Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [441,3,Mod(263,441)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(441, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([1, 4]))
N = Newforms(chi, 3, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("441.263");
S:= CuspForms(chi, 3);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 441 = 3^{2} \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 3 \) |
| Character orbit: | \([\chi]\) | \(=\) | 441.j (of order \(6\), 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: | \(12.0163796583\) |
| 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: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 9) |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{6}]$ |
$q$-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 \(\left(\mathbb{Z}/441\mathbb{Z}\right)^\times\).
| \(n\) | \(199\) | \(344\) |
| \(\chi(n)\) | \(-1 + \zeta_{6}\) | \(1 - \zeta_{6}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 263.1 |
|
1.73205i | 1.50000 | + | 2.59808i | 1.00000 | 3.00000 | + | 1.73205i | −4.50000 | + | 2.59808i | 0 | 8.66025i | −4.50000 | + | 7.79423i | −3.00000 | + | 5.19615i | ||||||||||||||
| 275.1 | − | 1.73205i | 1.50000 | − | 2.59808i | 1.00000 | 3.00000 | − | 1.73205i | −4.50000 | − | 2.59808i | 0 | − | 8.66025i | −4.50000 | − | 7.79423i | −3.00000 | − | 5.19615i | |||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 63.j | odd | 6 | 1 | inner |
Twists
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{3}^{\mathrm{new}}(441, [\chi])\):
|
\( T_{2}^{2} + 3 \)
|
|
\( T_{5}^{2} - 6T_{5} + 12 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + 3 \)
|
| $3$ |
\( T^{2} - 3T + 9 \)
|
| $5$ |
\( T^{2} - 6T + 12 \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} - 3T + 3 \)
|
| $13$ |
\( T^{2} + 4T + 16 \)
|
| $17$ |
\( T^{2} + 27T + 243 \)
|
| $19$ |
\( T^{2} - 11T + 121 \)
|
| $23$ |
\( T^{2} - 48T + 768 \)
|
| $29$ |
\( T^{2} - 78T + 2028 \)
|
| $31$ |
\( (T + 32)^{2} \)
|
| $37$ |
\( T^{2} - 34T + 1156 \)
|
| $41$ |
\( T^{2} - 21T + 147 \)
|
| $43$ |
\( T^{2} - 61T + 3721 \)
|
| $47$ |
\( T^{2} + 2352 \)
|
| $53$ |
\( T^{2} \)
|
| $59$ |
\( T^{2} + 2523 \)
|
| $61$ |
\( (T + 56)^{2} \)
|
| $67$ |
\( (T + 31)^{2} \)
|
| $71$ |
\( T^{2} + 972 \)
|
| $73$ |
\( T^{2} - 65T + 4225 \)
|
| $79$ |
\( (T - 38)^{2} \)
|
| $83$ |
\( T^{2} - 84T + 2352 \)
|
| $89$ |
\( T^{2} - 216T + 15552 \)
|
| $97$ |
\( T^{2} + 115T + 13225 \)
|
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