Properties

Label 405.2.m.a
Level $405$
Weight $2$
Character orbit 405.m
Analytic conductor $3.234$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [405,2,Mod(53,405)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(405, base_ring=CyclotomicField(12))
 
chi = DirichletCharacter(H, H._module([10, 9]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("405.53");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 405 = 3^{4} \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 405.m (of order \(12\), degree \(4\), 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: \(3.23394128186\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(2\) over \(\Q(\zeta_{12})\)
Coefficient field: \(\Q(\zeta_{24})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{4} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 45)
Sato-Tate group: $\mathrm{SU}(2)[C_{12}]$

$q$-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 primitive root of unity \(\zeta_{24}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \zeta_{24}^{7} q^{2} + \zeta_{24}^{2} q^{4} + (\zeta_{24}^{7} + \cdots - \zeta_{24}^{3}) q^{5}+ \cdots + (3 \zeta_{24}^{5} - 3 \zeta_{24}) q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q + \zeta_{24}^{7} q^{2} + \zeta_{24}^{2} q^{4} + (\zeta_{24}^{7} + \cdots - \zeta_{24}^{3}) q^{5}+ \cdots + (\zeta_{24}^{5} - \zeta_{24}) q^{98}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 8 q^{7}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 8 q^{7} - 16 q^{10} - 4 q^{13} - 4 q^{16} - 8 q^{22} - 16 q^{25} + 16 q^{28} + 16 q^{31} + 8 q^{37} + 12 q^{40} + 32 q^{43} - 32 q^{46} - 4 q^{52} + 16 q^{55} - 12 q^{58} - 32 q^{61} - 16 q^{67} - 24 q^{70} + 8 q^{73} - 8 q^{82} + 32 q^{85} + 24 q^{88} - 32 q^{91} + 44 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/405\mathbb{Z}\right)^\times\).

\(n\) \(82\) \(326\)
\(\chi(n)\) \(-\zeta_{24}^{6}\) \(1 - \zeta_{24}^{4}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
53.1
0.965926 + 0.258819i
−0.965926 0.258819i
0.965926 0.258819i
−0.965926 + 0.258819i
0.258819 + 0.965926i
−0.258819 0.965926i
0.258819 0.965926i
−0.258819 + 0.965926i
−0.258819 + 0.965926i 0 0.866025 + 0.500000i −0.448288 + 2.19067i 0 2.73205 + 0.732051i −2.12132 + 2.12132i 0 −2.00000 1.00000i
53.2 0.258819 0.965926i 0 0.866025 + 0.500000i 0.448288 2.19067i 0 2.73205 + 0.732051i 2.12132 2.12132i 0 −2.00000 1.00000i
107.1 −0.258819 0.965926i 0 0.866025 0.500000i −0.448288 2.19067i 0 2.73205 0.732051i −2.12132 2.12132i 0 −2.00000 + 1.00000i
107.2 0.258819 + 0.965926i 0 0.866025 0.500000i 0.448288 + 2.19067i 0 2.73205 0.732051i 2.12132 + 2.12132i 0 −2.00000 + 1.00000i
188.1 −0.965926 + 0.258819i 0 −0.866025 + 0.500000i 1.67303 + 1.48356i 0 −0.732051 2.73205i 2.12132 2.12132i 0 −2.00000 1.00000i
188.2 0.965926 0.258819i 0 −0.866025 + 0.500000i −1.67303 1.48356i 0 −0.732051 2.73205i −2.12132 + 2.12132i 0 −2.00000 1.00000i
377.1 −0.965926 0.258819i 0 −0.866025 0.500000i 1.67303 1.48356i 0 −0.732051 + 2.73205i 2.12132 + 2.12132i 0 −2.00000 + 1.00000i
377.2 0.965926 + 0.258819i 0 −0.866025 0.500000i −1.67303 + 1.48356i 0 −0.732051 + 2.73205i −2.12132 2.12132i 0 −2.00000 + 1.00000i
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 53.2
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
3.b odd 2 1 inner
5.c odd 4 1 inner
9.c even 3 1 inner
9.d odd 6 1 inner
15.e even 4 1 inner
45.k odd 12 1 inner
45.l even 12 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 405.2.m.a 8
3.b odd 2 1 inner 405.2.m.a 8
5.c odd 4 1 inner 405.2.m.a 8
9.c even 3 1 45.2.f.a 4
9.c even 3 1 inner 405.2.m.a 8
9.d odd 6 1 45.2.f.a 4
9.d odd 6 1 inner 405.2.m.a 8
15.e even 4 1 inner 405.2.m.a 8
36.f odd 6 1 720.2.w.d 4
36.h even 6 1 720.2.w.d 4
45.h odd 6 1 225.2.f.a 4
45.j even 6 1 225.2.f.a 4
45.k odd 12 1 45.2.f.a 4
45.k odd 12 1 225.2.f.a 4
45.k odd 12 1 inner 405.2.m.a 8
45.l even 12 1 45.2.f.a 4
45.l even 12 1 225.2.f.a 4
45.l even 12 1 inner 405.2.m.a 8
72.j odd 6 1 2880.2.w.b 4
72.l even 6 1 2880.2.w.k 4
72.n even 6 1 2880.2.w.b 4
72.p odd 6 1 2880.2.w.k 4
180.n even 6 1 3600.2.w.b 4
180.p odd 6 1 3600.2.w.b 4
180.v odd 12 1 720.2.w.d 4
180.v odd 12 1 3600.2.w.b 4
180.x even 12 1 720.2.w.d 4
180.x even 12 1 3600.2.w.b 4
360.bo even 12 1 2880.2.w.k 4
360.br even 12 1 2880.2.w.b 4
360.bt odd 12 1 2880.2.w.k 4
360.bu odd 12 1 2880.2.w.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
45.2.f.a 4 9.c even 3 1
45.2.f.a 4 9.d odd 6 1
45.2.f.a 4 45.k odd 12 1
45.2.f.a 4 45.l even 12 1
225.2.f.a 4 45.h odd 6 1
225.2.f.a 4 45.j even 6 1
225.2.f.a 4 45.k odd 12 1
225.2.f.a 4 45.l even 12 1
405.2.m.a 8 1.a even 1 1 trivial
405.2.m.a 8 3.b odd 2 1 inner
405.2.m.a 8 5.c odd 4 1 inner
405.2.m.a 8 9.c even 3 1 inner
405.2.m.a 8 9.d odd 6 1 inner
405.2.m.a 8 15.e even 4 1 inner
405.2.m.a 8 45.k odd 12 1 inner
405.2.m.a 8 45.l even 12 1 inner
720.2.w.d 4 36.f odd 6 1
720.2.w.d 4 36.h even 6 1
720.2.w.d 4 180.v odd 12 1
720.2.w.d 4 180.x even 12 1
2880.2.w.b 4 72.j odd 6 1
2880.2.w.b 4 72.n even 6 1
2880.2.w.b 4 360.br even 12 1
2880.2.w.b 4 360.bu odd 12 1
2880.2.w.k 4 72.l even 6 1
2880.2.w.k 4 72.p odd 6 1
2880.2.w.k 4 360.bo even 12 1
2880.2.w.k 4 360.bt odd 12 1
3600.2.w.b 4 180.n even 6 1
3600.2.w.b 4 180.p odd 6 1
3600.2.w.b 4 180.v odd 12 1
3600.2.w.b 4 180.x even 12 1

Hecke kernels

This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{8} - T_{2}^{4} + 1 \) acting on \(S_{2}^{\mathrm{new}}(405, [\chi])\). Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} - T^{4} + 1 \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} + 8 T^{6} + \cdots + 625 \) Copy content Toggle raw display
$7$ \( (T^{4} - 4 T^{3} + 8 T^{2} + \cdots + 64)^{2} \) Copy content Toggle raw display
$11$ \( (T^{4} - 8 T^{2} + 64)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 2 T^{3} + 2 T^{2} + \cdots + 4)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} + 256)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} - 256 T^{4} + 65536 \) Copy content Toggle raw display
$29$ \( (T^{4} + 18 T^{2} + 324)^{2} \) Copy content Toggle raw display
$31$ \( (T^{2} - 4 T + 16)^{4} \) Copy content Toggle raw display
$37$ \( (T^{2} - 2 T + 2)^{4} \) Copy content Toggle raw display
$41$ \( (T^{4} - 2 T^{2} + 4)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} - 16 T^{3} + \cdots + 16384)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} - 4096 T^{4} + 16777216 \) Copy content Toggle raw display
$53$ \( (T^{4} + 256)^{2} \) Copy content Toggle raw display
$59$ \( (T^{4} + 72 T^{2} + 5184)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} + 8 T + 64)^{4} \) Copy content Toggle raw display
$67$ \( (T^{4} + 8 T^{3} + \cdots + 1024)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} + 32)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} - 2 T + 2)^{4} \) Copy content Toggle raw display
$79$ \( (T^{4} - 144 T^{2} + 20736)^{2} \) Copy content Toggle raw display
$83$ \( T^{8} - 256 T^{4} + 65536 \) Copy content Toggle raw display
$89$ \( (T^{2} - 162)^{4} \) Copy content Toggle raw display
$97$ \( (T^{4} - 22 T^{3} + \cdots + 58564)^{2} \) Copy content Toggle raw display
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