Properties

Label 2-7-7.4-c13-0-2
Degree $2$
Conductor $7$
Sign $0.135 - 0.990i$
Analytic cond. $7.50616$
Root an. cond. $2.73973$
Motivic weight $13$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (13.6 + 23.5i)2-s + (−273. + 474. i)3-s + (3.72e3 − 6.45e3i)4-s + (1.68e4 + 2.92e4i)5-s − 1.49e4·6-s + (−1.74e5 + 2.57e5i)7-s + 4.25e5·8-s + (6.47e5 + 1.12e6i)9-s + (−4.59e5 + 7.95e5i)10-s + (−4.55e6 + 7.88e6i)11-s + (2.03e6 + 3.53e6i)12-s + 2.25e7·13-s + (−8.45e6 − 6.16e5i)14-s − 1.84e7·15-s + (−2.47e7 − 4.28e7i)16-s + (2.90e7 − 5.02e7i)17-s + ⋯
L(s)  = 1  + (0.150 + 0.260i)2-s + (−0.216 + 0.375i)3-s + (0.454 − 0.787i)4-s + (0.482 + 0.835i)5-s − 0.130·6-s + (−0.561 + 0.827i)7-s + 0.574·8-s + (0.405 + 0.703i)9-s + (−0.145 + 0.251i)10-s + (−0.775 + 1.34i)11-s + (0.197 + 0.341i)12-s + 1.29·13-s + (−0.299 − 0.0218i)14-s − 0.418·15-s + (−0.368 − 0.638i)16-s + (0.291 − 0.505i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 7 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.135 - 0.990i)\, \overline{\Lambda}(14-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 7 ^{s/2} \, \Gamma_{\C}(s+13/2) \, L(s)\cr =\mathstrut & (0.135 - 0.990i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(7\)
Sign: $0.135 - 0.990i$
Analytic conductor: \(7.50616\)
Root analytic conductor: \(2.73973\)
Motivic weight: \(13\)
Rational: no
Arithmetic: yes
Character: $\chi_{7} (4, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 7,\ (\ :13/2),\ 0.135 - 0.990i)\)

Particular Values

\(L(7)\) \(\approx\) \(1.40459 + 1.22528i\)
\(L(\frac12)\) \(\approx\) \(1.40459 + 1.22528i\)
\(L(\frac{15}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad7 \( 1 + (1.74e5 - 2.57e5i)T \)
good2 \( 1 + (-13.6 - 23.5i)T + (-4.09e3 + 7.09e3i)T^{2} \)
3 \( 1 + (273. - 474. i)T + (-7.97e5 - 1.38e6i)T^{2} \)
5 \( 1 + (-1.68e4 - 2.92e4i)T + (-6.10e8 + 1.05e9i)T^{2} \)
11 \( 1 + (4.55e6 - 7.88e6i)T + (-1.72e13 - 2.98e13i)T^{2} \)
13 \( 1 - 2.25e7T + 3.02e14T^{2} \)
17 \( 1 + (-2.90e7 + 5.02e7i)T + (-4.95e15 - 8.57e15i)T^{2} \)
19 \( 1 + (1.30e8 + 2.25e8i)T + (-2.10e16 + 3.64e16i)T^{2} \)
23 \( 1 + (-4.93e8 - 8.55e8i)T + (-2.52e17 + 4.36e17i)T^{2} \)
29 \( 1 - 3.04e8T + 1.02e19T^{2} \)
31 \( 1 + (-5.06e8 + 8.77e8i)T + (-1.22e19 - 2.11e19i)T^{2} \)
37 \( 1 + (5.24e9 + 9.07e9i)T + (-1.21e20 + 2.10e20i)T^{2} \)
41 \( 1 + 8.80e9T + 9.25e20T^{2} \)
43 \( 1 - 1.24e10T + 1.71e21T^{2} \)
47 \( 1 + (1.94e10 + 3.36e10i)T + (-2.73e21 + 4.72e21i)T^{2} \)
53 \( 1 + (-2.30e10 + 3.99e10i)T + (-1.30e22 - 2.25e22i)T^{2} \)
59 \( 1 + (-2.82e11 + 4.89e11i)T + (-5.24e22 - 9.09e22i)T^{2} \)
61 \( 1 + (-3.51e11 - 6.08e11i)T + (-8.09e22 + 1.40e23i)T^{2} \)
67 \( 1 + (3.16e11 - 5.47e11i)T + (-2.74e23 - 4.74e23i)T^{2} \)
71 \( 1 - 1.25e12T + 1.16e24T^{2} \)
73 \( 1 + (-8.27e11 + 1.43e12i)T + (-8.35e23 - 1.44e24i)T^{2} \)
79 \( 1 + (-1.19e12 - 2.07e12i)T + (-2.33e24 + 4.04e24i)T^{2} \)
83 \( 1 - 8.40e11T + 8.87e24T^{2} \)
89 \( 1 + (-1.16e12 - 2.01e12i)T + (-1.09e25 + 1.90e25i)T^{2} \)
97 \( 1 + 7.28e12T + 6.73e25T^{2} \)
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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

−19.25493771092016381725741032946, −18.09737753110994795284936914649, −15.91564359244608786807724035807, −15.15183006559431195362014093348, −13.35257477986194946007273934149, −10.98106091058687139010970724664, −9.817961277853320470563350404905, −6.88628272990497838907145156105, −5.30094980453390818294671175153, −2.25568912853358882026861363893, 1.05162068651292958410399294702, 3.61026520961460632666900944877, 6.33650073416726159071005581856, 8.386636223612333715537693176580, 10.72140003115610196005196098720, 12.62049516034112976744881404308, 13.39736375522612228345842433192, 16.15495940163869025266143163637, 17.00352686883674342136274356026, 18.76316864973351844862670942431

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