Properties

Label 648.2.i.b
Level $648$
Weight $2$
Character orbit 648.i
Analytic conductor $5.174$
Analytic rank $0$
Dimension $2$
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [648,2,Mod(217,648)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(648, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 0, 4]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("648.217");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 648 = 2^{3} \cdot 3^{4} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 648.i (of order \(3\), 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: \(5.17430605098\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-3}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} - x + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{25}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 24)
Sato-Tate group: $\mathrm{SU}(2)[C_{3}]$

$q$-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 \(\zeta_{6}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - 2 \zeta_{6} q^{5} +O(q^{10}) \) Copy content Toggle raw display \( q - 2 \zeta_{6} q^{5} + ( - 4 \zeta_{6} + 4) q^{11} + 2 \zeta_{6} q^{13} - 2 q^{17} - 4 q^{19} - 8 \zeta_{6} q^{23} + ( - \zeta_{6} + 1) q^{25} + ( - 6 \zeta_{6} + 6) q^{29} - 8 \zeta_{6} q^{31} + 6 q^{37} - 6 \zeta_{6} q^{41} + (4 \zeta_{6} - 4) q^{43} + 7 \zeta_{6} q^{49} + 2 q^{53} - 8 q^{55} + 4 \zeta_{6} q^{59} + ( - 2 \zeta_{6} + 2) q^{61} + ( - 4 \zeta_{6} + 4) q^{65} + 4 \zeta_{6} q^{67} - 8 q^{71} + 10 q^{73} + ( - 8 \zeta_{6} + 8) q^{79} + (4 \zeta_{6} - 4) q^{83} + 4 \zeta_{6} q^{85} + 6 q^{89} + 8 \zeta_{6} q^{95} + (2 \zeta_{6} - 2) q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{5} + 4 q^{11} + 2 q^{13} - 4 q^{17} - 8 q^{19} - 8 q^{23} + q^{25} + 6 q^{29} - 8 q^{31} + 12 q^{37} - 6 q^{41} - 4 q^{43} + 7 q^{49} + 4 q^{53} - 16 q^{55} + 4 q^{59} + 2 q^{61} + 4 q^{65} + 4 q^{67} - 16 q^{71} + 20 q^{73} + 8 q^{79} - 4 q^{83} + 4 q^{85} + 12 q^{89} + 8 q^{95} - 2 q^{97}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/648\mathbb{Z}\right)^\times\).

\(n\) \(325\) \(487\) \(569\)
\(\chi(n)\) \(1\) \(1\) \(-\zeta_{6}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
217.1
0.500000 + 0.866025i
0.500000 0.866025i
0 0 0 −1.00000 1.73205i 0 0 0 0 0
433.1 0 0 0 −1.00000 + 1.73205i 0 0 0 0 0
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
9.c even 3 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 648.2.i.b 2
3.b odd 2 1 648.2.i.g 2
4.b odd 2 1 1296.2.i.e 2
9.c even 3 1 72.2.a.a 1
9.c even 3 1 inner 648.2.i.b 2
9.d odd 6 1 24.2.a.a 1
9.d odd 6 1 648.2.i.g 2
12.b even 2 1 1296.2.i.m 2
36.f odd 6 1 144.2.a.b 1
36.f odd 6 1 1296.2.i.e 2
36.h even 6 1 48.2.a.a 1
36.h even 6 1 1296.2.i.m 2
45.h odd 6 1 600.2.a.h 1
45.j even 6 1 1800.2.a.m 1
45.k odd 12 2 1800.2.f.c 2
45.l even 12 2 600.2.f.e 2
63.g even 3 1 3528.2.s.j 2
63.h even 3 1 3528.2.s.j 2
63.i even 6 1 1176.2.q.a 2
63.j odd 6 1 1176.2.q.i 2
63.k odd 6 1 3528.2.s.y 2
63.l odd 6 1 3528.2.a.d 1
63.n odd 6 1 1176.2.q.i 2
63.o even 6 1 1176.2.a.i 1
63.s even 6 1 1176.2.q.a 2
63.t odd 6 1 3528.2.s.y 2
72.j odd 6 1 192.2.a.d 1
72.l even 6 1 192.2.a.b 1
72.n even 6 1 576.2.a.d 1
72.p odd 6 1 576.2.a.b 1
99.g even 6 1 2904.2.a.c 1
99.h odd 6 1 8712.2.a.u 1
117.n odd 6 1 4056.2.a.i 1
117.z even 12 2 4056.2.c.e 2
144.u even 12 2 768.2.d.d 2
144.v odd 12 2 2304.2.d.k 2
144.w odd 12 2 768.2.d.e 2
144.x even 12 2 2304.2.d.i 2
153.i odd 6 1 6936.2.a.p 1
171.l even 6 1 8664.2.a.j 1
180.n even 6 1 1200.2.a.d 1
180.p odd 6 1 3600.2.a.v 1
180.v odd 12 2 1200.2.f.b 2
180.x even 12 2 3600.2.f.r 2
252.o even 6 1 2352.2.q.l 2
252.r odd 6 1 2352.2.q.r 2
252.s odd 6 1 2352.2.a.i 1
252.bb even 6 1 2352.2.q.l 2
252.bi even 6 1 7056.2.a.q 1
252.bn odd 6 1 2352.2.q.r 2
360.bd even 6 1 4800.2.a.cc 1
360.bh odd 6 1 4800.2.a.q 1
360.br even 12 2 4800.2.f.d 2
360.bt odd 12 2 4800.2.f.bg 2
396.o odd 6 1 5808.2.a.s 1
468.x even 6 1 8112.2.a.be 1
504.cc even 6 1 9408.2.a.h 1
504.co odd 6 1 9408.2.a.cc 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
24.2.a.a 1 9.d odd 6 1
48.2.a.a 1 36.h even 6 1
72.2.a.a 1 9.c even 3 1
144.2.a.b 1 36.f odd 6 1
192.2.a.b 1 72.l even 6 1
192.2.a.d 1 72.j odd 6 1
576.2.a.b 1 72.p odd 6 1
576.2.a.d 1 72.n even 6 1
600.2.a.h 1 45.h odd 6 1
600.2.f.e 2 45.l even 12 2
648.2.i.b 2 1.a even 1 1 trivial
648.2.i.b 2 9.c even 3 1 inner
648.2.i.g 2 3.b odd 2 1
648.2.i.g 2 9.d odd 6 1
768.2.d.d 2 144.u even 12 2
768.2.d.e 2 144.w odd 12 2
1176.2.a.i 1 63.o even 6 1
1176.2.q.a 2 63.i even 6 1
1176.2.q.a 2 63.s even 6 1
1176.2.q.i 2 63.j odd 6 1
1176.2.q.i 2 63.n odd 6 1
1200.2.a.d 1 180.n even 6 1
1200.2.f.b 2 180.v odd 12 2
1296.2.i.e 2 4.b odd 2 1
1296.2.i.e 2 36.f odd 6 1
1296.2.i.m 2 12.b even 2 1
1296.2.i.m 2 36.h even 6 1
1800.2.a.m 1 45.j even 6 1
1800.2.f.c 2 45.k odd 12 2
2304.2.d.i 2 144.x even 12 2
2304.2.d.k 2 144.v odd 12 2
2352.2.a.i 1 252.s odd 6 1
2352.2.q.l 2 252.o even 6 1
2352.2.q.l 2 252.bb even 6 1
2352.2.q.r 2 252.r odd 6 1
2352.2.q.r 2 252.bn odd 6 1
2904.2.a.c 1 99.g even 6 1
3528.2.a.d 1 63.l odd 6 1
3528.2.s.j 2 63.g even 3 1
3528.2.s.j 2 63.h even 3 1
3528.2.s.y 2 63.k odd 6 1
3528.2.s.y 2 63.t odd 6 1
3600.2.a.v 1 180.p odd 6 1
3600.2.f.r 2 180.x even 12 2
4056.2.a.i 1 117.n odd 6 1
4056.2.c.e 2 117.z even 12 2
4800.2.a.q 1 360.bh odd 6 1
4800.2.a.cc 1 360.bd even 6 1
4800.2.f.d 2 360.br even 12 2
4800.2.f.bg 2 360.bt odd 12 2
5808.2.a.s 1 396.o odd 6 1
6936.2.a.p 1 153.i odd 6 1
7056.2.a.q 1 252.bi even 6 1
8112.2.a.be 1 468.x even 6 1
8664.2.a.j 1 171.l even 6 1
8712.2.a.u 1 99.h odd 6 1
9408.2.a.h 1 504.cc even 6 1
9408.2.a.cc 1 504.co odd 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(648, [\chi])\):

\( T_{5}^{2} + 2T_{5} + 4 \) Copy content Toggle raw display
\( T_{7} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} + 2T + 4 \) Copy content Toggle raw display
$7$ \( T^{2} \) Copy content Toggle raw display
$11$ \( T^{2} - 4T + 16 \) Copy content Toggle raw display
$13$ \( T^{2} - 2T + 4 \) Copy content Toggle raw display
$17$ \( (T + 2)^{2} \) Copy content Toggle raw display
$19$ \( (T + 4)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 8T + 64 \) Copy content Toggle raw display
$29$ \( T^{2} - 6T + 36 \) Copy content Toggle raw display
$31$ \( T^{2} + 8T + 64 \) Copy content Toggle raw display
$37$ \( (T - 6)^{2} \) Copy content Toggle raw display
$41$ \( T^{2} + 6T + 36 \) Copy content Toggle raw display
$43$ \( T^{2} + 4T + 16 \) Copy content Toggle raw display
$47$ \( T^{2} \) Copy content Toggle raw display
$53$ \( (T - 2)^{2} \) Copy content Toggle raw display
$59$ \( T^{2} - 4T + 16 \) Copy content Toggle raw display
$61$ \( T^{2} - 2T + 4 \) Copy content Toggle raw display
$67$ \( T^{2} - 4T + 16 \) Copy content Toggle raw display
$71$ \( (T + 8)^{2} \) Copy content Toggle raw display
$73$ \( (T - 10)^{2} \) Copy content Toggle raw display
$79$ \( T^{2} - 8T + 64 \) Copy content Toggle raw display
$83$ \( T^{2} + 4T + 16 \) Copy content Toggle raw display
$89$ \( (T - 6)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} + 2T + 4 \) Copy content Toggle raw display
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