Properties

Label 2646.2.e.l
Level $2646$
Weight $2$
Character orbit 2646.e
Analytic conductor $21.128$
Analytic rank $0$
Dimension $4$
CM no
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(1549,2646)]
 
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([2, 2]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2646.1549");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2646 = 2 \cdot 3^{3} \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2646.e (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: \(\Z[a_1, \ldots, a_{11}]\)
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.

\(f(q)\) \(=\) \( q - q^{2} + q^{4} + ( - \beta_{2} + \beta_1) q^{5} - q^{8}+O(q^{10}) \) Copy content Toggle raw display \( q - q^{2} + q^{4} + ( - \beta_{2} + \beta_1) q^{5} - q^{8} + (\beta_{2} - \beta_1) q^{10} + ( - 2 \beta_1 + 2) q^{11} + ( - 2 \beta_{3} + 2 \beta_{2}) q^{13} + q^{16} + 2 \beta_1 q^{17} + (\beta_{3} - \beta_{2} + 5 \beta_1 - 5) q^{19} + ( - \beta_{2} + \beta_1) q^{20} + (2 \beta_1 - 2) q^{22} - \beta_1 q^{23} + (2 \beta_{3} - 2 \beta_{2} + 2 \beta_1 - 2) q^{25} + (2 \beta_{3} - 2 \beta_{2}) q^{26} + ( - 2 \beta_{2} - 2 \beta_1) q^{29} + 6 q^{31} - q^{32} - 2 \beta_1 q^{34} + ( - 4 \beta_{3} + 4 \beta_{2} + 2 \beta_1 - 2) q^{37} + ( - \beta_{3} + \beta_{2} - 5 \beta_1 + 5) q^{38} + (\beta_{2} - \beta_1) q^{40} + (4 \beta_{3} - 4 \beta_{2}) q^{41} + ( - 2 \beta_{2} - 2 \beta_1) q^{43} + ( - 2 \beta_1 + 2) q^{44} + \beta_1 q^{46} - 4 \beta_{3} q^{47} + ( - 2 \beta_{3} + 2 \beta_{2} - 2 \beta_1 + 2) q^{50} + ( - 2 \beta_{3} + 2 \beta_{2}) q^{52} + ( - 2 \beta_{2} - 6 \beta_1) q^{53} + ( - 2 \beta_{3} + 2) q^{55} + (2 \beta_{2} + 2 \beta_1) q^{58} + 2 q^{59} + ( - \beta_{3} + 9) q^{61} - 6 q^{62} + q^{64} + ( - 2 \beta_{3} + 12) q^{65} + ( - 2 \beta_{3} - 8) q^{67} + 2 \beta_1 q^{68} + (2 \beta_{3} - 5) q^{71} + (2 \beta_{2} + 2 \beta_1) q^{73} + (4 \beta_{3} - 4 \beta_{2} - 2 \beta_1 + 2) q^{74} + (\beta_{3} - \beta_{2} + 5 \beta_1 - 5) q^{76} + ( - 2 \beta_{3} + 3) q^{79} + ( - \beta_{2} + \beta_1) q^{80} + ( - 4 \beta_{3} + 4 \beta_{2}) q^{82} + 2 \beta_1 q^{83} + (2 \beta_{3} - 2 \beta_{2} + 2 \beta_1 - 2) q^{85} + (2 \beta_{2} + 2 \beta_1) q^{86} + (2 \beta_1 - 2) q^{88} + ( - 2 \beta_{3} + 2 \beta_{2} + 12 \beta_1 - 12) q^{89} - \beta_1 q^{92} + 4 \beta_{3} q^{94} + (6 \beta_{3} - 11) q^{95} + ( - 2 \beta_{2} + 2 \beta_1) q^{97}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 4 q^{2} + 4 q^{4} + 2 q^{5} - 4 q^{8}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 4 q^{2} + 4 q^{4} + 2 q^{5} - 4 q^{8} - 2 q^{10} + 4 q^{11} + 4 q^{16} + 4 q^{17} - 10 q^{19} + 2 q^{20} - 4 q^{22} - 2 q^{23} - 4 q^{25} - 4 q^{29} + 24 q^{31} - 4 q^{32} - 4 q^{34} - 4 q^{37} + 10 q^{38} - 2 q^{40} - 4 q^{43} + 4 q^{44} + 2 q^{46} + 4 q^{50} - 12 q^{53} + 8 q^{55} + 4 q^{58} + 8 q^{59} + 36 q^{61} - 24 q^{62} + 4 q^{64} + 48 q^{65} - 32 q^{67} + 4 q^{68} - 20 q^{71} + 4 q^{73} + 4 q^{74} - 10 q^{76} + 12 q^{79} + 2 q^{80} + 4 q^{83} - 4 q^{85} + 4 q^{86} - 4 q^{88} - 24 q^{89} - 2 q^{92} - 44 q^{95} + 4 q^{97}+O(q^{100}) \) 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
\(\nu\)\(=\) \( ( \beta_{3} + \beta_{2} ) / 3 \) 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

Character values

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

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

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1549.1
1.22474 + 0.707107i
−1.22474 0.707107i
1.22474 0.707107i
−1.22474 + 0.707107i
−1.00000 0 1.00000 −0.724745 1.25529i 0 0 −1.00000 0 0.724745 + 1.25529i
1549.2 −1.00000 0 1.00000 1.72474 + 2.98735i 0 0 −1.00000 0 −1.72474 2.98735i
2125.1 −1.00000 0 1.00000 −0.724745 + 1.25529i 0 0 −1.00000 0 0.724745 1.25529i
2125.2 −1.00000 0 1.00000 1.72474 2.98735i 0 0 −1.00000 0 −1.72474 + 2.98735i
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
63.h 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.e.l 4
3.b odd 2 1 882.2.e.m 4
7.b odd 2 1 2646.2.e.k 4
7.c even 3 1 378.2.f.d 4
7.c even 3 1 2646.2.h.m 4
7.d odd 6 1 2646.2.f.k 4
7.d odd 6 1 2646.2.h.n 4
9.c even 3 1 2646.2.h.m 4
9.d odd 6 1 882.2.h.k 4
21.c even 2 1 882.2.e.n 4
21.g even 6 1 882.2.f.j 4
21.g even 6 1 882.2.h.l 4
21.h odd 6 1 126.2.f.c 4
21.h odd 6 1 882.2.h.k 4
28.g odd 6 1 3024.2.r.e 4
63.g even 3 1 378.2.f.d 4
63.h even 3 1 1134.2.a.i 2
63.h even 3 1 inner 2646.2.e.l 4
63.i even 6 1 882.2.e.n 4
63.i even 6 1 7938.2.a.bn 2
63.j odd 6 1 882.2.e.m 4
63.j odd 6 1 1134.2.a.p 2
63.k odd 6 1 2646.2.f.k 4
63.l odd 6 1 2646.2.h.n 4
63.n odd 6 1 126.2.f.c 4
63.o even 6 1 882.2.h.l 4
63.s even 6 1 882.2.f.j 4
63.t odd 6 1 2646.2.e.k 4
63.t odd 6 1 7938.2.a.bm 2
84.n even 6 1 1008.2.r.e 4
252.o even 6 1 1008.2.r.e 4
252.u odd 6 1 9072.2.a.bd 2
252.bb even 6 1 9072.2.a.bk 2
252.bl odd 6 1 3024.2.r.e 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
126.2.f.c 4 21.h odd 6 1
126.2.f.c 4 63.n odd 6 1
378.2.f.d 4 7.c even 3 1
378.2.f.d 4 63.g even 3 1
882.2.e.m 4 3.b odd 2 1
882.2.e.m 4 63.j odd 6 1
882.2.e.n 4 21.c even 2 1
882.2.e.n 4 63.i even 6 1
882.2.f.j 4 21.g even 6 1
882.2.f.j 4 63.s even 6 1
882.2.h.k 4 9.d odd 6 1
882.2.h.k 4 21.h odd 6 1
882.2.h.l 4 21.g even 6 1
882.2.h.l 4 63.o even 6 1
1008.2.r.e 4 84.n even 6 1
1008.2.r.e 4 252.o even 6 1
1134.2.a.i 2 63.h even 3 1
1134.2.a.p 2 63.j odd 6 1
2646.2.e.k 4 7.b odd 2 1
2646.2.e.k 4 63.t odd 6 1
2646.2.e.l 4 1.a even 1 1 trivial
2646.2.e.l 4 63.h even 3 1 inner
2646.2.f.k 4 7.d odd 6 1
2646.2.f.k 4 63.k odd 6 1
2646.2.h.m 4 7.c even 3 1
2646.2.h.m 4 9.c even 3 1
2646.2.h.n 4 7.d odd 6 1
2646.2.h.n 4 63.l odd 6 1
3024.2.r.e 4 28.g odd 6 1
3024.2.r.e 4 252.bl odd 6 1
7938.2.a.bm 2 63.t odd 6 1
7938.2.a.bn 2 63.i even 6 1
9072.2.a.bd 2 252.u odd 6 1
9072.2.a.bk 2 252.bb even 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

$p$ $F_p(T)$
$2$ \( (T + 1)^{4} \) Copy content Toggle raw display
$3$ \( T^{4} \) Copy content Toggle raw display
$5$ \( T^{4} - 2 T^{3} + 9 T^{2} + 10 T + 25 \) 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
$17$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$19$ \( T^{4} + 10 T^{3} + 81 T^{2} + \cdots + 361 \) Copy content Toggle raw display
$23$ \( (T^{2} + T + 1)^{2} \) Copy content Toggle raw display
$29$ \( T^{4} + 4 T^{3} + 36 T^{2} - 80 T + 400 \) Copy content Toggle raw display
$31$ \( (T - 6)^{4} \) Copy content Toggle raw display
$37$ \( T^{4} + 4 T^{3} + 108 T^{2} + \cdots + 8464 \) Copy content Toggle raw display
$41$ \( T^{4} + 96T^{2} + 9216 \) Copy content Toggle raw display
$43$ \( T^{4} + 4 T^{3} + 36 T^{2} - 80 T + 400 \) Copy content Toggle raw display
$47$ \( (T^{2} - 96)^{2} \) Copy content Toggle raw display
$53$ \( T^{4} + 12 T^{3} + 132 T^{2} + \cdots + 144 \) Copy content Toggle raw display
$59$ \( (T - 2)^{4} \) Copy content Toggle raw display
$61$ \( (T^{2} - 18 T + 75)^{2} \) Copy content Toggle raw display
$67$ \( (T^{2} + 16 T + 40)^{2} \) Copy content Toggle raw display
$71$ \( (T^{2} + 10 T + 1)^{2} \) Copy content Toggle raw display
$73$ \( T^{4} - 4 T^{3} + 36 T^{2} + 80 T + 400 \) Copy content Toggle raw display
$79$ \( (T^{2} - 6 T - 15)^{2} \) Copy content Toggle raw display
$83$ \( (T^{2} - 2 T + 4)^{2} \) Copy content Toggle raw display
$89$ \( T^{4} + 24 T^{3} + 456 T^{2} + \cdots + 14400 \) Copy content Toggle raw display
$97$ \( T^{4} - 4 T^{3} + 36 T^{2} + 80 T + 400 \) Copy content Toggle raw display
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