40e6 - 2.42e6i)T + (-7.58e14 + 1.31e15i)T^{2} \)
83 \( 1 - 3.15e7iT - 2.25e15T^{2} \)
89 \( 1 + (-9.41e7 + 5.43e7i)T + (1.96e15 - 3.40e15i)T^{2} \)
97 \( 1 + 4.54e7iT - 7.83e15T^{2} \)
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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

−16.40806496087550095195574017306, −14.88655355417528844350878378842, −13.97244065344417827767076822586, −12.97441765734404569347730186113, −10.58256412466351246454011097906, −9.555424053293439495739688102546, −7.58875352722203607003870277056, −5.98791016066219051696019324869, −4.40033372889625938006431509199, −1.65927664671602808410626134671, 2.07818564801305892094284391600, 3.17952572251982675574973689158, 5.80086593336898999305589357751, 7.69231403259516071786148643733, 9.465404179018445673063650084252, 10.98620621451551029087622339614, 12.44875541436144020789541105034, 13.41374984279092770560946724089, 14.61795650884522057437454049095, 16.15673731399667066982765311571

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