Properties

Label 2-28-28.27-c3-0-8
Degree $2$
Conductor $28$
Sign $0.826 + 0.562i$
Analytic cond. $1.65205$
Root an. cond. $1.28532$
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  + (2.5 − 1.32i)2-s + (4.5 − 6.61i)4-s + 18.5i·7-s + (2.5 − 22.4i)8-s − 27·9-s + 26.4i·11-s + (24.5 + 46.3i)14-s + (−23.5 − 59.5i)16-s + (−67.5 + 35.7i)18-s + (35 + 66.1i)22-s − 216. i·23-s + 125·25-s + (122. + 83.3i)28-s + 166·29-s + (−137.5 − 117. i)32-s + ⋯
L(s)  = 1  + (0.883 − 0.467i)2-s + (0.562 − 0.826i)4-s + 0.999i·7-s + (0.110 − 0.993i)8-s − 9-s + 0.725i·11-s + (0.467 + 0.883i)14-s + (−0.367 − 0.930i)16-s + (−0.883 + 0.467i)18-s + (0.339 + 0.640i)22-s − 1.96i·23-s + 25-s + (0.826 + 0.562i)28-s + 1.06·29-s + (−0.759 − 0.650i)32-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.826 + 0.562i)\, \overline{\Lambda}(4-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 28 ^{s/2} \, \Gamma_{\C}(s+3/2) \, L(s)\cr =\mathstrut & (0.826 + 0.562i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(28\)    =    \(2^{2} \cdot 7\)
Sign: $0.826 + 0.562i$
Analytic conductor: \(1.65205\)
Root analytic conductor: \(1.28532\)
Motivic weight: \(3\)
Rational: no
Arithmetic: yes
Character: $\chi_{28} (27, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 28,\ (\ :3/2),\ 0.826 + 0.562i)\)

Particular Values

\(L(2)\) \(\approx\) \(1.67237 - 0.514951i\)
\(L(\frac12)\) \(\approx\) \(1.67237 - 0.514951i\)
\(L(\frac{5}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 + (-2.5 + 1.32i)T \)
7 \( 1 - 18.5iT \)
good3 \( 1 + 27T^{2} \)
5 \( 1 - 125T^{2} \)
11 \( 1 - 26.4iT - 1.33e3T^{2} \)
13 \( 1 - 2.19e3T^{2} \)
17 \( 1 - 4.91e3T^{2} \)
19 \( 1 + 6.85e3T^{2} \)
23 \( 1 + 216. iT - 1.21e4T^{2} \)
29 \( 1 - 166T + 2.43e4T^{2} \)
31 \( 1 + 2.97e4T^{2} \)
37 \( 1 + 450T + 5.06e4T^{2} \)
41 \( 1 - 6.89e4T^{2} \)
43 \( 1 - 534. iT - 7.95e4T^{2} \)
47 \( 1 + 1.03e5T^{2} \)
53 \( 1 - 590T + 1.48e5T^{2} \)
59 \( 1 + 2.05e5T^{2} \)
61 \( 1 - 2.26e5T^{2} \)
67 \( 1 - 809. iT - 3.00e5T^{2} \)
71 \( 1 + 978. iT - 3.57e5T^{2} \)
73 \( 1 - 3.89e5T^{2} \)
79 \( 1 + 238. iT - 4.93e5T^{2} \)
83 \( 1 + 5.71e5T^{2} \)
89 \( 1 - 7.04e5T^{2} \)
97 \( 1 - 9.12e5T^{2} \)
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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

−16.34874616429379835587257917946, −15.04334284307335384620963560684, −14.26097431025590630275121778250, −12.67101821545341736525998521168, −11.83946205848986778224486677400, −10.44240153339745126356822246640, −8.756510718150504070596558007508, −6.45097191580134934642806104348, −4.95504488697011621121989365465, −2.66561517619534552081322782857, 3.46714946368937619316805036946, 5.41970077640612376724332984629, 7.03334230120737163634274273655, 8.522927623651052168678769828541, 10.76047150926189384596856759000, 11.92833156374496356710178511261, 13.54993775569532649110878885228, 14.13770083321278279876189366394, 15.57021207718315343897723480586, 16.77281248002648551169840318575

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