Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [6223,2,Mod(1,6223)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(6223, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("6223.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 6223 = 7^{2} \cdot 127 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 6223.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: | \(49.6909051778\) |
| Analytic rank: | \(1\) |
| Dimension: | \(4\) |
| Coefficient field: | 4.4.3981.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} - 4x^{2} + 2x + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 889) |
| 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
\( x^{4} - x^{3} - 4x^{2} + 2x + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - \nu - 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{3} - \nu^{2} - 3\nu + 1 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + \beta _1 + 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} + \beta_{2} + 4\beta _1 + 1 \)
|
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−2.14012 | −0.318459 | 2.58013 | −2.82166 | 0.681541 | 0 | −1.24154 | −2.89858 | 6.03871 | ||||||||||||||||||||||||||||||
| 1.2 | 0.428833 | −1.75080 | −1.81610 | 1.17963 | −0.750800 | 0 | −1.63647 | 0.0653021 | 0.505865 | |||||||||||||||||||||||||||||||
| 1.3 | 1.43783 | 2.28400 | 0.0673516 | −1.84617 | 3.28400 | 0 | −2.77882 | 2.21665 | −2.65448 | |||||||||||||||||||||||||||||||
| 1.4 | 2.27346 | 0.785261 | 3.16863 | 0.488200 | 1.78526 | 0 | 2.65683 | −2.38336 | 1.10990 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(7\) | \( -1 \) |
| \(127\) | \( -1 \) |
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 | 6223.2.a.g | 4 | |
| 7.b | odd | 2 | 1 | 6223.2.a.f | 4 | ||
| 7.d | odd | 6 | 2 | 889.2.f.b | ✓ | 8 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 889.2.f.b | ✓ | 8 | 7.d | odd | 6 | 2 | |
| 6223.2.a.f | 4 | 7.b | odd | 2 | 1 | ||
| 6223.2.a.g | 4 | 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(6223))\):
|
\( T_{2}^{4} - 2T_{2}^{3} - 4T_{2}^{2} + 9T_{2} - 3 \)
|
|
\( T_{3}^{4} - T_{3}^{3} - 4T_{3}^{2} + 2T_{3} + 1 \)
|
|
\( T_{5}^{4} + 3T_{5}^{3} - 2T_{5}^{2} - 6T_{5} + 3 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} - 2 T^{3} + \cdots - 3 \)
|
| $3$ |
\( T^{4} - T^{3} - 4 T^{2} + \cdots + 1 \)
|
| $5$ |
\( T^{4} + 3 T^{3} + \cdots + 3 \)
|
| $7$ |
\( T^{4} \)
|
| $11$ |
\( T^{4} - 3 T^{3} + \cdots + 201 \)
|
| $13$ |
\( T^{4} - 3 T^{3} + \cdots - 73 \)
|
| $17$ |
\( T^{4} + 6 T^{3} + \cdots - 393 \)
|
| $19$ |
\( T^{4} - T^{3} + \cdots - 13 \)
|
| $23$ |
\( T^{4} + 11 T^{3} + \cdots - 1119 \)
|
| $29$ |
\( T^{4} - 8 T^{2} + \cdots + 9 \)
|
| $31$ |
\( T^{4} + 14 T^{3} + \cdots - 809 \)
|
| $37$ |
\( T^{4} + 3 T^{3} + \cdots + 83 \)
|
| $41$ |
\( T^{4} - 107 T^{2} + \cdots + 1161 \)
|
| $43$ |
\( T^{4} - 18 T^{3} + \cdots + 125 \)
|
| $47$ |
\( T^{4} + 12 T^{3} + \cdots - 999 \)
|
| $53$ |
\( T^{4} - 13 T^{3} + \cdots + 15 \)
|
| $59$ |
\( T^{4} + 10 T^{3} + \cdots - 111 \)
|
| $61$ |
\( T^{4} + 14 T^{3} + \cdots - 2357 \)
|
| $67$ |
\( T^{4} + 10 T^{3} + \cdots + 6064 \)
|
| $71$ |
\( T^{4} - 8 T^{3} + \cdots + 720 \)
|
| $73$ |
\( T^{4} + 29 T^{3} + \cdots - 1117 \)
|
| $79$ |
\( T^{4} - 36 T^{3} + \cdots + 5521 \)
|
| $83$ |
\( T^{4} + 11 T^{3} + \cdots + 4419 \)
|
| $89$ |
\( T^{4} + 6 T^{3} + \cdots + 48 \)
|
| $97$ |
\( T^{4} + 6 T^{3} + \cdots - 400 \)
|
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