Properties

Label 2-21-7.4-c29-0-32
Degree $2$
Conductor $21$
Sign $-0.997 - 0.0712i$
Analytic cond. $111.883$
Root an. cond. $10.5775$
Motivic weight $29$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−5.21e3 − 9.03e3i)2-s + (−2.39e6 + 4.14e6i)3-s + (2.14e8 − 3.70e8i)4-s + (−6.54e9 − 1.13e10i)5-s + (4.98e10 + 3.81e−6i)6-s + (1.56e12 − 8.84e11i)7-s + (−1.00e13 − 0.000732i)8-s + (−1.14e13 − 1.98e13i)9-s + (−6.83e13 + 1.18e14i)10-s + (−3.73e14 + 6.47e14i)11-s + (1.02e15 + 1.77e15i)12-s + 1.37e16·13-s + (−1.61e16 − 9.48e15i)14-s + 6.26e16·15-s + (−6.24e16 − 1.08e17i)16-s + (1.73e17 − 3.00e17i)17-s + ⋯
L(s)  = 1  + (−0.225 − 0.389i)2-s + (−0.288 + 0.499i)3-s + (0.398 − 0.690i)4-s + (−0.479 − 0.831i)5-s + 0.259·6-s + (0.869 − 0.493i)7-s − 0.809·8-s + (−0.166 − 0.288i)9-s + (−0.216 + 0.374i)10-s + (−0.296 + 0.513i)11-s + (0.230 + 0.398i)12-s + 0.968·13-s + (−0.388 − 0.228i)14-s + 0.554·15-s + (−0.216 − 0.375i)16-s + (0.250 − 0.433i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.997 - 0.0712i)\, \overline{\Lambda}(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & (-0.997 - 0.0712i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $-0.997 - 0.0712i$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (4, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ -0.997 - 0.0712i)\)

Particular Values

\(L(15)\) \(\approx\) \(1.514090984\)
\(L(\frac12)\) \(\approx\) \(1.514090984\)
\(L(\frac{31}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (2.39e6 - 4.14e6i)T \)
7 \( 1 + (-1.56e12 + 8.84e11i)T \)
good2 \( 1 + (5.21e3 + 9.03e3i)T + (-2.68e8 + 4.64e8i)T^{2} \)
5 \( 1 + (6.54e9 + 1.13e10i)T + (-9.31e19 + 1.61e20i)T^{2} \)
11 \( 1 + (3.73e14 - 6.47e14i)T + (-7.93e29 - 1.37e30i)T^{2} \)
13 \( 1 - 1.37e16T + 2.01e32T^{2} \)
17 \( 1 + (-1.73e17 + 3.00e17i)T + (-2.40e35 - 4.17e35i)T^{2} \)
19 \( 1 + (2.08e18 + 3.60e18i)T + (-6.06e36 + 1.05e37i)T^{2} \)
23 \( 1 + (2.27e19 + 3.93e19i)T + (-1.54e39 + 2.67e39i)T^{2} \)
29 \( 1 - 1.52e21T + 2.56e42T^{2} \)
31 \( 1 + (-2.67e21 + 4.63e21i)T + (-8.88e42 - 1.53e43i)T^{2} \)
37 \( 1 + (6.66e21 + 1.15e22i)T + (-1.50e45 + 2.60e45i)T^{2} \)
41 \( 1 - 1.78e23T + 5.89e46T^{2} \)
43 \( 1 - 2.73e23T + 2.34e47T^{2} \)
47 \( 1 + (-3.16e23 - 5.48e23i)T + (-1.54e48 + 2.68e48i)T^{2} \)
53 \( 1 + (5.13e24 - 8.88e24i)T + (-5.04e49 - 8.74e49i)T^{2} \)
59 \( 1 + (-2.57e24 + 4.46e24i)T + (-1.13e51 - 1.95e51i)T^{2} \)
61 \( 1 + (4.16e25 + 7.21e25i)T + (-2.97e51 + 5.15e51i)T^{2} \)
67 \( 1 + (-1.90e26 + 3.30e26i)T + (-4.52e52 - 7.82e52i)T^{2} \)
71 \( 1 - 1.14e27T + 4.85e53T^{2} \)
73 \( 1 + (-8.24e24 + 1.42e25i)T + (-5.43e53 - 9.41e53i)T^{2} \)
79 \( 1 + (5.91e26 + 1.02e27i)T + (-5.37e54 + 9.30e54i)T^{2} \)
83 \( 1 - 2.16e27T + 4.50e55T^{2} \)
89 \( 1 + (5.27e27 + 9.13e27i)T + (-1.70e56 + 2.95e56i)T^{2} \)
97 \( 1 + 8.93e28T + 4.13e57T^{2} \)
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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

−11.27767907758653313361196188034, −10.53473605356265689122931038580, −9.231438672300708409347665301974, −8.046819787350474943425252562852, −6.41427406094960497169674287029, −5.01541853796475524286413311189, −4.23173670899426501404771747592, −2.43902257797653962914132656712, −1.06562736369914441791235937496, −0.40800492564540004971227048671, 1.36579020397556599026238816457, 2.68216608240611265283722693786, 3.79163052653220761725966713086, 5.70923311413396797055631468501, 6.69416251870285787761151684996, 7.916457124481477373722091589955, 8.477755949357483399162884675638, 10.71633121338275798656292335717, 11.54928963705634041568492948368, 12.51218612772114018065172695180

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