Properties

Label 1568.2.q.f
Level $1568$
Weight $2$
Character orbit 1568.q
Analytic conductor $12.521$
Analytic rank $0$
Dimension $8$
CM discriminant -8
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [1568,2,Mod(815,1568)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1568, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 3, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("1568.815");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1568 = 2^{5} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1568.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: \(12.5205430369\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.339738624.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 4x^{6} + 14x^{4} - 8x^{2} + 4 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{9}]\)
Coefficient ring index: \( 7^{2} \)
Twist minimal: no (minimal twist has level 392)
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.

\(f(q)\) \(=\) \( q + \beta_1 q^{3} + ( - \beta_{5} - 7 \beta_{4}) q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{3} + ( - \beta_{5} - 7 \beta_{4}) q^{9} + (3 \beta_{5} - 2 \beta_{4} + 3 \beta_{2} - 2) q^{11} + \beta_1 q^{17} + ( - \beta_{7} + \beta_{6} - \beta_{3}) q^{19} + (5 \beta_{4} + 5) q^{25} + (\beta_{7} + 4 \beta_{6} + 4 \beta_1) q^{27} + ( - 3 \beta_{7} + 2 \beta_{6} - 3 \beta_{3}) q^{33} + (\beta_{7} + \beta_{6} + \beta_1) q^{41} + ( - 5 \beta_{2} - 6) q^{43} + ( - \beta_{5} - 10 \beta_{4}) q^{51} + (9 \beta_{2} - 8) q^{57} + (3 \beta_{3} + \beta_1) q^{59} + ( - 6 \beta_{5} - 6 \beta_{2}) q^{67} + ( - \beta_{3} + 3 \beta_1) q^{73} - 5 \beta_{6} q^{75} + ( - 11 \beta_{5} - 21 \beta_{4} + \cdots - 21) q^{81}+ \cdots + (19 \beta_{2} - 8) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 28 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 28 q^{9} - 8 q^{11} + 20 q^{25} - 48 q^{43} + 40 q^{51} - 64 q^{57} - 84 q^{81} - 64 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 4x^{6} + 14x^{4} - 8x^{2} + 4 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{7} + 62\nu ) / 14 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{6} + 20 ) / 14 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -3\nu^{7} - 88\nu ) / 14 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -2\nu^{6} + 7\nu^{4} - 28\nu^{2} + 2 ) / 14 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -2\nu^{6} + 7\nu^{4} - 21\nu^{2} + 2 ) / 7 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 9\nu^{7} - 35\nu^{5} + 126\nu^{3} - 72\nu ) / 14 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( 8\nu^{7} - 28\nu^{5} + 91\nu^{3} - 8\nu ) / 7 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{3} + 3\beta_1 ) / 7 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{5} - 2\beta_{4} \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -5\beta_{7} + 8\beta_{6} + 8\beta_1 ) / 7 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 4\beta_{5} - 6\beta_{4} + 4\beta_{2} - 6 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -18\beta_{7} + 26\beta_{6} - 18\beta_{3} ) / 7 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 14\beta_{2} - 20 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( -62\beta_{3} - 88\beta_1 ) / 7 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1568\mathbb{Z}\right)^\times\).

\(n\) \(197\) \(1471\) \(1473\)
\(\chi(n)\) \(-1\) \(-1\) \(-\beta_{4}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
815.1
−0.662827 0.382683i
−1.60021 0.923880i
1.60021 + 0.923880i
0.662827 + 0.382683i
−0.662827 + 0.382683i
−1.60021 + 0.923880i
1.60021 0.923880i
0.662827 0.382683i
0 −2.92586 1.68925i 0 0 0 0 0 4.20711 + 7.28692i 0
815.2 0 −2.53759 1.46508i 0 0 0 0 0 2.79289 + 4.83743i 0
815.3 0 2.53759 + 1.46508i 0 0 0 0 0 2.79289 + 4.83743i 0
815.4 0 2.92586 + 1.68925i 0 0 0 0 0 4.20711 + 7.28692i 0
1391.1 0 −2.92586 + 1.68925i 0 0 0 0 0 4.20711 7.28692i 0
1391.2 0 −2.53759 + 1.46508i 0 0 0 0 0 2.79289 4.83743i 0
1391.3 0 2.53759 1.46508i 0 0 0 0 0 2.79289 4.83743i 0
1391.4 0 2.92586 1.68925i 0 0 0 0 0 4.20711 7.28692i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 815.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
8.d odd 2 1 CM by \(\Q(\sqrt{-2}) \)
7.b odd 2 1 inner
7.c even 3 1 inner
7.d odd 6 1 inner
56.e even 2 1 inner
56.k odd 6 1 inner
56.m even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1568.2.q.f 8
4.b odd 2 1 392.2.m.d 8
7.b odd 2 1 inner 1568.2.q.f 8
7.c even 3 1 1568.2.e.a 4
7.c even 3 1 inner 1568.2.q.f 8
7.d odd 6 1 1568.2.e.a 4
7.d odd 6 1 inner 1568.2.q.f 8
8.b even 2 1 392.2.m.d 8
8.d odd 2 1 CM 1568.2.q.f 8
28.d even 2 1 392.2.m.d 8
28.f even 6 1 392.2.e.a 4
28.f even 6 1 392.2.m.d 8
28.g odd 6 1 392.2.e.a 4
28.g odd 6 1 392.2.m.d 8
56.e even 2 1 inner 1568.2.q.f 8
56.h odd 2 1 392.2.m.d 8
56.j odd 6 1 392.2.e.a 4
56.j odd 6 1 392.2.m.d 8
56.k odd 6 1 1568.2.e.a 4
56.k odd 6 1 inner 1568.2.q.f 8
56.m even 6 1 1568.2.e.a 4
56.m even 6 1 inner 1568.2.q.f 8
56.p even 6 1 392.2.e.a 4
56.p even 6 1 392.2.m.d 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
392.2.e.a 4 28.f even 6 1
392.2.e.a 4 28.g odd 6 1
392.2.e.a 4 56.j odd 6 1
392.2.e.a 4 56.p even 6 1
392.2.m.d 8 4.b odd 2 1
392.2.m.d 8 8.b even 2 1
392.2.m.d 8 28.d even 2 1
392.2.m.d 8 28.f even 6 1
392.2.m.d 8 28.g odd 6 1
392.2.m.d 8 56.h odd 2 1
392.2.m.d 8 56.j odd 6 1
392.2.m.d 8 56.p even 6 1
1568.2.e.a 4 7.c even 3 1
1568.2.e.a 4 7.d odd 6 1
1568.2.e.a 4 56.k odd 6 1
1568.2.e.a 4 56.m even 6 1
1568.2.q.f 8 1.a even 1 1 trivial
1568.2.q.f 8 7.b odd 2 1 inner
1568.2.q.f 8 7.c even 3 1 inner
1568.2.q.f 8 7.d odd 6 1 inner
1568.2.q.f 8 8.d odd 2 1 CM
1568.2.q.f 8 56.e even 2 1 inner
1568.2.q.f 8 56.k odd 6 1 inner
1568.2.q.f 8 56.m even 6 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1568, [\chi])\):

\( T_{3}^{8} - 20T_{3}^{6} + 302T_{3}^{4} - 1960T_{3}^{2} + 9604 \) Copy content Toggle raw display
\( T_{5} \) Copy content Toggle raw display
\( T_{23} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} - 20 T^{6} + \cdots + 9604 \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} + 4 T^{3} + \cdots + 196)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} - 20 T^{6} + \cdots + 9604 \) Copy content Toggle raw display
$19$ \( T^{8} - 52 T^{6} + \cdots + 9604 \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( T^{8} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( (T^{4} + 68 T^{2} + 98)^{2} \) Copy content Toggle raw display
$43$ \( (T^{2} + 12 T - 14)^{4} \) Copy content Toggle raw display
$47$ \( T^{8} \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} - 356 T^{6} + \cdots + 802135684 \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( (T^{4} + 72 T^{2} + 5184)^{2} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} - 244 T^{6} + \cdots + 23059204 \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( (T^{4} + 404 T^{2} + 28322)^{2} \) Copy content Toggle raw display
$89$ \( T^{8} + \cdots + 2687592964 \) Copy content Toggle raw display
$97$ \( (T^{4} + 628 T^{2} + 94178)^{2} \) Copy content Toggle raw display
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