Properties

Label 896.2.ba.b
Level $896$
Weight $2$
Character orbit 896.ba
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(289,896)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(896, base_ring=CyclotomicField(12))
 
chi = DirichletCharacter(H, H._module([0, 9, 4]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("896.289");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 896 = 2^{7} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 896.ba (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: \(7.15459602111\)
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: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 112)
Sato-Tate group: $\mathrm{SU}(2)[C_{12}]$

$q$-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 primitive root of unity \(\zeta_{12}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \zeta_{12}^{3} + \zeta_{12}^{2} - 1) q^{3} + (\zeta_{12}^{3} - 2 \zeta_{12}^{2} + \cdots + 1) q^{5}+ \cdots + ( - \zeta_{12}^{2} - \zeta_{12} - 1) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \zeta_{12}^{3} + \zeta_{12}^{2} - 1) q^{3} + (\zeta_{12}^{3} - 2 \zeta_{12}^{2} + \cdots + 1) q^{5}+ \cdots + (5 \zeta_{12}^{3} + 2 \zeta_{12}^{2} + \cdots - 5) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 2 q^{3} - 6 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 2 q^{3} - 6 q^{9} + 10 q^{11} - 8 q^{13} + 12 q^{15} - 6 q^{17} - 10 q^{19} - 8 q^{21} + 12 q^{23} - 18 q^{25} - 2 q^{27} + 8 q^{29} - 4 q^{31} - 10 q^{33} + 18 q^{35} + 8 q^{37} + 6 q^{39} - 12 q^{43} - 6 q^{45} - 12 q^{47} - 4 q^{49} - 20 q^{53} + 26 q^{59} - 4 q^{61} - 10 q^{63} - 6 q^{65} + 6 q^{67} - 10 q^{69} + 18 q^{73} - 2 q^{75} - 28 q^{77} + 16 q^{79} - 4 q^{81} - 20 q^{83} - 6 q^{85} - 18 q^{87} - 18 q^{89} + 4 q^{91} + 2 q^{93} + 12 q^{95} + 16 q^{97} - 16 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Character values

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

\(n\) \(127\) \(129\) \(645\)
\(\chi(n)\) \(1\) \(-1 + \zeta_{12}^{2}\) \(\zeta_{12}^{3}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
289.1
−0.866025 0.500000i
0.866025 0.500000i
0.866025 + 0.500000i
−0.866025 + 0.500000i
0 −0.500000 + 1.86603i 0 −0.866025 3.23205i 0 −1.73205 + 2.00000i 0 −0.633975 0.366025i 0
417.1 0 −0.500000 + 0.133975i 0 0.866025 + 0.232051i 0 1.73205 + 2.00000i 0 −2.36603 + 1.36603i 0
737.1 0 −0.500000 0.133975i 0 0.866025 0.232051i 0 1.73205 2.00000i 0 −2.36603 1.36603i 0
865.1 0 −0.500000 1.86603i 0 −0.866025 + 3.23205i 0 −1.73205 2.00000i 0 −0.633975 + 0.366025i 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
112.w even 12 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 896.2.ba.b 4
4.b odd 2 1 896.2.ba.c 4
7.c even 3 1 896.2.ba.d 4
8.b even 2 1 112.2.w.b yes 4
8.d odd 2 1 448.2.ba.a 4
16.e even 4 1 112.2.w.a 4
16.e even 4 1 896.2.ba.d 4
16.f odd 4 1 448.2.ba.b 4
16.f odd 4 1 896.2.ba.a 4
28.g odd 6 1 896.2.ba.a 4
56.h odd 2 1 784.2.x.h 4
56.j odd 6 1 784.2.m.d 4
56.j odd 6 1 784.2.x.a 4
56.k odd 6 1 448.2.ba.b 4
56.p even 6 1 112.2.w.a 4
56.p even 6 1 784.2.m.e 4
112.l odd 4 1 784.2.x.a 4
112.u odd 12 1 448.2.ba.a 4
112.u odd 12 1 896.2.ba.c 4
112.w even 12 1 112.2.w.b yes 4
112.w even 12 1 784.2.m.e 4
112.w even 12 1 inner 896.2.ba.b 4
112.x odd 12 1 784.2.m.d 4
112.x odd 12 1 784.2.x.h 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
112.2.w.a 4 16.e even 4 1
112.2.w.a 4 56.p even 6 1
112.2.w.b yes 4 8.b even 2 1
112.2.w.b yes 4 112.w even 12 1
448.2.ba.a 4 8.d odd 2 1
448.2.ba.a 4 112.u odd 12 1
448.2.ba.b 4 16.f odd 4 1
448.2.ba.b 4 56.k odd 6 1
784.2.m.d 4 56.j odd 6 1
784.2.m.d 4 112.x odd 12 1
784.2.m.e 4 56.p even 6 1
784.2.m.e 4 112.w even 12 1
784.2.x.a 4 56.j odd 6 1
784.2.x.a 4 112.l odd 4 1
784.2.x.h 4 56.h odd 2 1
784.2.x.h 4 112.x odd 12 1
896.2.ba.a 4 16.f odd 4 1
896.2.ba.a 4 28.g odd 6 1
896.2.ba.b 4 1.a even 1 1 trivial
896.2.ba.b 4 112.w even 12 1 inner
896.2.ba.c 4 4.b odd 2 1
896.2.ba.c 4 112.u odd 12 1
896.2.ba.d 4 7.c even 3 1
896.2.ba.d 4 16.e even 4 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{4} + 2T_{3}^{3} + 5T_{3}^{2} + 4T_{3} + 1 \) acting on \(S_{2}^{\mathrm{new}}(896, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} + 2 T^{3} + \cdots + 1 \) Copy content Toggle raw display
$5$ \( T^{4} + 9 T^{2} + \cdots + 9 \) Copy content Toggle raw display
$7$ \( T^{4} + 2T^{2} + 49 \) Copy content Toggle raw display
$11$ \( T^{4} - 10 T^{3} + \cdots + 169 \) Copy content Toggle raw display
$13$ \( T^{4} + 8 T^{3} + \cdots + 4 \) Copy content Toggle raw display
$17$ \( T^{4} + 6 T^{3} + \cdots + 9 \) Copy content Toggle raw display
$19$ \( T^{4} + 10 T^{3} + \cdots + 169 \) Copy content Toggle raw display
$23$ \( T^{4} - 12 T^{3} + \cdots + 121 \) Copy content Toggle raw display
$29$ \( T^{4} - 8 T^{3} + \cdots + 4 \) Copy content Toggle raw display
$31$ \( T^{4} + 4 T^{3} + \cdots + 1 \) Copy content Toggle raw display
$37$ \( T^{4} - 8 T^{3} + \cdots + 169 \) Copy content Toggle raw display
$41$ \( T^{4} + 104T^{2} + 1936 \) Copy content Toggle raw display
$43$ \( T^{4} + 12 T^{3} + \cdots + 36 \) Copy content Toggle raw display
$47$ \( T^{4} + 12 T^{3} + \cdots + 1089 \) Copy content Toggle raw display
$53$ \( T^{4} + 20 T^{3} + \cdots + 2209 \) Copy content Toggle raw display
$59$ \( T^{4} - 26 T^{3} + \cdots + 14641 \) Copy content Toggle raw display
$61$ \( T^{4} + 4 T^{3} + \cdots + 1 \) Copy content Toggle raw display
$67$ \( T^{4} - 6 T^{3} + \cdots + 1521 \) Copy content Toggle raw display
$71$ \( T^{4} + 56T^{2} + 16 \) Copy content Toggle raw display
$73$ \( T^{4} - 18 T^{3} + \cdots + 529 \) Copy content Toggle raw display
$79$ \( T^{4} - 16 T^{3} + \cdots + 121 \) Copy content Toggle raw display
$83$ \( T^{4} + 20 T^{3} + \cdots + 676 \) Copy content Toggle raw display
$89$ \( (T^{2} + 9 T + 27)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} - 8 T - 32)^{2} \) Copy content Toggle raw display
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