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Properties

Label 2-15-15.2-c3-0-1
Degree $2$
Conductor $15$
Sign $0.827 - 0.562i$
Analytic cond. $0.885028$
Root an. cond. $0.940759$
Motivic weight $3$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−1.18 + 1.18i)2-s + (5.11 + 0.932i)3-s + 5.17i·4-s + (−2.48 − 10.9i)5-s + (−7.17 + 4.96i)6-s + (−13.3 − 13.3i)7-s + (−15.6 − 15.6i)8-s + (25.2 + 9.53i)9-s + (15.8 + 10i)10-s + 28.7i·11-s + (−4.83 + 26.4i)12-s + (14.1 − 14.1i)13-s + 31.7·14-s + (−2.51 − 58.0i)15-s − 4.25·16-s + (−18.5 + 18.5i)17-s + ⋯
L(s)  = 1  + (−0.419 + 0.419i)2-s + (0.983 + 0.179i)3-s + 0.647i·4-s + (−0.221 − 0.975i)5-s + (−0.488 + 0.337i)6-s + (−0.721 − 0.721i)7-s + (−0.691 − 0.691i)8-s + (0.935 + 0.353i)9-s + (0.502 + 0.316i)10-s + 0.787i·11-s + (−0.116 + 0.636i)12-s + (0.302 − 0.302i)13-s + 0.605·14-s + (−0.0433 − 0.999i)15-s − 0.0664·16-s + (−0.264 + 0.264i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 15 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.827 - 0.562i)\, \overline{\Lambda}(4-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 15 ^{s/2} \, \Gamma_{\C}(s+3/2) \, L(s)\cr =\mathstrut & (0.827 - 0.562i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(15\)    =    \(3 \cdot 5\)
Sign: $0.827 - 0.562i$
Analytic conductor: \(0.885028\)
Root analytic conductor: \(0.940759\)
Motivic weight: \(3\)
Rational: no
Arithmetic: yes
Character: $\chi_{15} (2, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 15,\ (\ :3/2),\ 0.827 - 0.562i)\)

Particular Values

\(L(2)\) \(\approx\) \(0.933936 + 0.287312i\)
\(L(\frac12)\) \(\approx\) \(0.933936 + 0.287312i\)
\(L(\frac{5}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (-5.11 - 0.932i)T \)
5 \( 1 + (2.48 + 10.9i)T \)
good2 \( 1 + (1.18 - 1.18i)T - 8iT^{2} \)
7 \( 1 + (13.3 + 13.3i)T + 343iT^{2} \)
11 \( 1 - 28.7iT - 1.33e3T^{2} \)
13 \( 1 + (-14.1 + 14.1i)T - 2.19e3iT^{2} \)
17 \( 1 + (18.5 - 18.5i)T - 4.91e3iT^{2} \)
19 \( 1 - 49.0iT - 6.85e3T^{2} \)
23 \( 1 + (-37.7 - 37.7i)T + 1.21e4iT^{2} \)
29 \( 1 + 125.T + 2.43e4T^{2} \)
31 \( 1 - 247.T + 2.97e4T^{2} \)
37 \( 1 + (127. + 127. i)T + 5.06e4iT^{2} \)
41 \( 1 + 390. iT - 6.89e4T^{2} \)
43 \( 1 + (39.3 - 39.3i)T - 7.95e4iT^{2} \)
47 \( 1 + (124. - 124. i)T - 1.03e5iT^{2} \)
53 \( 1 + (-160. - 160. i)T + 1.48e5iT^{2} \)
59 \( 1 - 729.T + 2.05e5T^{2} \)
61 \( 1 - 2T + 2.26e5T^{2} \)
67 \( 1 + (329. + 329. i)T + 3.00e5iT^{2} \)
71 \( 1 - 171. iT - 3.57e5T^{2} \)
73 \( 1 + (279. - 279. i)T - 3.89e5iT^{2} \)
79 \( 1 - 48.0iT - 4.93e5T^{2} \)
83 \( 1 + (144. + 144. i)T + 5.71e5iT^{2} \)
89 \( 1 + 1.41e3T + 7.04e5T^{2} \)
97 \( 1 + (-908. - 908. i)T + 9.12e5iT^{2} \)
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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

−19.19300339549821438778472856279, −17.47615302026504461901797489048, −16.33759711317536899547976342217, −15.39563343738707901094380443663, −13.43054321387428737362085751487, −12.49743549338424276033983434725, −9.832573702229850873819797035896, −8.576976398107080362336417453962, −7.30324020632429952807597508995, −3.90055542462926303190335709383, 2.82304810281741027661711502846, 6.50255990905518713887888240877, 8.688393218705620137484404251792, 9.964144928199166960579502353493, 11.49630306096740907800884784680, 13.51618850146190279934183483122, 14.77626857759741053425400027435, 15.73209268883751784536857699872, 18.22344697396416525847690746252, 18.98606645131647495282953597326

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