Properties

Label 1008.4.k.c
Level $1008$
Weight $4$
Character orbit 1008.k
Analytic conductor $59.474$
Analytic rank $0$
Dimension $8$
CM 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] = [1008,4,Mod(881,1008)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1008, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 1, 1]))
 
N = Newforms(chi, 4, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1008.881");
 
S:= CuspForms(chi, 4);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1008 = 2^{4} \cdot 3^{2} \cdot 7 \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 1008.k (of order \(2\), degree \(1\), 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: \(59.4739252858\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.849346560000.6
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 50625 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{11}]\)
Coefficient ring index: \( 2^{9}\cdot 3^{5} \)
Twist minimal: no (minimal twist has level 126)
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_{3} q^{5} + (\beta_{5} + \beta_{4} - 5) q^{7}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{3} q^{5} + (\beta_{5} + \beta_{4} - 5) q^{7} + ( - 7 \beta_{2} + 5 \beta_1) q^{11} + (3 \beta_{6} - 2 \beta_{5} - \beta_{4}) q^{13} + (2 \beta_{7} - 7 \beta_{3}) q^{17} + ( - 4 \beta_{6} + 2 \beta_{5} + \beta_{4}) q^{19} + ( - 5 \beta_{2} - 7 \beta_1) q^{23} + ( - 10 \beta_{4} - 5) q^{25} + ( - 29 \beta_{2} - 10 \beta_1) q^{29} + (2 \beta_{6} + 4 \beta_{5} + 2 \beta_{4}) q^{31} + ( - \beta_{7} + 8 \beta_{3} + \cdots + 10 \beta_1) q^{35}+ \cdots + (31 \beta_{6} + 42 \beta_{5} + 21 \beta_{4}) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 40 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 40 q^{7} - 40 q^{25} - 160 q^{37} - 1040 q^{43} - 2056 q^{49} + 3680 q^{67} - 448 q^{79} + 6720 q^{85} + 1920 q^{91}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 50625 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( 2\nu^{4} ) / 75 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{6} + 225\nu^{2} ) / 1125 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -2\nu^{5} + 30\nu^{3} ) / 225 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -2\nu^{6} + 450\nu^{2} ) / 1125 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{7} + 3\nu^{6} + 45\nu^{5} + 675\nu^{3} - 675\nu^{2} - 3375\nu ) / 3375 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -4\nu^{7} - 13500\nu ) / 3375 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -2\nu^{7} + 6750\nu ) / 1125 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( 2\beta_{7} - 3\beta_{6} ) / 24 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( 5\beta_{4} + 10\beta_{2} ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -5\beta_{6} + 20\beta_{5} + 10\beta_{4} + 30\beta_{3} ) / 8 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 75\beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -75\beta_{6} + 300\beta_{5} + 150\beta_{4} - 450\beta_{3} ) / 8 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -1125\beta_{4} + 2250\beta_{2} ) / 4 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -2250\beta_{7} - 3375\beta_{6} ) / 8 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1008\mathbb{Z}\right)^\times\).

\(n\) \(127\) \(577\) \(757\) \(785\)
\(\chi(n)\) \(1\) \(-1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
881.1
−1.48213 + 3.57817i
−1.48213 3.57817i
3.57817 1.48213i
3.57817 + 1.48213i
−3.57817 1.48213i
−3.57817 + 1.48213i
1.48213 + 3.57817i
1.48213 3.57817i
0 0 0 −14.3127 0 −9.24264 16.0491i 0 0 0
881.2 0 0 0 −14.3127 0 −9.24264 + 16.0491i 0 0 0
881.3 0 0 0 −5.92851 0 −0.757359 18.5048i 0 0 0
881.4 0 0 0 −5.92851 0 −0.757359 + 18.5048i 0 0 0
881.5 0 0 0 5.92851 0 −0.757359 18.5048i 0 0 0
881.6 0 0 0 5.92851 0 −0.757359 + 18.5048i 0 0 0
881.7 0 0 0 14.3127 0 −9.24264 16.0491i 0 0 0
881.8 0 0 0 14.3127 0 −9.24264 + 16.0491i 0 0 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 881.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
7.b odd 2 1 inner
21.c even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1008.4.k.c 8
3.b odd 2 1 inner 1008.4.k.c 8
4.b odd 2 1 126.4.d.a 8
7.b odd 2 1 inner 1008.4.k.c 8
12.b even 2 1 126.4.d.a 8
21.c even 2 1 inner 1008.4.k.c 8
28.d even 2 1 126.4.d.a 8
28.f even 6 2 882.4.k.c 16
28.g odd 6 2 882.4.k.c 16
84.h odd 2 1 126.4.d.a 8
84.j odd 6 2 882.4.k.c 16
84.n even 6 2 882.4.k.c 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
126.4.d.a 8 4.b odd 2 1
126.4.d.a 8 12.b even 2 1
126.4.d.a 8 28.d even 2 1
126.4.d.a 8 84.h odd 2 1
882.4.k.c 16 28.f even 6 2
882.4.k.c 16 28.g odd 6 2
882.4.k.c 16 84.j odd 6 2
882.4.k.c 16 84.n even 6 2
1008.4.k.c 8 1.a even 1 1 trivial
1008.4.k.c 8 3.b odd 2 1 inner
1008.4.k.c 8 7.b odd 2 1 inner
1008.4.k.c 8 21.c even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} - 240T_{5}^{2} + 7200 \) acting on \(S_{4}^{\mathrm{new}}(1008, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} - 240 T^{2} + 7200)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} + 20 T^{3} + \cdots + 117649)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 3564 T^{2} + 324)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 8160 T^{2} + 15235200)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} - 20400 T^{2} + 36295200)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} + 13920 T^{2} + 48412800)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} + 4428 T^{2} + 1726596)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} + 37476 T^{2} + 133125444)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} + 17280 T^{2} + 37324800)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} + 40 T - 92912)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} - 89520 T^{2} + 1999648800)^{2} \) Copy content Toggle raw display
$43$ \( (T^{2} + 260 T - 3908)^{4} \) Copy content Toggle raw display
$47$ \( (T^{4} - 265920 T^{2} + 15516172800)^{2} \) Copy content Toggle raw display
$53$ \( (T^{4} + 73188 T^{2} + 1318125636)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} - 568320 T^{2} + 15600844800)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 407040 T^{2} + 2130739200)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} - 920 T - 141200)^{4} \) Copy content Toggle raw display
$71$ \( (T^{4} + 1100844 T^{2} + 913369284)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} + 255840 T^{2} + 5399683200)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} + 112 T - 580064)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} - 945600 T^{2} + 205927948800)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} - 1721520 T^{2} + 168544800)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} + 2605920 T^{2} + 409114396800)^{2} \) Copy content Toggle raw display
show more
show less