Properties

Label 1456.2.v.a
Level $1456$
Weight $2$
Character orbit 1456.v
Analytic conductor $11.626$
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] = [1456,2,Mod(239,1456)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1456, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([2, 0, 0, 3]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1456.239");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1456 = 2^{4} \cdot 7 \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1456.v (of order \(4\), degree \(2\), 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: \(11.6262185343\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(i)\)
Coefficient field: \(\Q(\zeta_{24})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{4} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{4}]$

$q$-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.

\(f(q)\) \(=\) \( q + ( - \beta_{5} - \beta_{4} + \beta_1) q^{3} + (\beta_{3} + 1) q^{5} + \beta_1 q^{7} + ( - 2 \beta_{7} + 2 \beta_{2} - 2) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_{5} - \beta_{4} + \beta_1) q^{3} + (\beta_{3} + 1) q^{5} + \beta_1 q^{7} + ( - 2 \beta_{7} + 2 \beta_{2} - 2) q^{9} + ( - 2 \beta_{6} - 2 \beta_{4} + \beta_1) q^{11} + ( - 3 \beta_{3} - 2) q^{13} + (\beta_{6} - 2 \beta_{5} - \beta_{4}) q^{15} + ( - 3 \beta_{7} - 3 \beta_{2}) q^{17} + ( - \beta_{6} + \beta_{4}) q^{19} + ( - \beta_{7} + \beta_{3} - 1) q^{21} + (\beta_{6} - 3 \beta_{5} - 3 \beta_1) q^{23} - 3 \beta_{3} q^{25} + (5 \beta_{5} + 3 \beta_{4} - 5 \beta_1) q^{27} + ( - 2 \beta_{7} + 2 \beta_{2} + 4) q^{29} + (2 \beta_{6} + 5 \beta_{5} - 2 \beta_{4}) q^{31} + ( - 5 \beta_{7} + 7 \beta_{3} - 7) q^{33} + ( - \beta_{5} + \beta_1) q^{35} + (\beta_{7} + 3 \beta_{3} - 3) q^{37} + ( - 3 \beta_{6} + 5 \beta_{5} + \cdots + \beta_1) q^{39}+ \cdots + (6 \beta_{6} + 6 \beta_{4} - 26 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{5} - 16 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{5} - 16 q^{9} - 16 q^{13} - 8 q^{21} + 32 q^{29} - 56 q^{33} - 24 q^{37} + 40 q^{41} - 16 q^{45} - 48 q^{53} + 24 q^{57} + 8 q^{61} + 8 q^{65} + 72 q^{73} + 104 q^{81} - 16 q^{89} - 8 q^{93} - 24 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( \zeta_{24}^{3} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \zeta_{24}^{5} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \zeta_{24}^{6} \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( 2\zeta_{24}^{4} - 1 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( -\zeta_{24}^{5} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( -\zeta_{24}^{6} + 2\zeta_{24}^{2} \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( 2\zeta_{24}^{7} - \zeta_{24}^{3} \) Copy content Toggle raw display
\(\zeta_{24}\)\(=\) \( ( \beta_{5} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{2}\)\(=\) \( ( \beta_{6} + \beta_{3} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{3}\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\zeta_{24}^{4}\)\(=\) \( ( \beta_{4} + 1 ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{5}\)\(=\) \( ( -\beta_{5} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{6}\)\(=\) \( \beta_{3} \) Copy content Toggle raw display
\(\zeta_{24}^{7}\)\(=\) \( ( \beta_{7} + \beta_1 ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1456\mathbb{Z}\right)^\times\).

\(n\) \(561\) \(911\) \(1093\) \(1249\)
\(\chi(n)\) \(\beta_{3}\) \(-1\) \(1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
239.1
−0.258819 + 0.965926i
0.258819 0.965926i
0.965926 0.258819i
−0.965926 + 0.258819i
−0.965926 0.258819i
0.965926 + 0.258819i
0.258819 + 0.965926i
−0.258819 0.965926i
0 3.14626i 0 1.00000 1.00000i 0 0.707107 0.707107i 0 −6.89898 0
239.2 0 0.317837i 0 1.00000 1.00000i 0 −0.707107 + 0.707107i 0 2.89898 0
239.3 0 0.317837i 0 1.00000 1.00000i 0 0.707107 0.707107i 0 2.89898 0
239.4 0 3.14626i 0 1.00000 1.00000i 0 −0.707107 + 0.707107i 0 −6.89898 0
463.1 0 3.14626i 0 1.00000 + 1.00000i 0 −0.707107 0.707107i 0 −6.89898 0
463.2 0 0.317837i 0 1.00000 + 1.00000i 0 0.707107 + 0.707107i 0 2.89898 0
463.3 0 0.317837i 0 1.00000 + 1.00000i 0 −0.707107 0.707107i 0 2.89898 0
463.4 0 3.14626i 0 1.00000 + 1.00000i 0 0.707107 + 0.707107i 0 −6.89898 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 239.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
13.d odd 4 1 inner
52.f even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1456.2.v.a 8
4.b odd 2 1 inner 1456.2.v.a 8
13.d odd 4 1 inner 1456.2.v.a 8
52.f even 4 1 inner 1456.2.v.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1456.2.v.a 8 1.a even 1 1 trivial
1456.2.v.a 8 4.b odd 2 1 inner
1456.2.v.a 8 13.d odd 4 1 inner
1456.2.v.a 8 52.f even 4 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{4} + 10T_{3}^{2} + 1 \) acting on \(S_{2}^{\mathrm{new}}(1456, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{4} + 10 T^{2} + 1)^{2} \) Copy content Toggle raw display
$5$ \( (T^{2} - 2 T + 2)^{4} \) Copy content Toggle raw display
$7$ \( (T^{4} + 1)^{2} \) Copy content Toggle raw display
$11$ \( T^{8} + 1442 T^{4} + 279841 \) Copy content Toggle raw display
$13$ \( (T^{2} + 4 T + 13)^{4} \) Copy content Toggle raw display
$17$ \( (T^{2} + 54)^{4} \) Copy content Toggle raw display
$19$ \( (T^{4} + 36)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 42 T^{2} + 225)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} - 8 T - 8)^{4} \) Copy content Toggle raw display
$31$ \( T^{8} + 9602T^{4} + 1 \) Copy content Toggle raw display
$37$ \( (T^{4} + 12 T^{3} + \cdots + 225)^{2} \) Copy content Toggle raw display
$41$ \( (T^{4} - 20 T^{3} + \cdots + 2209)^{2} \) Copy content Toggle raw display
$43$ \( (T^{2} - 48)^{4} \) Copy content Toggle raw display
$47$ \( (T^{4} + 81)^{2} \) Copy content Toggle raw display
$53$ \( (T^{2} + 12 T - 18)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} + 1296)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} - 2 T - 23)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 625)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} + 256)^{2} \) Copy content Toggle raw display
$73$ \( (T^{4} - 36 T^{3} + \cdots + 25281)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} + 202 T^{2} + 9025)^{2} \) Copy content Toggle raw display
$83$ \( T^{8} + 1736 T^{4} + 10000 \) Copy content Toggle raw display
$89$ \( (T^{2} + 4 T + 8)^{4} \) Copy content Toggle raw display
$97$ \( (T^{4} + 12 T^{3} + \cdots + 3249)^{2} \) Copy content Toggle raw display
show more
show less