Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [507,4,Mod(1,507)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(507, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("507.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 507 = 3 \cdot 13^{2} \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 507.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: | \(29.9139683729\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | 4.4.1362828.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - 23x^{2} + 48 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 39) |
| 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 \(1,\beta_1,\beta_2,\beta_3\) 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
\( x^{4} - 23x^{2} + 48 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{3} - 19\nu ) / 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{2} - 12 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{3} + 12 \)
|
| \(\nu^{3}\) | \(=\) |
\( 2\beta_{2} + 19\beta_1 \)
|
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−4.54739 | 3.00000 | 12.6788 | −12.9118 | −13.6422 | −16.7289 | −21.2762 | 9.00000 | 58.7151 | ||||||||||||||||||||||||||||||
| 1.2 | −1.52356 | 3.00000 | −5.67878 | 9.65841 | −4.57067 | 22.3639 | 20.8404 | 9.00000 | −14.7151 | |||||||||||||||||||||||||||||||
| 1.3 | 1.52356 | 3.00000 | −5.67878 | −9.65841 | 4.57067 | −22.3639 | −20.8404 | 9.00000 | −14.7151 | |||||||||||||||||||||||||||||||
| 1.4 | 4.54739 | 3.00000 | 12.6788 | 12.9118 | 13.6422 | 16.7289 | 21.2762 | 9.00000 | 58.7151 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
| \(13\) | \(-1\) |
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 13.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 507.4.a.l | 4 | |
| 3.b | odd | 2 | 1 | 1521.4.a.w | 4 | ||
| 13.b | even | 2 | 1 | inner | 507.4.a.l | 4 | |
| 13.d | odd | 4 | 2 | 39.4.b.b | ✓ | 4 | |
| 39.d | odd | 2 | 1 | 1521.4.a.w | 4 | ||
| 39.f | even | 4 | 2 | 117.4.b.e | 4 | ||
| 52.f | even | 4 | 2 | 624.4.c.c | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 39.4.b.b | ✓ | 4 | 13.d | odd | 4 | 2 | |
| 117.4.b.e | 4 | 39.f | even | 4 | 2 | ||
| 507.4.a.l | 4 | 1.a | even | 1 | 1 | trivial | |
| 507.4.a.l | 4 | 13.b | even | 2 | 1 | inner | |
| 624.4.c.c | 4 | 52.f | even | 4 | 2 | ||
| 1521.4.a.w | 4 | 3.b | odd | 2 | 1 | ||
| 1521.4.a.w | 4 | 39.d | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(507))\):
|
\( T_{2}^{4} - 23T_{2}^{2} + 48 \)
|
|
\( T_{5}^{4} - 260T_{5}^{2} + 15552 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} - 23T^{2} + 48 \)
|
| $3$ |
\( (T - 3)^{4} \)
|
| $5$ |
\( T^{4} - 260 T^{2} + 15552 \)
|
| $7$ |
\( T^{4} - 780 T^{2} + 139968 \)
|
| $11$ |
\( T^{4} - 3152 T^{2} + 1572528 \)
|
| $13$ |
\( T^{4} \)
|
| $17$ |
\( (T^{2} + 48 T - 11556)^{2} \)
|
| $19$ |
\( T^{4} - 13884 T^{2} + 3048192 \)
|
| $23$ |
\( (T - 72)^{4} \)
|
| $29$ |
\( (T^{2} + 192 T - 2916)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 2389782528 \)
|
| $37$ |
\( T^{4} + \cdots + 2060577792 \)
|
| $41$ |
\( T^{4} + \cdots + 4431055872 \)
|
| $43$ |
\( (T^{2} - 644 T + 91552)^{2} \)
|
| $47$ |
\( T^{4} - 30128 T^{2} + 116663088 \)
|
| $53$ |
\( (T^{2} - 492 T - 133596)^{2} \)
|
| $59$ |
\( T^{4} - 62576 T^{2} + 457419312 \)
|
| $61$ |
\( (T^{2} - 144 T - 60868)^{2} \)
|
| $67$ |
\( T^{4} - 591948 T^{2} + 918330048 \)
|
| $71$ |
\( T^{4} + \cdots + 59484058032 \)
|
| $73$ |
\( T^{4} + \cdots + 179358354432 \)
|
| $79$ |
\( (T^{2} - 2160 T + 1144832)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 317023217328 \)
|
| $89$ |
\( T^{4} + \cdots + 78903164928 \)
|
| $97$ |
\( T^{4} - 137040 T^{2} + 725594112 \)
|
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