Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [8028,2,Mod(1,8028)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(8028, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("8028.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 8028 = 2^{2} \cdot 3^{2} \cdot 223 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 8028.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: | \(64.1039027427\) |
| Analytic rank: | \(0\) |
| Dimension: | \(5\) |
| Coefficient field: | 5.5.1710888.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - x^{4} - 10x^{3} + 3x^{2} + 12x + 4 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 2676) |
| 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
\( x^{5} - x^{4} - 10x^{3} + 3x^{2} + 12x + 4 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{4} - \nu^{3} - 10\nu^{2} + 5\nu + 10 ) / 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -3\nu^{4} + 5\nu^{3} + 28\nu^{2} - 27\nu - 26 ) / 2 \)
|
| \(\beta_{4}\) | \(=\) |
\( -2\nu^{4} + 3\nu^{3} + 18\nu^{2} - 15\nu - 13 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( -\beta_{4} + \beta_{3} - \beta_{2} + \beta _1 + 5 \)
|
| \(\nu^{3}\) | \(=\) |
\( -\beta_{4} + 2\beta_{3} + 2\beta_{2} + 7\beta _1 + 3 \)
|
| \(\nu^{4}\) | \(=\) |
\( -11\beta_{4} + 12\beta_{3} - 6\beta_{2} + 12\beta _1 + 43 \)
|
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 | 0 | 0 | −1.40326 | 0 | −1.61825 | 0 | 0 | 0 | |||||||||||||||||||||||||||||||||
| 1.2 | 0 | 0 | 0 | −0.594895 | 0 | 2.48438 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||
| 1.3 | 0 | 0 | 0 | 0.756442 | 0 | 1.69379 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||
| 1.4 | 0 | 0 | 0 | 2.95619 | 0 | −3.03905 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||
| 1.5 | 0 | 0 | 0 | 4.28552 | 0 | 3.47913 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(-1\) |
| \(223\) | \(-1\) |
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 | 8028.2.a.i | 5 | |
| 3.b | odd | 2 | 1 | 2676.2.a.c | ✓ | 5 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 2676.2.a.c | ✓ | 5 | 3.b | odd | 2 | 1 | |
| 8028.2.a.i | 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(8028))\):
|
\( T_{5}^{5} - 6T_{5}^{4} + 3T_{5}^{3} + 20T_{5}^{2} - 4T_{5} - 8 \)
|
|
\( T_{7}^{5} - 3T_{7}^{4} - 12T_{7}^{3} + 35T_{7}^{2} + 24T_{7} - 72 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} \)
|
| $3$ |
\( T^{5} \)
|
| $5$ |
\( T^{5} - 6 T^{4} + \cdots - 8 \)
|
| $7$ |
\( T^{5} - 3 T^{4} + \cdots - 72 \)
|
| $11$ |
\( T^{5} \)
|
| $13$ |
\( T^{5} \)
|
| $17$ |
\( T^{5} - 13 T^{4} + \cdots + 1252 \)
|
| $19$ |
\( T^{5} + T^{4} + \cdots - 576 \)
|
| $23$ |
\( T^{5} + 4 T^{4} + \cdots - 864 \)
|
| $29$ |
\( T^{5} + 11 T^{4} + \cdots + 4768 \)
|
| $31$ |
\( T^{5} + 3 T^{4} + \cdots + 36 \)
|
| $37$ |
\( T^{5} - 7 T^{4} + \cdots - 571 \)
|
| $41$ |
\( T^{5} - 17 T^{4} + \cdots - 72 \)
|
| $43$ |
\( T^{5} - 15 T^{4} + \cdots - 31968 \)
|
| $47$ |
\( T^{5} - 25 T^{4} + \cdots + 961 \)
|
| $53$ |
\( T^{5} - 3 T^{4} + \cdots - 8524 \)
|
| $59$ |
\( T^{5} - 14 T^{4} + \cdots - 576 \)
|
| $61$ |
\( T^{5} + 18 T^{4} + \cdots + 1728 \)
|
| $67$ |
\( T^{5} - 24 T^{4} + \cdots - 19816 \)
|
| $71$ |
\( T^{5} - 14 T^{4} + \cdots - 1728 \)
|
| $73$ |
\( T^{5} + 23 T^{4} + \cdots - 23633 \)
|
| $79$ |
\( T^{5} - 14 T^{4} + \cdots + 35800 \)
|
| $83$ |
\( T^{5} - 15 T^{4} + \cdots - 46251 \)
|
| $89$ |
\( T^{5} - 25 T^{4} + \cdots - 10800 \)
|
| $97$ |
\( T^{5} + 12 T^{4} + \cdots + 13824 \)
|
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