Properties

Label 2-21-21.2-c32-0-9
Degree $2$
Conductor $21$
Sign $0.643 - 0.765i$
Analytic cond. $136.219$
Root an. cond. $11.6713$
Motivic weight $32$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−1.07e5 − 6.21e4i)2-s + (−3.45e7 + 2.56e7i)3-s + (5.58e9 + 9.67e9i)4-s + (4.70e10 + 2.71e10i)5-s + (5.31e12 − 6.13e11i)6-s + (−5.64e12 − 3.27e13i)7-s + (−0.0937 − 8.55e14i)8-s + (5.37e14 − 1.77e15i)9-s + (−3.37e15 − 5.85e15i)10-s + (7.71e16 − 4.45e16i)11-s + (−4.41e17 − 1.91e17i)12-s − 7.94e17·13-s + (−1.42e18 + 3.87e18i)14-s + (−2.32e18 + 2.67e17i)15-s + (−2.91e19 + 5.05e19i)16-s + (2.93e19 − 1.69e19i)17-s + ⋯
L(s)  = 1  + (−1.64 − 0.948i)2-s + (−0.803 + 0.595i)3-s + (1.30 + 2.25i)4-s + (0.308 + 0.178i)5-s + (1.88 − 0.217i)6-s + (−0.169 − 0.985i)7-s − 3.03i·8-s + (0.289 − 0.957i)9-s + (−0.337 − 0.585i)10-s + (1.67 − 0.969i)11-s + (−2.38 − 1.03i)12-s − 1.19·13-s + (−0.656 + 1.78i)14-s + (−0.353 + 0.0407i)15-s + (−1.58 + 2.74i)16-s + (0.603 − 0.348i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.643 - 0.765i)\, \overline{\Lambda}(33-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+16) \, L(s)\cr =\mathstrut & (0.643 - 0.765i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $0.643 - 0.765i$
Analytic conductor: \(136.219\)
Root analytic conductor: \(11.6713\)
Motivic weight: \(32\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (2, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :16),\ 0.643 - 0.765i)\)

Particular Values

\(L(\frac{33}{2})\) \(\approx\) \(0.2205920261\)
\(L(\frac12)\) \(\approx\) \(0.2205920261\)
\(L(17)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (3.45e7 - 2.56e7i)T \)
7 \( 1 + (5.64e12 + 3.27e13i)T \)
good2 \( 1 + (1.07e5 + 6.21e4i)T + (2.14e9 + 3.71e9i)T^{2} \)
5 \( 1 + (-4.70e10 - 2.71e10i)T + (1.16e22 + 2.01e22i)T^{2} \)
11 \( 1 + (-7.71e16 + 4.45e16i)T + (1.05e33 - 1.82e33i)T^{2} \)
13 \( 1 + 7.94e17T + 4.42e35T^{2} \)
17 \( 1 + (-2.93e19 + 1.69e19i)T + (1.18e39 - 2.05e39i)T^{2} \)
19 \( 1 + (8.82e19 - 1.52e20i)T + (-4.15e40 - 7.20e40i)T^{2} \)
23 \( 1 + (3.84e21 + 2.22e21i)T + (1.88e43 + 3.25e43i)T^{2} \)
29 \( 1 - 1.60e23iT - 6.26e46T^{2} \)
31 \( 1 + (1.34e23 + 2.32e23i)T + (-2.64e47 + 4.58e47i)T^{2} \)
37 \( 1 + (7.18e24 - 1.24e25i)T + (-7.61e49 - 1.31e50i)T^{2} \)
41 \( 1 + 9.83e25iT - 4.06e51T^{2} \)
43 \( 1 + 9.19e25T + 1.86e52T^{2} \)
47 \( 1 + (-1.47e26 - 8.51e25i)T + (1.60e53 + 2.78e53i)T^{2} \)
53 \( 1 + (3.89e27 - 2.24e27i)T + (7.51e54 - 1.30e55i)T^{2} \)
59 \( 1 + (-2.66e26 + 1.53e26i)T + (2.32e56 - 4.02e56i)T^{2} \)
61 \( 1 + (2.79e28 - 4.84e28i)T + (-6.75e56 - 1.16e57i)T^{2} \)
67 \( 1 + (-1.99e28 - 3.45e28i)T + (-1.35e58 + 2.35e58i)T^{2} \)
71 \( 1 - 6.55e29iT - 1.73e59T^{2} \)
73 \( 1 + (3.41e29 + 5.91e29i)T + (-2.11e59 + 3.66e59i)T^{2} \)
79 \( 1 + (4.19e28 - 7.26e28i)T + (-2.64e60 - 4.58e60i)T^{2} \)
83 \( 1 + 7.23e30iT - 2.57e61T^{2} \)
89 \( 1 + (1.20e31 + 6.96e30i)T + (1.20e62 + 2.07e62i)T^{2} \)
97 \( 1 - 6.65e31T + 3.77e63T^{2} \)
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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

−11.59160878610322072012863921573, −10.42327499807718098892552582423, −9.889759329851282830416406851120, −8.836515241981622340086713706236, −7.31249751480319460541006009659, −6.29076024120616763455380690241, −4.13468445102567660624734217299, −3.20950939186916434177523085726, −1.58441580607853465831455330864, −0.67616087335380247644592014130, 0.13233633959119931121537046929, 1.48640536786542359603448040896, 2.03124874368343780176946402062, 5.03133663313238123281000713558, 6.08879744653101817558821324933, 6.85664073533609625357482525440, 7.88281044249269439109473457110, 9.277604896257719223478318420708, 9.873149347873675767549683667224, 11.45475306364329619370584361166

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