Properties

Label 1840.2.a.s
Level $1840$
Weight $2$
Character orbit 1840.a
Self dual yes
Analytic conductor $14.692$
Analytic rank $0$
Dimension $3$
CM no
Inner twists $1$

Related objects

Downloads

Learn more

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1840,2,Mod(1,1840)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1840, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1840.1");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1840 = 2^{4} \cdot 5 \cdot 23 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1840.a (trivial)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(14.6924739719\)
Analytic rank: \(0\)
Dimension: \(3\)
Coefficient field: 3.3.2597.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - x^{2} - 9x + 8 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 920)
Fricke sign: \(-1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\beta_2\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_1 q^{3} + q^{5} + (\beta_1 - 1) q^{7} + (\beta_{2} + 3) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_1 q^{3} + q^{5} + (\beta_1 - 1) q^{7} + (\beta_{2} + 3) q^{9} + ( - \beta_1 - 2) q^{11} - \beta_{2} q^{13} - \beta_1 q^{15} + (\beta_{2} + 3) q^{17} + (\beta_{2} + 4) q^{19} + ( - \beta_{2} + \beta_1 - 6) q^{21} - q^{23} + q^{25} + ( - \beta_{2} - 3 \beta_1 + 2) q^{27} + ( - \beta_{2} - \beta_1 + 5) q^{29} + ( - \beta_1 + 3) q^{31} + (\beta_{2} + 2 \beta_1 + 6) q^{33} + (\beta_1 - 1) q^{35} + ( - \beta_{2} - 3 \beta_1 + 3) q^{37} + (\beta_{2} + 3 \beta_1 - 2) q^{39} + ( - \beta_{2} + 3) q^{41} - 8 q^{43} + (\beta_{2} + 3) q^{45} - 2 \beta_{2} q^{47} + (\beta_{2} - 2 \beta_1) q^{49} + ( - \beta_{2} - 6 \beta_1 + 2) q^{51} + (\beta_{2} + 3 \beta_1 - 1) q^{53} + ( - \beta_1 - 2) q^{55} + ( - \beta_{2} - 7 \beta_1 + 2) q^{57} + (\beta_{2} + \beta_1 + 5) q^{59} + (2 \beta_{2} - \beta_1 + 4) q^{61} + (6 \beta_1 - 5) q^{63} - \beta_{2} q^{65} + (\beta_{2} + 3 \beta_1 - 3) q^{67} + \beta_1 q^{69} + ( - \beta_{2} + 2 \beta_1 + 7) q^{71} + ( - 2 \beta_{2} - 4 \beta_1 + 6) q^{73} - \beta_1 q^{75} + ( - \beta_{2} - \beta_1 - 4) q^{77} + 4 \beta_1 q^{79} + (\beta_{2} + \beta_1 + 7) q^{81} + ( - \beta_{2} + \beta_1 + 5) q^{83} + (\beta_{2} + 3) q^{85} + (2 \beta_{2} - 2 \beta_1 + 4) q^{87} + (4 \beta_1 - 4) q^{89} + ( - 3 \beta_1 + 2) q^{91} + (\beta_{2} - 3 \beta_1 + 6) q^{93} + (\beta_{2} + 4) q^{95} + (3 \beta_1 - 2) q^{97} + ( - 3 \beta_{2} - 6 \beta_1 - 4) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 3 q - q^{3} + 3 q^{5} - 2 q^{7} + 10 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 3 q - q^{3} + 3 q^{5} - 2 q^{7} + 10 q^{9} - 7 q^{11} - q^{13} - q^{15} + 10 q^{17} + 13 q^{19} - 18 q^{21} - 3 q^{23} + 3 q^{25} + 2 q^{27} + 13 q^{29} + 8 q^{31} + 21 q^{33} - 2 q^{35} + 5 q^{37} - 2 q^{39} + 8 q^{41} - 24 q^{43} + 10 q^{45} - 2 q^{47} - q^{49} - q^{51} + q^{53} - 7 q^{55} - 2 q^{57} + 17 q^{59} + 13 q^{61} - 9 q^{63} - q^{65} - 5 q^{67} + q^{69} + 22 q^{71} + 12 q^{73} - q^{75} - 14 q^{77} + 4 q^{79} + 23 q^{81} + 15 q^{83} + 10 q^{85} + 12 q^{87} - 8 q^{89} + 3 q^{91} + 16 q^{93} + 13 q^{95} - 3 q^{97} - 21 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{3} - x^{2} - 9x + 8 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 6 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 6 \) Copy content Toggle raw display

Embeddings

For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.

For more information on an embedded modular form you can click on its label.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
3.07912
0.878468
−2.95759
0 −3.07912 0 1.00000 0 2.07912 0 6.48097 0
1.2 0 −0.878468 0 1.00000 0 −0.121532 0 −2.22829 0
1.3 0 2.95759 0 1.00000 0 −3.95759 0 5.74732 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(5\) \( -1 \)
\(23\) \( +1 \)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1840.2.a.s 3
4.b odd 2 1 920.2.a.h 3
5.b even 2 1 9200.2.a.ce 3
8.b even 2 1 7360.2.a.cc 3
8.d odd 2 1 7360.2.a.by 3
12.b even 2 1 8280.2.a.bj 3
20.d odd 2 1 4600.2.a.x 3
20.e even 4 2 4600.2.e.p 6
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
920.2.a.h 3 4.b odd 2 1
1840.2.a.s 3 1.a even 1 1 trivial
4600.2.a.x 3 20.d odd 2 1
4600.2.e.p 6 20.e even 4 2
7360.2.a.by 3 8.d odd 2 1
7360.2.a.cc 3 8.b even 2 1
8280.2.a.bj 3 12.b even 2 1
9200.2.a.ce 3 5.b even 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(1840))\):

\( T_{3}^{3} + T_{3}^{2} - 9T_{3} - 8 \) Copy content Toggle raw display
\( T_{7}^{3} + 2T_{7}^{2} - 8T_{7} - 1 \) Copy content Toggle raw display
\( T_{11}^{3} + 7T_{11}^{2} + 7T_{11} - 14 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{3} \) Copy content Toggle raw display
$3$ \( T^{3} + T^{2} - 9T - 8 \) Copy content Toggle raw display
$5$ \( (T - 1)^{3} \) Copy content Toggle raw display
$7$ \( T^{3} + 2 T^{2} + \cdots - 1 \) Copy content Toggle raw display
$11$ \( T^{3} + 7 T^{2} + \cdots - 14 \) Copy content Toggle raw display
$13$ \( T^{3} + T^{2} + \cdots - 50 \) Copy content Toggle raw display
$17$ \( T^{3} - 10 T^{2} + \cdots + 83 \) Copy content Toggle raw display
$19$ \( T^{3} - 13 T^{2} + \cdots + 62 \) Copy content Toggle raw display
$23$ \( (T + 1)^{3} \) Copy content Toggle raw display
$29$ \( T^{3} - 13 T^{2} + \cdots + 76 \) Copy content Toggle raw display
$31$ \( T^{3} - 8 T^{2} + \cdots + 1 \) Copy content Toggle raw display
$37$ \( T^{3} - 5 T^{2} + \cdots + 496 \) Copy content Toggle raw display
$41$ \( T^{3} - 8 T^{2} + \cdots + 1 \) Copy content Toggle raw display
$43$ \( (T + 8)^{3} \) Copy content Toggle raw display
$47$ \( T^{3} + 2 T^{2} + \cdots - 400 \) Copy content Toggle raw display
$53$ \( T^{3} - T^{2} + \cdots - 300 \) Copy content Toggle raw display
$59$ \( T^{3} - 17 T^{2} + \cdots - 36 \) Copy content Toggle raw display
$61$ \( T^{3} - 13 T^{2} + \cdots + 720 \) Copy content Toggle raw display
$67$ \( T^{3} + 5 T^{2} + \cdots - 496 \) Copy content Toggle raw display
$71$ \( T^{3} - 22 T^{2} + \cdots + 225 \) Copy content Toggle raw display
$73$ \( T^{3} - 12 T^{2} + \cdots + 2120 \) Copy content Toggle raw display
$79$ \( T^{3} - 4 T^{2} + \cdots + 512 \) Copy content Toggle raw display
$83$ \( T^{3} - 15 T^{2} + \cdots + 36 \) Copy content Toggle raw display
$89$ \( T^{3} + 8 T^{2} + \cdots - 64 \) Copy content Toggle raw display
$97$ \( T^{3} + 3 T^{2} + \cdots + 50 \) Copy content Toggle raw display
show more
show less