Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [167,1,Mod(166,167)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(167, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1]))
N = Newforms(chi, 1, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("167.166");
S:= CuspForms(chi, 1);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 167 \) |
| Weight: | \( k \) | \(=\) | \( 1 \) |
| Character orbit: | \([\chi]\) | \(=\) | 167.b (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: | yes |
| Analytic conductor: | \(0.0833438571097\) |
| Analytic rank: | \(0\) |
| Dimension: | \(5\) |
| Coefficient field: | \(\Q(\zeta_{22})^+\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - x^{4} - 4x^{3} + 3x^{2} + 3x - 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Projective image: | \(D_{11}\) |
| Projective field: | Galois closure of 11.1.129891985607.1 |
$q$-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 \(1,\beta_1,\beta_2,\beta_3,\beta_4\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of \(\nu = \zeta_{22} + \zeta_{22}^{-1}\):
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{3} - 3\nu \)
|
| \(\beta_{4}\) | \(=\) |
\( \nu^{4} - 4\nu^{2} + 2 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} + 3\beta_1 \)
|
| \(\nu^{4}\) | \(=\) |
\( \beta_{4} + 4\beta_{2} + 6 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/167\mathbb{Z}\right)^\times\).
| \(n\) | \(5\) |
| \(\chi(n)\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 166.1 |
|
−1.91899 | 0.830830 | 2.68251 | 0 | −1.59435 | −0.284630 | −3.22871 | −0.309721 | 0 | |||||||||||||||||||||||||||||||||
| 166.2 | −1.30972 | −1.91899 | 0.715370 | 0 | 2.51334 | 0.830830 | 0.372786 | 2.68251 | 0 | ||||||||||||||||||||||||||||||||||
| 166.3 | −0.284630 | 1.68251 | −0.918986 | 0 | −0.478891 | −1.30972 | 0.546200 | 1.83083 | 0 | ||||||||||||||||||||||||||||||||||
| 166.4 | 0.830830 | −0.284630 | −0.309721 | 0 | −0.236479 | 1.68251 | −1.08816 | −0.918986 | 0 | ||||||||||||||||||||||||||||||||||
| 166.5 | 1.68251 | −1.30972 | 1.83083 | 0 | −2.20362 | −1.91899 | 1.39788 | 0.715370 | 0 | ||||||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 167.b | odd | 2 | 1 | CM by \(\Q(\sqrt{-167}) \) |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 167.1.b.a | ✓ | 5 |
| 3.b | odd | 2 | 1 | 1503.1.d.a | 5 | ||
| 4.b | odd | 2 | 1 | 2672.1.g.a | 5 | ||
| 167.b | odd | 2 | 1 | CM | 167.1.b.a | ✓ | 5 |
| 501.c | even | 2 | 1 | 1503.1.d.a | 5 | ||
| 668.b | even | 2 | 1 | 2672.1.g.a | 5 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 167.1.b.a | ✓ | 5 | 1.a | even | 1 | 1 | trivial |
| 167.1.b.a | ✓ | 5 | 167.b | odd | 2 | 1 | CM |
| 1503.1.d.a | 5 | 3.b | odd | 2 | 1 | ||
| 1503.1.d.a | 5 | 501.c | even | 2 | 1 | ||
| 2672.1.g.a | 5 | 4.b | odd | 2 | 1 | ||
| 2672.1.g.a | 5 | 668.b | even | 2 | 1 | ||
Hecke kernels
This newform subspace is the entire newspace \(S_{1}^{\mathrm{new}}(167, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $3$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $5$ |
\( T^{5} \)
|
| $7$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $11$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $13$ |
\( T^{5} \)
|
| $17$ |
\( T^{5} \)
|
| $19$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $23$ |
\( T^{5} \)
|
| $29$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $31$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $37$ |
\( T^{5} \)
|
| $41$ |
\( T^{5} \)
|
| $43$ |
\( T^{5} \)
|
| $47$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $53$ |
\( T^{5} \)
|
| $59$ |
\( T^{5} \)
|
| $61$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $67$ |
\( T^{5} \)
|
| $71$ |
\( T^{5} \)
|
| $73$ |
\( T^{5} \)
|
| $79$ |
\( T^{5} \)
|
| $83$ |
\( T^{5} \)
|
| $89$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
| $97$ |
\( T^{5} + T^{4} - 4 T^{3} + \cdots + 1 \)
|
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