Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [363,3,Mod(241,363)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(363, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 1]))
N = Newforms(chi, 3, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("363.241");
S:= CuspForms(chi, 3);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 363 = 3 \cdot 11^{2} \) |
| Weight: | \( k \) | \(=\) | \( 3 \) |
| Character orbit: | \([\chi]\) | \(=\) | 363.c (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: | \(9.89103359628\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(\sqrt{-2}, \sqrt{3})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 4x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{2}]$ |
$q$-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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{4} + 4x^{2} + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} + 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{3} + 4\nu \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} - 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} - 4\beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/363\mathbb{Z}\right)^\times\).
| \(n\) | \(122\) | \(244\) |
| \(\chi(n)\) | \(1\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 241.1 |
|
− | 3.86370i | −1.73205 | −10.9282 | −5.46410 | 6.69213i | 1.93185i | 26.7685i | 3.00000 | 21.1117i | |||||||||||||||||||||||||||||
| 241.2 | − | 1.03528i | 1.73205 | 2.92820 | 1.46410 | − | 1.79315i | 0.517638i | − | 7.17260i | 3.00000 | − | 1.51575i | |||||||||||||||||||||||||||
| 241.3 | 1.03528i | 1.73205 | 2.92820 | 1.46410 | 1.79315i | − | 0.517638i | 7.17260i | 3.00000 | 1.51575i | ||||||||||||||||||||||||||||||
| 241.4 | 3.86370i | −1.73205 | −10.9282 | −5.46410 | − | 6.69213i | − | 1.93185i | − | 26.7685i | 3.00000 | − | 21.1117i | |||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 11.b | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 363.3.c.a | ✓ | 4 |
| 3.b | odd | 2 | 1 | 1089.3.c.c | 4 | ||
| 11.b | odd | 2 | 1 | inner | 363.3.c.a | ✓ | 4 |
| 11.c | even | 5 | 4 | 363.3.g.d | 16 | ||
| 11.d | odd | 10 | 4 | 363.3.g.d | 16 | ||
| 33.d | even | 2 | 1 | 1089.3.c.c | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 363.3.c.a | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 363.3.c.a | ✓ | 4 | 11.b | odd | 2 | 1 | inner |
| 363.3.g.d | 16 | 11.c | even | 5 | 4 | ||
| 363.3.g.d | 16 | 11.d | odd | 10 | 4 | ||
| 1089.3.c.c | 4 | 3.b | odd | 2 | 1 | ||
| 1089.3.c.c | 4 | 33.d | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{4} + 16T_{2}^{2} + 16 \)
acting on \(S_{3}^{\mathrm{new}}(363, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + 16T^{2} + 16 \)
|
| $3$ |
\( (T^{2} - 3)^{2} \)
|
| $5$ |
\( (T^{2} + 4 T - 8)^{2} \)
|
| $7$ |
\( T^{4} + 4T^{2} + 1 \)
|
| $11$ |
\( T^{4} \)
|
| $13$ |
\( T^{4} + 468 T^{2} + 39204 \)
|
| $17$ |
\( T^{4} + 336T^{2} + 576 \)
|
| $19$ |
\( T^{4} + 324T^{2} + 6561 \)
|
| $23$ |
\( (T^{2} - 12 T - 1164)^{2} \)
|
| $29$ |
\( T^{4} + 3472 T^{2} + 2999824 \)
|
| $31$ |
\( (T^{2} - 56 T + 781)^{2} \)
|
| $37$ |
\( (T^{2} - 40 T - 2123)^{2} \)
|
| $41$ |
\( T^{4} + 624T^{2} + 144 \)
|
| $43$ |
\( T^{4} + 2388 T^{2} + 1340964 \)
|
| $47$ |
\( (T^{2} + 4 T - 4796)^{2} \)
|
| $53$ |
\( (T^{2} + 20 T - 2972)^{2} \)
|
| $59$ |
\( (T^{2} + 32 T - 44)^{2} \)
|
| $61$ |
\( T^{4} + 8356 T^{2} + 16834609 \)
|
| $67$ |
\( (T^{2} + 80 T + 13)^{2} \)
|
| $71$ |
\( (T^{2} + 100 T + 1912)^{2} \)
|
| $73$ |
\( T^{4} + 8596 T^{2} + 36481 \)
|
| $79$ |
\( T^{4} + 8148 T^{2} + 2405601 \)
|
| $83$ |
\( T^{4} + 25648 T^{2} + 53993104 \)
|
| $89$ |
\( (T^{2} - 72 T + 864)^{2} \)
|
| $97$ |
\( (T^{2} + 70 T - 9575)^{2} \)
|
| show more | |
| show less |