Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [368,2,Mod(93,368)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(368, base_ring=CyclotomicField(4))
chi = DirichletCharacter(H, H._module([0, 3, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("368.93");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 368 = 2^{4} \cdot 23 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 368.j (of order \(4\), degree \(2\), 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: | \(2.93849479438\) |
| Analytic rank: | \(1\) |
| Dimension: | \(4\) |
| Relative dimension: | \(2\) over \(\Q(i)\) |
| Coefficient field: | \(\Q(\zeta_{12})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{4}]$ |
$q$-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
| \(\beta_{1}\) | \(=\) |
\( \zeta_{12}^{2} + \zeta_{12} \)
|
| \(\beta_{2}\) | \(=\) |
\( \zeta_{12}^{3} \)
|
| \(\beta_{3}\) | \(=\) |
\( -\zeta_{12}^{2} + \zeta_{12} \)
|
| \(\zeta_{12}\) | \(=\) |
\( ( \beta_{3} + \beta_1 ) / 2 \)
|
| \(\zeta_{12}^{2}\) | \(=\) |
\( ( -\beta_{3} + \beta_1 ) / 2 \)
|
| \(\zeta_{12}^{3}\) | \(=\) |
\( \beta_{2} \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/368\mathbb{Z}\right)^\times\).
| \(n\) | \(47\) | \(97\) | \(277\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(\beta_{2}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 93.1 |
|
−1.36603 | + | 0.366025i | −0.633975 | − | 0.633975i | 1.73205 | − | 1.00000i | −1.00000 | + | 1.00000i | 1.09808 | + | 0.633975i | − | 2.73205i | −2.00000 | + | 2.00000i | − | 2.19615i | 1.00000 | − | 1.73205i | ||||||||||||||
| 93.2 | 0.366025 | − | 1.36603i | −2.36603 | − | 2.36603i | −1.73205 | − | 1.00000i | −1.00000 | + | 1.00000i | −4.09808 | + | 2.36603i | 0.732051i | −2.00000 | + | 2.00000i | 8.19615i | 1.00000 | + | 1.73205i | |||||||||||||||||
| 277.1 | −1.36603 | − | 0.366025i | −0.633975 | + | 0.633975i | 1.73205 | + | 1.00000i | −1.00000 | − | 1.00000i | 1.09808 | − | 0.633975i | 2.73205i | −2.00000 | − | 2.00000i | 2.19615i | 1.00000 | + | 1.73205i | |||||||||||||||||
| 277.2 | 0.366025 | + | 1.36603i | −2.36603 | + | 2.36603i | −1.73205 | + | 1.00000i | −1.00000 | − | 1.00000i | −4.09808 | − | 2.36603i | − | 0.732051i | −2.00000 | − | 2.00000i | − | 8.19615i | 1.00000 | − | 1.73205i | |||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 16.e | even | 4 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 368.2.j.b | ✓ | 4 |
| 4.b | odd | 2 | 1 | 1472.2.j.b | 4 | ||
| 16.e | even | 4 | 1 | inner | 368.2.j.b | ✓ | 4 |
| 16.f | odd | 4 | 1 | 1472.2.j.b | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 368.2.j.b | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 368.2.j.b | ✓ | 4 | 16.e | even | 4 | 1 | inner |
| 1472.2.j.b | 4 | 4.b | odd | 2 | 1 | ||
| 1472.2.j.b | 4 | 16.f | odd | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{4} + 6T_{3}^{3} + 18T_{3}^{2} + 18T_{3} + 9 \)
acting on \(S_{2}^{\mathrm{new}}(368, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + 2 T^{3} + \cdots + 4 \)
|
| $3$ |
\( T^{4} + 6 T^{3} + \cdots + 9 \)
|
| $5$ |
\( (T^{2} + 2 T + 2)^{2} \)
|
| $7$ |
\( T^{4} + 8T^{2} + 4 \)
|
| $11$ |
\( T^{4} + 4 T^{3} + \cdots + 484 \)
|
| $13$ |
\( T^{4} + 2 T^{3} + \cdots + 169 \)
|
| $17$ |
\( (T^{2} + 6 T + 6)^{2} \)
|
| $19$ |
\( T^{4} + 4 T^{3} + \cdots + 16 \)
|
| $23$ |
\( (T^{2} + 1)^{2} \)
|
| $29$ |
\( T^{4} + 2 T^{3} + \cdots + 169 \)
|
| $31$ |
\( (T^{2} + 14 T + 37)^{2} \)
|
| $37$ |
\( T^{4} + 24 T^{3} + \cdots + 4356 \)
|
| $41$ |
\( (T^{2} + 9)^{2} \)
|
| $43$ |
\( T^{4} + 8 T^{3} + \cdots + 256 \)
|
| $47$ |
\( (T^{2} + 20 T + 97)^{2} \)
|
| $53$ |
\( T^{4} + 20 T^{3} + \cdots + 16 \)
|
| $59$ |
\( T^{4} - 28 T^{3} + \cdots + 5476 \)
|
| $61$ |
\( (T^{2} - 4 T + 8)^{2} \)
|
| $67$ |
\( T^{4} + 12 T^{3} + \cdots + 36 \)
|
| $71$ |
\( T^{4} + 186T^{2} + 4761 \)
|
| $73$ |
\( (T^{2} + 49)^{2} \)
|
| $79$ |
\( (T^{2} + 8 T - 32)^{2} \)
|
| $83$ |
\( T^{4} + 8 T^{3} + \cdots + 20164 \)
|
| $89$ |
\( (T^{2} + 108)^{2} \)
|
| $97$ |
\( (T^{2} - 22 T + 118)^{2} \)
|
| show more | |
| show less |