Properties

Label 324.2.b.c
Level $324$
Weight $2$
Character orbit 324.b
Analytic conductor $2.587$
Analytic rank $0$
Dimension $8$
Inner twists $4$

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Newspace parameters

Copy content comment:Compute space of new eigenforms
 
Copy content gp:[N,k,chi] = [324,2,Mod(323,324)] 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("324.323"); S:= CuspForms(chi, 2); N := Newforms(S);
 
Copy content sage:from sage.modular.dirichlet import DirichletCharacter H = DirichletGroup(324, base_ring=CyclotomicField(2)) chi = DirichletCharacter(H, H._module([1, 1])) N = Newforms(chi, 2, names="a")
 
Level: \( N \) \(=\) \( 324 = 2^{2} \cdot 3^{4} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 324.b (of order \(2\), degree \(1\), minimal)

Newform invariants

Copy content comment:select newform
 
Copy content sage:traces = [8,0,0,8] 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: no
Analytic conductor: \(2.58715302549\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.5780865024.3
Copy content comment:defining polynomial
 
Copy content gp:f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - 4x^{6} + 9x^{4} - 16x^{2} + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 1 \)
Twist minimal: yes
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

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

\(f(q)\) \(=\) \( q - \beta_1 q^{2} + (\beta_{2} + 1) q^{4} + (\beta_{5} + \beta_{3}) q^{5} + ( - 2 \beta_{7} - \beta_{6} + 1) q^{7} + ( - \beta_{5} - \beta_{4}) q^{8} + ( - \beta_{7} - \beta_{2} + 1) q^{10} + (2 \beta_{4} - \beta_{3} - 2 \beta_1) q^{11}+ \cdots + ( - 2 \beta_{5} + 2 \beta_{4} + 5 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{4} + 4 q^{10} - 8 q^{13} - 4 q^{16} + 12 q^{22} + 24 q^{25} - 12 q^{28} + 4 q^{34} + 16 q^{37} + 16 q^{40} - 36 q^{46} - 40 q^{49} + 16 q^{52} + 16 q^{58} - 32 q^{61} + 8 q^{64} - 36 q^{70} - 32 q^{73}+ \cdots - 32 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - 4x^{6} + 9x^{4} - 16x^{2} + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( \nu^{2} - 1 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( \nu^{7} + \nu^{3} - 4\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -\nu^{7} + 4\nu^{5} - \nu^{3} + 8\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( \nu^{7} - 4\nu^{5} + 9\nu^{3} - 8\nu ) / 8 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -\nu^{6} + 4\nu^{4} - 5\nu^{2} + 8 ) / 4 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( \nu^{6} - 2\nu^{4} + 3\nu^{2} - 4 ) / 2 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{2} + 1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( \beta_{5} + \beta_{4} \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{7} + 2\beta_{6} + \beta_{2} - 1 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( 2\beta_{4} + 2\beta_{3} - \beta_1 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( 4\beta_{7} + 4\beta_{6} - \beta_{2} - 1 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -\beta_{5} - \beta_{4} + 8\beta_{3} + 4\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/324\mathbb{Z}\right)^\times\).

\(n\) \(163\) \(245\)
\(\chi(n)\) \(-1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
323.1
1.39033 + 0.258819i
1.39033 0.258819i
1.03295 + 0.965926i
1.03295 0.965926i
−1.03295 + 0.965926i
−1.03295 0.965926i
−1.39033 + 0.258819i
−1.39033 0.258819i
−1.39033 0.258819i 0 1.86603 + 0.719687i 1.93185i 0 3.93244i −2.40812 1.48356i 0 0.500000 2.68591i
323.2 −1.39033 + 0.258819i 0 1.86603 0.719687i 1.93185i 0 3.93244i −2.40812 + 1.48356i 0 0.500000 + 2.68591i
323.3 −1.03295 0.965926i 0 0.133975 + 1.99551i 0.517638i 0 2.92163i 1.78912 2.19067i 0 0.500000 0.534695i
323.4 −1.03295 + 0.965926i 0 0.133975 1.99551i 0.517638i 0 2.92163i 1.78912 + 2.19067i 0 0.500000 + 0.534695i
323.5 1.03295 0.965926i 0 0.133975 1.99551i 0.517638i 0 2.92163i −1.78912 2.19067i 0 0.500000 + 0.534695i
323.6 1.03295 + 0.965926i 0 0.133975 + 1.99551i 0.517638i 0 2.92163i −1.78912 + 2.19067i 0 0.500000 0.534695i
323.7 1.39033 0.258819i 0 1.86603 0.719687i 1.93185i 0 3.93244i 2.40812 1.48356i 0 0.500000 + 2.68591i
323.8 1.39033 + 0.258819i 0 1.86603 + 0.719687i 1.93185i 0 3.93244i 2.40812 + 1.48356i 0 0.500000 2.68591i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 323.8
Significant digits:
Format:

Inner twists

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

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 324.2.b.c 8
3.b odd 2 1 inner 324.2.b.c 8
4.b odd 2 1 inner 324.2.b.c 8
8.b even 2 1 5184.2.c.k 8
8.d odd 2 1 5184.2.c.k 8
9.c even 3 2 324.2.h.f 16
9.d odd 6 2 324.2.h.f 16
12.b even 2 1 inner 324.2.b.c 8
24.f even 2 1 5184.2.c.k 8
24.h odd 2 1 5184.2.c.k 8
36.f odd 6 2 324.2.h.f 16
36.h even 6 2 324.2.h.f 16
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
324.2.b.c 8 1.a even 1 1 trivial
324.2.b.c 8 3.b odd 2 1 inner
324.2.b.c 8 4.b odd 2 1 inner
324.2.b.c 8 12.b even 2 1 inner
324.2.h.f 16 9.c even 3 2
324.2.h.f 16 9.d odd 6 2
324.2.h.f 16 36.f odd 6 2
324.2.h.f 16 36.h even 6 2
5184.2.c.k 8 8.b even 2 1
5184.2.c.k 8 8.d odd 2 1
5184.2.c.k 8 24.f even 2 1
5184.2.c.k 8 24.h odd 2 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{4} + 4T_{5}^{2} + 1 \) acting on \(S_{2}^{\mathrm{new}}(324, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} - 4 T^{6} + \cdots + 16 \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} + 4 T^{2} + 1)^{2} \) Copy content Toggle raw display
$7$ \( (T^{4} + 24 T^{2} + 132)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} - 36 T^{2} + 132)^{2} \) Copy content Toggle raw display
$13$ \( (T^{2} + 2 T - 11)^{4} \) Copy content Toggle raw display
$17$ \( (T^{4} + 28 T^{2} + 121)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} + 72 T^{2} + 1188)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 60 T^{2} + 132)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} + 28 T^{2} + 121)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} + 72 T^{2} + 528)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} - 4 T + 1)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} + 76 T^{2} + 676)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 24 T^{2} + 132)^{2} \) Copy content Toggle raw display
$47$ \( (T^{4} - 48 T^{2} + 528)^{2} \) Copy content Toggle raw display
$53$ \( (T^{4} + 124 T^{2} + 2116)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} - 48 T^{2} + 528)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + 8 T + 13)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 24 T^{2} + 132)^{2} \) Copy content Toggle raw display
$71$ \( (T^{4} - 108 T^{2} + 1188)^{2} \) Copy content Toggle raw display
$73$ \( (T^{2} + 8 T - 59)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} + 120 T^{2} + 132)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} - 144 T^{2} + 2112)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} + 196 T^{2} + 2401)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} + 8 T + 4)^{4} \) Copy content Toggle raw display
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