Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [325,4,Mod(274,325)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(325, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("325.274");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 325 = 5^{2} \cdot 13 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 325.b (of order \(2\), degree \(1\), not 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: | \(19.1756207519\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| 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: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 65) |
| 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
| \(\beta_{1}\) | \(=\) |
\( \zeta_{12}^{3} \)
|
| \(\beta_{2}\) | \(=\) |
\( 2\zeta_{12}^{2} - 1 \)
|
| \(\beta_{3}\) | \(=\) |
\( -\zeta_{12}^{3} + 2\zeta_{12} \)
|
| \(\zeta_{12}\) | \(=\) |
\( ( \beta_{3} + \beta_1 ) / 2 \)
|
| \(\zeta_{12}^{2}\) | \(=\) |
\( ( \beta_{2} + 1 ) / 2 \)
|
| \(\zeta_{12}^{3}\) | \(=\) |
\( \beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/325\mathbb{Z}\right)^\times\).
| \(n\) | \(27\) | \(301\) |
| \(\chi(n)\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 274.1 |
|
− | 3.73205i | − | 10.1962i | −5.92820 | 0 | −38.0526 | 24.9282i | − | 7.73205i | −76.9615 | 0 | |||||||||||||||||||||||||||
| 274.2 | − | 0.267949i | 0.196152i | 7.92820 | 0 | 0.0525589 | 11.0718i | − | 4.26795i | 26.9615 | 0 | |||||||||||||||||||||||||||||
| 274.3 | 0.267949i | − | 0.196152i | 7.92820 | 0 | 0.0525589 | − | 11.0718i | 4.26795i | 26.9615 | 0 | |||||||||||||||||||||||||||||
| 274.4 | 3.73205i | 10.1962i | −5.92820 | 0 | −38.0526 | − | 24.9282i | 7.73205i | −76.9615 | 0 | ||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 5.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 325.4.b.c | 4 | |
| 5.b | even | 2 | 1 | inner | 325.4.b.c | 4 | |
| 5.c | odd | 4 | 1 | 65.4.a.d | ✓ | 2 | |
| 5.c | odd | 4 | 1 | 325.4.a.e | 2 | ||
| 15.e | even | 4 | 1 | 585.4.a.f | 2 | ||
| 20.e | even | 4 | 1 | 1040.4.a.o | 2 | ||
| 65.h | odd | 4 | 1 | 845.4.a.c | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 65.4.a.d | ✓ | 2 | 5.c | odd | 4 | 1 | |
| 325.4.a.e | 2 | 5.c | odd | 4 | 1 | ||
| 325.4.b.c | 4 | 1.a | even | 1 | 1 | trivial | |
| 325.4.b.c | 4 | 5.b | even | 2 | 1 | inner | |
| 585.4.a.f | 2 | 15.e | even | 4 | 1 | ||
| 845.4.a.c | 2 | 65.h | odd | 4 | 1 | ||
| 1040.4.a.o | 2 | 20.e | even | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(325, [\chi])\):
|
\( T_{2}^{4} + 14T_{2}^{2} + 1 \)
|
|
\( T_{3}^{4} + 104T_{3}^{2} + 4 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + 14T^{2} + 1 \)
|
| $3$ |
\( T^{4} + 104T^{2} + 4 \)
|
| $5$ |
\( T^{4} \)
|
| $7$ |
\( T^{4} + 744 T^{2} + 76176 \)
|
| $11$ |
\( (T^{2} + 10 T - 2)^{2} \)
|
| $13$ |
\( (T^{2} + 169)^{2} \)
|
| $17$ |
\( T^{4} + 5432 T^{2} + 7246864 \)
|
| $19$ |
\( (T^{2} - 14 T - 818)^{2} \)
|
| $23$ |
\( T^{4} + 632 T^{2} + 68644 \)
|
| $29$ |
\( (T^{2} + 116 T + 1336)^{2} \)
|
| $31$ |
\( (T^{2} + 106 T - 41114)^{2} \)
|
| $37$ |
\( T^{4} + \cdots + 9005250816 \)
|
| $41$ |
\( (T^{2} + 120 T - 56892)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 16142718916 \)
|
| $47$ |
\( T^{4} + \cdots + 1006919824 \)
|
| $53$ |
\( T^{4} + \cdots + 4716392976 \)
|
| $59$ |
\( (T^{2} + 342 T - 104322)^{2} \)
|
| $61$ |
\( (T^{2} + 268 T - 6344)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 183728820496 \)
|
| $71$ |
\( (T^{2} - 234 T - 44274)^{2} \)
|
| $73$ |
\( T^{4} + 116448 T^{2} + 3154176 \)
|
| $79$ |
\( (T^{2} - 868 T - 138344)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 87003761296 \)
|
| $89$ |
\( (T^{2} + 2180 T + 932308)^{2} \)
|
| $97$ |
\( T^{4} + \cdots + 1792588943376 \)
|
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