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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [822,2,Mod(1,822)] 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("822.1"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(822, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([0, 0])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 822 = 2 \cdot 3 \cdot 137 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 822.a (trivial)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [3,-3,-3,3,-4] 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: \(6.56370304615\)
Analytic rank: \(1\)
Dimension: \(3\)
Coefficient field: 3.3.961.1
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{3} - x^{2} - 10x + 8 \) 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.

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

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{3} - x^{2} - 10x + 8 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{2} + \nu - 8 ) / 2 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 2\beta_{2} - \beta _1 + 8 \) 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
3.29707
0.786802
−3.08387
−1.00000 −1.00000 1.00000 −4.29707 1.00000 3.08387 −1.00000 1.00000 4.29707
1.2 −1.00000 −1.00000 1.00000 −1.78680 1.00000 −3.29707 −1.00000 1.00000 1.78680
1.3 −1.00000 −1.00000 1.00000 2.08387 1.00000 −0.786802 −1.00000 1.00000 −2.08387
\(n\): e.g. 2-40 or 80-90
Significant digits:
Format:

Atkin-Lehner signs

\( p \) Sign
\(2\) \( +1 \)
\(3\) \( +1 \)
\(137\) \( +1 \)

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 822.2.a.i ✓ 3
3.b odd 2 1 2466.2.a.s 3
4.b odd 2 1 6576.2.a.w 3
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
822.2.a.i ✓ 3 1.a even 1 1 trivial
2466.2.a.s 3 3.b odd 2 1
6576.2.a.w 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(822))\):

\( T_{5}^{3} + 4T_{5}^{2} - 5T_{5} - 16 \) Copy content Toggle raw display
\( T_{7}^{3} + T_{7}^{2} - 10T_{7} - 8 \) 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
$5$ \( T^{3} + 4 T^{2} + \cdots - 16 \) Copy content Toggle raw display
$7$ \( T^{3} + T^{2} - 10T - 8 \) Copy content Toggle raw display
$11$ \( T^{3} - 5 T^{2} + \cdots + 8 \) Copy content Toggle raw display
$13$ \( T^{3} + 2 T^{2} + \cdots - 64 \) Copy content Toggle raw display
$17$ \( T^{3} + 3 T^{2} + \cdots - 92 \) Copy content Toggle raw display
$19$ \( T^{3} - 8 T^{2} + \cdots + 4 \) Copy content Toggle raw display
$23$ \( T^{3} + 17 T^{2} + \cdots + 128 \) Copy content Toggle raw display
$29$ \( T^{3} + 6 T^{2} + \cdots + 8 \) Copy content Toggle raw display
$31$ \( T^{3} - T^{2} - 10T + 8 \) Copy content Toggle raw display
$37$ \( T^{3} + 17 T^{2} + \cdots + 128 \) Copy content Toggle raw display
$41$ \( T^{3} + 16 T^{2} + \cdots - 32 \) Copy content Toggle raw display
$43$ \( T^{3} - 6 T^{2} + \cdots + 736 \) Copy content Toggle raw display
$47$ \( T^{3} + 4 T^{2} + \cdots - 326 \) Copy content Toggle raw display
$53$ \( T^{3} + 31 T^{2} + \cdots + 992 \) Copy content Toggle raw display
$59$ \( T^{3} + 7 T^{2} + \cdots - 1504 \) Copy content Toggle raw display
$61$ \( T^{3} - 7 T^{2} + \cdots + 16 \) Copy content Toggle raw display
$67$ \( T^{3} - 2 T^{2} + \cdots + 64 \) Copy content Toggle raw display
$71$ \( T^{3} + 11 T^{2} + \cdots + 16 \) Copy content Toggle raw display
$73$ \( T^{3} + 2 T^{2} + \cdots - 2 \) Copy content Toggle raw display
$79$ \( T^{3} + 11 T^{2} + \cdots - 356 \) Copy content Toggle raw display
$83$ \( T^{3} + 15 T^{2} + \cdots - 464 \) Copy content Toggle raw display
$89$ \( T^{3} - 13 T^{2} + \cdots + 712 \) Copy content Toggle raw display
$97$ \( T^{3} + 10 T^{2} + \cdots - 2048 \) Copy content Toggle raw display
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