Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [6864,2,Mod(1,6864)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(6864, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0, 0, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("6864.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 6864 = 2^{4} \cdot 3 \cdot 11 \cdot 13 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 6864.a (trivial) |
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: | \(54.8093159474\) |
| Analytic rank: | \(0\) |
| Dimension: | \(5\) |
| Coefficient field: | 5.5.2172244.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - 2x^{4} - 8x^{3} + 16x^{2} + 5x - 8 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 3432) |
| Fricke sign: | \(-1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-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 \(1,\beta_1,\beta_2,\beta_3,\beta_4\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{5} - 2x^{4} - 8x^{3} + 16x^{2} + 5x - 8 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( \nu^{4} + \nu^{3} - 7\nu^{2} - 5\nu + 4 ) / 2 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -\nu^{4} + \nu^{3} + 7\nu^{2} - 5\nu - 2 ) / 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -\nu^{4} + \nu^{3} + 7\nu^{2} - 9\nu - 2 ) / 2 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( -\nu^{4} + \nu^{3} + 9\nu^{2} - 7\nu - 10 ) / 2 \)
|
| \(\nu\) | \(=\) |
\( ( -\beta_{3} + \beta_{2} ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 2\beta_{4} - \beta_{3} - \beta_{2} + 8 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( -5\beta_{3} + 7\beta_{2} + 2\beta _1 - 2 ) / 2 \)
|
| \(\nu^{4}\) | \(=\) |
\( ( 14\beta_{4} - 7\beta_{3} - 9\beta_{2} + 2\beta _1 + 50 ) / 2 \)
|
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
0 | 1.00000 | 0 | −3.47314 | 0 | 3.67591 | 0 | 1.00000 | 0 | |||||||||||||||||||||||||||||||||
| 1.2 | 0 | 1.00000 | 0 | −1.05398 | 0 | −4.24902 | 0 | 1.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.3 | 0 | 1.00000 | 0 | 0.169303 | 0 | 1.46187 | 0 | 1.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.4 | 0 | 1.00000 | 0 | 1.82899 | 0 | 0.862883 | 0 | 1.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.5 | 0 | 1.00000 | 0 | 3.52882 | 0 | 3.24835 | 0 | 1.00000 | 0 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(1\) |
| \(3\) | \(-1\) |
| \(11\) | \(-1\) |
| \(13\) | \(-1\) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 6864.2.a.cf | 5 | |
| 4.b | odd | 2 | 1 | 3432.2.a.w | ✓ | 5 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 3432.2.a.w | ✓ | 5 | 4.b | odd | 2 | 1 | |
| 6864.2.a.cf | 5 | 1.a | even | 1 | 1 | trivial | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(6864))\):
|
\( T_{5}^{5} - T_{5}^{4} - 14T_{5}^{3} + 12T_{5}^{2} + 22T_{5} - 4 \)
|
|
\( T_{7}^{5} - 5T_{7}^{4} - 10T_{7}^{3} + 88T_{7}^{2} - 140T_{7} + 64 \)
|
|
\( T_{17}^{5} - 52T_{17}^{3} - 22T_{17}^{2} + 492T_{17} - 256 \)
|
|
\( T_{19}^{5} - 4T_{19}^{4} - 40T_{19}^{3} + 164T_{19}^{2} - 152T_{19} + 32 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} \)
|
| $3$ |
\( (T - 1)^{5} \)
|
| $5$ |
\( T^{5} - T^{4} - 14 T^{3} + \cdots - 4 \)
|
| $7$ |
\( T^{5} - 5 T^{4} + \cdots + 64 \)
|
| $11$ |
\( (T - 1)^{5} \)
|
| $13$ |
\( (T - 1)^{5} \)
|
| $17$ |
\( T^{5} - 52 T^{3} + \cdots - 256 \)
|
| $19$ |
\( T^{5} - 4 T^{4} + \cdots + 32 \)
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| $23$ |
\( T^{5} - 5 T^{4} + \cdots - 544 \)
|
| $29$ |
\( T^{5} - 11 T^{4} + \cdots - 4892 \)
|
| $31$ |
\( T^{5} - 8 T^{4} + \cdots + 256 \)
|
| $37$ |
\( T^{5} + 8 T^{4} + \cdots + 17152 \)
|
| $41$ |
\( T^{5} + T^{4} + \cdots - 2648 \)
|
| $43$ |
\( T^{5} + T^{4} + \cdots + 1208 \)
|
| $47$ |
\( T^{5} - 18 T^{4} + \cdots - 2048 \)
|
| $53$ |
\( T^{5} - 2 T^{4} + \cdots + 89888 \)
|
| $59$ |
\( T^{5} - 13 T^{4} + \cdots - 64 \)
|
| $61$ |
\( T^{5} - 9 T^{4} + \cdots - 9056 \)
|
| $67$ |
\( T^{5} + 5 T^{4} + \cdots + 248 \)
|
| $71$ |
\( T^{5} - 24 T^{4} + \cdots - 3968 \)
|
| $73$ |
\( T^{5} + 13 T^{4} + \cdots - 8 \)
|
| $79$ |
\( T^{5} - 6 T^{4} + \cdots + 16096 \)
|
| $83$ |
\( T^{5} - 22 T^{4} + \cdots - 105088 \)
|
| $89$ |
\( T^{5} + 14 T^{4} + \cdots - 6112 \)
|
| $97$ |
\( T^{5} + 20 T^{4} + \cdots - 256 \)
|
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