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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [906,2,Mod(1,906)] 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("906.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(906, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 906 = 2 \cdot 3 \cdot 151 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 906.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,-4,4,4,2] 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: \(7.23444642313\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: 4.4.2777.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{3} - 4x^{2} + x + 2 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - q^{2} + q^{3} + q^{4} + (\beta_{3} + \beta_{2}) q^{5} - q^{6} + (\beta_{3} + \beta_{2} + \beta_1 - 1) q^{7} - q^{8} + q^{9} + ( - \beta_{3} - \beta_{2}) q^{10} + (\beta_{3} - 2 \beta_{2} + \beta_1 + 2) q^{11}+ \cdots + (\beta_{3} - 2 \beta_{2} + \beta_1 + 2) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 4 q^{2} + 4 q^{3} + 4 q^{4} + 2 q^{5} - 4 q^{6} - q^{7} - 4 q^{8} + 4 q^{9} - 2 q^{10} + 11 q^{11} + 4 q^{12} - 6 q^{13} + q^{14} + 2 q^{15} + 4 q^{16} + 12 q^{17} - 4 q^{18} - 3 q^{19} + 2 q^{20}+ \cdots + 11 q^{99}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - \nu - 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} - \nu^{2} - 3\nu + 1 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + \beta _1 + 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} + \beta_{2} + 4\beta _1 + 1 \) 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
0.825785
−0.679643
−1.50848
2.36234
−1.00000 1.00000 1.00000 −3.74002 −1.00000 −3.91423 −1.00000 1.00000 3.74002
1.2 −1.00000 1.00000 1.00000 1.40464 −1.00000 −0.275008 −1.00000 1.00000 −1.40464
1.3 −1.00000 1.00000 1.00000 1.60135 −1.00000 −0.907129 −1.00000 1.00000 −1.60135
1.4 −1.00000 1.00000 1.00000 2.73403 −1.00000 4.09637 −1.00000 1.00000 −2.73403
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(3\) \( -1 \)
\(151\) \( +1 \)

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 906.2.a.k ✓ 4
3.b odd 2 1 2718.2.a.y 4
4.b odd 2 1 7248.2.a.ba 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
906.2.a.k ✓ 4 1.a even 1 1 trivial
2718.2.a.y 4 3.b odd 2 1
7248.2.a.ba 4 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(906))\):

\( T_{5}^{4} - 2T_{5}^{3} - 11T_{5}^{2} + 33T_{5} - 23 \) Copy content Toggle raw display
\( T_{7}^{4} + T_{7}^{3} - 16T_{7}^{2} - 19T_{7} - 4 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 1)^{4} \) Copy content Toggle raw display
$3$ \( (T - 1)^{4} \) Copy content Toggle raw display
$5$ \( T^{4} - 2 T^{3} + \cdots - 23 \) Copy content Toggle raw display
$7$ \( T^{4} + T^{3} - 16 T^{2} + \cdots - 4 \) Copy content Toggle raw display
$11$ \( T^{4} - 11 T^{3} + \cdots - 328 \) Copy content Toggle raw display
$13$ \( T^{4} + 6 T^{3} + \cdots - 1 \) Copy content Toggle raw display
$17$ \( T^{4} - 12 T^{3} + \cdots - 176 \) Copy content Toggle raw display
$19$ \( T^{4} + 3 T^{3} + \cdots + 162 \) Copy content Toggle raw display
$23$ \( T^{4} - 11 T^{3} + \cdots - 776 \) Copy content Toggle raw display
$29$ \( T^{4} - 14 T^{3} + \cdots - 1451 \) Copy content Toggle raw display
$31$ \( T^{4} + 3 T^{3} + \cdots + 2456 \) Copy content Toggle raw display
$37$ \( T^{4} + 8 T^{3} + \cdots + 592 \) Copy content Toggle raw display
$41$ \( T^{4} - 8 T^{3} + \cdots + 2801 \) Copy content Toggle raw display
$43$ \( T^{4} - 3 T^{3} + \cdots - 694 \) Copy content Toggle raw display
$47$ \( T^{4} - 3 T^{3} + \cdots + 412 \) Copy content Toggle raw display
$53$ \( T^{4} + 2 T^{3} + \cdots - 64 \) Copy content Toggle raw display
$59$ \( T^{4} - 12 T^{3} + \cdots - 256 \) Copy content Toggle raw display
$61$ \( T^{4} + T^{3} + \cdots - 74 \) Copy content Toggle raw display
$67$ \( T^{4} + 11 T^{3} + \cdots + 1592 \) Copy content Toggle raw display
$71$ \( T^{4} + 5 T^{3} + \cdots + 2008 \) Copy content Toggle raw display
$73$ \( T^{4} + 16 T^{3} + \cdots - 13024 \) Copy content Toggle raw display
$79$ \( T^{4} - 9 T^{3} + \cdots + 446 \) Copy content Toggle raw display
$83$ \( T^{4} - 25 T^{3} + \cdots - 6368 \) Copy content Toggle raw display
$89$ \( T^{4} - 8 T^{3} + \cdots - 583 \) Copy content Toggle raw display
$97$ \( T^{4} + 11 T^{3} + \cdots - 2998 \) Copy content Toggle raw display
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