Properties

Label 1-1931-1931.1930-r1-0-0
Degree $1$
Conductor $1931$
Sign $1$
Analytic cond. $207.514$
Root an. cond. $207.514$
Motivic weight $0$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 2-s + 3-s + 4-s + 5-s − 6-s + 7-s − 8-s + 9-s − 10-s + 11-s + 12-s − 13-s − 14-s + 15-s + 16-s − 17-s − 18-s + 19-s + 20-s + 21-s − 22-s + 23-s − 24-s + 25-s + 26-s + 27-s + 28-s + ⋯
L(s)  = 1  − 2-s + 3-s + 4-s + 5-s − 6-s + 7-s − 8-s + 9-s − 10-s + 11-s + 12-s − 13-s − 14-s + 15-s + 16-s − 17-s − 18-s + 19-s + 20-s + 21-s − 22-s + 23-s − 24-s + 25-s + 26-s + 27-s + 28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 1931 ^{s/2} \, \Gamma_{\R}(s+1) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 1931 ^{s/2} \, \Gamma_{\R}(s+1) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(1\)
Conductor: \(1931\)
Sign: $1$
Analytic conductor: \(207.514\)
Root analytic conductor: \(207.514\)
Motivic weight: \(0\)
Rational: yes
Arithmetic: yes
Character: $\chi_{1931} (1930, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((1,\ 1931,\ (1:\ ),\ 1)\)

Particular Values

\(L(\frac{1}{2})\) \(\approx\) \(3.727962848\)
\(L(\frac12)\) \(\approx\) \(3.727962848\)
\(L(1)\) \(\approx\) \(1.501336456\)
\(L(1)\) \(\approx\) \(1.501336456\)

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad1931 \( 1 \)
good2 \( 1 - T \)
3 \( 1 + T \)
5 \( 1 + T \)
7 \( 1 + T \)
11 \( 1 + T \)
13 \( 1 - T \)
17 \( 1 - T \)
19 \( 1 + T \)
23 \( 1 + T \)
29 \( 1 - T \)
31 \( 1 - T \)
37 \( 1 + T \)
41 \( 1 + T \)
43 \( 1 + T \)
47 \( 1 - T \)
53 \( 1 - T \)
59 \( 1 + T \)
61 \( 1 - T \)
67 \( 1 - T \)
71 \( 1 + T \)
73 \( 1 - T \)
79 \( 1 + T \)
83 \( 1 + T \)
89 \( 1 - T \)
97 \( 1 + T \)
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   \(L(s) = \displaystyle\prod_p \ (1 - \alpha_{p}\, p^{-s})^{-1}\)

Imaginary part of the first few zeros on the critical line

−19.81478464041778028020604150323, −19.20257022937917396043443264913, −18.20100935491299242047789903855, −17.852069596572730975511681350946, −17.06850119218790645973428334394, −16.42963013333711559204589663658, −15.321903763793368180706158565828, −14.593860153206051735529393893143, −14.34890952748118754986779072896, −13.25156025305503121986130942848, −12.47063507351773485343842011026, −11.401477061655946984812619318622, −10.819947069789041551350757268243, −9.76822814414311926052147647687, −9.21587961107175725626248191205, −8.90725752115840614242171219187, −7.73631589762865542198888194041, −7.27786181533193828554362079939, −6.418020307952072325972565068365, −5.33788076508116768277015516672, −4.38581263932090415720127349232, −3.15335464293640083924355884389, −2.28336066303571707970173301523, −1.714601307885541751469015559528, −0.918443109348657983819643774463, 0.918443109348657983819643774463, 1.714601307885541751469015559528, 2.28336066303571707970173301523, 3.15335464293640083924355884389, 4.38581263932090415720127349232, 5.33788076508116768277015516672, 6.418020307952072325972565068365, 7.27786181533193828554362079939, 7.73631589762865542198888194041, 8.90725752115840614242171219187, 9.21587961107175725626248191205, 9.76822814414311926052147647687, 10.819947069789041551350757268243, 11.401477061655946984812619318622, 12.47063507351773485343842011026, 13.25156025305503121986130942848, 14.34890952748118754986779072896, 14.593860153206051735529393893143, 15.321903763793368180706158565828, 16.42963013333711559204589663658, 17.06850119218790645973428334394, 17.852069596572730975511681350946, 18.20100935491299242047789903855, 19.20257022937917396043443264913, 19.81478464041778028020604150323

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