Properties

Label 980.2.q.i
Level $980$
Weight $2$
Character orbit 980.q
Analytic conductor $7.825$
Analytic rank $0$
Dimension $8$
CM discriminant -35
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [980,2,Mod(569,980)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(980, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 3, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("980.569");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 980 = 2^{2} \cdot 5 \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 980.q (of order \(6\), degree \(2\), 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: \(7.82533939809\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.31116960000.2
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + x^{6} - 8x^{4} + 9x^{2} + 81 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 3^{2} \)
Twist minimal: yes
Sato-Tate group: $\mathrm{U}(1)[D_{6}]$

$q$-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.

\(f(q)\) \(=\) \( q + ( - \beta_{7} + \beta_{2}) q^{3} + ( - \beta_{7} - \beta_{3}) q^{5} + ( - \beta_{5} + 4 \beta_1 + 4) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + ( - \beta_{7} + \beta_{2}) q^{3} + ( - \beta_{7} - \beta_{3}) q^{5} + ( - \beta_{5} + 4 \beta_1 + 4) q^{9} + (\beta_{5} + \beta_{4} + \beta_1) q^{11} + (\beta_{6} + 2 \beta_{3}) q^{13} + (\beta_{4} + 3) q^{15} + (\beta_{7} - 3 \beta_{2}) q^{17} - 5 \beta_1 q^{25} + ( - 3 \beta_{6} + 4 \beta_{3}) q^{27} + ( - \beta_{4} - 5) q^{29} + ( - 5 \beta_{7} + \beta_{6} + \cdots + \beta_{2}) q^{33}+ \cdots + (2 \beta_{4} + 22) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 14 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 14 q^{9} - 6 q^{11} + 20 q^{15} + 20 q^{25} - 36 q^{29} + 6 q^{39} - 58 q^{51} + 30 q^{65} - 96 q^{71} + 2 q^{79} - 76 q^{81} + 20 q^{85} + 168 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + x^{6} - 8x^{4} + 9x^{2} + 81 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -\nu^{6} + 8\nu^{4} + 8\nu^{2} - 81 ) / 72 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{7} + 8\nu^{5} - 64\nu^{3} - 297\nu ) / 216 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -\nu^{7} + 8\nu^{5} + 44\nu^{3} - 81\nu ) / 108 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{6} + \nu^{4} - 17\nu^{2} ) / 9 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{6} + 8\nu^{2} + 17 ) / 8 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{7} + \nu^{5} - 8\nu^{3} + 36\nu ) / 27 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 11\nu^{7} - 16\nu^{5} - 88\nu^{3} + 99\nu ) / 216 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( -\beta_{7} + \beta_{6} - \beta_{3} - \beta_{2} ) / 3 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{5} - \beta_{4} + \beta _1 - 1 ) / 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 2\beta_{7} - 2\beta_{6} + 5\beta_{3} - 4\beta_{2} ) / 3 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( \beta_{5} + 2\beta_{4} + 25\beta _1 + 26 ) / 3 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -13\beta_{7} + 22\beta_{6} + 11\beta_{3} + 11\beta_{2} ) / 3 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( 16\beta_{5} + 8\beta_{4} - 8\beta _1 - 43 ) / 3 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 65\beta_{7} + 7\beta_{6} + 65\beta_{3} - 7\beta_{2} ) / 3 \) Copy content Toggle raw display

Character values

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

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

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
569.1
−0.306808 1.70466i
1.62968 0.586627i
−1.62968 + 0.586627i
0.306808 + 1.70466i
−0.306808 + 1.70466i
1.62968 + 0.586627i
−1.62968 0.586627i
0.306808 1.70466i
0 −2.95256 + 1.70466i 0 −1.93649 1.11803i 0 0 0 4.31174 7.46815i 0
569.2 0 −1.01607 + 0.586627i 0 1.93649 + 1.11803i 0 0 0 −0.811738 + 1.40597i 0
569.3 0 1.01607 0.586627i 0 −1.93649 1.11803i 0 0 0 −0.811738 + 1.40597i 0
569.4 0 2.95256 1.70466i 0 1.93649 + 1.11803i 0 0 0 4.31174 7.46815i 0
949.1 0 −2.95256 1.70466i 0 −1.93649 + 1.11803i 0 0 0 4.31174 + 7.46815i 0
949.2 0 −1.01607 0.586627i 0 1.93649 1.11803i 0 0 0 −0.811738 1.40597i 0
949.3 0 1.01607 + 0.586627i 0 −1.93649 + 1.11803i 0 0 0 −0.811738 1.40597i 0
949.4 0 2.95256 + 1.70466i 0 1.93649 1.11803i 0 0 0 4.31174 + 7.46815i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 569.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
35.c odd 2 1 CM by \(\Q(\sqrt{-35}) \)
5.b even 2 1 inner
7.b odd 2 1 inner
7.c even 3 1 inner
7.d odd 6 1 inner
35.i odd 6 1 inner
35.j even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 980.2.q.i 8
5.b even 2 1 inner 980.2.q.i 8
7.b odd 2 1 inner 980.2.q.i 8
7.c even 3 1 980.2.e.d 4
7.c even 3 1 inner 980.2.q.i 8
7.d odd 6 1 980.2.e.d 4
7.d odd 6 1 inner 980.2.q.i 8
35.c odd 2 1 CM 980.2.q.i 8
35.i odd 6 1 980.2.e.d 4
35.i odd 6 1 inner 980.2.q.i 8
35.j even 6 1 980.2.e.d 4
35.j even 6 1 inner 980.2.q.i 8
35.k even 12 2 4900.2.a.bj 4
35.l odd 12 2 4900.2.a.bj 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
980.2.e.d 4 7.c even 3 1
980.2.e.d 4 7.d odd 6 1
980.2.e.d 4 35.i odd 6 1
980.2.e.d 4 35.j even 6 1
980.2.q.i 8 1.a even 1 1 trivial
980.2.q.i 8 5.b even 2 1 inner
980.2.q.i 8 7.b odd 2 1 inner
980.2.q.i 8 7.c even 3 1 inner
980.2.q.i 8 7.d odd 6 1 inner
980.2.q.i 8 35.c odd 2 1 CM
980.2.q.i 8 35.i odd 6 1 inner
980.2.q.i 8 35.j even 6 1 inner
4900.2.a.bj 4 35.k even 12 2
4900.2.a.bj 4 35.l odd 12 2

Hecke kernels

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

\( T_{3}^{8} - 13T_{3}^{6} + 153T_{3}^{4} - 208T_{3}^{2} + 256 \) Copy content Toggle raw display
\( T_{11}^{4} + 3T_{11}^{3} + 33T_{11}^{2} - 72T_{11} + 576 \) Copy content Toggle raw display
\( T_{19} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} - 13 T^{6} + \cdots + 256 \) Copy content Toggle raw display
$5$ \( (T^{4} - 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} + 3 T^{3} + \cdots + 576)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 33 T^{2} + 36)^{2} \) Copy content Toggle raw display
$17$ \( T^{8} - 97 T^{6} + \cdots + 4477456 \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( (T^{2} + 9 T - 6)^{4} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( T^{8} - 157 T^{6} + \cdots + 65536 \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( (T + 12)^{8} \) Copy content Toggle raw display
$73$ \( (T^{4} - 180 T^{2} + 32400)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} - T^{3} + \cdots + 55696)^{2} \) Copy content Toggle raw display
$83$ \( (T^{2} + 80)^{4} \) Copy content Toggle raw display
$89$ \( T^{8} \) Copy content Toggle raw display
$97$ \( (T^{4} + 537 T^{2} + 60516)^{2} \) Copy content Toggle raw display
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