Properties

Label 2160.2.f.c
Level $2160$
Weight $2$
Character orbit 2160.f
Analytic conductor $17.248$
Analytic rank $0$
Dimension $2$
CM no
Inner twists $2$

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Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2160,2,Mod(1729,2160)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2160, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 0, 0, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("2160.1729");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2160 = 2^{4} \cdot 3^{3} \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2160.f (of order \(2\), degree \(1\), 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: \(17.2476868366\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{13}]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 1080)
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-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 \(i = \sqrt{-1}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + (2 i - 1) q^{5} + 4 i q^{7}+O(q^{10}) \) Copy content Toggle raw display \( q + (2 i - 1) q^{5} + 4 i q^{7} + q^{11} - i q^{13} + 3 i q^{17} + 2 q^{19} + 7 i q^{23} + ( - 4 i - 3) q^{25} + q^{29} + 9 q^{31} + ( - 4 i - 8) q^{35} - 2 i q^{37} - 10 q^{41} + 9 i q^{43} + 3 i q^{47} - 9 q^{49} - 8 i q^{53} + (2 i - 1) q^{55} - 12 q^{59} + 8 q^{61} + (i + 2) q^{65} + 4 i q^{67} - 2 q^{71} - 14 i q^{73} + 4 i q^{77} - 11 q^{79} - 4 i q^{83} + ( - 3 i - 6) q^{85} - 18 q^{89} + 4 q^{91} + (4 i - 2) q^{95} - 2 i q^{97} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{5} + 2 q^{11} + 4 q^{19} - 6 q^{25} + 2 q^{29} + 18 q^{31} - 16 q^{35} - 20 q^{41} - 18 q^{49} - 2 q^{55} - 24 q^{59} + 16 q^{61} + 4 q^{65} - 4 q^{71} - 22 q^{79} - 12 q^{85} - 36 q^{89} + 8 q^{91} - 4 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2160\mathbb{Z}\right)^\times\).

\(n\) \(271\) \(1297\) \(1621\) \(2081\)
\(\chi(n)\) \(1\) \(-1\) \(1\) \(1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1729.1
1.00000i
1.00000i
0 0 0 −1.00000 2.00000i 0 4.00000i 0 0 0
1729.2 0 0 0 −1.00000 + 2.00000i 0 4.00000i 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
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2160.2.f.c 2
3.b odd 2 1 2160.2.f.f 2
4.b odd 2 1 1080.2.f.b 2
5.b even 2 1 inner 2160.2.f.c 2
12.b even 2 1 1080.2.f.c yes 2
15.d odd 2 1 2160.2.f.f 2
20.d odd 2 1 1080.2.f.b 2
20.e even 4 1 5400.2.a.b 1
20.e even 4 1 5400.2.a.bs 1
60.h even 2 1 1080.2.f.c yes 2
60.l odd 4 1 5400.2.a.c 1
60.l odd 4 1 5400.2.a.bt 1
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
1080.2.f.b 2 4.b odd 2 1
1080.2.f.b 2 20.d odd 2 1
1080.2.f.c yes 2 12.b even 2 1
1080.2.f.c yes 2 60.h even 2 1
2160.2.f.c 2 1.a even 1 1 trivial
2160.2.f.c 2 5.b even 2 1 inner
2160.2.f.f 2 3.b odd 2 1
2160.2.f.f 2 15.d odd 2 1
5400.2.a.b 1 20.e even 4 1
5400.2.a.c 1 60.l odd 4 1
5400.2.a.bs 1 20.e even 4 1
5400.2.a.bt 1 60.l odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2160, [\chi])\):

\( T_{7}^{2} + 16 \) Copy content Toggle raw display
\( T_{11} - 1 \) Copy content Toggle raw display
\( T_{13}^{2} + 1 \) 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
$5$ \( T^{2} + 2T + 5 \) Copy content Toggle raw display
$7$ \( T^{2} + 16 \) Copy content Toggle raw display
$11$ \( (T - 1)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} + 1 \) Copy content Toggle raw display
$17$ \( T^{2} + 9 \) Copy content Toggle raw display
$19$ \( (T - 2)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 49 \) Copy content Toggle raw display
$29$ \( (T - 1)^{2} \) Copy content Toggle raw display
$31$ \( (T - 9)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 4 \) Copy content Toggle raw display
$41$ \( (T + 10)^{2} \) Copy content Toggle raw display
$43$ \( T^{2} + 81 \) Copy content Toggle raw display
$47$ \( T^{2} + 9 \) Copy content Toggle raw display
$53$ \( T^{2} + 64 \) Copy content Toggle raw display
$59$ \( (T + 12)^{2} \) Copy content Toggle raw display
$61$ \( (T - 8)^{2} \) Copy content Toggle raw display
$67$ \( T^{2} + 16 \) Copy content Toggle raw display
$71$ \( (T + 2)^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 196 \) Copy content Toggle raw display
$79$ \( (T + 11)^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 16 \) Copy content Toggle raw display
$89$ \( (T + 18)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} + 4 \) Copy content Toggle raw display
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