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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [513,2,Mod(1,513)] 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("513.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(513, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 513 = 3^{3} \cdot 19 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 513.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [4,0,0,8] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(4)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: yes
Analytic conductor: \(4.09632562369\)
Analytic rank: \(0\)
Dimension: \(4\)
Coefficient field: \(\Q(\sqrt{4 + \sqrt{3}})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 8x^{2} + 13 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
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.

\(f(q)\) \(=\) \( q + \beta_1 q^{2} + (\beta_{2} + 2) q^{4} - \beta_{3} q^{5} + (\beta_{2} + 3) q^{7} + (\beta_{3} + \beta_1) q^{8} + ( - 3 \beta_{2} + 1) q^{10} + ( - \beta_{3} - \beta_1) q^{11} + 2 \beta_{2} q^{13} + (\beta_{3} + 4 \beta_1) q^{14}+ \cdots + (6 \beta_{3} + 11 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 8 q^{4} + 12 q^{7} + 4 q^{10} - 4 q^{16} - 4 q^{19} - 12 q^{22} + 20 q^{25} + 36 q^{28} + 8 q^{31} - 4 q^{37} - 36 q^{40} - 4 q^{43} + 28 q^{46} + 20 q^{49} + 24 q^{52} + 36 q^{55} - 52 q^{58} - 8 q^{61}+ \cdots + 4 q^{97}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 4 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \nu^{3} - 5\nu \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{3} + 5\beta_1 \) 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
−2.39417
−1.50597
1.50597
2.39417
−2.39417 0 3.73205 1.75265 0 4.73205 −4.14682 0 −4.19615
1.2 −1.50597 0 0.267949 −4.11439 0 1.26795 2.60842 0 6.19615
1.3 1.50597 0 0.267949 4.11439 0 1.26795 −2.60842 0 6.19615
1.4 2.39417 0 3.73205 −1.75265 0 4.73205 4.14682 0 −4.19615
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(3\) \( -1 \)
\(19\) \( +1 \)

Inner twists

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

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 513.2.a.i ✓ 4
3.b odd 2 1 inner 513.2.a.i ✓ 4
4.b odd 2 1 8208.2.a.bt 4
12.b even 2 1 8208.2.a.bt 4
19.b odd 2 1 9747.2.a.bf 4
57.d even 2 1 9747.2.a.bf 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
513.2.a.i ✓ 4 1.a even 1 1 trivial
513.2.a.i ✓ 4 3.b odd 2 1 inner
8208.2.a.bt 4 4.b odd 2 1
8208.2.a.bt 4 12.b even 2 1
9747.2.a.bf 4 19.b odd 2 1
9747.2.a.bf 4 57.d even 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{4} - 8T_{2}^{2} + 13 \) acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(513))\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} - 8T^{2} + 13 \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} - 20T^{2} + 52 \) Copy content Toggle raw display
$7$ \( (T^{2} - 6 T + 6)^{2} \) Copy content Toggle raw display
$11$ \( T^{4} - 24T^{2} + 117 \) Copy content Toggle raw display
$13$ \( (T^{2} - 12)^{2} \) Copy content Toggle raw display
$17$ \( T^{4} \) Copy content Toggle raw display
$19$ \( (T + 1)^{4} \) Copy content Toggle raw display
$23$ \( T^{4} - 44T^{2} + 52 \) Copy content Toggle raw display
$29$ \( T^{4} - 104T^{2} + 2197 \) Copy content Toggle raw display
$31$ \( (T^{2} - 4 T - 71)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} + 2 T - 26)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} - 128T^{2} + 1573 \) Copy content Toggle raw display
$43$ \( (T^{2} + 2 T - 2)^{2} \) Copy content Toggle raw display
$47$ \( T^{4} - 72T^{2} + 1053 \) Copy content Toggle raw display
$53$ \( T^{4} - 72T^{2} + 1053 \) Copy content Toggle raw display
$59$ \( T^{4} - 60T^{2} + 468 \) Copy content Toggle raw display
$61$ \( (T^{2} + 4 T - 23)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 8 T + 13)^{2} \) Copy content Toggle raw display
$71$ \( T^{4} - 240T^{2} + 7488 \) Copy content Toggle raw display
$73$ \( (T^{2} - 8 T - 131)^{2} \) Copy content Toggle raw display
$79$ \( (T + 9)^{4} \) Copy content Toggle raw display
$83$ \( T^{4} - 200T^{2} + 8125 \) Copy content Toggle raw display
$89$ \( T^{4} - 512 T^{2} + 65533 \) Copy content Toggle raw display
$97$ \( (T^{2} - 2 T - 74)^{2} \) Copy content Toggle raw display
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