Properties

Label 3864.2.u.e
Level $3864$
Weight $2$
Character orbit 3864.u
Analytic conductor $30.854$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [3864,2,Mod(1609,3864)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(3864, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 0, 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("3864.1609");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 3864 = 2^{3} \cdot 3 \cdot 7 \cdot 23 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 3864.u (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: \(30.8541953410\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.2992527616.3
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 13x^{6} + 52x^{4} + 61x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{2} \)
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.

\(f(q)\) \(=\) \( q - \beta_{5} q^{3} - \beta_{3} q^{5} + ( - \beta_{4} + \beta_1) q^{7} - q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_{5} q^{3} - \beta_{3} q^{5} + ( - \beta_{4} + \beta_1) q^{7} - q^{9} + (\beta_{7} - \beta_{6} - 2 \beta_{5}) q^{11} - \beta_{6} q^{13} + \beta_{7} q^{15} + (\beta_{4} - \beta_{3} - 4) q^{17} + ( - 3 \beta_{4} + \beta_{3}) q^{19} + (\beta_{6} - \beta_{2}) q^{21} + ( - \beta_{7} - \beta_{6} + \cdots - \beta_1) q^{23}+ \cdots + ( - \beta_{7} + \beta_{6} + 2 \beta_{5}) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 2 q^{5} - 2 q^{7} - 8 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 2 q^{5} - 2 q^{7} - 8 q^{9} - 28 q^{17} - 8 q^{19} - 2 q^{21} + 2 q^{23} + 6 q^{25} + 20 q^{29} - 20 q^{33} + 12 q^{35} - 2 q^{39} - 2 q^{45} + 4 q^{49} + 14 q^{61} + 2 q^{63} + 18 q^{69} + 38 q^{71} + 2 q^{77} + 8 q^{81} + 12 q^{83} + 26 q^{85} + 42 q^{89} - 4 q^{91} - 10 q^{95} + 56 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 13x^{6} + 52x^{4} + 61x^{2} + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{6} + 6\nu^{4} + 2\nu^{2} - 1 ) / 8 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{2} + 3 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( \nu^{6} + 10\nu^{4} + 26\nu^{2} + 11 ) / 4 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{7} + 14\nu^{5} + 58\nu^{3} + 63\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( \nu^{7} + 14\nu^{5} + 62\nu^{3} + 83\nu ) / 4 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{7} + 12\nu^{5} + 44\nu^{3} + 47\nu ) / 2 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{3} - 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{6} - 2\beta_{5} - 5\beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{4} - 6\beta_{3} - 2\beta_{2} + 15 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( -\beta_{7} - 7\beta_{6} + 18\beta_{5} + 27\beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( -6\beta_{4} + 34\beta_{3} + 20\beta_{2} - 83 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( 14\beta_{7} + 40\beta_{6} - 128\beta_{5} - 151\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3864\mathbb{Z}\right)^\times\).

\(n\) \(967\) \(1289\) \(1933\) \(2761\) \(2857\)
\(\chi(n)\) \(1\) \(1\) \(1\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1609.1
0.128950i
1.42957i
2.18363i
2.48425i
0.128950i
1.42957i
2.18363i
2.48425i
0 1.00000i 0 −2.98337 0 −2.64261 + 0.128950i 0 −1.00000 0
1609.2 0 1.00000i 0 −0.956338 0 2.22628 1.42957i 0 −1.00000 0
1609.3 0 1.00000i 0 1.76823 0 −1.49391 2.18363i 0 −1.00000 0
1609.4 0 1.00000i 0 3.17148 0 0.910233 + 2.48425i 0 −1.00000 0
1609.5 0 1.00000i 0 −2.98337 0 −2.64261 0.128950i 0 −1.00000 0
1609.6 0 1.00000i 0 −0.956338 0 2.22628 + 1.42957i 0 −1.00000 0
1609.7 0 1.00000i 0 1.76823 0 −1.49391 + 2.18363i 0 −1.00000 0
1609.8 0 1.00000i 0 3.17148 0 0.910233 2.48425i 0 −1.00000 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1609.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
161.c even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 3864.2.u.e yes 8
7.b odd 2 1 3864.2.u.c 8
23.b odd 2 1 3864.2.u.c 8
161.c even 2 1 inner 3864.2.u.e yes 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
3864.2.u.c 8 7.b odd 2 1
3864.2.u.c 8 23.b odd 2 1
3864.2.u.e yes 8 1.a even 1 1 trivial
3864.2.u.e yes 8 161.c even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} - T_{5}^{3} - 11T_{5}^{2} + 8T_{5} + 16 \) acting on \(S_{2}^{\mathrm{new}}(3864, [\chi])\). 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
$5$ \( (T^{4} - T^{3} - 11 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} + 2 T^{7} + \cdots + 2401 \) Copy content Toggle raw display
$11$ \( T^{8} + 50 T^{6} + \cdots + 1936 \) Copy content Toggle raw display
$13$ \( T^{8} + 15 T^{6} + \cdots + 64 \) Copy content Toggle raw display
$17$ \( (T^{4} + 14 T^{3} + \cdots + 40)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} + 4 T^{3} + \cdots - 104)^{2} \) Copy content Toggle raw display
$23$ \( T^{8} - 2 T^{7} + \cdots + 279841 \) Copy content Toggle raw display
$29$ \( (T^{4} - 10 T^{3} + \cdots + 340)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} + 50 T^{6} + \cdots + 64 \) Copy content Toggle raw display
$37$ \( T^{8} + 162 T^{6} + \cdots + 350464 \) Copy content Toggle raw display
$41$ \( T^{8} + 106 T^{6} + \cdots + 4096 \) Copy content Toggle raw display
$43$ \( T^{8} + 215 T^{6} + \cdots + 35344 \) Copy content Toggle raw display
$47$ \( T^{8} + 220 T^{6} + \cdots + 295936 \) Copy content Toggle raw display
$53$ \( T^{8} + 359 T^{6} + \cdots + 47554816 \) Copy content Toggle raw display
$59$ \( T^{8} + 195 T^{6} + \cdots + 2930944 \) Copy content Toggle raw display
$61$ \( (T^{4} - 7 T^{3} - 97 T^{2} + \cdots - 16)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} + 151 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$71$ \( (T^{4} - 19 T^{3} + \cdots + 640)^{2} \) Copy content Toggle raw display
$73$ \( T^{8} + 474 T^{6} + \cdots + 50013184 \) Copy content Toggle raw display
$79$ \( T^{8} + 146 T^{6} + \cdots + 355216 \) Copy content Toggle raw display
$83$ \( (T^{4} - 6 T^{3} + \cdots + 648)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} - 21 T^{3} + \cdots - 1000)^{2} \) Copy content Toggle raw display
$97$ \( (T^{4} - 28 T^{3} + \cdots - 200)^{2} \) Copy content Toggle raw display
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