Properties

Label 2-28-28.23-c4-0-12
Degree $2$
Conductor $28$
Sign $-0.528 + 0.848i$
Analytic cond. $2.89435$
Root an. cond. $1.70128$
Motivic weight $4$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (0.123 − 3.99i)2-s + (2.78 − 1.60i)3-s + (−15.9 − 0.987i)4-s + (16.3 − 28.3i)5-s + (−6.08 − 11.3i)6-s + (−41.5 − 25.9i)7-s + (−5.92 + 63.7i)8-s + (−35.3 + 61.1i)9-s + (−111. − 68.9i)10-s + (185. − 106. i)11-s + (−46.0 + 22.9i)12-s + 136.·13-s + (−108. + 162. i)14-s − 105. i·15-s + (254. + 31.5i)16-s + (138. + 240. i)17-s + ⋯
L(s)  = 1  + (0.0308 − 0.999i)2-s + (0.309 − 0.178i)3-s + (−0.998 − 0.0617i)4-s + (0.654 − 1.13i)5-s + (−0.168 − 0.314i)6-s + (−0.848 − 0.529i)7-s + (−0.0925 + 0.995i)8-s + (−0.436 + 0.755i)9-s + (−1.11 − 0.689i)10-s + (1.53 − 0.884i)11-s + (−0.319 + 0.159i)12-s + 0.808·13-s + (−0.555 + 0.831i)14-s − 0.467i·15-s + (0.992 + 0.123i)16-s + (0.480 + 0.831i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.528 + 0.848i)\, \overline{\Lambda}(5-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s+2) \, L(s)\cr =\mathstrut & (-0.528 + 0.848i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(28\)    =    \(2^{2} \cdot 7\)
Sign: $-0.528 + 0.848i$
Analytic conductor: \(2.89435\)
Root analytic conductor: \(1.70128\)
Motivic weight: \(4\)
Rational: no
Arithmetic: yes
Character: $\chi_{28} (23, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 28,\ (\ :2),\ -0.528 + 0.848i)\)

Particular Values

\(L(\frac{5}{2})\) \(\approx\) \(0.686371 - 1.23591i\)
\(L(\frac12)\) \(\approx\) \(0.686371 - 1.23591i\)
\(L(3)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + (-0.123 + 3.99i)T \)
7 \( 1 + (41.5 + 25.9i)T \)
good3 \( 1 + (-2.78 + 1.60i)T + (40.5 - 70.1i)T^{2} \)
5 \( 1 + (-16.3 + 28.3i)T + (-312.5 - 541. i)T^{2} \)
11 \( 1 + (-185. + 106. i)T + (7.32e3 - 1.26e4i)T^{2} \)
13 \( 1 - 136.T + 2.85e4T^{2} \)
17 \( 1 + (-138. - 240. i)T + (-4.17e4 + 7.23e4i)T^{2} \)
19 \( 1 + (-103. - 59.9i)T + (6.51e4 + 1.12e5i)T^{2} \)
23 \( 1 + (132. + 76.4i)T + (1.39e5 + 2.42e5i)T^{2} \)
29 \( 1 + 383.T + 7.07e5T^{2} \)
31 \( 1 + (555. - 320. i)T + (4.61e5 - 7.99e5i)T^{2} \)
37 \( 1 + (-488. + 845. i)T + (-9.37e5 - 1.62e6i)T^{2} \)
41 \( 1 + 2.37e3T + 2.82e6T^{2} \)
43 \( 1 + 474. iT - 3.41e6T^{2} \)
47 \( 1 + (-2.98e3 - 1.72e3i)T + (2.43e6 + 4.22e6i)T^{2} \)
53 \( 1 + (184. + 319. i)T + (-3.94e6 + 6.83e6i)T^{2} \)
59 \( 1 + (3.80e3 - 2.19e3i)T + (6.05e6 - 1.04e7i)T^{2} \)
61 \( 1 + (-1.00e3 + 1.74e3i)T + (-6.92e6 - 1.19e7i)T^{2} \)
67 \( 1 + (-265. + 153. i)T + (1.00e7 - 1.74e7i)T^{2} \)
71 \( 1 + 1.76e3iT - 2.54e7T^{2} \)
73 \( 1 + (-3.59e3 - 6.23e3i)T + (-1.41e7 + 2.45e7i)T^{2} \)
79 \( 1 + (-1.31e3 - 761. i)T + (1.94e7 + 3.37e7i)T^{2} \)
83 \( 1 - 9.69e3iT - 4.74e7T^{2} \)
89 \( 1 + (-846. + 1.46e3i)T + (-3.13e7 - 5.43e7i)T^{2} \)
97 \( 1 + 9.74e3T + 8.85e7T^{2} \)
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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

−16.58305302356089018998662478442, −14.12205478345613795623559271410, −13.46619015896533688091091595770, −12.41488187820443883698055480801, −10.89000925497512449848086461140, −9.401602893443503749458662085017, −8.502127488134078550650028817293, −5.78222743432575203673083994750, −3.72682756622765492314544256564, −1.29964527528233466179560196032, 3.48007930921582713998912238139, 6.05426021644284289597948874339, 6.91606991090475100215349972350, 9.081966238731777139515521184312, 9.811498573794897242255491889913, 11.99850377151191935579915340137, 13.67814586370688143134711364895, 14.61004816515856767564798704641, 15.38926952556718935421073800712, 16.83670076570352538185254074057

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