Properties

Label 2100.2.d.j
Level $2100$
Weight $2$
Character orbit 2100.d
Analytic conductor $16.769$
Analytic rank $0$
Dimension $8$
CM discriminant -35
Inner twists $8$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [2100,2,Mod(1301,2100)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(2100, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1, 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("2100.1301");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 2100 = 2^{2} \cdot 3 \cdot 5^{2} \cdot 7 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 2100.d (of order \(2\), degree \(1\), 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: \(16.7685844245\)
Analytic rank: \(0\)
Dimension: \(8\)
Coefficient field: 8.0.121550625.1
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{8} - x^{7} - 4x^{6} - 9x^{5} + 23x^{4} + 18x^{3} - 16x^{2} + 8x + 16 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, \ldots, a_{7}]\)
Coefficient ring index: \( 2^{8}\cdot 3^{2} \)
Twist minimal: no (minimal twist has level 420)
Sato-Tate group: $\mathrm{U}(1)[D_{2}]$

$q$-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 a basis \(1,\beta_1,\ldots,\beta_{7}\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + \beta_{3} q^{3} + (\beta_{3} - \beta_{2}) q^{7} - \beta_1 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( q + \beta_{3} q^{3} + (\beta_{3} - \beta_{2}) q^{7} - \beta_1 q^{9} + \beta_{4} q^{11} + ( - \beta_{6} + \beta_{3} + \beta_{2}) q^{13} + ( - \beta_{6} - \beta_{5} + \cdots - \beta_{2}) q^{17}+ \cdots + (3 \beta_{4} + \beta_1 - 3) q^{99}+O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 8 q + 2 q^{9}+O(q^{10}) \) Copy content Toggle raw display \( 8 q + 2 q^{9} - 14 q^{21} - 38 q^{39} - 56 q^{49} - 58 q^{51} - 4 q^{79} + 34 q^{81} + 28 q^{91} - 26 q^{99}+O(q^{100}) \) Copy content Toggle raw display

Basis of coefficient ring in terms of a root \(\nu\) of \( x^{8} - x^{7} - 4x^{6} - 9x^{5} + 23x^{4} + 18x^{3} - 16x^{2} + 8x + 16 \) : Copy content Toggle raw display

\(\beta_{1}\)\(=\) \( ( -83\nu^{7} + 165\nu^{6} + 110\nu^{5} + 599\nu^{4} - 2255\nu^{3} + 1540\nu^{2} - 1560\nu - 2200 ) / 816 \) Copy content Toggle raw display
\(\beta_{2}\)\(=\) \( ( -263\nu^{7} + 309\nu^{6} + 818\nu^{5} + 2891\nu^{4} - 5447\nu^{3} - 2624\nu^{2} - 3552\nu - 4120 ) / 2448 \) Copy content Toggle raw display
\(\beta_{3}\)\(=\) \( ( 377\nu^{7} - 747\nu^{6} - 974\nu^{5} - 2357\nu^{4} + 11705\nu^{3} - 1600\nu^{2} - 6624\nu + 4792 ) / 2448 \) Copy content Toggle raw display
\(\beta_{4}\)\(=\) \( ( 11\nu^{7} - 2\nu^{6} - 41\nu^{5} - 131\nu^{4} + 152\nu^{3} + 293\nu^{2} + 90\nu + 4 ) / 68 \) Copy content Toggle raw display
\(\beta_{5}\)\(=\) \( ( 159\nu^{7} - 253\nu^{6} - 418\nu^{5} - 1059\nu^{4} + 3775\nu^{3} - 480\nu^{2} - 2368\nu + 5096 ) / 816 \) Copy content Toggle raw display
\(\beta_{6}\)\(=\) \( ( -121\nu^{7} + 294\nu^{6} + 43\nu^{5} + 625\nu^{4} - 3712\nu^{3} + 4121\nu^{2} + 1050\nu - 3920 ) / 612 \) Copy content Toggle raw display
\(\beta_{7}\)\(=\) \( ( -673\nu^{7} + 1215\nu^{6} + 1762\nu^{5} + 4621\nu^{4} - 19597\nu^{3} + 3860\nu^{2} + 8616\nu - 10760 ) / 816 \) Copy content Toggle raw display
\(\nu\)\(=\) \( ( \beta_{6} + \beta_{2} - 3\beta_1 ) / 6 \) Copy content Toggle raw display
\(\nu^{2}\)\(=\) \( ( 2\beta_{7} + \beta_{4} + 9\beta_{3} - \beta _1 + 6 ) / 6 \) Copy content Toggle raw display
\(\nu^{3}\)\(=\) \( ( -\beta_{7} - 5\beta_{5} + 2\beta_{4} + \beta_{3} + 4\beta_{2} - \beta _1 + 20 ) / 4 \) Copy content Toggle raw display
\(\nu^{4}\)\(=\) \( ( 2\beta_{7} + 9\beta_{6} + 9\beta_{5} + 4\beta_{4} + 9\beta_{3} + 27\beta_{2} - 25\beta _1 - 12 ) / 6 \) Copy content Toggle raw display
\(\nu^{5}\)\(=\) \( ( 39\beta_{7} - 44\beta_{6} - 33\beta_{5} + 48\beta_{4} + 165\beta_{3} + 22\beta_{2} + 9\beta _1 + 174 ) / 12 \) Copy content Toggle raw display
\(\nu^{6}\)\(=\) \( ( -10\beta_{7} - 18\beta_{5} + 20\beta_{4} - 27\beta_{3} + 45\beta_{2} - 10\beta _1 + 81 ) / 2 \) Copy content Toggle raw display
\(\nu^{7}\)\(=\) \( ( 117\beta_{7} + 34\beta_{6} + 279\beta_{5} + 234\beta_{4} + 279\beta_{3} + 592\beta_{2} - 429\beta _1 - 702 ) / 12 \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2100\mathbb{Z}\right)^\times\).

\(n\) \(701\) \(1051\) \(1177\) \(1501\)
\(\chi(n)\) \(-1\) \(1\) \(1\) \(-1\)

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   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
1301.1
0.553538 + 0.676408i
0.553538 0.676408i
−1.44918 + 1.77086i
−1.44918 1.77086i
−0.862555 0.141174i
−0.862555 + 0.141174i
2.25820 0.369600i
2.25820 + 0.369600i
0 −1.70466 0.306808i 0 0 0 2.64575i 0 2.81174 + 1.04601i 0
1301.2 0 −1.70466 + 0.306808i 0 0 0 2.64575i 0 2.81174 1.04601i 0
1301.3 0 −0.586627 1.62968i 0 0 0 2.64575i 0 −2.31174 + 1.91203i 0
1301.4 0 −0.586627 + 1.62968i 0 0 0 2.64575i 0 −2.31174 1.91203i 0
1301.5 0 0.586627 1.62968i 0 0 0 2.64575i 0 −2.31174 1.91203i 0
1301.6 0 0.586627 + 1.62968i 0 0 0 2.64575i 0 −2.31174 + 1.91203i 0
1301.7 0 1.70466 0.306808i 0 0 0 2.64575i 0 2.81174 1.04601i 0
1301.8 0 1.70466 + 0.306808i 0 0 0 2.64575i 0 2.81174 + 1.04601i 0
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 1301.8
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
35.c odd 2 1 CM by \(\Q(\sqrt{-35}) \)
3.b odd 2 1 inner
5.b even 2 1 inner
7.b odd 2 1 inner
15.d odd 2 1 inner
21.c even 2 1 inner
105.g even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 2100.2.d.j 8
3.b odd 2 1 inner 2100.2.d.j 8
5.b even 2 1 inner 2100.2.d.j 8
5.c odd 4 2 420.2.f.a 8
7.b odd 2 1 inner 2100.2.d.j 8
15.d odd 2 1 inner 2100.2.d.j 8
15.e even 4 2 420.2.f.a 8
20.e even 4 2 1680.2.k.d 8
21.c even 2 1 inner 2100.2.d.j 8
35.c odd 2 1 CM 2100.2.d.j 8
35.f even 4 2 420.2.f.a 8
60.l odd 4 2 1680.2.k.d 8
105.g even 2 1 inner 2100.2.d.j 8
105.k odd 4 2 420.2.f.a 8
140.j odd 4 2 1680.2.k.d 8
420.w even 4 2 1680.2.k.d 8
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
420.2.f.a 8 5.c odd 4 2
420.2.f.a 8 15.e even 4 2
420.2.f.a 8 35.f even 4 2
420.2.f.a 8 105.k odd 4 2
1680.2.k.d 8 20.e even 4 2
1680.2.k.d 8 60.l odd 4 2
1680.2.k.d 8 140.j odd 4 2
1680.2.k.d 8 420.w even 4 2
2100.2.d.j 8 1.a even 1 1 trivial
2100.2.d.j 8 3.b odd 2 1 inner
2100.2.d.j 8 5.b even 2 1 inner
2100.2.d.j 8 7.b odd 2 1 inner
2100.2.d.j 8 15.d odd 2 1 inner
2100.2.d.j 8 21.c even 2 1 inner
2100.2.d.j 8 35.c odd 2 1 CM
2100.2.d.j 8 105.g even 2 1 inner

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(2100, [\chi])\):

\( T_{11}^{4} + 31T_{11}^{2} + 4 \) Copy content Toggle raw display
\( T_{13}^{4} + 71T_{13}^{2} + 1024 \) Copy content Toggle raw display
\( T_{17}^{4} - 97T_{17}^{2} + 2116 \) Copy content Toggle raw display
\( T_{37} \) Copy content Toggle raw display
\( T_{41} \) Copy content Toggle raw display
\( T_{43} \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{8} \) Copy content Toggle raw display
$3$ \( T^{8} - T^{6} + \cdots + 81 \) Copy content Toggle raw display
$5$ \( T^{8} \) Copy content Toggle raw display
$7$ \( (T^{2} + 7)^{4} \) Copy content Toggle raw display
$11$ \( (T^{4} + 31 T^{2} + 4)^{2} \) Copy content Toggle raw display
$13$ \( (T^{4} + 71 T^{2} + 1024)^{2} \) Copy content Toggle raw display
$17$ \( (T^{4} - 97 T^{2} + 2116)^{2} \) Copy content Toggle raw display
$19$ \( T^{8} \) Copy content Toggle raw display
$23$ \( T^{8} \) Copy content Toggle raw display
$29$ \( (T^{4} + 139 T^{2} + 2704)^{2} \) Copy content Toggle raw display
$31$ \( T^{8} \) Copy content Toggle raw display
$37$ \( T^{8} \) Copy content Toggle raw display
$41$ \( T^{8} \) Copy content Toggle raw display
$43$ \( T^{8} \) Copy content Toggle raw display
$47$ \( (T^{4} - 157 T^{2} + 256)^{2} \) Copy content Toggle raw display
$53$ \( T^{8} \) Copy content Toggle raw display
$59$ \( T^{8} \) Copy content Toggle raw display
$61$ \( T^{8} \) Copy content Toggle raw display
$67$ \( T^{8} \) Copy content Toggle raw display
$71$ \( (T^{2} + 140)^{4} \) Copy content Toggle raw display
$73$ \( (T^{2} + 112)^{4} \) Copy content Toggle raw display
$79$ \( (T^{2} + T - 236)^{4} \) Copy content Toggle raw display
$83$ \( (T^{2} - 80)^{4} \) Copy content Toggle raw display
$89$ \( T^{8} \) Copy content Toggle raw display
$97$ \( (T^{4} + 239 T^{2} + 2704)^{2} \) Copy content Toggle raw display
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