Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [196,6,Mod(165,196)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(196, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 4]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("196.165");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 196 = 2^{2} \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 196.e (of order \(3\), 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: | \(31.4352286833\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{-3}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{9}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{3}]$ |
$q$-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 primitive root of unity \(\zeta_{6}\). We also show the integral \(q\)-expansion of the trace form.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/196\mathbb{Z}\right)^\times\).
| \(n\) | \(99\) | \(101\) |
| \(\chi(n)\) | \(1\) | \(-\zeta_{6}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 165.1 |
|
0 | 8.00000 | − | 13.8564i | 0 | −8.00000 | − | 13.8564i | 0 | 0 | 0 | −6.50000 | − | 11.2583i | 0 | ||||||||||||||||||
| 177.1 | 0 | 8.00000 | + | 13.8564i | 0 | −8.00000 | + | 13.8564i | 0 | 0 | 0 | −6.50000 | + | 11.2583i | 0 | |||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.c | even | 3 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 196.6.e.h | 2 | |
| 7.b | odd | 2 | 1 | 196.6.e.c | 2 | ||
| 7.c | even | 3 | 1 | 196.6.a.c | ✓ | 1 | |
| 7.c | even | 3 | 1 | inner | 196.6.e.h | 2 | |
| 7.d | odd | 6 | 1 | 196.6.a.f | yes | 1 | |
| 7.d | odd | 6 | 1 | 196.6.e.c | 2 | ||
| 28.f | even | 6 | 1 | 784.6.a.b | 1 | ||
| 28.g | odd | 6 | 1 | 784.6.a.j | 1 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 196.6.a.c | ✓ | 1 | 7.c | even | 3 | 1 | |
| 196.6.a.f | yes | 1 | 7.d | odd | 6 | 1 | |
| 196.6.e.c | 2 | 7.b | odd | 2 | 1 | ||
| 196.6.e.c | 2 | 7.d | odd | 6 | 1 | ||
| 196.6.e.h | 2 | 1.a | even | 1 | 1 | trivial | |
| 196.6.e.h | 2 | 7.c | even | 3 | 1 | inner | |
| 784.6.a.b | 1 | 28.f | even | 6 | 1 | ||
| 784.6.a.j | 1 | 28.g | odd | 6 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{2} - 16T_{3} + 256 \)
acting on \(S_{6}^{\mathrm{new}}(196, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( T^{2} - 16T + 256 \)
|
| $5$ |
\( T^{2} + 16T + 256 \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} - 76T + 5776 \)
|
| $13$ |
\( (T - 880)^{2} \)
|
| $17$ |
\( T^{2} - 1056 T + 1115136 \)
|
| $19$ |
\( T^{2} + 1936 T + 3748096 \)
|
| $23$ |
\( T^{2} + 936T + 876096 \)
|
| $29$ |
\( (T + 3982)^{2} \)
|
| $31$ |
\( T^{2} + 1568 T + 2458624 \)
|
| $37$ |
\( T^{2} + 4938 T + 24383844 \)
|
| $41$ |
\( (T + 15840)^{2} \)
|
| $43$ |
\( (T + 16412)^{2} \)
|
| $47$ |
\( T^{2} - 20768 T + 431309824 \)
|
| $53$ |
\( T^{2} + \cdots + 1398909604 \)
|
| $59$ |
\( T^{2} + 21136 T + 446730496 \)
|
| $61$ |
\( T^{2} - 2992 T + 8952064 \)
|
| $67$ |
\( T^{2} + \cdots + 2100938896 \)
|
| $71$ |
\( (T + 49840)^{2} \)
|
| $73$ |
\( T^{2} + \cdots + 3171942400 \)
|
| $79$ |
\( T^{2} + \cdots + 1660073536 \)
|
| $83$ |
\( (T - 112464)^{2} \)
|
| $89$ |
\( T^{2} + \cdots + 4128833536 \)
|
| $97$ |
\( (T + 2272)^{2} \)
|
| show more | |
| show less |