Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2888,1,Mod(333,2888)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2888, base_ring=CyclotomicField(18))
chi = DirichletCharacter(H, H._module([0, 9, 17]))
N = Newforms(chi, 1, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("2888.333");
S:= CuspForms(chi, 1);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2888 = 2^{3} \cdot 19^{2} \) |
| Weight: | \( k \) | \(=\) | \( 1 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2888.s (of order \(18\), degree \(6\), 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: | \(1.44129975648\) |
| Analytic rank: | \(0\) |
| Dimension: | \(6\) |
| Coefficient field: | \(\Q(\zeta_{18})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{6} - x^{3} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 152) |
| Projective image: | \(D_{3}\) |
| Projective field: | Galois closure of 3.1.152.1 |
| Artin image: | $S_3\times C_{18}$ |
| Artin field: | Galois closure of \(\mathbb{Q}[x]/(x^{54} - \cdots)\) |
$q$-expansion
comment: q-expansion
sage: f.q_expansion() # note that sage often uses an isomorphic number field
gp: mfcoefs(f, 20)
The \(q\)-expansion and trace form are shown below.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/2888\mathbb{Z}\right)^\times\).
| \(n\) | \(1445\) | \(2167\) | \(2529\) |
| \(\chi(n)\) | \(-1\) | \(1\) | \(\zeta_{18}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 333.1 |
|
−0.173648 | − | 0.984808i | 0.766044 | − | 0.642788i | −0.939693 | + | 0.342020i | 0 | −0.766044 | − | 0.642788i | 0.500000 | − | 0.866025i | 0.500000 | + | 0.866025i | 0 | 0 | ||||||||||||||||||||||||
| 477.1 | −0.173648 | + | 0.984808i | 0.766044 | + | 0.642788i | −0.939693 | − | 0.342020i | 0 | −0.766044 | + | 0.642788i | 0.500000 | + | 0.866025i | 0.500000 | − | 0.866025i | 0 | 0 | |||||||||||||||||||||||||
| 1021.1 | 0.939693 | − | 0.342020i | 0.173648 | − | 0.984808i | 0.766044 | − | 0.642788i | 0 | −0.173648 | − | 0.984808i | 0.500000 | + | 0.866025i | 0.500000 | − | 0.866025i | 0 | 0 | |||||||||||||||||||||||||
| 1029.1 | −0.766044 | − | 0.642788i | −0.939693 | + | 0.342020i | 0.173648 | + | 0.984808i | 0 | 0.939693 | + | 0.342020i | 0.500000 | + | 0.866025i | 0.500000 | − | 0.866025i | 0 | 0 | |||||||||||||||||||||||||
| 2293.1 | −0.766044 | + | 0.642788i | −0.939693 | − | 0.342020i | 0.173648 | − | 0.984808i | 0 | 0.939693 | − | 0.342020i | 0.500000 | − | 0.866025i | 0.500000 | + | 0.866025i | 0 | 0 | |||||||||||||||||||||||||
| 2789.1 | 0.939693 | + | 0.342020i | 0.173648 | + | 0.984808i | 0.766044 | + | 0.642788i | 0 | −0.173648 | + | 0.984808i | 0.500000 | − | 0.866025i | 0.500000 | + | 0.866025i | 0 | 0 | |||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 152.g | odd | 2 | 1 | CM by \(\Q(\sqrt{-38}) \) |
| 19.c | even | 3 | 2 | inner |
| 19.e | even | 9 | 3 | inner |
| 152.l | odd | 6 | 2 | inner |
| 152.s | odd | 18 | 3 | inner |
Twists
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{6} + T_{3}^{3} + 1 \)
acting on \(S_{1}^{\mathrm{new}}(2888, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{6} - T^{3} + 1 \)
|
| $3$ |
\( T^{6} + T^{3} + 1 \)
|
| $5$ |
\( T^{6} \)
|
| $7$ |
\( (T^{2} - T + 1)^{3} \)
|
| $11$ |
\( T^{6} \)
|
| $13$ |
\( T^{6} + T^{3} + 1 \)
|
| $17$ |
\( T^{6} - T^{3} + 1 \)
|
| $19$ |
\( T^{6} \)
|
| $23$ |
\( T^{6} - T^{3} + 1 \)
|
| $29$ |
\( T^{6} + T^{3} + 1 \)
|
| $31$ |
\( T^{6} \)
|
| $37$ |
\( (T + 2)^{6} \)
|
| $41$ |
\( T^{6} \)
|
| $43$ |
\( T^{6} \)
|
| $47$ |
\( T^{6} + 8T^{3} + 64 \)
|
| $53$ |
\( T^{6} + T^{3} + 1 \)
|
| $59$ |
\( T^{6} + T^{3} + 1 \)
|
| $61$ |
\( T^{6} \)
|
| $67$ |
\( T^{6} + T^{3} + 1 \)
|
| $71$ |
\( T^{6} \)
|
| $73$ |
\( T^{6} - T^{3} + 1 \)
|
| $79$ |
\( T^{6} \)
|
| $83$ |
\( T^{6} \)
|
| $89$ |
\( T^{6} \)
|
| $97$ |
\( T^{6} \)
|
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