Properties

Label 2-21-7.3-c10-0-10
Degree $2$
Conductor $21$
Sign $-0.493 + 0.869i$
Analytic cond. $13.3425$
Root an. cond. $3.65273$
Motivic weight $10$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−4.98 − 8.63i)2-s + (−121.5 − 70.1i)3-s + (462. − 800. i)4-s + (2.61e3 − 1.51e3i)5-s + 1.39e3i·6-s + (1.34e4 + 1.00e4i)7-s − 1.94e4·8-s + (9.84e3 + 1.70e4i)9-s + (−2.61e4 − 1.50e4i)10-s + (6.41e4 − 1.11e5i)11-s + (−1.12e5 + 6.48e4i)12-s − 4.12e5i·13-s + (1.99e4 − 1.66e5i)14-s − 4.24e5·15-s + (−3.76e5 − 6.51e5i)16-s + (9.96e3 + 5.75e3i)17-s + ⋯
L(s)  = 1  + (−0.155 − 0.269i)2-s + (−0.5 − 0.288i)3-s + (0.451 − 0.781i)4-s + (0.837 − 0.483i)5-s + 0.179i·6-s + (0.800 + 0.599i)7-s − 0.593·8-s + (0.166 + 0.288i)9-s + (−0.261 − 0.150i)10-s + (0.398 − 0.689i)11-s + (−0.451 + 0.260i)12-s − 1.11i·13-s + (0.0371 − 0.309i)14-s − 0.558·15-s + (−0.358 − 0.621i)16-s + (0.00701 + 0.00405i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.493 + 0.869i)\, \overline{\Lambda}(11-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+5) \, L(s)\cr =\mathstrut & (-0.493 + 0.869i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $-0.493 + 0.869i$
Analytic conductor: \(13.3425\)
Root analytic conductor: \(3.65273\)
Motivic weight: \(10\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (10, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :5),\ -0.493 + 0.869i)\)

Particular Values

\(L(\frac{11}{2})\) \(\approx\) \(0.885480 - 1.52086i\)
\(L(\frac12)\) \(\approx\) \(0.885480 - 1.52086i\)
\(L(6)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (121.5 + 70.1i)T \)
7 \( 1 + (-1.34e4 - 1.00e4i)T \)
good2 \( 1 + (4.98 + 8.63i)T + (-512 + 886. i)T^{2} \)
5 \( 1 + (-2.61e3 + 1.51e3i)T + (4.88e6 - 8.45e6i)T^{2} \)
11 \( 1 + (-6.41e4 + 1.11e5i)T + (-1.29e10 - 2.24e10i)T^{2} \)
13 \( 1 + 4.12e5iT - 1.37e11T^{2} \)
17 \( 1 + (-9.96e3 - 5.75e3i)T + (1.00e12 + 1.74e12i)T^{2} \)
19 \( 1 + (1.36e6 - 7.88e5i)T + (3.06e12 - 5.30e12i)T^{2} \)
23 \( 1 + (4.66e6 + 8.07e6i)T + (-2.07e13 + 3.58e13i)T^{2} \)
29 \( 1 + 2.68e6T + 4.20e14T^{2} \)
31 \( 1 + (-6.30e6 - 3.63e6i)T + (4.09e14 + 7.09e14i)T^{2} \)
37 \( 1 + (-5.42e7 - 9.40e7i)T + (-2.40e15 + 4.16e15i)T^{2} \)
41 \( 1 + 1.33e8iT - 1.34e16T^{2} \)
43 \( 1 + 1.04e6T + 2.16e16T^{2} \)
47 \( 1 + (-1.04e8 + 6.01e7i)T + (2.62e16 - 4.55e16i)T^{2} \)
53 \( 1 + (-2.92e8 + 5.06e8i)T + (-8.74e16 - 1.51e17i)T^{2} \)
59 \( 1 + (8.72e8 + 5.03e8i)T + (2.55e17 + 4.42e17i)T^{2} \)
61 \( 1 + (-6.53e8 + 3.77e8i)T + (3.56e17 - 6.17e17i)T^{2} \)
67 \( 1 + (1.06e9 - 1.84e9i)T + (-9.11e17 - 1.57e18i)T^{2} \)
71 \( 1 - 2.55e9T + 3.25e18T^{2} \)
73 \( 1 + (-2.13e9 - 1.23e9i)T + (2.14e18 + 3.72e18i)T^{2} \)
79 \( 1 + (-1.03e9 - 1.79e9i)T + (-4.73e18 + 8.19e18i)T^{2} \)
83 \( 1 - 5.24e9iT - 1.55e19T^{2} \)
89 \( 1 + (-3.07e9 + 1.77e9i)T + (1.55e19 - 2.70e19i)T^{2} \)
97 \( 1 + 1.54e10iT - 7.37e19T^{2} \)
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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

−15.31275944960110235839094395748, −14.06527345815743614535672995222, −12.50828081244003116789340808734, −11.24547648660179800048202455209, −10.07080420542483183717377257348, −8.468300834117113771133776301423, −6.20623592516354652782147745505, −5.28460460598058767266545477514, −2.15442201723006423065917282800, −0.843167403110878071124009481481, 1.96628410638076226430817604075, 4.20707647340712334423037698473, 6.27475723251762389812021049148, 7.49965097339518588763610934692, 9.398139473861589785992660053121, 10.92426035686104830601956691565, 12.01706207795901713997551890319, 13.72540928596394164481463249372, 15.00698243685397941355098103000, 16.49037603812762227136291870189

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