Properties

Label 678.2.a.j
Level $678$
Weight $2$
Character orbit 678.a
Self dual yes
Analytic conductor $5.414$
Analytic rank $0$
Dimension $3$
CM no
Inner twists $1$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [678,2,Mod(1,678)] 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("678.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(678, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 678 = 2 \cdot 3 \cdot 113 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 678.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [3,3,-3,3,1] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(5)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(5.41385725704\)
Analytic rank: \(0\)
Dimension: \(3\)
Coefficient field: 3.3.469.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - x^{2} - 5x + 4 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
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 \(1,\beta_1,\beta_2\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + q^{2} - q^{3} + q^{4} + (\beta_{2} - \beta_1 + 1) q^{5} - q^{6} + (\beta_{2} + 1) q^{7} + q^{8} + q^{9} + (\beta_{2} - \beta_1 + 1) q^{10} + ( - \beta_{2} + 2) q^{11} - q^{12} + ( - \beta_{2} + \beta_1 - 1) q^{13}+ \cdots + ( - \beta_{2} + 2) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 3 q + 3 q^{2} - 3 q^{3} + 3 q^{4} + q^{5} - 3 q^{6} + 2 q^{7} + 3 q^{8} + 3 q^{9} + q^{10} + 7 q^{11} - 3 q^{12} - q^{13} + 2 q^{14} - q^{15} + 3 q^{16} + 3 q^{18} + 5 q^{19} + q^{20} - 2 q^{21} + 7 q^{22}+ \cdots + 7 q^{99}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 4 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 4 \) 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
0.772866
2.39138
−2.16425
1.00000 −1.00000 1.00000 −3.17554 −1.00000 −2.40268 1.00000 1.00000 −3.17554
1.2 1.00000 −1.00000 1.00000 0.327327 −1.00000 2.71871 1.00000 1.00000 0.327327
1.3 1.00000 −1.00000 1.00000 3.84822 −1.00000 1.68397 1.00000 1.00000 3.84822
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( -1 \)
\(3\) \( +1 \)
\(113\) \( +1 \)

Inner twists

This newform does not admit any (nontrivial) inner twists.

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 678.2.a.j 3
3.b odd 2 1 2034.2.a.q 3
4.b odd 2 1 5424.2.a.bk 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
678.2.a.j 3 1.a even 1 1 trivial
2034.2.a.q 3 3.b odd 2 1
5424.2.a.bk 3 4.b odd 2 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(678))\):

\( T_{5}^{3} - T_{5}^{2} - 12T_{5} + 4 \) Copy content Toggle raw display
\( T_{7}^{3} - 2T_{7}^{2} - 6T_{7} + 11 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T - 1)^{3} \) Copy content Toggle raw display
$3$ \( (T + 1)^{3} \) Copy content Toggle raw display
$5$ \( T^{3} - T^{2} - 12T + 4 \) Copy content Toggle raw display
$7$ \( T^{3} - 2 T^{2} + \cdots + 11 \) Copy content Toggle raw display
$11$ \( T^{3} - 7 T^{2} + \cdots - 2 \) Copy content Toggle raw display
$13$ \( T^{3} + T^{2} - 12T - 4 \) Copy content Toggle raw display
$17$ \( T^{3} - 28T + 49 \) Copy content Toggle raw display
$19$ \( T^{3} - 5 T^{2} + \cdots + 98 \) Copy content Toggle raw display
$23$ \( T^{3} - 16 T^{2} + \cdots - 121 \) Copy content Toggle raw display
$29$ \( T^{3} + 2 T^{2} + \cdots + 88 \) Copy content Toggle raw display
$31$ \( T^{3} + 8 T^{2} + \cdots - 463 \) Copy content Toggle raw display
$37$ \( T^{3} - T^{2} - 7T - 4 \) Copy content Toggle raw display
$41$ \( T^{3} - 8 T^{2} + \cdots + 112 \) Copy content Toggle raw display
$43$ \( T^{3} - 3 T^{2} + \cdots + 94 \) Copy content Toggle raw display
$47$ \( T^{3} - 11 T^{2} + \cdots - 32 \) Copy content Toggle raw display
$53$ \( T^{3} - 5 T^{2} + \cdots + 398 \) Copy content Toggle raw display
$59$ \( T^{3} + T^{2} - 12T - 4 \) Copy content Toggle raw display
$61$ \( T^{3} + 27 T^{2} + \cdots + 596 \) Copy content Toggle raw display
$67$ \( T^{3} - 15 T^{2} + \cdots + 1298 \) Copy content Toggle raw display
$71$ \( T^{3} - 18 T^{2} + \cdots + 1 \) Copy content Toggle raw display
$73$ \( (T + 4)^{3} \) Copy content Toggle raw display
$79$ \( T^{3} + 8 T^{2} + \cdots - 112 \) Copy content Toggle raw display
$83$ \( T^{3} + 13 T^{2} + \cdots + 8 \) Copy content Toggle raw display
$89$ \( T^{3} + 3 T^{2} + \cdots - 226 \) Copy content Toggle raw display
$97$ \( T^{3} - T^{2} + \cdots - 1574 \) Copy content Toggle raw display
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