Properties

Label 520.2.p.a
Level $520$
Weight $2$
Character orbit 520.p
Analytic conductor $4.152$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [520,2,Mod(389,520)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(520, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 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("520.389");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 520 = 2^{3} \cdot 5 \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 520.p (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: \(4.15222090511\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.207360000.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 6x^{6} + 32x^{4} + 24x^{2} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{4} \)
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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + (\beta_{7} - \beta_{4}) q^{3} - \beta_{5} q^{4} + ( - \beta_{6} - \beta_{2} - \beta_1) q^{5} + (2 \beta_{6} + \beta_{3}) q^{6} + (2 \beta_{2} + \beta_1) q^{8} + 7 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{2} + (\beta_{7} - \beta_{4}) q^{3} - \beta_{5} q^{4} + ( - \beta_{6} - \beta_{2} - \beta_1) q^{5} + (2 \beta_{6} + \beta_{3}) q^{6} + (2 \beta_{2} + \beta_1) q^{8} + 7 q^{9} + (\beta_{5} + \beta_{4} + 2) q^{10} + \beta_{6} q^{11} + ( - 2 \beta_{7} - 3 \beta_{4}) q^{12} + ( - \beta_{7} + \beta_{4} + \cdots + \beta_1) q^{13}+ \cdots + 7 \beta_{6} q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 4 q^{4} + 56 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 4 q^{4} + 56 q^{9} + 12 q^{10} - 28 q^{16} - 8 q^{25} - 12 q^{26} - 40 q^{30} + 28 q^{36} - 80 q^{39} + 36 q^{40} - 56 q^{49} - 16 q^{55} - 44 q^{64} + 24 q^{65} + 40 q^{66} - 32 q^{79} + 152 q^{81} + 84 q^{90} + 80 q^{94} + 48 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 6x^{6} + 32x^{4} + 24x^{2} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{6} + 8\nu^{4} + 48\nu^{2} + 56 ) / 32 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{6} + 4\nu^{4} + 24\nu^{2} - 8 ) / 16 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{7} + 8\nu^{5} + 48\nu^{3} + 120\nu ) / 32 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{7} + 4\nu^{5} + 24\nu^{3} - 24\nu ) / 16 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -\nu^{6} - 6\nu^{4} - 28\nu^{2} - 16 ) / 8 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -3\nu^{7} - 16\nu^{5} - 80\nu^{3} - 8\nu ) / 32 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -\nu^{7} - 6\nu^{5} - 32\nu^{3} - 16\nu ) / 8 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{7} - \beta_{6} + \beta_{3} ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{5} + \beta_{2} + 2\beta _1 - 1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( -2\beta_{7} + 4\beta_{6} + 2\beta_{4} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( -6\beta_{5} - 10\beta_{2} - 4\beta _1 - 10 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( -6\beta_{7} - 6\beta_{6} - 16\beta_{4} - 10\beta_{3} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 32\beta_{2} - 32\beta _1 + 72 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 84\beta_{7} - 84\beta_{6} + 32\beta_{4} + 52\beta_{3} \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/520\mathbb{Z}\right)^\times\).

\(n\) \(41\) \(261\) \(391\) \(417\)
\(\chi(n)\) \(-1\) \(-1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
389.1
−1.14412 + 1.98168i
1.14412 1.98168i
−1.14412 1.98168i
1.14412 + 1.98168i
−0.437016 + 0.756934i
0.437016 0.756934i
−0.437016 0.756934i
0.437016 + 0.756934i
−1.11803 0.866025i −3.16228 0.500000 + 1.93649i −1.41421 + 1.73205i 3.53553 + 2.73861i 0 1.11803 2.59808i 7.00000 3.08114 0.711747i
389.2 −1.11803 0.866025i 3.16228 0.500000 + 1.93649i 1.41421 + 1.73205i −3.53553 2.73861i 0 1.11803 2.59808i 7.00000 −0.0811388 3.16124i
389.3 −1.11803 + 0.866025i −3.16228 0.500000 1.93649i −1.41421 1.73205i 3.53553 2.73861i 0 1.11803 + 2.59808i 7.00000 3.08114 + 0.711747i
389.4 −1.11803 + 0.866025i 3.16228 0.500000 1.93649i 1.41421 1.73205i −3.53553 + 2.73861i 0 1.11803 + 2.59808i 7.00000 −0.0811388 + 3.16124i
389.5 1.11803 0.866025i −3.16228 0.500000 1.93649i 1.41421 + 1.73205i −3.53553 + 2.73861i 0 −1.11803 2.59808i 7.00000 3.08114 + 0.711747i
389.6 1.11803 0.866025i 3.16228 0.500000 1.93649i −1.41421 + 1.73205i 3.53553 2.73861i 0 −1.11803 2.59808i 7.00000 −0.0811388 + 3.16124i
389.7 1.11803 + 0.866025i −3.16228 0.500000 + 1.93649i 1.41421 1.73205i −3.53553 2.73861i 0 −1.11803 + 2.59808i 7.00000 3.08114 0.711747i
389.8 1.11803 + 0.866025i 3.16228 0.500000 + 1.93649i −1.41421 1.73205i 3.53553 + 2.73861i 0 −1.11803 + 2.59808i 7.00000 −0.0811388 3.16124i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 389.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.b even 2 1 inner
8.b even 2 1 inner
13.b even 2 1 inner
40.f even 2 1 inner
65.d even 2 1 inner
104.e even 2 1 inner
520.p even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 520.2.p.a 8
4.b odd 2 1 2080.2.p.a 8
5.b even 2 1 inner 520.2.p.a 8
8.b even 2 1 inner 520.2.p.a 8
8.d odd 2 1 2080.2.p.a 8
13.b even 2 1 inner 520.2.p.a 8
20.d odd 2 1 2080.2.p.a 8
40.e odd 2 1 2080.2.p.a 8
40.f even 2 1 inner 520.2.p.a 8
52.b odd 2 1 2080.2.p.a 8
65.d even 2 1 inner 520.2.p.a 8
104.e even 2 1 inner 520.2.p.a 8
104.h odd 2 1 2080.2.p.a 8
260.g odd 2 1 2080.2.p.a 8
520.b odd 2 1 2080.2.p.a 8
520.p even 2 1 inner 520.2.p.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
520.2.p.a 8 1.a even 1 1 trivial
520.2.p.a 8 5.b even 2 1 inner
520.2.p.a 8 8.b even 2 1 inner
520.2.p.a 8 13.b even 2 1 inner
520.2.p.a 8 40.f even 2 1 inner
520.2.p.a 8 65.d even 2 1 inner
520.2.p.a 8 104.e even 2 1 inner
520.2.p.a 8 520.p even 2 1 inner
2080.2.p.a 8 4.b odd 2 1
2080.2.p.a 8 8.d odd 2 1
2080.2.p.a 8 20.d odd 2 1
2080.2.p.a 8 40.e odd 2 1
2080.2.p.a 8 52.b odd 2 1
2080.2.p.a 8 104.h odd 2 1
2080.2.p.a 8 260.g odd 2 1
2080.2.p.a 8 520.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{3}^{2} - 10 \) acting on \(S_{2}^{\mathrm{new}}(520, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - T^{2} + 4)^{2} \) Copy content Toggle raw display
$3$ \( (T^{2} - 10)^{4} \) Copy content Toggle raw display
$5$ \( (T^{4} + 2 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{2} - 2)^{4} \) Copy content Toggle raw display
$13$ \( (T^{4} - 14 T^{2} + 169)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + 24)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} - 18)^{4} \) Copy content Toggle raw display
$23$ \( (T^{2} + 6)^{4} \) Copy content Toggle raw display
$29$ \( (T^{2} + 60)^{4} \) Copy content Toggle raw display
$31$ \( (T^{2} + 30)^{4} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( (T^{2} - 10)^{4} \) Copy content Toggle raw display
$47$ \( (T^{2} - 80)^{4} \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( (T^{2} - 98)^{4} \) Copy content Toggle raw display
$61$ \( (T^{2} + 60)^{4} \) Copy content Toggle raw display
$67$ \( (T^{2} + 108)^{4} \) Copy content Toggle raw display
$71$ \( (T^{2} + 30)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} - 180)^{4} \) Copy content Toggle raw display
$79$ \( (T + 4)^{8} \) Copy content Toggle raw display
$83$ \( (T^{2} + 300)^{4} \) Copy content Toggle raw display
$89$ \( (T^{2} + 120)^{4} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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