Properties

Label 8464.2.a.bo
Level $8464$
Weight $2$
Character orbit 8464.a
Self dual yes
Analytic conductor $67.585$
Analytic rank $0$
Dimension $4$
Inner twists $2$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [8464,2,Mod(1,8464)] mf = mfinit([N,k,chi],0) lf = mfeigenbasis(mf)
 
Copy content magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code chi := DirichletCharacter("8464.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(8464, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 8464 = 2^{4} \cdot 23^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 8464.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,0,2,0,0,0,0,0,6,0,0,0,10] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(13)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(67.5853802708\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: 4.4.9248.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 5x^{2} + 2 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: no (minimal twist has level 4232)
Fricke sign: \(-1\)
Sato-Tate group: $\mathrm{SU}(2)$

$q$-expansion

Copy content comment:q-expansion
 
Copy content sage:f.q_expansion() # note that sage often uses an isomorphic number field
 
Copy content gp:mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (\beta_{2} + 1) q^{3} - \beta_1 q^{5} - \beta_{3} q^{7} + (\beta_{2} + 2) q^{9} + \beta_1 q^{11} + (\beta_{2} + 3) q^{13} + ( - \beta_{3} - 2 \beta_1) q^{15} - \beta_{3} q^{17} + ( - \beta_{3} + \beta_1) q^{19}+ \cdots + (\beta_{3} + 3 \beta_1) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 2 q^{3} + 6 q^{9} + 10 q^{13} + 20 q^{25} + 14 q^{27} - 10 q^{29} - 14 q^{31} + 8 q^{35} + 22 q^{39} + 18 q^{41} - 6 q^{47} + 28 q^{49} - 40 q^{55} - 16 q^{59} + 18 q^{71} - 26 q^{73} + 78 q^{75}+ \cdots - 32 q^{95}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( 2\nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 3 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( 2\nu^{3} - 8\nu \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_1 ) / 2 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 3 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( \beta_{3} + 4\beta_1 ) / 2 \) Copy content Toggle raw display

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.

Copy content comment:embeddings in the coefficient field
 
Copy content gp:mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1.1
0.662153
−0.662153
2.13578
−2.13578
0 −1.56155 0 −1.32431 0 4.71659 0 −0.561553 0
1.2 0 −1.56155 0 1.32431 0 −4.71659 0 −0.561553 0
1.3 0 2.56155 0 −4.27156 0 −2.39871 0 3.56155 0
1.4 0 2.56155 0 4.27156 0 2.39871 0 3.56155 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(23\) \( -1 \)

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
23.b odd 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 8464.2.a.bo 4
4.b odd 2 1 4232.2.a.r 4
23.b odd 2 1 inner 8464.2.a.bo 4
92.b even 2 1 4232.2.a.r 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
4232.2.a.r 4 4.b odd 2 1
4232.2.a.r 4 92.b even 2 1
8464.2.a.bo 4 1.a even 1 1 trivial
8464.2.a.bo 4 23.b 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(8464))\):

\( T_{3}^{2} - T_{3} - 4 \) Copy content Toggle raw display
\( T_{5}^{4} - 20T_{5}^{2} + 32 \) Copy content Toggle raw display
\( T_{7}^{4} - 28T_{7}^{2} + 128 \) Copy content Toggle raw display
\( T_{13}^{2} - 5T_{13} + 2 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( (T^{2} - T - 4)^{2} \) Copy content Toggle raw display
$5$ \( T^{4} - 20T^{2} + 32 \) Copy content Toggle raw display
$7$ \( T^{4} - 28T^{2} + 128 \) Copy content Toggle raw display
$11$ \( T^{4} - 20T^{2} + 32 \) Copy content Toggle raw display
$13$ \( (T^{2} - 5 T + 2)^{2} \) Copy content Toggle raw display
$17$ \( T^{4} - 28T^{2} + 128 \) Copy content Toggle raw display
$19$ \( T^{4} - 40T^{2} + 128 \) Copy content Toggle raw display
$23$ \( T^{4} \) Copy content Toggle raw display
$29$ \( (T^{2} + 5 T + 2)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} + 7 T + 8)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} - 148T^{2} + 5408 \) Copy content Toggle raw display
$41$ \( (T^{2} - 9 T - 18)^{2} \) Copy content Toggle raw display
$43$ \( T^{4} - 184T^{2} + 8192 \) Copy content Toggle raw display
$47$ \( (T^{2} + 3 T - 104)^{2} \) Copy content Toggle raw display
$53$ \( T^{4} - 40T^{2} + 128 \) Copy content Toggle raw display
$59$ \( (T + 4)^{4} \) Copy content Toggle raw display
$61$ \( T^{4} - 56T^{2} + 512 \) Copy content Toggle raw display
$67$ \( T^{4} - 20T^{2} + 32 \) Copy content Toggle raw display
$71$ \( (T^{2} - 9 T + 16)^{2} \) Copy content Toggle raw display
$73$ \( (T^{2} + 13 T + 38)^{2} \) Copy content Toggle raw display
$79$ \( T^{4} - 80T^{2} + 512 \) Copy content Toggle raw display
$83$ \( T^{4} - 244 T^{2} + 11552 \) Copy content Toggle raw display
$89$ \( T^{4} - 368 T^{2} + 32768 \) Copy content Toggle raw display
$97$ \( T^{4} - 252 T^{2} + 10368 \) Copy content Toggle raw display
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