Properties

Label 540.2.n.c
Level $540$
Weight $2$
Character orbit 540.n
Analytic conductor $4.312$
Analytic rank $0$
Dimension $8$
CM discriminant -20
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [540,2,Mod(179,540)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(540, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([3, 5, 3]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("540.179");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 540 = 2^{2} \cdot 3^{3} \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 540.n (of order \(6\), degree \(2\), not minimal)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(4.31192170915\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{6})\)
Coefficient field: 8.0.3317760000.8
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} + 4x^{6} + 7x^{4} + 36x^{2} + 81 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 180)
Sato-Tate group: $\mathrm{U}(1)[D_{6}]$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
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.

\(f(q)\) \(=\) \( q + (\beta_{5} + \beta_{4}) q^{2} + ( - 2 \beta_{3} + 2) q^{4} + \beta_{6} q^{5} + ( - \beta_{5} + 2 \beta_{4} + \beta_1) q^{7} + 2 \beta_{4} q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + (\beta_{5} + \beta_{4}) q^{2} + ( - 2 \beta_{3} + 2) q^{4} + \beta_{6} q^{5} + ( - \beta_{5} + 2 \beta_{4} + \beta_1) q^{7} + 2 \beta_{4} q^{8} + ( - 2 \beta_{7} - 2 \beta_{5} + \cdots - 2 \beta_1) q^{10}+ \cdots + (6 \beta_{7} - 12 \beta_{4} - 6 \beta_1) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{4}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{4} - 36 q^{14} - 16 q^{16} + 20 q^{25} + 36 q^{29} + 72 q^{41} - 8 q^{46} - 36 q^{49} - 72 q^{56} + 16 q^{61} - 64 q^{64} - 20 q^{70} + 28 q^{94}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} + 4x^{6} + 7x^{4} + 36x^{2} + 81 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( \nu \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -\nu^{6} + 14\nu^{4} - 7\nu^{2} - 36 ) / 63 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 4\nu^{6} + 7\nu^{4} + 28\nu^{2} + 144 ) / 63 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( -4\nu^{7} - 7\nu^{5} + 35\nu^{3} - 81\nu ) / 189 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -5\nu^{7} + 7\nu^{5} - 35\nu^{3} - 180\nu ) / 189 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -8\nu^{6} - 14\nu^{4} + 7\nu^{2} - 162 ) / 63 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -\nu^{7} - 4\nu^{5} - 7\nu^{3} - 36\nu ) / 27 \) Copy content Toggle raw display
\(\nu\)\(=\) \( \beta_1 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( \beta_{6} + 2\beta_{3} - 2 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( -\beta_{7} - \beta_{5} + 3\beta_{4} - \beta_1 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( \beta_{3} + 4\beta_{2} \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( -5\beta_{7} + 7\beta_{5} \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( -7\beta_{6} - 7\beta_{2} - 22 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( -21\beta_{5} - 21\beta_{4} - 29\beta_1 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/540\mathbb{Z}\right)^\times\).

\(n\) \(217\) \(271\) \(461\)
\(\chi(n)\) \(-1\) \(-1\) \(1 - \beta_{3}\)

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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
179.1
−0.178197 1.72286i
1.40294 + 1.01575i
0.178197 + 1.72286i
−1.40294 1.01575i
−0.178197 + 1.72286i
1.40294 1.01575i
0.178197 1.72286i
−1.40294 + 1.01575i
−1.22474 + 0.707107i 0 1.00000 1.73205i −1.93649 1.11803i 0 1.04655 + 1.81267i 2.82843i 0 3.16228
179.2 −1.22474 + 0.707107i 0 1.00000 1.73205i 1.93649 + 1.11803i 0 2.62769 + 4.55129i 2.82843i 0 −3.16228
179.3 1.22474 0.707107i 0 1.00000 1.73205i −1.93649 1.11803i 0 −1.04655 1.81267i 2.82843i 0 −3.16228
179.4 1.22474 0.707107i 0 1.00000 1.73205i 1.93649 + 1.11803i 0 −2.62769 4.55129i 2.82843i 0 3.16228
359.1 −1.22474 0.707107i 0 1.00000 + 1.73205i −1.93649 + 1.11803i 0 1.04655 1.81267i 2.82843i 0 3.16228
359.2 −1.22474 0.707107i 0 1.00000 + 1.73205i 1.93649 1.11803i 0 2.62769 4.55129i 2.82843i 0 −3.16228
359.3 1.22474 + 0.707107i 0 1.00000 + 1.73205i −1.93649 + 1.11803i 0 −1.04655 + 1.81267i 2.82843i 0 −3.16228
359.4 1.22474 + 0.707107i 0 1.00000 + 1.73205i 1.93649 1.11803i 0 −2.62769 + 4.55129i 2.82843i 0 3.16228
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 179.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
20.d odd 2 1 CM by \(\Q(\sqrt{-5}) \)
4.b odd 2 1 inner
5.b even 2 1 inner
9.d odd 6 1 inner
36.h even 6 1 inner
45.h odd 6 1 inner
180.n even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 540.2.n.c 8
3.b odd 2 1 180.2.n.c 8
4.b odd 2 1 inner 540.2.n.c 8
5.b even 2 1 inner 540.2.n.c 8
9.c even 3 1 180.2.n.c 8
9.d odd 6 1 inner 540.2.n.c 8
12.b even 2 1 180.2.n.c 8
15.d odd 2 1 180.2.n.c 8
15.e even 4 2 900.2.r.a 8
20.d odd 2 1 CM 540.2.n.c 8
36.f odd 6 1 180.2.n.c 8
36.h even 6 1 inner 540.2.n.c 8
45.h odd 6 1 inner 540.2.n.c 8
45.j even 6 1 180.2.n.c 8
45.k odd 12 2 900.2.r.a 8
60.h even 2 1 180.2.n.c 8
60.l odd 4 2 900.2.r.a 8
180.n even 6 1 inner 540.2.n.c 8
180.p odd 6 1 180.2.n.c 8
180.x even 12 2 900.2.r.a 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
180.2.n.c 8 3.b odd 2 1
180.2.n.c 8 9.c even 3 1
180.2.n.c 8 12.b even 2 1
180.2.n.c 8 15.d odd 2 1
180.2.n.c 8 36.f odd 6 1
180.2.n.c 8 45.j even 6 1
180.2.n.c 8 60.h even 2 1
180.2.n.c 8 180.p odd 6 1
540.2.n.c 8 1.a even 1 1 trivial
540.2.n.c 8 4.b odd 2 1 inner
540.2.n.c 8 5.b even 2 1 inner
540.2.n.c 8 9.d odd 6 1 inner
540.2.n.c 8 20.d odd 2 1 CM
540.2.n.c 8 36.h even 6 1 inner
540.2.n.c 8 45.h odd 6 1 inner
540.2.n.c 8 180.n even 6 1 inner
900.2.r.a 8 15.e even 4 2
900.2.r.a 8 45.k odd 12 2
900.2.r.a 8 60.l odd 4 2
900.2.r.a 8 180.x even 12 2

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{7}^{8} + 32T_{7}^{6} + 903T_{7}^{4} + 3872T_{7}^{2} + 14641 \) acting on \(S_{2}^{\mathrm{new}}(540, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{4} - 2 T^{2} + 4)^{2} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( (T^{4} - 5 T^{2} + 25)^{2} \) Copy content Toggle raw display
$7$ \( T^{8} + 32 T^{6} + \cdots + 14641 \) Copy content Toggle raw display
$11$ \( T^{8} \) Copy content Toggle raw display
$13$ \( T^{8} \) Copy content Toggle raw display
$17$ \( T^{8} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} - 136 T^{6} + \cdots + 20151121 \) Copy content Toggle raw display
$29$ \( (T^{4} - 18 T^{3} + \cdots + 49)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( (T^{4} - 36 T^{3} + \cdots + 10609)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} + 10 T^{2} + 100)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} - 184 T^{6} + \cdots + 3418801 \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( (T^{4} - 8 T^{3} + \cdots + 14161)^{2} \) Copy content Toggle raw display
$67$ \( T^{8} + 152 T^{6} + \cdots + 5764801 \) Copy content Toggle raw display
$71$ \( T^{8} \) Copy content Toggle raw display
$73$ \( T^{8} \) Copy content Toggle raw display
$79$ \( T^{8} \) Copy content Toggle raw display
$83$ \( T^{8} - 256 T^{6} + \cdots + 2401 \) Copy content Toggle raw display
$89$ \( (T^{4} + 214 T^{2} + 2809)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} \) Copy content Toggle raw display
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