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Properties

Label 2646.2.f.q
Level $2646$
Weight $2$
Character orbit 2646.f
Analytic conductor $21.128$
Analytic rank $0$
Dimension $8$
CM no
Inner twists $4$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2646,2,Mod(883,2646)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2646, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([4, 0]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2646.883");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2646 = 2 \cdot 3^{3} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2646.f (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: \(21.1284163748\)
Analytic rank: \(0\)
Dimension: \(8\)
Relative dimension: \(4\) over \(\Q(\zeta_{3})\)
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: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 3^{2} \)
Twist minimal: no (minimal twist has level 882)
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 basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_1 q^{2} + (\beta_1 - 1) q^{4} - \beta_{7} q^{5} + q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_1 q^{2} + (\beta_1 - 1) q^{4} - \beta_{7} q^{5} + q^{8} + (\beta_{6} + \beta_{5}) q^{10} + (2 \beta_{2} + 2 \beta_1) q^{11} + ( - 2 \beta_{7} + \beta_{5} - \beta_{3}) q^{13} - \beta_1 q^{16} + ( - 4 \beta_{6} - 3 \beta_{5}) q^{17} + ( - \beta_{6} - \beta_{5}) q^{19} + (\beta_{7} - \beta_{6} - \beta_{5}) q^{20} + (2 \beta_{4} - 2 \beta_{2} - 2 \beta_1 + 2) q^{22} + ( - 4 \beta_{4} + 4 \beta_{2} + \cdots + 1) q^{23}+ \cdots + (2 \beta_{7} - 2 \beta_{6} - 2 \beta_{5}) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q - 4 q^{2} - 4 q^{4} + 8 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 8 q - 4 q^{2} - 4 q^{4} + 8 q^{8} + 8 q^{11} - 4 q^{16} + 8 q^{22} + 4 q^{23} + 12 q^{25} + 4 q^{29} - 4 q^{32} - 64 q^{37} + 28 q^{43} - 16 q^{44} - 8 q^{46} + 12 q^{50} - 40 q^{53} + 4 q^{58} + 8 q^{64} - 12 q^{65} + 36 q^{67} + 48 q^{71} + 32 q^{74} - 8 q^{79} + 28 q^{85} + 28 q^{86} + 8 q^{88} + 4 q^{92} + 8 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Basis of coefficient ring

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

Display \(\zeta_{24}^j\) in terms of \(\beta_i\)

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

Display \(\beta_i\) in terms of \(\zeta_{24}^j\)

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2646\mathbb{Z}\right)^\times\).

\(n\) \(785\) \(1081\)
\(\chi(n)\) \(-1 + \beta_{1}\) \(1\)

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.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
883.1
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
−0.500000 + 0.866025i 0 −0.500000 − 0.866025i −0.965926 − 1.67303i 0 0 1.00000 0 1.93185
883.2 −0.500000 + 0.866025i 0 −0.500000 − 0.866025i −0.258819 − 0.448288i 0 0 1.00000 0 0.517638
883.3 −0.500000 + 0.866025i 0 −0.500000 − 0.866025i 0.258819 + 0.448288i 0 0 1.00000 0 −0.517638
883.4 −0.500000 + 0.866025i 0 −0.500000 − 0.866025i 0.965926 + 1.67303i 0 0 1.00000 0 −1.93185
1765.1 −0.500000 − 0.866025i 0 −0.500000 + 0.866025i −0.965926 + 1.67303i 0 0 1.00000 0 1.93185
1765.2 −0.500000 − 0.866025i 0 −0.500000 + 0.866025i −0.258819 + 0.448288i 0 0 1.00000 0 0.517638
1765.3 −0.500000 − 0.866025i 0 −0.500000 + 0.866025i 0.258819 − 0.448288i 0 0 1.00000 0 −0.517638
1765.4 −0.500000 − 0.866025i 0 −0.500000 + 0.866025i 0.965926 − 1.67303i 0 0 1.00000 0 −1.93185
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 883.4
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
7.b odd 2 1 inner
9.c even 3 1 inner
63.l odd 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2646.2.f.q 8
3.b odd 2 1 882.2.f.s ✓ 8
7.b odd 2 1 inner 2646.2.f.q 8
7.c even 3 1 2646.2.e.t 8
7.c even 3 1 2646.2.h.q 8
7.d odd 6 1 2646.2.e.t 8
7.d odd 6 1 2646.2.h.q 8
9.c even 3 1 inner 2646.2.f.q 8
9.c even 3 1 7938.2.a.co 4
9.d odd 6 1 882.2.f.s ✓ 8
9.d odd 6 1 7938.2.a.cj 4
21.c even 2 1 882.2.f.s ✓ 8
21.g even 6 1 882.2.e.q 8
21.g even 6 1 882.2.h.t 8
21.h odd 6 1 882.2.e.q 8
21.h odd 6 1 882.2.h.t 8
63.g even 3 1 2646.2.e.t 8
63.h even 3 1 2646.2.h.q 8
63.i even 6 1 882.2.h.t 8
63.j odd 6 1 882.2.h.t 8
63.k odd 6 1 2646.2.e.t 8
63.l odd 6 1 inner 2646.2.f.q 8
63.l odd 6 1 7938.2.a.co 4
63.n odd 6 1 882.2.e.q 8
63.o even 6 1 882.2.f.s ✓ 8
63.o even 6 1 7938.2.a.cj 4
63.s even 6 1 882.2.e.q 8
63.t odd 6 1 2646.2.h.q 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
882.2.e.q 8 21.g even 6 1
882.2.e.q 8 21.h odd 6 1
882.2.e.q 8 63.n odd 6 1
882.2.e.q 8 63.s even 6 1
882.2.f.s ✓ 8 3.b odd 2 1
882.2.f.s ✓ 8 9.d odd 6 1
882.2.f.s ✓ 8 21.c even 2 1
882.2.f.s ✓ 8 63.o even 6 1
882.2.h.t 8 21.g even 6 1
882.2.h.t 8 21.h odd 6 1
882.2.h.t 8 63.i even 6 1
882.2.h.t 8 63.j odd 6 1
2646.2.e.t 8 7.c even 3 1
2646.2.e.t 8 7.d odd 6 1
2646.2.e.t 8 63.g even 3 1
2646.2.e.t 8 63.k odd 6 1
2646.2.f.q 8 1.a even 1 1 trivial
2646.2.f.q 8 7.b odd 2 1 inner
2646.2.f.q 8 9.c even 3 1 inner
2646.2.f.q 8 63.l odd 6 1 inner
2646.2.h.q 8 7.c even 3 1
2646.2.h.q 8 7.d odd 6 1
2646.2.h.q 8 63.h even 3 1
2646.2.h.q 8 63.t odd 6 1
7938.2.a.cj 4 9.d odd 6 1
7938.2.a.cj 4 63.o even 6 1
7938.2.a.co 4 9.c even 3 1
7938.2.a.co 4 63.l odd 6 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2646, [\chi])\):

\( T_{5}^{8} + 4T_{5}^{6} + 15T_{5}^{4} + 4T_{5}^{2} + 1 \) Copy content Toggle raw display
\( T_{11}^{4} - 4T_{11}^{3} + 24T_{11}^{2} + 32T_{11} + 64 \) Copy content Toggle raw display
\( T_{13}^{4} + 6T_{13}^{2} + 36 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{2} + T + 1)^{4} \) Copy content Toggle raw display
$3$ \( T^{8} \) Copy content Toggle raw display
$5$ \( T^{8} + 4 T^{6} + \cdots + 1 \) Copy content Toggle raw display
$7$ \( T^{8} \) Copy content Toggle raw display
$11$ \( (T^{4} - 4 T^{3} + 24 T^{2} + \cdots + 64)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 6 T^{2} + 36)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} - 52 T^{2} + 484)^{2} \) Copy content Toggle raw display
$19$ \( (T^{4} - 4 T^{2} + 1)^{2} \) Copy content Toggle raw display
$23$ \( (T^{4} - 2 T^{3} + \cdots + 2209)^{2} \) Copy content Toggle raw display
$29$ \( (T^{4} - 2 T^{3} + 6 T^{2} + \cdots + 4)^{2} \) Copy content Toggle raw display
$31$ \( (T^{4} + 54 T^{2} + 2916)^{2} \) Copy content Toggle raw display
$37$ \( (T + 8)^{8} \) Copy content Toggle raw display
$41$ \( (T^{4} + 32 T^{2} + 1024)^{2} \) Copy content Toggle raw display
$43$ \( (T^{4} - 14 T^{3} + \cdots + 484)^{2} \) Copy content Toggle raw display
$47$ \( T^{8} + 112 T^{6} + \cdots + 3748096 \) Copy content Toggle raw display
$53$ \( (T^{2} + 10 T + 22)^{4} \) Copy content Toggle raw display
$59$ \( T^{8} + 244 T^{6} + \cdots + 29986576 \) Copy content Toggle raw display
$61$ \( T^{8} + 28 T^{6} + \cdots + 28561 \) Copy content Toggle raw display
$67$ \( (T^{4} - 18 T^{3} + \cdots + 2916)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} - 12 T + 9)^{4} \) Copy content Toggle raw display
$73$ \( (T^{4} - 112 T^{2} + 1936)^{2} \) Copy content Toggle raw display
$79$ \( (T^{4} + 4 T^{3} + \cdots + 20449)^{2} \) Copy content Toggle raw display
$83$ \( (T^{4} + 98 T^{2} + 9604)^{2} \) Copy content Toggle raw display
$89$ \( (T^{4} - 436 T^{2} + 45796)^{2} \) Copy content Toggle raw display
$97$ \( T^{8} + 16 T^{6} + \cdots + 256 \) Copy content Toggle raw display
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