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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [1521,2,Mod(746,1521)] 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("1521.746"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(1521, base_ring=CyclotomicField(4)) chi = DirichletCharacter(H, H._module([2, 3])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 1521 = 3^{2} \cdot 13^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1521.i (of order \(4\), degree \(2\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [8,0,0,0,0,0,-8] f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(7)] == traces)
 
Copy content gp:f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(12.1452461474\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(i)\)
Coefficient field: \(\Q(\zeta_{24})\)
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 2^{2} \)
Twist minimal: no (minimal twist has level 117)
Sato-Tate group: $\mathrm{SU}(2)[C_{4}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_1 q^{2} - \beta_{3} q^{4} + ( - \beta_{7} - \beta_{4} + 2 \beta_1) q^{5} + ( - 2 \beta_{3} + 2 \beta_{2} - 2) q^{7} - 3 \beta_{5} q^{8} + ( - \beta_{6} - 2 \beta_{3} + \beta_{2} - 1) q^{10} - 2 \beta_{5} q^{11}+ \cdots + ( - 4 \beta_{7} - 3 \beta_{5} + \cdots - 4 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 8 q^{7} + 8 q^{16} - 8 q^{19} + 16 q^{22} - 8 q^{28} + 16 q^{31} - 12 q^{34} + 4 q^{37} - 48 q^{40} + 24 q^{46} - 32 q^{55} - 28 q^{58} - 8 q^{61} - 8 q^{67} - 40 q^{70} - 44 q^{73} + 8 q^{76} + 16 q^{79}+ \cdots - 8 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring

\(\beta_{1}\)\(=\) \( \zeta_{24}^{3} \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \zeta_{24}^{4} + \zeta_{24}^{2} \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( \zeta_{24}^{6} \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( \zeta_{24}^{7} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( -\zeta_{24}^{5} + \zeta_{24} \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( -\zeta_{24}^{4} + \zeta_{24}^{2} \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( -\zeta_{24}^{7} + \zeta_{24}^{5} \) Copy content Toggle raw display
\(\zeta_{24}\)\(=\) \( ( \beta_{7} + \beta_{5} + \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{2}\)\(=\) \( ( \beta_{6} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{3}\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\zeta_{24}^{4}\)\(=\) \( ( -\beta_{6} + \beta_{2} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{5}\)\(=\) \( ( \beta_{7} - \beta_{5} + \beta_{4} ) / 2 \) Copy content Toggle raw display
\(\zeta_{24}^{6}\)\(=\) \( \beta_{3} \) Copy content Toggle raw display
\(\zeta_{24}^{7}\)\(=\) \( ( -\beta_{7} - \beta_{5} + \beta_{4} ) / 2 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1521\mathbb{Z}\right)^\times\).

\(n\) \(677\) \(847\)
\(\chi(n)\) \(-1\) \(-\beta_{3}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
746.1
0.965926 + 0.258819i
−0.258819 − 0.965926i
0.258819 + 0.965926i
−0.965926 − 0.258819i
0.965926 − 0.258819i
−0.258819 + 0.965926i
0.258819 − 0.965926i
−0.965926 + 0.258819i
−0.707107 − 0.707107i 0 − 1.00000i 0.189469 + 0.189469i 0 0.732051 + 0.732051i −2.12132 + 2.12132i 0 − 0.267949i
746.2 −0.707107 − 0.707107i 0 − 1.00000i 2.63896 + 2.63896i 0 −2.73205 − 2.73205i −2.12132 + 2.12132i 0 − 3.73205i
746.3 0.707107 + 0.707107i 0 − 1.00000i −2.63896 − 2.63896i 0 −2.73205 − 2.73205i 2.12132 − 2.12132i 0 − 3.73205i
746.4 0.707107 + 0.707107i 0 − 1.00000i −0.189469 − 0.189469i 0 0.732051 + 0.732051i 2.12132 − 2.12132i 0 − 0.267949i
944.1 −0.707107 + 0.707107i 0 1.00000i 0.189469 − 0.189469i 0 0.732051 − 0.732051i −2.12132 − 2.12132i 0 0.267949i
944.2 −0.707107 + 0.707107i 0 1.00000i 2.63896 − 2.63896i 0 −2.73205 + 2.73205i −2.12132 − 2.12132i 0 3.73205i
944.3 0.707107 − 0.707107i 0 1.00000i −2.63896 + 2.63896i 0 −2.73205 + 2.73205i 2.12132 + 2.12132i 0 3.73205i
944.4 0.707107 − 0.707107i 0 1.00000i −0.189469 + 0.189469i 0 0.732051 − 0.732051i 2.12132 + 2.12132i 0 0.267949i
\(n\): e.g. 2-40 or 80-90
Embeddings: e.g. 1-3 or 746.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
13.d odd 4 1 inner
39.f even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1521.2.i.c 8
3.b odd 2 1 inner 1521.2.i.c 8
13.b even 2 1 1521.2.i.f 8
13.d odd 4 1 inner 1521.2.i.c 8
13.d odd 4 1 1521.2.i.f 8
13.e even 6 1 117.2.ba.b ✓ 8
13.f odd 12 1 117.2.ba.b ✓ 8
39.d odd 2 1 1521.2.i.f 8
39.f even 4 1 inner 1521.2.i.c 8
39.f even 4 1 1521.2.i.f 8
39.h odd 6 1 117.2.ba.b ✓ 8
39.k even 12 1 117.2.ba.b ✓ 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
117.2.ba.b ✓ 8 13.e even 6 1
117.2.ba.b ✓ 8 13.f odd 12 1
117.2.ba.b ✓ 8 39.h odd 6 1
117.2.ba.b ✓ 8 39.k even 12 1
1521.2.i.c 8 1.a even 1 1 trivial
1521.2.i.c 8 3.b odd 2 1 inner
1521.2.i.c 8 13.d odd 4 1 inner
1521.2.i.c 8 39.f even 4 1 inner
1521.2.i.f 8 13.b even 2 1
1521.2.i.f 8 13.d odd 4 1
1521.2.i.f 8 39.d odd 2 1
1521.2.i.f 8 39.f even 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1521, [\chi])\):

\( T_{2}^{4} + 1 \) Copy content Toggle raw display
\( T_{5}^{8} + 194T_{5}^{4} + 1 \) Copy content Toggle raw display
\( T_{7}^{4} + 4T_{7}^{3} + 8T_{7}^{2} - 16T_{7} + 16 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} + 194T^{4} + 1 \) Copy content Toggle raw display
$7$ \( (T^{4} + 4 T^{3} + 8 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} + 16)^{2} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( (T^{4} - 12 T^{2} + 9)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} + 4 T^{3} + 8 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 48 T^{2} + 144)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} + 76 T^{2} + 121)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} - 8 T^{3} + \cdots + 256)^{2} \) Copy content Toggle raw display
$37$ \( (T^{4} - 2 T^{3} + \cdots + 5329)^{2} \) Copy content Toggle raw display
$41$ \( T^{8} + 5138 T^{4} + 28561 \) Copy content Toggle raw display
$43$ \( (T^{2} + 12)^{4} \) Copy content Toggle raw display
$47$ \( T^{8} + 17696 T^{4} + 7311616 \) Copy content Toggle raw display
$53$ \( (T^{4} + 76 T^{2} + 121)^{2} \) Copy content Toggle raw display
$59$ \( T^{8} + 28544 T^{4} + 116985856 \) Copy content Toggle raw display
$61$ \( (T + 1)^{8} \) Copy content Toggle raw display
$67$ \( (T^{4} + 4 T^{3} + 8 T^{2} + \cdots + 16)^{2} \) Copy content Toggle raw display
$71$ \( T^{8} + 6944 T^{4} + 3748096 \) Copy content Toggle raw display
$73$ \( (T^{4} + 22 T^{3} + \cdots + 2209)^{2} \) Copy content Toggle raw display
$79$ \( (T^{2} - 4 T - 104)^{4} \) Copy content Toggle raw display
$83$ \( T^{8} + \cdots + 1249198336 \) Copy content Toggle raw display
$89$ \( T^{8} + 49664 T^{4} + 65536 \) Copy content Toggle raw display
$97$ \( (T^{4} + 4 T^{3} + \cdots + 484)^{2} \) Copy content Toggle raw display
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