Properties

Label 896.2.e.b
Level $896$
Weight $2$
Character orbit 896.e
Analytic conductor $7.155$
Analytic rank $0$
Dimension $4$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [896,2,Mod(447,896)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(896, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([1, 1, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("896.447");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 896 = 2^{7} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 896.e (of order \(2\), degree \(1\), 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: \(7.15459602111\)
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: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: yes
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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \beta_{2} + \beta_1) q^{3} + ( - \beta_{3} - 1) q^{5} + ( - \beta_{2} + 2) q^{7} + (2 \beta_{3} - 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_{2} + \beta_1) q^{3} + ( - \beta_{3} - 1) q^{5} + ( - \beta_{2} + 2) q^{7} + (2 \beta_{3} - 1) q^{9} + (2 \beta_{3} - 2) q^{11} + (\beta_{3} - 3) q^{13} + 2 \beta_1 q^{15} - 4 \beta_1 q^{17} + (\beta_{2} + 3 \beta_1) q^{19} + (\beta_{3} - 2 \beta_{2} + 2 \beta_1 - 3) q^{21} + ( - 2 \beta_{2} + 2 \beta_1) q^{23} + (2 \beta_{3} - 1) q^{25} - 4 \beta_1 q^{27} - 4 \beta_{2} q^{29} - 4 \beta_{3} q^{31} + (4 \beta_{2} - 8 \beta_1) q^{33} + ( - 2 \beta_{3} + \beta_{2} + 3 \beta_1 - 2) q^{35} - 4 \beta_1 q^{37} + (4 \beta_{2} - 6 \beta_1) q^{39} + ( - 4 \beta_{2} - 4 \beta_1) q^{41} + (2 \beta_{3} + 6) q^{43} + ( - \beta_{3} - 5) q^{45} + 4 \beta_{3} q^{47} + ( - 4 \beta_{2} + 1) q^{49} + ( - 4 \beta_{3} + 4) q^{51} - 4 \beta_{2} q^{53} - 4 q^{55} + 2 \beta_{3} q^{57} + ( - 3 \beta_{2} - 9 \beta_1) q^{59} + ( - 5 \beta_{3} + 3) q^{61} + (4 \beta_{3} + \beta_{2} - 6 \beta_1 - 2) q^{63} + 2 \beta_{3} q^{65} + ( - 2 \beta_{3} - 6) q^{67} + (4 \beta_{3} - 8) q^{69} + (2 \beta_{2} + 8 \beta_1) q^{71} + 4 \beta_{2} q^{73} + (3 \beta_{2} - 7 \beta_1) q^{75} + (4 \beta_{3} + 2 \beta_{2} - 6 \beta_1 - 4) q^{77} + 2 \beta_{2} q^{79} + (2 \beta_{3} + 1) q^{81} + ( - \beta_{2} + 9 \beta_1) q^{83} + (4 \beta_{2} + 4 \beta_1) q^{85} + (4 \beta_{3} - 12) q^{87} + (4 \beta_{2} - 8 \beta_1) q^{89} + (2 \beta_{3} + 3 \beta_{2} - 3 \beta_1 - 6) q^{91} + ( - 4 \beta_{2} + 12 \beta_1) q^{93} + ( - 4 \beta_{2} - 6 \beta_1) q^{95} + 12 \beta_1 q^{97} + ( - 6 \beta_{3} + 14) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 4 q^{5} + 8 q^{7} - 4 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 4 q^{5} + 8 q^{7} - 4 q^{9} - 8 q^{11} - 12 q^{13} - 12 q^{21} - 4 q^{25} - 8 q^{35} + 24 q^{43} - 20 q^{45} + 4 q^{49} + 16 q^{51} - 16 q^{55} + 12 q^{61} - 8 q^{63} - 24 q^{67} - 32 q^{69} - 16 q^{77} + 4 q^{81} - 48 q^{87} - 24 q^{91} + 56 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( \zeta_{12}^{3} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( 2\zeta_{12}^{2} - 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( -\zeta_{12}^{3} + 2\zeta_{12} \) Copy content Toggle raw display
\(\zeta_{12}\)\(=\) \( ( \beta_{3} + \beta_1 ) / 2 \) Copy content Toggle raw display
\(\zeta_{12}^{2}\)\(=\) \( ( \beta_{2} + 1 ) / 2 \) Copy content Toggle raw display
\(\zeta_{12}^{3}\)\(=\) \( \beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/896\mathbb{Z}\right)^\times\).

\(n\) \(127\) \(129\) \(645\)
\(\chi(n)\) \(-1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
447.1
−0.866025 0.500000i
0.866025 + 0.500000i
0.866025 0.500000i
−0.866025 + 0.500000i
0 2.73205i 0 0.732051 0 2.00000 1.73205i 0 −4.46410 0
447.2 0 0.732051i 0 −2.73205 0 2.00000 1.73205i 0 2.46410 0
447.3 0 0.732051i 0 −2.73205 0 2.00000 + 1.73205i 0 2.46410 0
447.4 0 2.73205i 0 0.732051 0 2.00000 + 1.73205i 0 −4.46410 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
56.e even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 896.2.e.b yes 4
4.b odd 2 1 896.2.e.a 4
7.b odd 2 1 896.2.e.e yes 4
8.b even 2 1 896.2.e.f yes 4
8.d odd 2 1 896.2.e.e yes 4
16.e even 4 1 1792.2.f.a 4
16.e even 4 1 1792.2.f.h 4
16.f odd 4 1 1792.2.f.b 4
16.f odd 4 1 1792.2.f.i 4
28.d even 2 1 896.2.e.f yes 4
56.e even 2 1 inner 896.2.e.b yes 4
56.h odd 2 1 896.2.e.a 4
112.j even 4 1 1792.2.f.a 4
112.j even 4 1 1792.2.f.h 4
112.l odd 4 1 1792.2.f.b 4
112.l odd 4 1 1792.2.f.i 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
896.2.e.a 4 4.b odd 2 1
896.2.e.a 4 56.h odd 2 1
896.2.e.b yes 4 1.a even 1 1 trivial
896.2.e.b yes 4 56.e even 2 1 inner
896.2.e.e yes 4 7.b odd 2 1
896.2.e.e yes 4 8.d odd 2 1
896.2.e.f yes 4 8.b even 2 1
896.2.e.f yes 4 28.d even 2 1
1792.2.f.a 4 16.e even 4 1
1792.2.f.a 4 112.j even 4 1
1792.2.f.b 4 16.f odd 4 1
1792.2.f.b 4 112.l odd 4 1
1792.2.f.h 4 16.e even 4 1
1792.2.f.h 4 112.j even 4 1
1792.2.f.i 4 16.f odd 4 1
1792.2.f.i 4 112.l odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(896, [\chi])\):

\( T_{3}^{4} + 8T_{3}^{2} + 4 \) Copy content Toggle raw display
\( T_{5}^{2} + 2T_{5} - 2 \) Copy content Toggle raw display
\( T_{11}^{2} + 4T_{11} - 8 \) Copy content Toggle raw display
\( T_{31}^{2} - 48 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} + 8T^{2} + 4 \) Copy content Toggle raw display
$5$ \( (T^{2} + 2 T - 2)^{2} \) Copy content Toggle raw display
$7$ \( (T^{2} - 4 T + 7)^{2} \) Copy content Toggle raw display
$11$ \( (T^{2} + 4 T - 8)^{2} \) Copy content Toggle raw display
$13$ \( (T^{2} + 6 T + 6)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + 16)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} + 24T^{2} + 36 \) Copy content Toggle raw display
$23$ \( T^{4} + 32T^{2} + 64 \) Copy content Toggle raw display
$29$ \( (T^{2} + 48)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} - 48)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} + 16)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} + 128T^{2} + 1024 \) Copy content Toggle raw display
$43$ \( (T^{2} - 12 T + 24)^{2} \) Copy content Toggle raw display
$47$ \( (T^{2} - 48)^{2} \) Copy content Toggle raw display
$53$ \( (T^{2} + 48)^{2} \) Copy content Toggle raw display
$59$ \( T^{4} + 216T^{2} + 2916 \) Copy content Toggle raw display
$61$ \( (T^{2} - 6 T - 66)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 12 T + 24)^{2} \) Copy content Toggle raw display
$71$ \( T^{4} + 152T^{2} + 2704 \) Copy content Toggle raw display
$73$ \( (T^{2} + 48)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} + 12)^{2} \) Copy content Toggle raw display
$83$ \( T^{4} + 168T^{2} + 6084 \) Copy content Toggle raw display
$89$ \( T^{4} + 224T^{2} + 256 \) Copy content Toggle raw display
$97$ \( (T^{2} + 144)^{2} \) Copy content Toggle raw display
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