Properties

Label 2-28-28.19-c7-0-23
Degree $2$
Conductor $28$
Sign $-0.979 - 0.203i$
Analytic cond. $8.74678$
Root an. cond. $2.95749$
Motivic weight $7$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (8.70 − 7.23i)2-s + (−45.0 − 77.9i)3-s + (23.4 − 125. i)4-s + (89.8 + 51.8i)5-s + (−955. − 353. i)6-s + (733. − 534. i)7-s + (−705. − 1.26e3i)8-s + (−2.96e3 + 5.12e3i)9-s + (1.15e3 − 198. i)10-s + (−1.38e3 + 799. i)11-s + (−1.08e4 + 3.83e3i)12-s + 5.06e3i·13-s + (2.51e3 − 9.95e3i)14-s − 9.33e3i·15-s + (−1.52e4 − 5.89e3i)16-s + (2.68e4 − 1.55e4i)17-s + ⋯
L(s)  = 1  + (0.769 − 0.639i)2-s + (−0.962 − 1.66i)3-s + (0.183 − 0.983i)4-s + (0.321 + 0.185i)5-s + (−1.80 − 0.667i)6-s + (0.808 − 0.588i)7-s + (−0.487 − 0.873i)8-s + (−1.35 + 2.34i)9-s + (0.365 − 0.0626i)10-s + (−0.313 + 0.181i)11-s + (−1.81 + 0.641i)12-s + 0.639i·13-s + (0.245 − 0.969i)14-s − 0.714i·15-s + (−0.932 − 0.360i)16-s + (1.32 − 0.766i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.979 - 0.203i)\, \overline{\Lambda}(8-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s+7/2) \, L(s)\cr =\mathstrut & (-0.979 - 0.203i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(28\)    =    \(2^{2} \cdot 7\)
Sign: $-0.979 - 0.203i$
Analytic conductor: \(8.74678\)
Root analytic conductor: \(2.95749\)
Motivic weight: \(7\)
Rational: no
Arithmetic: yes
Character: $\chi_{28} (19, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 28,\ (\ :7/2),\ -0.979 - 0.203i)\)

Particular Values

\(L(4)\) \(\approx\) \(0.184742 + 1.79689i\)
\(L(\frac12)\) \(\approx\) \(0.184742 + 1.79689i\)
\(L(\frac{9}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + (-8.70 + 7.23i)T \)
7 \( 1 + (-733. + 534. i)T \)
good3 \( 1 + (45.0 + 77.9i)T + (-1.09e3 + 1.89e3i)T^{2} \)
5 \( 1 + (-89.8 - 51.8i)T + (3.90e4 + 6.76e4i)T^{2} \)
11 \( 1 + (1.38e3 - 799. i)T + (9.74e6 - 1.68e7i)T^{2} \)
13 \( 1 - 5.06e3iT - 6.27e7T^{2} \)
17 \( 1 + (-2.68e4 + 1.55e4i)T + (2.05e8 - 3.55e8i)T^{2} \)
19 \( 1 + (-6.01e3 + 1.04e4i)T + (-4.46e8 - 7.74e8i)T^{2} \)
23 \( 1 + (5.14e4 + 2.96e4i)T + (1.70e9 + 2.94e9i)T^{2} \)
29 \( 1 - 8.74e4T + 1.72e10T^{2} \)
31 \( 1 + (2.73e4 + 4.73e4i)T + (-1.37e10 + 2.38e10i)T^{2} \)
37 \( 1 + (9.31e4 - 1.61e5i)T + (-4.74e10 - 8.22e10i)T^{2} \)
41 \( 1 + 4.24e5iT - 1.94e11T^{2} \)
43 \( 1 - 3.08e5iT - 2.71e11T^{2} \)
47 \( 1 + (2.40e5 - 4.16e5i)T + (-2.53e11 - 4.38e11i)T^{2} \)
53 \( 1 + (-3.49e5 - 6.06e5i)T + (-5.87e11 + 1.01e12i)T^{2} \)
59 \( 1 + (-5.25e4 - 9.10e4i)T + (-1.24e12 + 2.15e12i)T^{2} \)
61 \( 1 + (-1.68e6 - 9.73e5i)T + (1.57e12 + 2.72e12i)T^{2} \)
67 \( 1 + (-9.30e5 + 5.36e5i)T + (3.03e12 - 5.24e12i)T^{2} \)
71 \( 1 + 4.90e6iT - 9.09e12T^{2} \)
73 \( 1 + (-4.45e6 + 2.57e6i)T + (5.52e12 - 9.56e12i)T^{2} \)
79 \( 1 + (6.15e5 + 3.55e5i)T + (9.60e12 + 1.66e13i)T^{2} \)
83 \( 1 - 5.63e6T + 2.71e13T^{2} \)
89 \( 1 + (-3.00e6 - 1.73e6i)T + (2.21e13 + 3.83e13i)T^{2} \)
97 \( 1 - 4.80e6iT - 8.07e13T^{2} \)
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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

−14.19118297982691859645290466156, −13.68960696442084258502963777563, −12.31113119005332626077622168283, −11.59337090041967938448733865622, −10.39081724487761629001802411202, −7.65130837332710868328730972186, −6.37020903240586759566034661104, −5.03282245128900180066758766612, −2.14734071096471765606974414286, −0.816843554467072637628674161670, 3.63537959858219247030160830792, 5.21571591407056618436472087632, 5.77131205410908237836387956368, 8.320720320650291644952267679985, 9.962066114780421556220057620162, 11.33500839438584297745226465172, 12.36209858309672092653284441276, 14.34375594443092855237824815619, 15.23958337573116170586879214427, 16.11220222906937795240390749584

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