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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [8946,2,Mod(1,8946)] 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("8946.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(8946, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 8946 = 2 \cdot 3^{2} \cdot 7 \cdot 71 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 8946.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [3,-3,0,3,4,0,-3,-3,0,-4,2] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(11)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(71.4341696482\)
Analytic rank: \(0\)
Dimension: \(3\)
Coefficient field: 3.3.148.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - x^{2} - 3x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 994)
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.

\(f(q)\) \(=\) \( q - q^{2} + q^{4} + (\beta_1 + 1) q^{5} - q^{7} - q^{8} + ( - \beta_1 - 1) q^{10} + (\beta_{2} + 2 \beta_1) q^{11} + ( - \beta_{2} + \beta_1 - 3) q^{13} + q^{14} + q^{16} + ( - \beta_{2} + \beta_1 + 1) q^{17}+ \cdots - q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 3 q - 3 q^{2} + 3 q^{4} + 4 q^{5} - 3 q^{7} - 3 q^{8} - 4 q^{10} + 2 q^{11} - 8 q^{13} + 3 q^{14} + 3 q^{16} + 4 q^{17} - 8 q^{19} + 4 q^{20} - 2 q^{22} - 6 q^{23} - 3 q^{25} + 8 q^{26} - 3 q^{28} + 6 q^{29}+ \cdots - 3 q^{98}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{3} - x^{2} - 3x + 1 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - \nu - 2 \) 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

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
−1.48119
0.311108
2.17009
−1.00000 0 1.00000 −0.481194 0 −1.00000 −1.00000 0 0.481194
1.2 −1.00000 0 1.00000 1.31111 0 −1.00000 −1.00000 0 −1.31111
1.3 −1.00000 0 1.00000 3.17009 0 −1.00000 −1.00000 0 −3.17009
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(3\) \( -1 \)
\(7\) \( +1 \)
\(71\) \( +1 \)

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 8946.2.a.bj 3
3.b odd 2 1 994.2.a.k ✓ 3
12.b even 2 1 7952.2.a.q 3
21.c even 2 1 6958.2.a.bd 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
994.2.a.k ✓ 3 3.b odd 2 1
6958.2.a.bd 3 21.c even 2 1
7952.2.a.q 3 12.b even 2 1
8946.2.a.bj 3 1.a even 1 1 trivial

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(8946))\):

\( T_{5}^{3} - 4T_{5}^{2} + 2T_{5} + 2 \) Copy content Toggle raw display
\( T_{11}^{3} - 2T_{11}^{2} - 12T_{11} - 10 \) Copy content Toggle raw display
\( T_{13}^{3} + 8T_{13}^{2} + 12T_{13} + 4 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T + 1)^{3} \) Copy content Toggle raw display
$3$ \( T^{3} \) Copy content Toggle raw display
$5$ \( T^{3} - 4 T^{2} + \cdots + 2 \) Copy content Toggle raw display
$7$ \( (T + 1)^{3} \) Copy content Toggle raw display
$11$ \( T^{3} - 2 T^{2} + \cdots - 10 \) Copy content Toggle raw display
$13$ \( T^{3} + 8 T^{2} + \cdots + 4 \) Copy content Toggle raw display
$17$ \( T^{3} - 4 T^{2} + \cdots + 20 \) Copy content Toggle raw display
$19$ \( T^{3} + 8 T^{2} + \cdots + 10 \) Copy content Toggle raw display
$23$ \( T^{3} + 6 T^{2} + \cdots - 248 \) Copy content Toggle raw display
$29$ \( T^{3} - 6 T^{2} + \cdots + 248 \) Copy content Toggle raw display
$31$ \( T^{3} + 14 T^{2} + \cdots + 76 \) Copy content Toggle raw display
$37$ \( T^{3} + 10 T^{2} + \cdots - 8 \) Copy content Toggle raw display
$41$ \( T^{3} - 4 T^{2} + \cdots + 412 \) Copy content Toggle raw display
$43$ \( T^{3} - 4 T^{2} + \cdots - 80 \) Copy content Toggle raw display
$47$ \( T^{3} - 8 T^{2} + \cdots + 16 \) Copy content Toggle raw display
$53$ \( T^{3} - 4T - 2 \) Copy content Toggle raw display
$59$ \( T^{3} - 18 T^{2} + \cdots + 100 \) Copy content Toggle raw display
$61$ \( T^{3} + 12 T^{2} + \cdots - 100 \) Copy content Toggle raw display
$67$ \( T^{3} - 6 T^{2} + \cdots + 698 \) Copy content Toggle raw display
$71$ \( (T + 1)^{3} \) Copy content Toggle raw display
$73$ \( T^{3} + 12 T^{2} + \cdots - 944 \) Copy content Toggle raw display
$79$ \( T^{3} - 12 T^{2} + \cdots + 400 \) Copy content Toggle raw display
$83$ \( T^{3} - 2 T^{2} + \cdots + 74 \) Copy content Toggle raw display
$89$ \( T^{3} - 20 T^{2} + \cdots + 272 \) Copy content Toggle raw display
$97$ \( T^{3} - 16 T^{2} + \cdots + 1700 \) Copy content Toggle raw display
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