Properties

Label 648.2.n.n
Level $648$
Weight $2$
Character orbit 648.n
Analytic conductor $5.174$
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] = [648,2,Mod(109,648)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(648, 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("648.109");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 648 = 2^{3} \cdot 3^{4} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 648.n (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: \(5.17430605098\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.49787136.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 3x^{6} + 5x^{4} + 12x^{2} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 216)
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-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.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + (\beta_{6} + \beta_{4} - \beta_{2} - 1) q^{4} - \beta_{3} q^{5} - \beta_{4} q^{7} + (\beta_{7} + 2 \beta_{5} + \cdots - \beta_1) q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_1 q^{2} + (\beta_{6} + \beta_{4} - \beta_{2} - 1) q^{4} - \beta_{3} q^{5} - \beta_{4} q^{7} + (\beta_{7} + 2 \beta_{5} + \cdots - \beta_1) q^{8}+ \cdots + ( - 6 \beta_{7} + 6 \beta_{3} + 6 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 6 q^{4} - 4 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 6 q^{4} - 4 q^{7} + 4 q^{10} - 2 q^{16} - 6 q^{22} - 16 q^{25} + 12 q^{28} + 28 q^{31} + 28 q^{34} - 10 q^{40} - 56 q^{46} + 24 q^{49} + 28 q^{52} - 24 q^{55} - 12 q^{58} - 36 q^{64} - 2 q^{70} + 24 q^{73} - 28 q^{76} - 16 q^{79} + 56 q^{82} - 30 q^{88} - 28 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 3x^{6} + 5x^{4} + 12x^{2} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{6} + 5\nu^{4} - 5\nu^{2} - 12 ) / 20 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -\nu^{7} + 5\nu^{5} - 5\nu^{3} - 12\nu ) / 40 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 3\nu^{6} + 5\nu^{4} + 15\nu^{2} + 36 ) / 20 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -3\nu^{7} - 5\nu^{5} + 5\nu^{3} - 16\nu ) / 40 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{6} - 7 ) / 5 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} + 3\nu^{5} + 5\nu^{3} + 12\nu ) / 8 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{6} + \beta_{4} - \beta_{2} - 1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{7} + 2\beta_{5} - \beta_{3} - \beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{4} + 3\beta_{2} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( \beta_{7} + 5\beta_{3} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( -5\beta_{6} - 7 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -10\beta_{5} - 10\beta_{3} - 7\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/648\mathbb{Z}\right)^\times\).

\(n\) \(325\) \(487\) \(569\)
\(\chi(n)\) \(-1\) \(1\) \(-1 + \beta_{4}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
109.1
−1.09445 0.895644i
−0.228425 1.39564i
0.228425 + 1.39564i
1.09445 + 0.895644i
−1.09445 + 0.895644i
−0.228425 + 1.39564i
0.228425 1.39564i
1.09445 0.895644i
−1.09445 0.895644i 0 0.395644 + 1.96048i −0.866025 0.500000i 0 −0.500000 0.866025i 1.32288 2.50000i 0 0.500000 + 1.32288i
109.2 −0.228425 1.39564i 0 −1.89564 + 0.637600i 0.866025 + 0.500000i 0 −0.500000 0.866025i 1.32288 + 2.50000i 0 0.500000 1.32288i
109.3 0.228425 + 1.39564i 0 −1.89564 + 0.637600i −0.866025 0.500000i 0 −0.500000 0.866025i −1.32288 2.50000i 0 0.500000 1.32288i
109.4 1.09445 + 0.895644i 0 0.395644 + 1.96048i 0.866025 + 0.500000i 0 −0.500000 0.866025i −1.32288 + 2.50000i 0 0.500000 + 1.32288i
541.1 −1.09445 + 0.895644i 0 0.395644 1.96048i −0.866025 + 0.500000i 0 −0.500000 + 0.866025i 1.32288 + 2.50000i 0 0.500000 1.32288i
541.2 −0.228425 + 1.39564i 0 −1.89564 0.637600i 0.866025 0.500000i 0 −0.500000 + 0.866025i 1.32288 2.50000i 0 0.500000 + 1.32288i
541.3 0.228425 1.39564i 0 −1.89564 0.637600i −0.866025 + 0.500000i 0 −0.500000 + 0.866025i −1.32288 + 2.50000i 0 0.500000 + 1.32288i
541.4 1.09445 0.895644i 0 0.395644 1.96048i 0.866025 0.500000i 0 −0.500000 + 0.866025i −1.32288 2.50000i 0 0.500000 1.32288i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 109.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
8.b even 2 1 inner
9.c even 3 1 inner
9.d odd 6 1 inner
24.h odd 2 1 inner
72.j odd 6 1 inner
72.n even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 648.2.n.n 8
3.b odd 2 1 inner 648.2.n.n 8
4.b odd 2 1 2592.2.r.p 8
8.b even 2 1 inner 648.2.n.n 8
8.d odd 2 1 2592.2.r.p 8
9.c even 3 1 216.2.d.b 4
9.c even 3 1 inner 648.2.n.n 8
9.d odd 6 1 216.2.d.b 4
9.d odd 6 1 inner 648.2.n.n 8
12.b even 2 1 2592.2.r.p 8
24.f even 2 1 2592.2.r.p 8
24.h odd 2 1 inner 648.2.n.n 8
36.f odd 6 1 864.2.d.a 4
36.f odd 6 1 2592.2.r.p 8
36.h even 6 1 864.2.d.a 4
36.h even 6 1 2592.2.r.p 8
72.j odd 6 1 216.2.d.b 4
72.j odd 6 1 inner 648.2.n.n 8
72.l even 6 1 864.2.d.a 4
72.l even 6 1 2592.2.r.p 8
72.n even 6 1 216.2.d.b 4
72.n even 6 1 inner 648.2.n.n 8
72.p odd 6 1 864.2.d.a 4
72.p odd 6 1 2592.2.r.p 8
144.u even 12 1 6912.2.a.bd 2
144.u even 12 1 6912.2.a.bv 2
144.v odd 12 1 6912.2.a.bd 2
144.v odd 12 1 6912.2.a.bv 2
144.w odd 12 1 6912.2.a.bc 2
144.w odd 12 1 6912.2.a.bu 2
144.x even 12 1 6912.2.a.bc 2
144.x even 12 1 6912.2.a.bu 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
216.2.d.b 4 9.c even 3 1
216.2.d.b 4 9.d odd 6 1
216.2.d.b 4 72.j odd 6 1
216.2.d.b 4 72.n even 6 1
648.2.n.n 8 1.a even 1 1 trivial
648.2.n.n 8 3.b odd 2 1 inner
648.2.n.n 8 8.b even 2 1 inner
648.2.n.n 8 9.c even 3 1 inner
648.2.n.n 8 9.d odd 6 1 inner
648.2.n.n 8 24.h odd 2 1 inner
648.2.n.n 8 72.j odd 6 1 inner
648.2.n.n 8 72.n even 6 1 inner
864.2.d.a 4 36.f odd 6 1
864.2.d.a 4 36.h even 6 1
864.2.d.a 4 72.l even 6 1
864.2.d.a 4 72.p odd 6 1
2592.2.r.p 8 4.b odd 2 1
2592.2.r.p 8 8.d odd 2 1
2592.2.r.p 8 12.b even 2 1
2592.2.r.p 8 24.f even 2 1
2592.2.r.p 8 36.f odd 6 1
2592.2.r.p 8 36.h even 6 1
2592.2.r.p 8 72.l even 6 1
2592.2.r.p 8 72.p odd 6 1
6912.2.a.bc 2 144.w odd 12 1
6912.2.a.bc 2 144.x even 12 1
6912.2.a.bd 2 144.u even 12 1
6912.2.a.bd 2 144.v odd 12 1
6912.2.a.bu 2 144.w odd 12 1
6912.2.a.bu 2 144.x even 12 1
6912.2.a.bv 2 144.u even 12 1
6912.2.a.bv 2 144.v odd 12 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(648, [\chi])\):

\( T_{5}^{4} - T_{5}^{2} + 1 \) Copy content Toggle raw display
\( T_{13}^{4} - 28T_{13}^{2} + 784 \) Copy content Toggle raw display
\( T_{17}^{2} - 28 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} + 3 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} - T^{2} + 1)^{2} \) Copy content Toggle raw display
$7$ \( (T^{2} + T + 1)^{4} \) Copy content Toggle raw display
$11$ \( (T^{4} - 9 T^{2} + 81)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} - 28 T^{2} + 784)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} - 28)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 28)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} + 28 T^{2} + 784)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} - 36 T^{2} + 1296)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} - 7 T + 49)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} + 28)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} + 28 T^{2} + 784)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} - 112 T^{2} + 12544)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} \) Copy content Toggle raw display
$53$ \( (T^{2} + 81)^{4} \) Copy content Toggle raw display
$59$ \( (T^{4} - 16 T^{2} + 256)^{2} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( (T^{2} - 252)^{4} \) Copy content Toggle raw display
$73$ \( (T - 3)^{8} \) Copy content Toggle raw display
$79$ \( (T^{2} + 4 T + 16)^{4} \) Copy content Toggle raw display
$83$ \( (T^{4} - 49 T^{2} + 2401)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} - 112)^{4} \) Copy content Toggle raw display
$97$ \( (T^{2} + 7 T + 49)^{4} \) Copy content Toggle raw display
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