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Properties

Label 2940.2.bb.c
Level $2940$
Weight $2$
Character orbit 2940.bb
Analytic conductor $23.476$
Analytic rank $0$
Dimension $4$
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] = [2940,2,Mod(949,2940)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2940, base_ring=CyclotomicField(6))
 
chi = DirichletCharacter(H, H._module([0, 0, 3, 4]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2940.949");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2940 = 2^{2} \cdot 3 \cdot 5 \cdot 7^{2} \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2940.bb (of order \(6\), 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: \(23.4760181943\)
Analytic rank: \(0\)
Dimension: \(4\)
Relative dimension: \(2\) over \(\Q(\zeta_{6})\)
Coefficient field: \(\Q(\zeta_{12})\)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{4} - x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2, a_3]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 420)
Sato-Tate group: $\mathrm{SU}(2)[C_{6}]$

$q$-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 \(\zeta_{12}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \zeta_{12} q^{3} + (\zeta_{12}^{3} - 2 \zeta_{12}^{2} - \zeta_{12}) q^{5} + \zeta_{12}^{2} q^{9} +O(q^{10}) \) Copy content Toggle raw display \( q - \zeta_{12} q^{3} + (\zeta_{12}^{3} - 2 \zeta_{12}^{2} - \zeta_{12}) q^{5} + \zeta_{12}^{2} q^{9} + ( - 4 \zeta_{12}^{2} + 4) q^{11} + 6 \zeta_{12}^{3} q^{13} + (2 \zeta_{12}^{3} + 1) q^{15} - 2 \zeta_{12} q^{17} - 6 \zeta_{12}^{2} q^{19} + ( - 2 \zeta_{12}^{3} + 2 \zeta_{12}) q^{23} + (3 \zeta_{12}^{2} + 4 \zeta_{12} - 3) q^{25} - \zeta_{12}^{3} q^{27} - 6 q^{29} + (2 \zeta_{12}^{2} - 2) q^{31} + (4 \zeta_{12}^{3} - 4 \zeta_{12}) q^{33} + ( - 4 \zeta_{12}^{3} + 4 \zeta_{12}) q^{37} + ( - 6 \zeta_{12}^{2} + 6) q^{39} - 8 q^{41} - 4 \zeta_{12}^{3} q^{43} + ( - 2 \zeta_{12}^{2} - \zeta_{12} + 2) q^{45} + ( - 4 \zeta_{12}^{3} + 4 \zeta_{12}) q^{47} + 2 \zeta_{12}^{2} q^{51} - 6 \zeta_{12} q^{53} + (4 \zeta_{12}^{3} - 8) q^{55} + 6 \zeta_{12}^{3} q^{57} + (4 \zeta_{12}^{2} - 4) q^{59} + 14 \zeta_{12}^{2} q^{61} + ( - 12 \zeta_{12}^{3} + \cdots + 12 \zeta_{12}) q^{65} + \cdots + 4 q^{99} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 4 q - 4 q^{5} + 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 4 q - 4 q^{5} + 2 q^{9} + 8 q^{11} + 4 q^{15} - 12 q^{19} - 6 q^{25} - 24 q^{29} - 4 q^{31} + 12 q^{39} - 32 q^{41} + 4 q^{45} + 4 q^{51} - 32 q^{55} - 8 q^{59} + 28 q^{61} - 12 q^{65} - 8 q^{69} - 8 q^{75} - 2 q^{81} + 8 q^{85} - 16 q^{89} - 24 q^{95} + 16 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2940\mathbb{Z}\right)^\times\).

\(n\) \(1081\) \(1177\) \(1471\) \(1961\)
\(\chi(n)\) \(-\zeta_{12}^{2}\) \(-1\) \(1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
949.1
0.866025 + 0.500000i
−0.866025 − 0.500000i
0.866025 − 0.500000i
−0.866025 + 0.500000i
0 −0.866025 − 0.500000i 0 −1.86603 − 1.23205i 0 0 0 0.500000 + 0.866025i 0
949.2 0 0.866025 + 0.500000i 0 −0.133975 − 2.23205i 0 0 0 0.500000 + 0.866025i 0
1549.1 0 −0.866025 + 0.500000i 0 −1.86603 + 1.23205i 0 0 0 0.500000 − 0.866025i 0
1549.2 0 0.866025 − 0.500000i 0 −0.133975 + 2.23205i 0 0 0 0.500000 − 0.866025i 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
5.b even 2 1 inner
7.c even 3 1 inner
35.j even 6 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2940.2.bb.c 4
5.b even 2 1 inner 2940.2.bb.c 4
7.b odd 2 1 2940.2.bb.h 4
7.c even 3 1 2940.2.k.d 2
7.c even 3 1 inner 2940.2.bb.c 4
7.d odd 6 1 420.2.k.a ✓ 2
7.d odd 6 1 2940.2.bb.h 4
21.g even 6 1 1260.2.k.d 2
28.f even 6 1 1680.2.t.a 2
35.c odd 2 1 2940.2.bb.h 4
35.i odd 6 1 420.2.k.a ✓ 2
35.i odd 6 1 2940.2.bb.h 4
35.j even 6 1 2940.2.k.d 2
35.j even 6 1 inner 2940.2.bb.c 4
35.k even 12 1 2100.2.a.e 1
35.k even 12 1 2100.2.a.j 1
84.j odd 6 1 5040.2.t.o 2
105.p even 6 1 1260.2.k.d 2
105.w odd 12 1 6300.2.a.n 1
105.w odd 12 1 6300.2.a.bc 1
140.s even 6 1 1680.2.t.a 2
140.x odd 12 1 8400.2.a.bh 1
140.x odd 12 1 8400.2.a.cd 1
420.be odd 6 1 5040.2.t.o 2
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
420.2.k.a ✓ 2 7.d odd 6 1
420.2.k.a ✓ 2 35.i odd 6 1
1260.2.k.d 2 21.g even 6 1
1260.2.k.d 2 105.p even 6 1
1680.2.t.a 2 28.f even 6 1
1680.2.t.a 2 140.s even 6 1
2100.2.a.e 1 35.k even 12 1
2100.2.a.j 1 35.k even 12 1
2940.2.k.d 2 7.c even 3 1
2940.2.k.d 2 35.j even 6 1
2940.2.bb.c 4 1.a even 1 1 trivial
2940.2.bb.c 4 5.b even 2 1 inner
2940.2.bb.c 4 7.c even 3 1 inner
2940.2.bb.c 4 35.j even 6 1 inner
2940.2.bb.h 4 7.b odd 2 1
2940.2.bb.h 4 7.d odd 6 1
2940.2.bb.h 4 35.c odd 2 1
2940.2.bb.h 4 35.i odd 6 1
5040.2.t.o 2 84.j odd 6 1
5040.2.t.o 2 420.be odd 6 1
6300.2.a.n 1 105.w odd 12 1
6300.2.a.bc 1 105.w odd 12 1
8400.2.a.bh 1 140.x odd 12 1
8400.2.a.cd 1 140.x odd 12 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2940, [\chi])\):

\( T_{11}^{2} - 4T_{11} + 16 \) Copy content Toggle raw display
\( T_{13}^{2} + 36 \) Copy content Toggle raw display
\( T_{19}^{2} + 6T_{19} + 36 \) Copy content Toggle raw display
\( T_{31}^{2} + 2T_{31} + 4 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{4} \) Copy content Toggle raw display
$3$ \( T^{4} - T^{2} + 1 \) Copy content Toggle raw display
$5$ \( T^{4} + 4 T^{3} + \cdots + 25 \) Copy content Toggle raw display
$7$ \( T^{4} \) Copy content Toggle raw display
$11$ \( (T^{2} - 4 T + 16)^{2} \) Copy content Toggle raw display
$13$ \( (T^{2} + 36)^{2} \) Copy content Toggle raw display
$17$ \( T^{4} - 4T^{2} + 16 \) Copy content Toggle raw display
$19$ \( (T^{2} + 6 T + 36)^{2} \) Copy content Toggle raw display
$23$ \( T^{4} - 4T^{2} + 16 \) Copy content Toggle raw display
$29$ \( (T + 6)^{4} \) Copy content Toggle raw display
$31$ \( (T^{2} + 2 T + 4)^{2} \) Copy content Toggle raw display
$37$ \( T^{4} - 16T^{2} + 256 \) Copy content Toggle raw display
$41$ \( (T + 8)^{4} \) Copy content Toggle raw display
$43$ \( (T^{2} + 16)^{2} \) Copy content Toggle raw display
$47$ \( T^{4} - 16T^{2} + 256 \) Copy content Toggle raw display
$53$ \( T^{4} - 36T^{2} + 1296 \) Copy content Toggle raw display
$59$ \( (T^{2} + 4 T + 16)^{2} \) Copy content Toggle raw display
$61$ \( (T^{2} - 14 T + 196)^{2} \) Copy content Toggle raw display
$67$ \( T^{4} - 16T^{2} + 256 \) Copy content Toggle raw display
$71$ \( T^{4} \) Copy content Toggle raw display
$73$ \( T^{4} - 100 T^{2} + 10000 \) Copy content Toggle raw display
$79$ \( T^{4} \) Copy content Toggle raw display
$83$ \( (T^{2} + 256)^{2} \) Copy content Toggle raw display
$89$ \( (T^{2} + 8 T + 64)^{2} \) Copy content Toggle raw display
$97$ \( (T^{2} + 100)^{2} \) Copy content Toggle raw display
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