Properties

Label 3648.2.g.f
Level $3648$
Weight $2$
Character orbit 3648.g
Analytic conductor $29.129$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [3648,2,Mod(1825,3648)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(3648, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 0, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("3648.1825");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 3648 = 2^{6} \cdot 3 \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 3648.g (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: \(29.1294266574\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.256992219136.8
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 105x^{4} + 64 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{3} \)
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.

\(f(q)\) \(=\) \( q - \beta_1 q^{3} + \beta_{4} q^{5} + \beta_{7} q^{7} - q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_1 q^{3} + \beta_{4} q^{5} + \beta_{7} q^{7} - q^{9} + ( - \beta_{3} - \beta_1) q^{11} + (\beta_{6} + \beta_{4}) q^{13} - \beta_{5} q^{15} + ( - \beta_{2} - 3) q^{17} - \beta_1 q^{19} - \beta_{6} q^{21} + ( - 3 \beta_{7} - \beta_{5}) q^{23} + (\beta_{2} - 4) q^{25} + \beta_1 q^{27} + 2 \beta_{6} q^{29} + ( - 3 \beta_{7} - \beta_{5}) q^{31} + ( - \beta_{2} - 1) q^{33} + (\beta_{3} + \beta_1) q^{35} + (3 \beta_{6} + \beta_{4}) q^{37} + (\beta_{7} - \beta_{5}) q^{39} - 4 q^{41} + ( - \beta_{3} + 7 \beta_1) q^{43} - \beta_{4} q^{45} - \beta_{5} q^{47} + (\beta_{2} - 2) q^{49} + (\beta_{3} + 3 \beta_1) q^{51} - 2 \beta_{6} q^{53} + (5 \beta_{7} + 2 \beta_{5}) q^{55} - q^{57} + 2 \beta_{3} q^{59} + ( - 3 \beta_{6} + 2 \beta_{4}) q^{61} - \beta_{7} q^{63} - 10 q^{65} + (3 \beta_{6} - \beta_{4}) q^{69} + (\beta_{2} - 3) q^{73} + ( - \beta_{3} + 4 \beta_1) q^{75} + ( - 5 \beta_{6} - 2 \beta_{4}) q^{77} + (\beta_{7} + \beta_{5}) q^{79} + q^{81} - 4 \beta_1 q^{83} - 5 \beta_{6} q^{85} + 2 \beta_{7} q^{87} - 10 q^{89} + (2 \beta_{3} + 6 \beta_1) q^{91} + (3 \beta_{6} - \beta_{4}) q^{93} - \beta_{5} q^{95} + 2 q^{97} + (\beta_{3} + \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 8 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 8 q^{9} - 28 q^{17} - 28 q^{25} - 12 q^{33} - 32 q^{41} - 12 q^{49} - 8 q^{57} - 80 q^{65} - 20 q^{73} + 8 q^{81} - 80 q^{89} + 16 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 105x^{4} + 64 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( \nu^{6} + 113\nu^{2} ) / 88 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{4} + 58 ) / 11 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 3\nu^{6} + 295\nu^{2} ) / 44 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 7\nu^{7} + 8\nu^{5} + 703\nu^{3} + 552\nu ) / 352 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( 7\nu^{7} - 8\nu^{5} + 703\nu^{3} - 552\nu ) / 352 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( 11\nu^{7} + 8\nu^{5} + 1155\nu^{3} + 904\nu ) / 352 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -11\nu^{7} + 8\nu^{5} - 1155\nu^{3} + 904\nu ) / 352 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{7} + \beta_{6} + \beta_{5} - \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( -\beta_{3} + 6\beta_1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -7\beta_{7} + 7\beta_{6} - 11\beta_{5} - 11\beta_{4} ) / 2 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( 11\beta_{2} - 58 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -69\beta_{7} - 69\beta_{6} - 113\beta_{5} + 113\beta_{4} ) / 2 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 113\beta_{3} - 590\beta_1 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 703\beta_{7} - 703\beta_{6} + 1155\beta_{5} + 1155\beta_{4} ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3648\mathbb{Z}\right)^\times\).

\(n\) \(1217\) \(1921\) \(2053\) \(2623\)
\(\chi(n)\) \(1\) \(1\) \(-1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1825.1
2.26020 + 2.26020i
−0.625703 0.625703i
0.625703 + 0.625703i
−2.26020 2.26020i
−2.26020 + 2.26020i
0.625703 0.625703i
−0.625703 + 0.625703i
2.26020 2.26020i
0 1.00000i 0 3.63552i 0 0.884878 0 −1.00000 0
1825.2 0 1.00000i 0 1.94500i 0 −3.19640 0 −1.00000 0
1825.3 0 1.00000i 0 1.94500i 0 3.19640 0 −1.00000 0
1825.4 0 1.00000i 0 3.63552i 0 −0.884878 0 −1.00000 0
1825.5 0 1.00000i 0 3.63552i 0 −0.884878 0 −1.00000 0
1825.6 0 1.00000i 0 1.94500i 0 3.19640 0 −1.00000 0
1825.7 0 1.00000i 0 1.94500i 0 −3.19640 0 −1.00000 0
1825.8 0 1.00000i 0 3.63552i 0 0.884878 0 −1.00000 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1825.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
4.b odd 2 1 inner
8.b even 2 1 inner
8.d odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 3648.2.g.f 8
4.b odd 2 1 inner 3648.2.g.f 8
8.b even 2 1 inner 3648.2.g.f 8
8.d odd 2 1 inner 3648.2.g.f 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
3648.2.g.f 8 1.a even 1 1 trivial
3648.2.g.f 8 4.b odd 2 1 inner
3648.2.g.f 8 8.b even 2 1 inner
3648.2.g.f 8 8.d odd 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(3648, [\chi])\):

\( T_{5}^{4} + 17T_{5}^{2} + 50 \) Copy content Toggle raw display
\( T_{11}^{4} + 49T_{11}^{2} + 400 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$5$ \( (T^{4} + 17 T^{2} + 50)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} - 11 T^{2} + 8)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 49 T^{2} + 400)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 34 T^{2} + 200)^{2} \) Copy content Toggle raw display
$17$ \( (T^{2} + 7 T - 10)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 1)^{4} \) Copy content Toggle raw display
$23$ \( (T^{4} - 98 T^{2} + 2312)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} + 44 T^{2} + 128)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} - 98 T^{2} + 2312)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} + 134 T^{2} + 128)^{2} \) Copy content Toggle raw display
$41$ \( (T + 4)^{8} \) Copy content Toggle raw display
$43$ \( (T^{4} + 129 T^{2} + 400)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} - 17 T^{2} + 50)^{2} \) Copy content Toggle raw display
$53$ \( (T^{4} + 44 T^{2} + 128)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} + 180 T^{2} + 7744)^{2} \) Copy content Toggle raw display
$61$ \( (T^{4} + 131 T^{2} + 3200)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( (T^{2} + 5 T - 16)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} - 22 T^{2} + 32)^{2} \) Copy content Toggle raw display
$83$ \( (T^{2} + 16)^{4} \) Copy content Toggle raw display
$89$ \( (T + 10)^{8} \) Copy content Toggle raw display
$97$ \( (T - 2)^{8} \) Copy content Toggle raw display
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