Properties

Label 2808.1.dp.a
Level $2808$
Weight $1$
Character orbit 2808.dp
Analytic conductor $1.401$
Analytic rank $0$
Dimension $4$
Projective image $S_{4}$
CM/RM no
Inner twists $4$

Related objects

Downloads

Learn more

Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2808,1,Mod(73,2808)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2808, base_ring=CyclotomicField(12))
 
chi = DirichletCharacter(H, H._module([0, 0, 8, 3]))
 
N = Newforms(chi, 1, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2808.73");
 
S:= CuspForms(chi, 1);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2808 = 2^{3} \cdot 3^{3} \cdot 13 \)
Weight: \( k \) \(=\) \( 1 \)
Character orbit: \([\chi]\) \(=\) 2808.dp (of order \(12\), degree \(4\), not minimal)

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: no
Analytic conductor: \(1.40137455547\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(\zeta_{12})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{13}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 936)
Projective image: \(S_{4}\)
Projective field: Galois closure of 4.0.2847312.1

$q$-expansion

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

The \(q\)-expansion and trace form are shown below.

\(f(q)\) \(=\) \( q + ( - \zeta_{12}^{5} - \zeta_{12}^{2}) q^{5}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{12}^{5} - \zeta_{12}^{2}) q^{5} - \zeta_{12}^{2} q^{13} - \zeta_{12}^{3} q^{17} + \zeta_{12}^{5} q^{23} - \zeta_{12} q^{25} + ( - \zeta_{12}^{5} - \zeta_{12}^{2}) q^{31} + (\zeta_{12}^{3} - 1) q^{37} + ( - \zeta_{12}^{5} - \zeta_{12}^{2}) q^{41} + \zeta_{12} q^{43} + (\zeta_{12}^{4} + \zeta_{12}) q^{47} - \zeta_{12}^{5} q^{49} - q^{53} + (\zeta_{12}^{5} - \zeta_{12}^{2}) q^{59} + \zeta_{12}^{4} q^{61} + (\zeta_{12}^{4} - \zeta_{12}) q^{65} + ( - \zeta_{12}^{3} + 1) q^{73} - \zeta_{12}^{4} q^{79} + ( - \zeta_{12}^{4} + \zeta_{12}) q^{83} + (\zeta_{12}^{5} - \zeta_{12}^{2}) q^{85} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 2 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 2 q^{5} - 2 q^{13} - 2 q^{31} - 4 q^{37} - 2 q^{41} - 2 q^{47} - 4 q^{53} - 2 q^{59} - 2 q^{61} - 2 q^{65} + 4 q^{73} + 2 q^{79} + 2 q^{83} - 2 q^{85}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2808\mathbb{Z}\right)^\times\).

\(n\) \(703\) \(1081\) \(1405\) \(2081\)
\(\chi(n)\) \(1\) \(\zeta_{12}^{3}\) \(1\) \(-\zeta_{12}^{2}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
73.1
0.866025 + 0.500000i
0.866025 0.500000i
−0.866025 + 0.500000i
−0.866025 0.500000i
0 0 0 0.366025 1.36603i 0 0 0 0 0
577.1 0 0 0 0.366025 + 1.36603i 0 0 0 0 0
1009.1 0 0 0 −1.36603 + 0.366025i 0 0 0 0 0
2449.1 0 0 0 −1.36603 0.366025i 0 0 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
9.c even 3 1 inner
13.d odd 4 1 inner
117.y odd 12 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2808.1.dp.a 4
3.b odd 2 1 936.1.dm.b 4
9.c even 3 1 inner 2808.1.dp.a 4
9.d odd 6 1 936.1.dm.b 4
12.b even 2 1 1872.1.fi.a 4
13.d odd 4 1 inner 2808.1.dp.a 4
36.h even 6 1 1872.1.fi.a 4
39.f even 4 1 936.1.dm.b 4
117.y odd 12 1 inner 2808.1.dp.a 4
117.z even 12 1 936.1.dm.b 4
156.l odd 4 1 1872.1.fi.a 4
468.ch odd 12 1 1872.1.fi.a 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
936.1.dm.b 4 3.b odd 2 1
936.1.dm.b 4 9.d odd 6 1
936.1.dm.b 4 39.f even 4 1
936.1.dm.b 4 117.z even 12 1
1872.1.fi.a 4 12.b even 2 1
1872.1.fi.a 4 36.h even 6 1
1872.1.fi.a 4 156.l odd 4 1
1872.1.fi.a 4 468.ch odd 12 1
2808.1.dp.a 4 1.a even 1 1 trivial
2808.1.dp.a 4 9.c even 3 1 inner
2808.1.dp.a 4 13.d odd 4 1 inner
2808.1.dp.a 4 117.y odd 12 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} + 2T_{5}^{3} + 2T_{5}^{2} + 4T_{5} + 4 \) acting on \(S_{1}^{\mathrm{new}}(2808, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} + 2 T^{3} + 2 T^{2} + 4 T + 4 \) Copy content Toggle raw display
$7$ \( T^{4} \) Copy content Toggle raw display
$11$ \( T^{4} \) Copy content Toggle raw display
$13$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + 1)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} \) Copy content Toggle raw display
$23$ \( T^{4} - T^{2} + 1 \) Copy content Toggle raw display
$29$ \( T^{4} \) Copy content Toggle raw display
$31$ \( T^{4} + 2 T^{3} + 2 T^{2} + 4 T + 4 \) Copy content Toggle raw display
$37$ \( (T^{2} + 2 T + 2)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} + 2 T^{3} + 2 T^{2} + 4 T + 4 \) Copy content Toggle raw display
$43$ \( T^{4} - T^{2} + 1 \) Copy content Toggle raw display
$47$ \( T^{4} + 2 T^{3} + 2 T^{2} + 4 T + 4 \) Copy content Toggle raw display
$53$ \( (T + 1)^{4} \) Copy content Toggle raw display
$59$ \( T^{4} + 2 T^{3} + 2 T^{2} + 4 T + 4 \) Copy content Toggle raw display
$61$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} \) Copy content Toggle raw display
$71$ \( T^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} - 2 T + 2)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} - T + 1)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} - 2 T^{3} + 2 T^{2} - 4 T + 4 \) Copy content Toggle raw display
$89$ \( T^{4} \) Copy content Toggle raw display
$97$ \( T^{4} \) Copy content Toggle raw display
show more
show less