Properties

Label 2-91-91.90-c2-0-10
Degree $2$
Conductor $91$
Sign $1$
Analytic cond. $2.47957$
Root an. cond. $1.57466$
Motivic weight $2$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 4·4-s + 3·5-s − 7·7-s + 9·9-s + 13·13-s + 16·16-s − 25·19-s + 12·20-s − 45·23-s − 16·25-s − 28·28-s − 33·29-s + 55·31-s − 21·35-s + 36·36-s − 30·41-s − 5·43-s + 27·45-s − 81·47-s + 49·49-s + 52·52-s + 15·53-s + 90·59-s − 63·63-s + 64·64-s + 39·65-s − 29·73-s + ⋯
L(s)  = 1  + 4-s + 3/5·5-s − 7-s + 9-s + 13-s + 16-s − 1.31·19-s + 3/5·20-s − 1.95·23-s − 0.639·25-s − 28-s − 1.13·29-s + 1.77·31-s − 3/5·35-s + 36-s − 0.731·41-s − 0.116·43-s + 3/5·45-s − 1.72·47-s + 49-s + 52-s + 0.283·53-s + 1.52·59-s − 63-s + 64-s + 3/5·65-s − 0.397·73-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 91 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(3-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 91 ^{s/2} \, \Gamma_{\C}(s+1) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(91\)    =    \(7 \cdot 13\)
Sign: $1$
Analytic conductor: \(2.47957\)
Root analytic conductor: \(1.57466\)
Motivic weight: \(2\)
Rational: yes
Arithmetic: yes
Character: $\chi_{91} (90, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 91,\ (\ :1),\ 1)\)

Particular Values

\(L(\frac{3}{2})\) \(\approx\) \(1.635130797\)
\(L(\frac12)\) \(\approx\) \(1.635130797\)
\(L(2)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad7 \( 1 + p T \)
13 \( 1 - p T \)
good2 \( ( 1 - p T )( 1 + p T ) \)
3 \( ( 1 - p T )( 1 + p T ) \)
5 \( 1 - 3 T + p^{2} T^{2} \)
11 \( ( 1 - p T )( 1 + p T ) \)
17 \( ( 1 - p T )( 1 + p T ) \)
19 \( 1 + 25 T + p^{2} T^{2} \)
23 \( 1 + 45 T + p^{2} T^{2} \)
29 \( 1 + 33 T + p^{2} T^{2} \)
31 \( 1 - 55 T + p^{2} T^{2} \)
37 \( ( 1 - p T )( 1 + p T ) \)
41 \( 1 + 30 T + p^{2} T^{2} \)
43 \( 1 + 5 T + p^{2} T^{2} \)
47 \( 1 + 81 T + p^{2} T^{2} \)
53 \( 1 - 15 T + p^{2} T^{2} \)
59 \( 1 - 90 T + p^{2} T^{2} \)
61 \( ( 1 - p T )( 1 + p T ) \)
67 \( ( 1 - p T )( 1 + p T ) \)
71 \( ( 1 - p T )( 1 + p T ) \)
73 \( 1 + 29 T + p^{2} T^{2} \)
79 \( 1 - 67 T + p^{2} T^{2} \)
83 \( 1 - 159 T + p^{2} T^{2} \)
89 \( 1 + 165 T + p^{2} T^{2} \)
97 \( 1 - 131 T + p^{2} T^{2} \)
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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

−13.63197053566900405627231663589, −12.84362764067401746008965065195, −11.75412343194729896810566923688, −10.39793021676748680743601017441, −9.802138136122261652972682765143, −8.138152755193870332660220056252, −6.65743424470249546613997148518, −6.04034891729060561075714472686, −3.80993439858702611792894369613, −1.98675976576929916867054592859, 1.98675976576929916867054592859, 3.80993439858702611792894369613, 6.04034891729060561075714472686, 6.65743424470249546613997148518, 8.138152755193870332660220056252, 9.802138136122261652972682765143, 10.39793021676748680743601017441, 11.75412343194729896810566923688, 12.84362764067401746008965065195, 13.63197053566900405627231663589

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