Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [192,13,Mod(127,192)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(192, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 0, 0]))
N = Newforms(chi, 13, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("192.127");
S:= CuspForms(chi, 13);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 192 = 2^{6} \cdot 3 \) |
| Weight: | \( k \) | \(=\) | \( 13 \) |
| Character orbit: | \([\chi]\) | \(=\) | 192.g (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: | \(175.486812917\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\mathbb{Q}[x]/(x^{4} - \cdots)\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} + 54691x^{2} + 54690x + 2990996100 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2^{10}\cdot 3^{2} \) |
| Twist minimal: | no (minimal twist has level 48) |
| 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
\( x^{4} - x^{3} + 54691x^{2} + 54690x + 2990996100 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( -\nu^{3} + 54691\nu^{2} - 54691\nu + 1495470705 ) / 1495525395 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 48\nu^{3} + 3937704 ) / 54691 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 8\nu^{3} - 8\nu^{2} + 875048\nu + 218760 ) / 9115 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{3} - \beta_{2} + 24\beta _1 + 24 ) / 96 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} + \beta_{2} + 2625144\beta _1 - 2625144 ) / 96 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 54691\beta_{2} - 3937704 ) / 48 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/192\mathbb{Z}\right)^\times\).
| \(n\) | \(65\) | \(127\) | \(133\) |
| \(\chi(n)\) | \(1\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 127.1 |
|
0 | − | 420.888i | 0 | −18839.3 | 0 | − | 202122.i | 0 | −177147. | 0 | ||||||||||||||||||||||||||||
| 127.2 | 0 | − | 420.888i | 0 | 3611.25 | 0 | 147847.i | 0 | −177147. | 0 | ||||||||||||||||||||||||||||||
| 127.3 | 0 | 420.888i | 0 | −18839.3 | 0 | 202122.i | 0 | −177147. | 0 | |||||||||||||||||||||||||||||||
| 127.4 | 0 | 420.888i | 0 | 3611.25 | 0 | − | 147847.i | 0 | −177147. | 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 | 192.13.g.a | 4 | |
| 4.b | odd | 2 | 1 | inner | 192.13.g.a | 4 | |
| 8.b | even | 2 | 1 | 48.13.g.c | ✓ | 4 | |
| 8.d | odd | 2 | 1 | 48.13.g.c | ✓ | 4 | |
| 24.f | even | 2 | 1 | 144.13.g.e | 4 | ||
| 24.h | odd | 2 | 1 | 144.13.g.e | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 48.13.g.c | ✓ | 4 | 8.b | even | 2 | 1 | |
| 48.13.g.c | ✓ | 4 | 8.d | odd | 2 | 1 | |
| 144.13.g.e | 4 | 24.f | even | 2 | 1 | ||
| 144.13.g.e | 4 | 24.h | odd | 2 | 1 | ||
| 192.13.g.a | 4 | 1.a | even | 1 | 1 | trivial | |
| 192.13.g.a | 4 | 4.b | odd | 2 | 1 | inner | |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{2} + 15228T_{5} - 68033340 \)
acting on \(S_{13}^{\mathrm{new}}(192, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
|
| $3$ |
\( (T^{2} + 177147)^{2} \)
|
| $5$ |
\( (T^{2} + 15228 T - 68033340)^{2} \)
|
| $7$ |
\( T^{4} + \cdots + 89\!\cdots\!76 \)
|
| $11$ |
\( T^{4} + \cdots + 18\!\cdots\!04 \)
|
| $13$ |
\( (T^{2} - 5965324 T - 289589288156)^{2} \)
|
| $17$ |
\( (T^{2} + \cdots - 101535278863068)^{2} \)
|
| $19$ |
\( T^{4} + \cdots + 71\!\cdots\!56 \)
|
| $23$ |
\( T^{4} + \cdots + 80\!\cdots\!00 \)
|
| $29$ |
\( (T^{2} + \cdots - 61\!\cdots\!20)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 76\!\cdots\!84 \)
|
| $37$ |
\( (T^{2} + \cdots + 83\!\cdots\!80)^{2} \)
|
| $41$ |
\( (T^{2} + \cdots - 39\!\cdots\!68)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 14\!\cdots\!16 \)
|
| $47$ |
\( T^{4} + \cdots + 13\!\cdots\!56 \)
|
| $53$ |
\( (T^{2} + \cdots + 14\!\cdots\!04)^{2} \)
|
| $59$ |
\( T^{4} + \cdots + 10\!\cdots\!64 \)
|
| $61$ |
\( (T^{2} + \cdots + 77\!\cdots\!20)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 91\!\cdots\!96 \)
|
| $71$ |
\( T^{4} + \cdots + 36\!\cdots\!56 \)
|
| $73$ |
\( (T^{2} + \cdots - 40\!\cdots\!36)^{2} \)
|
| $79$ |
\( T^{4} + \cdots + 11\!\cdots\!00 \)
|
| $83$ |
\( T^{4} + \cdots + 28\!\cdots\!64 \)
|
| $89$ |
\( (T^{2} + \cdots - 18\!\cdots\!04)^{2} \)
|
| $97$ |
\( (T^{2} + \cdots + 28\!\cdots\!96)^{2} \)
|
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