Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [414,8,Mod(1,414)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(414, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 8, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("414.1");
S:= CuspForms(chi, 8);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 414 = 2 \cdot 3^{2} \cdot 23 \) |
| Weight: | \( k \) | \(=\) | \( 8 \) |
| Character orbit: | \([\chi]\) | \(=\) | 414.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: | \(129.327400550\) |
| Analytic rank: | \(1\) |
| 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: |
\( x^{4} - 5167x^{2} - 24752x + 5245058 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2^{4} \) |
| Twist minimal: | no (minimal twist has level 138) |
| 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
\( x^{4} - 5167x^{2} - 24752x + 5245058 \)
:
| \(\beta_{1}\) | \(=\) |
\( 4\nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -\nu^{3} + 77\nu^{2} + 2766\nu - 180439 ) / 147 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 2\nu^{3} - 56\nu^{2} - 5826\nu + 107548 ) / 49 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_1 ) / 4 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 2\beta_{3} + 12\beta_{2} + 3\beta _1 + 10340 ) / 4 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 154\beta_{3} + 336\beta_{2} + 2997\beta _1 + 74424 ) / 4 \)
|
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 |
|
−8.00000 | 0 | 64.0000 | −499.132 | 0 | −1792.39 | −512.000 | 0 | 3993.06 | ||||||||||||||||||||||||||||||
| 1.2 | −8.00000 | 0 | 64.0000 | −302.129 | 0 | 1118.77 | −512.000 | 0 | 2417.03 | |||||||||||||||||||||||||||||||
| 1.3 | −8.00000 | 0 | 64.0000 | −7.78122 | 0 | 1390.34 | −512.000 | 0 | 62.2498 | |||||||||||||||||||||||||||||||
| 1.4 | −8.00000 | 0 | 64.0000 | 467.042 | 0 | −746.713 | −512.000 | 0 | −3736.34 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(1\) |
| \(3\) | \(-1\) |
| \(23\) | \(1\) |
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 | 414.8.a.h | 4 | |
| 3.b | odd | 2 | 1 | 138.8.a.g | ✓ | 4 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 138.8.a.g | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 414.8.a.h | 4 | 1.a | even | 1 | 1 | trivial | |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{4} + 342T_{5}^{3} - 220820T_{5}^{2} - 72169600T_{5} - 548040000 \)
acting on \(S_{8}^{\mathrm{new}}(\Gamma_0(414))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T + 8)^{4} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} + 342 T^{3} + \cdots - 548040000 \)
|
| $7$ |
\( T^{4} + \cdots + 2081845392656 \)
|
| $11$ |
\( T^{4} + \cdots + 134485790256000 \)
|
| $13$ |
\( T^{4} + \cdots + 850718415501872 \)
|
| $17$ |
\( T^{4} + \cdots + 17\!\cdots\!80 \)
|
| $19$ |
\( T^{4} + \cdots - 69\!\cdots\!28 \)
|
| $23$ |
\( (T + 12167)^{4} \)
|
| $29$ |
\( T^{4} + \cdots - 52\!\cdots\!56 \)
|
| $31$ |
\( T^{4} + \cdots - 42\!\cdots\!24 \)
|
| $37$ |
\( T^{4} + \cdots - 83\!\cdots\!00 \)
|
| $41$ |
\( T^{4} + \cdots + 12\!\cdots\!08 \)
|
| $43$ |
\( T^{4} + \cdots + 58\!\cdots\!56 \)
|
| $47$ |
\( T^{4} + \cdots - 52\!\cdots\!20 \)
|
| $53$ |
\( T^{4} + \cdots + 10\!\cdots\!16 \)
|
| $59$ |
\( T^{4} + \cdots + 17\!\cdots\!12 \)
|
| $61$ |
\( T^{4} + \cdots + 19\!\cdots\!00 \)
|
| $67$ |
\( T^{4} + \cdots - 38\!\cdots\!08 \)
|
| $71$ |
\( T^{4} + \cdots + 11\!\cdots\!20 \)
|
| $73$ |
\( T^{4} + \cdots + 28\!\cdots\!16 \)
|
| $79$ |
\( T^{4} + \cdots + 40\!\cdots\!20 \)
|
| $83$ |
\( T^{4} + \cdots - 49\!\cdots\!00 \)
|
| $89$ |
\( T^{4} + \cdots + 11\!\cdots\!04 \)
|
| $97$ |
\( T^{4} + \cdots + 11\!\cdots\!80 \)
|
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