Properties

Label 980.2.k.h
Level $980$
Weight $2$
Character orbit 980.k
Analytic conductor $7.825$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $8$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [980,2,Mod(687,980)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(980, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([2, 1, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("980.687");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 980 = 2^{2} \cdot 5 \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 980.k (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: \(7.82533939809\)
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: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{2} \)
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.

\(f(q)\) \(=\) \( q + ( - \beta_{6} + \beta_{3}) q^{2} + ( - \beta_{7} - \beta_{4}) q^{3} + ( - \beta_{6} - \beta_{2}) q^{4} + ( - 2 \beta_{5} + \beta_1) q^{5} + (2 \beta_{5} - \beta_{4} + 2 \beta_1) q^{6} + ( - 2 \beta_{3} + 2) q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_{6} + \beta_{3}) q^{2} + ( - \beta_{7} - \beta_{4}) q^{3} + ( - \beta_{6} - \beta_{2}) q^{4} + ( - 2 \beta_{5} + \beta_1) q^{5} + (2 \beta_{5} - \beta_{4} + 2 \beta_1) q^{6} + ( - 2 \beta_{3} + 2) q^{8} + ( - \beta_{7} - \beta_{5} - 2 \beta_{4}) q^{10} + (\beta_{6} - \beta_{2} + 1) q^{11} + ( - \beta_{7} - \beta_{5} + \cdots + 2 \beta_1) q^{12}+ \cdots - 3 \beta_1 q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 4 q^{2} + 16 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 4 q^{2} + 16 q^{8} + 16 q^{16} + 12 q^{22} - 32 q^{25} - 12 q^{30} - 16 q^{32} + 8 q^{37} + 72 q^{46} - 4 q^{50} - 64 q^{53} - 24 q^{57} + 4 q^{58} - 48 q^{60} - 8 q^{65} - 12 q^{78} + 72 q^{81} - 112 q^{85} - 120 q^{86} + 72 q^{92} + 48 q^{93}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

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

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/980\mathbb{Z}\right)^\times\).

\(n\) \(101\) \(197\) \(491\)
\(\chi(n)\) \(1\) \(\beta_{3}\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
687.1
0.965926 + 0.258819i
−0.965926 0.258819i
0.258819 + 0.965926i
−0.258819 0.965926i
0.965926 0.258819i
−0.965926 + 0.258819i
0.258819 0.965926i
−0.258819 + 0.965926i
−0.366025 + 1.36603i −1.22474 1.22474i −1.73205 1.00000i −0.707107 + 2.12132i 2.12132 1.22474i 0 2.00000 2.00000i 0 −2.63896 1.74238i
687.2 −0.366025 + 1.36603i 1.22474 + 1.22474i −1.73205 1.00000i 0.707107 2.12132i −2.12132 + 1.22474i 0 2.00000 2.00000i 0 2.63896 + 1.74238i
687.3 1.36603 0.366025i −1.22474 1.22474i 1.73205 1.00000i 0.707107 2.12132i −2.12132 1.22474i 0 2.00000 2.00000i 0 0.189469 3.15660i
687.4 1.36603 0.366025i 1.22474 + 1.22474i 1.73205 1.00000i −0.707107 + 2.12132i 2.12132 + 1.22474i 0 2.00000 2.00000i 0 −0.189469 + 3.15660i
883.1 −0.366025 1.36603i −1.22474 + 1.22474i −1.73205 + 1.00000i −0.707107 2.12132i 2.12132 + 1.22474i 0 2.00000 + 2.00000i 0 −2.63896 + 1.74238i
883.2 −0.366025 1.36603i 1.22474 1.22474i −1.73205 + 1.00000i 0.707107 + 2.12132i −2.12132 1.22474i 0 2.00000 + 2.00000i 0 2.63896 1.74238i
883.3 1.36603 + 0.366025i −1.22474 + 1.22474i 1.73205 + 1.00000i 0.707107 + 2.12132i −2.12132 + 1.22474i 0 2.00000 + 2.00000i 0 0.189469 + 3.15660i
883.4 1.36603 + 0.366025i 1.22474 1.22474i 1.73205 + 1.00000i −0.707107 2.12132i 2.12132 1.22474i 0 2.00000 + 2.00000i 0 −0.189469 3.15660i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 687.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
5.c odd 4 1 inner
7.b odd 2 1 inner
20.e even 4 1 inner
28.d even 2 1 inner
35.f even 4 1 inner
140.j odd 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 980.2.k.h 8
4.b odd 2 1 inner 980.2.k.h 8
5.c odd 4 1 inner 980.2.k.h 8
7.b odd 2 1 inner 980.2.k.h 8
7.c even 3 1 980.2.x.e 8
7.c even 3 1 980.2.x.i 8
7.d odd 6 1 980.2.x.e 8
7.d odd 6 1 980.2.x.i 8
20.e even 4 1 inner 980.2.k.h 8
28.d even 2 1 inner 980.2.k.h 8
28.f even 6 1 980.2.x.e 8
28.f even 6 1 980.2.x.i 8
28.g odd 6 1 980.2.x.e 8
28.g odd 6 1 980.2.x.i 8
35.f even 4 1 inner 980.2.k.h 8
35.k even 12 1 980.2.x.e 8
35.k even 12 1 980.2.x.i 8
35.l odd 12 1 980.2.x.e 8
35.l odd 12 1 980.2.x.i 8
140.j odd 4 1 inner 980.2.k.h 8
140.w even 12 1 980.2.x.e 8
140.w even 12 1 980.2.x.i 8
140.x odd 12 1 980.2.x.e 8
140.x odd 12 1 980.2.x.i 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
980.2.k.h 8 1.a even 1 1 trivial
980.2.k.h 8 4.b odd 2 1 inner
980.2.k.h 8 5.c odd 4 1 inner
980.2.k.h 8 7.b odd 2 1 inner
980.2.k.h 8 20.e even 4 1 inner
980.2.k.h 8 28.d even 2 1 inner
980.2.k.h 8 35.f even 4 1 inner
980.2.k.h 8 140.j odd 4 1 inner
980.2.x.e 8 7.c even 3 1
980.2.x.e 8 7.d odd 6 1
980.2.x.e 8 28.f even 6 1
980.2.x.e 8 28.g odd 6 1
980.2.x.e 8 35.k even 12 1
980.2.x.e 8 35.l odd 12 1
980.2.x.e 8 140.w even 12 1
980.2.x.e 8 140.x odd 12 1
980.2.x.i 8 7.c even 3 1
980.2.x.i 8 7.d odd 6 1
980.2.x.i 8 28.f even 6 1
980.2.x.i 8 28.g odd 6 1
980.2.x.i 8 35.k even 12 1
980.2.x.i 8 35.l odd 12 1
980.2.x.i 8 140.w even 12 1
980.2.x.i 8 140.x odd 12 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(980, [\chi])\):

\( T_{3}^{4} + 9 \) Copy content Toggle raw display
\( T_{13}^{4} + 1 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - 2 T^{3} + 2 T^{2} + \cdots + 4)^{2} \) Copy content Toggle raw display
$3$ \( (T^{4} + 9)^{2} \) Copy content Toggle raw display
$5$ \( (T^{4} + 8 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{2} + 3)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} + 1)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} + 2401)^{2} \) Copy content Toggle raw display
$19$ \( (T^{2} - 6)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} + 2916)^{2} \) Copy content Toggle raw display
$29$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$31$ \( (T^{2} + 24)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} - 2 T + 2)^{4} \) Copy content Toggle raw display
$41$ \( (T^{2} - 72)^{4} \) Copy content Toggle raw display
$43$ \( (T^{4} + 22500)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} + 9)^{2} \) Copy content Toggle raw display
$53$ \( (T^{2} + 16 T + 128)^{4} \) Copy content Toggle raw display
$59$ \( (T^{2} - 96)^{4} \) Copy content Toggle raw display
$61$ \( (T^{2} - 8)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 9216)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} + 48)^{4} \) Copy content Toggle raw display
$73$ \( (T^{4} + 256)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} - 27)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} + 36864)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} + 72)^{4} \) Copy content Toggle raw display
$97$ \( (T^{4} + 81)^{2} \) Copy content Toggle raw display
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