Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1568,3,Mod(1471,1568)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1568, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 0, 0]))
N = Newforms(chi, 3, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("1568.1471");
S:= CuspForms(chi, 3);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1568 = 2^{5} \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 3 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1568.d (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: | \(42.7249054517\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{7})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - 3x^{2} + 4 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2^{6} \) |
| Twist minimal: | no (minimal twist has level 224) |
| 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
\( x^{4} - 3x^{2} + 4 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu^{3} - \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( -\nu^{3} + 5\nu \)
|
| \(\beta_{3}\) | \(=\) |
\( 8\nu^{2} - 12 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{2} + \beta_1 ) / 4 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} + 12 ) / 8 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( \beta_{2} + 5\beta_1 ) / 4 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1568\mathbb{Z}\right)^\times\).
| \(n\) | \(197\) | \(1471\) | \(1473\) |
| \(\chi(n)\) | \(1\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1471.1 |
|
0 | − | 2.00000i | 0 | −3.29150 | 0 | 0 | 0 | 5.00000 | 0 | |||||||||||||||||||||||||||||
| 1471.2 | 0 | − | 2.00000i | 0 | 7.29150 | 0 | 0 | 0 | 5.00000 | 0 | ||||||||||||||||||||||||||||||
| 1471.3 | 0 | 2.00000i | 0 | −3.29150 | 0 | 0 | 0 | 5.00000 | 0 | |||||||||||||||||||||||||||||||
| 1471.4 | 0 | 2.00000i | 0 | 7.29150 | 0 | 0 | 0 | 5.00000 | 0 | |||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 4.b | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 1568.3.d.h | 4 | |
| 4.b | odd | 2 | 1 | inner | 1568.3.d.h | 4 | |
| 7.b | odd | 2 | 1 | 224.3.d.a | ✓ | 4 | |
| 21.c | even | 2 | 1 | 2016.3.m.a | 4 | ||
| 28.d | even | 2 | 1 | 224.3.d.a | ✓ | 4 | |
| 56.e | even | 2 | 1 | 448.3.d.c | 4 | ||
| 56.h | odd | 2 | 1 | 448.3.d.c | 4 | ||
| 84.h | odd | 2 | 1 | 2016.3.m.a | 4 | ||
| 112.j | even | 4 | 1 | 1792.3.g.a | 4 | ||
| 112.j | even | 4 | 1 | 1792.3.g.c | 4 | ||
| 112.l | odd | 4 | 1 | 1792.3.g.a | 4 | ||
| 112.l | odd | 4 | 1 | 1792.3.g.c | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 224.3.d.a | ✓ | 4 | 7.b | odd | 2 | 1 | |
| 224.3.d.a | ✓ | 4 | 28.d | even | 2 | 1 | |
| 448.3.d.c | 4 | 56.e | even | 2 | 1 | ||
| 448.3.d.c | 4 | 56.h | odd | 2 | 1 | ||
| 1568.3.d.h | 4 | 1.a | even | 1 | 1 | trivial | |
| 1568.3.d.h | 4 | 4.b | odd | 2 | 1 | inner | |
| 1792.3.g.a | 4 | 112.j | even | 4 | 1 | ||
| 1792.3.g.a | 4 | 112.l | odd | 4 | 1 | ||
| 1792.3.g.c | 4 | 112.j | even | 4 | 1 | ||
| 1792.3.g.c | 4 | 112.l | odd | 4 | 1 | ||
| 2016.3.m.a | 4 | 21.c | even | 2 | 1 | ||
| 2016.3.m.a | 4 | 84.h | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{3}^{\mathrm{new}}(1568, [\chi])\):
|
\( T_{3}^{2} + 4 \)
|
|
\( T_{5}^{2} - 4T_{5} - 24 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
|
| $3$ |
\( (T^{2} + 4)^{2} \)
|
| $5$ |
\( (T^{2} - 4 T - 24)^{2} \)
|
| $7$ |
\( T^{4} \)
|
| $11$ |
\( T^{4} + 256T^{2} + 9216 \)
|
| $13$ |
\( (T^{2} - 4 T - 248)^{2} \)
|
| $17$ |
\( (T^{2} - 28 T + 84)^{2} \)
|
| $19$ |
\( T^{4} + 1096 T^{2} + 121104 \)
|
| $23$ |
\( T^{4} + 512T^{2} + 1024 \)
|
| $29$ |
\( (T^{2} - 20 T - 908)^{2} \)
|
| $31$ |
\( (T^{2} + 16)^{2} \)
|
| $37$ |
\( (T^{2} - 68 T + 1044)^{2} \)
|
| $41$ |
\( (T^{2} - 60 T + 788)^{2} \)
|
| $43$ |
\( T^{4} + 5888 T^{2} + 7054336 \)
|
| $47$ |
\( T^{4} + 3488 T^{2} + 719104 \)
|
| $53$ |
\( (T^{2} + 140 T + 4452)^{2} \)
|
| $59$ |
\( T^{4} + 4232 T^{2} + 2155024 \)
|
| $61$ |
\( (T^{2} - 4 T - 248)^{2} \)
|
| $67$ |
\( T^{4} + 6752 T^{2} + 4946176 \)
|
| $71$ |
\( T^{4} + 11776 T^{2} + 5308416 \)
|
| $73$ |
\( (T^{2} - 76 T - 5724)^{2} \)
|
| $79$ |
\( (T^{2} + 11200)^{2} \)
|
| $83$ |
\( T^{4} + 15752 T^{2} + 35344 \)
|
| $89$ |
\( (T^{2} + 68 T - 636)^{2} \)
|
| $97$ |
\( (T^{2} - 300 T + 22388)^{2} \)
|
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