Properties

Label 2-26-13.8-c4-0-2
Degree $2$
Conductor $26$
Sign $0.577 - 0.816i$
Analytic cond. $2.68761$
Root an. cond. $1.63939$
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  + (2 + 2i)2-s + 0.899·3-s + 8i·4-s + (23.4 + 23.4i)5-s + (1.79 + 1.79i)6-s + (14.3 − 14.3i)7-s + (−16 + 16i)8-s − 80.1·9-s + 93.6i·10-s + (100. − 100. i)11-s + 7.19i·12-s + (−75.6 − 151. i)13-s + 57.2·14-s + (21.0 + 21.0i)15-s − 64·16-s − 132. i·17-s + ⋯
L(s)  = 1  + (0.5 + 0.5i)2-s + 0.0999·3-s + 0.5i·4-s + (0.936 + 0.936i)5-s + (0.0499 + 0.0499i)6-s + (0.292 − 0.292i)7-s + (−0.250 + 0.250i)8-s − 0.990·9-s + 0.936i·10-s + (0.833 − 0.833i)11-s + 0.0499i·12-s + (−0.447 − 0.894i)13-s + 0.292·14-s + (0.0935 + 0.0935i)15-s − 0.250·16-s − 0.457i·17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 26 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.577 - 0.816i)\, \overline{\Lambda}(5-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 26 ^{s/2} \, \Gamma_{\C}(s+2) \, L(s)\cr =\mathstrut & (0.577 - 0.816i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(26\)    =    \(2 \cdot 13\)
Sign: $0.577 - 0.816i$
Analytic conductor: \(2.68761\)
Root analytic conductor: \(1.63939\)
Motivic weight: \(4\)
Rational: no
Arithmetic: yes
Character: $\chi_{26} (21, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 26,\ (\ :2),\ 0.577 - 0.816i)\)

Particular Values

\(L(\frac{5}{2})\) \(\approx\) \(1.65768 + 0.858057i\)
\(L(\frac12)\) \(\approx\) \(1.65768 + 0.858057i\)
\(L(3)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + (-2 - 2i)T \)
13 \( 1 + (75.6 + 151. i)T \)
good3 \( 1 - 0.899T + 81T^{2} \)
5 \( 1 + (-23.4 - 23.4i)T + 625iT^{2} \)
7 \( 1 + (-14.3 + 14.3i)T - 2.40e3iT^{2} \)
11 \( 1 + (-100. + 100. i)T - 1.46e4iT^{2} \)
17 \( 1 + 132. iT - 8.35e4T^{2} \)
19 \( 1 + (153. + 153. i)T + 1.30e5iT^{2} \)
23 \( 1 - 428. iT - 2.79e5T^{2} \)
29 \( 1 - 37.8T + 7.07e5T^{2} \)
31 \( 1 + (-1.25e3 - 1.25e3i)T + 9.23e5iT^{2} \)
37 \( 1 + (1.35e3 - 1.35e3i)T - 1.87e6iT^{2} \)
41 \( 1 + (1.82e3 + 1.82e3i)T + 2.82e6iT^{2} \)
43 \( 1 + 1.40e3iT - 3.41e6T^{2} \)
47 \( 1 + (-1.70e3 + 1.70e3i)T - 4.87e6iT^{2} \)
53 \( 1 + 722.T + 7.89e6T^{2} \)
59 \( 1 + (2.10e3 - 2.10e3i)T - 1.21e7iT^{2} \)
61 \( 1 - 2.49e3T + 1.38e7T^{2} \)
67 \( 1 + (-5.33e3 - 5.33e3i)T + 2.01e7iT^{2} \)
71 \( 1 + (6.40e3 + 6.40e3i)T + 2.54e7iT^{2} \)
73 \( 1 + (6.70e3 - 6.70e3i)T - 2.83e7iT^{2} \)
79 \( 1 + 1.75e3T + 3.89e7T^{2} \)
83 \( 1 + (-2.13e3 - 2.13e3i)T + 4.74e7iT^{2} \)
89 \( 1 + (5.95e3 - 5.95e3i)T - 6.27e7iT^{2} \)
97 \( 1 + (2.81e3 + 2.81e3i)T + 8.85e7iT^{2} \)
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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

−17.13140678396601189237532619574, −15.37609211372429854008234825337, −14.16301772444498668977439687707, −13.72664616986314453299930426324, −11.78444026991222291525223315598, −10.41769604308446668871881349797, −8.635295926768755179814518516568, −6.83917883023644842288162573839, −5.53659633690668285959017047613, −3.03101956091323435108305190412, 1.95699641220802014260291680897, 4.62396427643908530683160710504, 6.14917448899928043985933350723, 8.717042809932116269922512860916, 9.817883987944773312900126492611, 11.63808025732807783424145792082, 12.64264079675286642827475958978, 13.97913062567809776037358247972, 14.84598763562741714028382202174, 16.77839857015640889400867458251

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