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Properties

Label 2646.2.f.k
Level $2646$
Weight $2$
Character orbit 2646.f
Analytic conductor $21.128$
Analytic rank $0$
Dimension $4$
Inner twists $2$

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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: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{3})\)
Coefficient field: \(\Q(\sqrt{-2}, \sqrt{-3})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - 2x^{2} + 4 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{5}]\)
Coefficient ring index: \( 3 \)
Twist minimal: no (minimal twist has level 126)
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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + ( - \beta_1 + 1) q^{2} - \beta_1 q^{4} + (\beta_{2} - \beta_1) q^{5} - q^{8} + (\beta_{3} - 1) q^{10} + ( - 2 \beta_1 + 2) q^{11} + 2 \beta_{2} q^{13} + (\beta_1 - 1) q^{16} + 2 q^{17} + (\beta_{3} - 5) q^{19}+ \cdots + (2 \beta_{3} - 2 \beta_{2} + 2 \beta_1 - 2) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q + 2 q^{2} - 2 q^{4} - 2 q^{5} - 4 q^{8} - 4 q^{10} + 4 q^{11} - 2 q^{16} + 8 q^{17} - 20 q^{19} - 2 q^{20} - 4 q^{22} - 2 q^{23} - 4 q^{25} - 4 q^{29} + 12 q^{31} + 2 q^{32} + 4 q^{34} + 8 q^{37} - 10 q^{38}+ \cdots - 4 q^{97}+O(q^{100}) \) Copy content Toggle raw display

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

\(\beta_{1}\)\(=\) \( ( \nu^{2} ) / 2 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{3} + 2\nu ) / 2 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -\nu^{3} + 4\nu ) / 2 \) Copy content Toggle raw display

Display \(\nu^j\) in terms of \(\beta_i\)

\(\nu\)\(=\) \( ( \beta_{3} + \beta_{2} ) / 3 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( 2\beta_1 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -2\beta_{3} + 4\beta_{2} ) / 3 \) Copy content Toggle raw display

Display \(\beta_i\) in terms of \(\nu^j\)

Character values

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

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

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
−1.22474 − 0.707107i
1.22474 + 0.707107i
−1.22474 + 0.707107i
1.22474 − 0.707107i
0.500000 − 0.866025i 0 −0.500000 − 0.866025i −1.72474 − 2.98735i 0 0 −1.00000 0 −3.44949
883.2 0.500000 − 0.866025i 0 −0.500000 − 0.866025i 0.724745 + 1.25529i 0 0 −1.00000 0 1.44949
1765.1 0.500000 + 0.866025i 0 −0.500000 + 0.866025i −1.72474 + 2.98735i 0 0 −1.00000 0 −3.44949
1765.2 0.500000 + 0.866025i 0 −0.500000 + 0.866025i 0.724745 − 1.25529i 0 0 −1.00000 0 1.44949
\(n\): 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 2646.2.f.k 4
3.b odd 2 1 882.2.f.j 4
7.b odd 2 1 378.2.f.d 4
7.c even 3 1 2646.2.e.k 4
7.c even 3 1 2646.2.h.n 4
7.d odd 6 1 2646.2.e.l 4
7.d odd 6 1 2646.2.h.m 4
9.c even 3 1 inner 2646.2.f.k 4
9.c even 3 1 7938.2.a.bm 2
9.d odd 6 1 882.2.f.j 4
9.d odd 6 1 7938.2.a.bn 2
21.c even 2 1 126.2.f.c ✓ 4
21.g even 6 1 882.2.e.m 4
21.g even 6 1 882.2.h.k 4
21.h odd 6 1 882.2.e.n 4
21.h odd 6 1 882.2.h.l 4
28.d even 2 1 3024.2.r.e 4
63.g even 3 1 2646.2.e.k 4
63.h even 3 1 2646.2.h.n 4
63.i even 6 1 882.2.h.k 4
63.j odd 6 1 882.2.h.l 4
63.k odd 6 1 2646.2.e.l 4
63.l odd 6 1 378.2.f.d 4
63.l odd 6 1 1134.2.a.i 2
63.n odd 6 1 882.2.e.n 4
63.o even 6 1 126.2.f.c ✓ 4
63.o even 6 1 1134.2.a.p 2
63.s even 6 1 882.2.e.m 4
63.t odd 6 1 2646.2.h.m 4
84.h odd 2 1 1008.2.r.e 4
252.s odd 6 1 1008.2.r.e 4
252.s odd 6 1 9072.2.a.bk 2
252.bi even 6 1 3024.2.r.e 4
252.bi even 6 1 9072.2.a.bd 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
126.2.f.c ✓ 4 21.c even 2 1
126.2.f.c ✓ 4 63.o even 6 1
378.2.f.d 4 7.b odd 2 1
378.2.f.d 4 63.l odd 6 1
882.2.e.m 4 21.g even 6 1
882.2.e.m 4 63.s even 6 1
882.2.e.n 4 21.h odd 6 1
882.2.e.n 4 63.n odd 6 1
882.2.f.j 4 3.b odd 2 1
882.2.f.j 4 9.d odd 6 1
882.2.h.k 4 21.g even 6 1
882.2.h.k 4 63.i even 6 1
882.2.h.l 4 21.h odd 6 1
882.2.h.l 4 63.j odd 6 1
1008.2.r.e 4 84.h odd 2 1
1008.2.r.e 4 252.s odd 6 1
1134.2.a.i 2 63.l odd 6 1
1134.2.a.p 2 63.o even 6 1
2646.2.e.k 4 7.c even 3 1
2646.2.e.k 4 63.g even 3 1
2646.2.e.l 4 7.d odd 6 1
2646.2.e.l 4 63.k odd 6 1
2646.2.f.k 4 1.a even 1 1 trivial
2646.2.f.k 4 9.c even 3 1 inner
2646.2.h.m 4 7.d odd 6 1
2646.2.h.m 4 63.t odd 6 1
2646.2.h.n 4 7.c even 3 1
2646.2.h.n 4 63.h even 3 1
3024.2.r.e 4 28.d even 2 1
3024.2.r.e 4 252.bi even 6 1
7938.2.a.bm 2 9.c even 3 1
7938.2.a.bn 2 9.d odd 6 1
9072.2.a.bd 2 252.bi even 6 1
9072.2.a.bk 2 252.s odd 6 1

Hecke kernels

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

\( T_{5}^{4} + 2T_{5}^{3} + 9T_{5}^{2} - 10T_{5} + 25 \) Copy content Toggle raw display
\( T_{11}^{2} - 2T_{11} + 4 \) Copy content Toggle raw display
\( T_{13}^{4} + 24T_{13}^{2} + 576 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( (T^{2} - T + 1)^{2} \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} + 2 T^{3} + \cdots + 25 \) Copy content Toggle raw display
$7$ \( T^{4} \) Copy content Toggle raw display
$11$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$13$ \( T^{4} + 24T^{2} + 576 \) Copy content Toggle raw display
$17$ \( (T - 2)^{4} \) Copy content Toggle raw display
$19$ \( (T^{2} + 10 T + 19)^{2} \) Copy content Toggle raw display
$23$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} + 4 T^{3} + \cdots + 400 \) Copy content Toggle raw display
$31$ \( (T^{2} - 6 T + 36)^{2} \) Copy content Toggle raw display
$37$ \( (T^{2} - 4 T - 92)^{2} \) Copy content Toggle raw display
$41$ \( T^{4} + 96T^{2} + 9216 \) Copy content Toggle raw display
$43$ \( T^{4} + 4 T^{3} + \cdots + 400 \) Copy content Toggle raw display
$47$ \( T^{4} + 96T^{2} + 9216 \) Copy content Toggle raw display
$53$ \( (T^{2} - 12 T + 12)^{2} \) Copy content Toggle raw display
$59$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$61$ \( T^{4} - 18 T^{3} + \cdots + 5625 \) Copy content Toggle raw display
$67$ \( T^{4} - 16 T^{3} + \cdots + 1600 \) Copy content Toggle raw display
$71$ \( (T^{2} + 10 T + 1)^{2} \) Copy content Toggle raw display
$73$ \( (T^{2} - 4 T - 20)^{2} \) Copy content Toggle raw display
$79$ \( T^{4} + 6 T^{3} + \cdots + 225 \) Copy content Toggle raw display
$83$ \( (T^{2} + 2 T + 4)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} + 24 T + 120)^{2} \) Copy content Toggle raw display
$97$ \( T^{4} + 4 T^{3} + \cdots + 400 \) Copy content Toggle raw display
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