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Properties

Label 1920.2.bc.g
Level $1920$
Weight $2$
Character orbit 1920.bc
Analytic conductor $15.331$
Analytic rank $0$
Dimension $6$
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] = [1920,2,Mod(607,1920)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(1920, base_ring=CyclotomicField(4))
 
chi = DirichletCharacter(H, H._module([2, 3, 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("1920.607");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 1920 = 2^{7} \cdot 3 \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1920.bc (of order \(4\), 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: \(15.3312771881\)
Analytic rank: \(0\)
Dimension: \(6\)
Relative dimension: \(3\) over \(\Q(i)\)
Coefficient field: 6.0.399424.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{6} - 2x^{5} + 3x^{4} - 6x^{3} + 6x^{2} - 8x + 8 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{17}]\)
Coefficient ring index: \( 2^{6} \)
Twist minimal: no (minimal twist has level 240)
Sato-Tate group: $\mathrm{SU}(2)[C_{4}]$

$q$-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 \(1,\beta_1,\ldots,\beta_{5}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q - \beta_1 q^{3} + ( - \beta_1 - 2) q^{5} + \beta_{4} q^{7} - q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q - \beta_1 q^{3} + ( - \beta_1 - 2) q^{5} + \beta_{4} q^{7} - q^{9} - \beta_{4} q^{11} + (2 \beta_1 - 1) q^{15} + ( - \beta_{4} - \beta_{2} + \beta_1 - 1) q^{17} + ( - \beta_{2} + 2 \beta_1 - 2) q^{19} - \beta_{5} q^{21} + (\beta_{3} + 2 \beta_1 + 2) q^{23} + (4 \beta_1 + 3) q^{25} + \beta_1 q^{27} + ( - \beta_1 - 1) q^{29} + (\beta_{5} - \beta_{4}) q^{31} + \beta_{5} q^{33} + ( - \beta_{5} - 2 \beta_{4}) q^{35} + (\beta_{5} + \beta_{4} + \cdots + \beta_{2}) q^{37}+ \cdots + \beta_{4} q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 6 q - 12 q^{5} - 2 q^{7} - 6 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 6 q - 12 q^{5} - 2 q^{7} - 6 q^{9} + 2 q^{11} - 6 q^{15} - 2 q^{17} - 10 q^{19} + 2 q^{21} + 10 q^{23} + 18 q^{25} - 6 q^{29} - 2 q^{33} + 6 q^{35} - 8 q^{37} - 4 q^{43} + 12 q^{45} - 10 q^{47} + 2 q^{51} - 6 q^{55} + 10 q^{57} - 6 q^{59} + 14 q^{61} + 2 q^{63} + 36 q^{67} + 10 q^{69} - 16 q^{71} + 10 q^{73} + 24 q^{75} - 16 q^{79} + 6 q^{81} + 6 q^{85} - 6 q^{87} + 28 q^{89} - 4 q^{93} + 30 q^{95} - 10 q^{97} - 2 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Display 100 coefficients 10 coefficients

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{6} - 2x^{5} + 3x^{4} - 6x^{3} + 6x^{2} - 8x + 8 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -\nu^{5} - 3\nu^{3} + 4\nu^{2} - 2\nu + 8 ) / 4 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( \nu^{5} + 4\nu^{4} - 5\nu^{3} + 8\nu^{2} - 14\nu + 4 ) / 4 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( -3\nu^{5} + 4\nu^{4} - 9\nu^{3} + 8\nu^{2} + 2\nu + 12 ) / 4 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 3\nu^{5} - 4\nu^{4} + 9\nu^{3} - 8\nu^{2} + 14\nu - 20 ) / 4 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( -5\nu^{5} + 4\nu^{4} - 7\nu^{3} + 16\nu^{2} - 10\nu + 20 ) / 4 \) Copy content Toggle raw display

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

\(\nu\)\(=\) \( ( \beta_{4} + \beta_{3} + 2 ) / 4 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( \beta_{5} + 2\beta_{4} + \beta_{2} + 2\beta_1 ) / 4 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( 2\beta_{5} + \beta_{4} - \beta_{3} - 4\beta _1 + 6 ) / 4 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( \beta_{5} + 2\beta_{3} + \beta_{2} - 10\beta _1 + 8 ) / 4 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( -2\beta_{5} + 3\beta_{4} + \beta_{3} + 4\beta_{2} + 4\beta _1 + 10 ) / 4 \) Copy content Toggle raw display

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

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1920\mathbb{Z}\right)^\times\).

\(n\) \(511\) \(641\) \(901\) \(1537\)
\(\chi(n)\) \(-1\) \(1\) \(\beta_{1}\) \(-\beta_{1}\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
607.1
0.264658 − 1.38923i
−0.671462 + 1.24464i
1.40680 + 0.144584i
0.264658 + 1.38923i
−0.671462 − 1.24464i
1.40680 − 0.144584i
0 1.00000i 0 −2.00000 + 1.00000i 0 −3.24914 − 3.24914i 0 −1.00000 0
607.2 0 1.00000i 0 −2.00000 + 1.00000i 0 0.146365 + 0.146365i 0 −1.00000 0
607.3 0 1.00000i 0 −2.00000 + 1.00000i 0 2.10278 + 2.10278i 0 −1.00000 0
1183.1 0 − 1.00000i 0 −2.00000 − 1.00000i 0 −3.24914 + 3.24914i 0 −1.00000 0
1183.2 0 − 1.00000i 0 −2.00000 − 1.00000i 0 0.146365 − 0.146365i 0 −1.00000 0
1183.3 0 − 1.00000i 0 −2.00000 − 1.00000i 0 2.10278 − 2.10278i 0 −1.00000 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 607.3
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
80.j even 4 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 1920.2.bc.g 6
4.b odd 2 1 1920.2.bc.h 6
5.c odd 4 1 1920.2.y.g 6
8.b even 2 1 240.2.bc.d yes 6
8.d odd 2 1 960.2.bc.d 6
16.e even 4 1 960.2.y.d 6
16.e even 4 1 1920.2.y.h 6
16.f odd 4 1 240.2.y.d ✓ 6
16.f odd 4 1 1920.2.y.g 6
20.e even 4 1 1920.2.y.h 6
24.h odd 2 1 720.2.bd.e 6
40.i odd 4 1 240.2.y.d ✓ 6
40.k even 4 1 960.2.y.d 6
48.k even 4 1 720.2.z.e 6
80.i odd 4 1 960.2.bc.d 6
80.j even 4 1 inner 1920.2.bc.g 6
80.s even 4 1 240.2.bc.d yes 6
80.t odd 4 1 1920.2.bc.h 6
120.w even 4 1 720.2.z.e 6
240.z odd 4 1 720.2.bd.e 6
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
240.2.y.d ✓ 6 16.f odd 4 1
240.2.y.d ✓ 6 40.i odd 4 1
240.2.bc.d yes 6 8.b even 2 1
240.2.bc.d yes 6 80.s even 4 1
720.2.z.e 6 48.k even 4 1
720.2.z.e 6 120.w even 4 1
720.2.bd.e 6 24.h odd 2 1
720.2.bd.e 6 240.z odd 4 1
960.2.y.d 6 16.e even 4 1
960.2.y.d 6 40.k even 4 1
960.2.bc.d 6 8.d odd 2 1
960.2.bc.d 6 80.i odd 4 1
1920.2.y.g 6 5.c odd 4 1
1920.2.y.g 6 16.f odd 4 1
1920.2.y.h 6 16.e even 4 1
1920.2.y.h 6 20.e even 4 1
1920.2.bc.g 6 1.a even 1 1 trivial
1920.2.bc.g 6 80.j even 4 1 inner
1920.2.bc.h 6 4.b odd 2 1
1920.2.bc.h 6 80.t odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1920, [\chi])\):

\( T_{7}^{6} + 2T_{7}^{5} + 2T_{7}^{4} - 32T_{7}^{3} + 196T_{7}^{2} - 56T_{7} + 8 \) Copy content Toggle raw display
\( T_{11}^{6} - 2T_{11}^{5} + 2T_{11}^{4} + 32T_{11}^{3} + 196T_{11}^{2} + 56T_{11} + 8 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{6} \) Copy content Toggle raw display
$3$ \( (T^{2} + 1)^{3} \) Copy content Toggle raw display
$5$ \( (T^{2} + 4 T + 5)^{3} \) Copy content Toggle raw display
$7$ \( T^{6} + 2 T^{5} + \cdots + 8 \) Copy content Toggle raw display
$11$ \( T^{6} - 2 T^{5} + \cdots + 8 \) Copy content Toggle raw display
$13$ \( T^{6} \) Copy content Toggle raw display
$17$ \( T^{6} + 2 T^{5} + \cdots + 8 \) Copy content Toggle raw display
$19$ \( T^{6} + 10 T^{5} + \cdots + 14792 \) Copy content Toggle raw display
$23$ \( T^{6} - 10 T^{5} + \cdots + 14792 \) Copy content Toggle raw display
$29$ \( (T^{2} + 2 T + 2)^{3} \) Copy content Toggle raw display
$31$ \( T^{6} + 60 T^{4} + \cdots + 64 \) Copy content Toggle raw display
$37$ \( (T^{3} + 4 T^{2} + \cdots - 128)^{2} \) Copy content Toggle raw display
$41$ \( (T^{2} + 16)^{3} \) Copy content Toggle raw display
$43$ \( (T^{3} + 2 T^{2} + \cdots + 136)^{2} \) Copy content Toggle raw display
$47$ \( T^{6} + 10 T^{5} + \cdots + 412232 \) Copy content Toggle raw display
$53$ \( T^{6} + 236 T^{4} + \cdots + 118336 \) Copy content Toggle raw display
$59$ \( T^{6} + 6 T^{5} + \cdots + 35912 \) Copy content Toggle raw display
$61$ \( T^{6} - 14 T^{5} + \cdots + 4232 \) Copy content Toggle raw display
$67$ \( (T^{3} - 18 T^{2} + \cdots + 1208)^{2} \) Copy content Toggle raw display
$71$ \( (T^{3} + 8 T^{2} + \cdots - 512)^{2} \) Copy content Toggle raw display
$73$ \( T^{6} - 10 T^{5} + \cdots + 42632 \) Copy content Toggle raw display
$79$ \( (T^{3} + 8 T^{2} + \cdots - 512)^{2} \) Copy content Toggle raw display
$83$ \( T^{6} + 368 T^{4} + \cdots + 495616 \) Copy content Toggle raw display
$89$ \( (T^{3} - 14 T^{2} + \cdots + 184)^{2} \) Copy content Toggle raw display
$97$ \( T^{6} + 10 T^{5} + \cdots + 1338248 \) Copy content Toggle raw display
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