Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [930,4,Mod(1,930)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(930, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 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("930.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 930 = 2 \cdot 3 \cdot 5 \cdot 31 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 930.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: | \(54.8717763053\) |
| Analytic rank: | \(0\) |
| Dimension: | \(5\) |
| Coefficient field: | \(\mathbb{Q}[x]/(x^{5} - \cdots)\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - x^{4} - 494x^{3} - 3718x^{2} + 517x + 32927 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | yes |
| 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 \(1,\beta_1,\beta_2,\beta_3,\beta_4\) 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
\( x^{5} - x^{4} - 494x^{3} - 3718x^{2} + 517x + 32927 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 11\nu^{4} - 126\nu^{3} - 4492\nu^{2} + 7002\nu + 99293 ) / 2064 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -5\nu^{4} + 26\nu^{3} + 2292\nu^{2} + 9170\nu - 18051 ) / 688 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( -5\nu^{4} + 26\nu^{3} + 2464\nu^{2} + 7106\nu - 51591 ) / 344 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( 2\beta_{4} - 4\beta_{3} + 12\beta _1 + 195 \)
|
| \(\nu^{3}\) | \(=\) |
\( 16\beta_{4} - 54\beta_{3} - 30\beta_{2} + 491\beta _1 + 2426 \)
|
| \(\nu^{4}\) | \(=\) |
\( 1000\beta_{4} - 2252\beta_{3} - 156\beta_{2} + 9888\beta _1 + 98393 \)
|
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 |
|
2.00000 | 3.00000 | 4.00000 | −5.00000 | 6.00000 | −28.8371 | 8.00000 | 9.00000 | −10.0000 | |||||||||||||||||||||||||||||||||
| 1.2 | 2.00000 | 3.00000 | 4.00000 | −5.00000 | 6.00000 | −16.4449 | 8.00000 | 9.00000 | −10.0000 | ||||||||||||||||||||||||||||||||||
| 1.3 | 2.00000 | 3.00000 | 4.00000 | −5.00000 | 6.00000 | 8.86118 | 8.00000 | 9.00000 | −10.0000 | ||||||||||||||||||||||||||||||||||
| 1.4 | 2.00000 | 3.00000 | 4.00000 | −5.00000 | 6.00000 | 20.1239 | 8.00000 | 9.00000 | −10.0000 | ||||||||||||||||||||||||||||||||||
| 1.5 | 2.00000 | 3.00000 | 4.00000 | −5.00000 | 6.00000 | 31.2969 | 8.00000 | 9.00000 | −10.0000 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(-1\) |
| \(5\) | \(1\) |
| \(31\) | \(1\) |
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 | 930.4.a.q | ✓ | 5 |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 930.4.a.q | ✓ | 5 | 1.a | even | 1 | 1 | trivial |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{7}^{5} - 15T_{7}^{4} - 1170T_{7}^{3} + 14984T_{7}^{2} + 262038T_{7} - 2646600 \)
acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(930))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T - 2)^{5} \)
|
| $3$ |
\( (T - 3)^{5} \)
|
| $5$ |
\( (T + 5)^{5} \)
|
| $7$ |
\( T^{5} - 15 T^{4} + \cdots - 2646600 \)
|
| $11$ |
\( T^{5} - 69 T^{4} + \cdots - 40039104 \)
|
| $13$ |
\( T^{5} - 44 T^{4} + \cdots + 12185688 \)
|
| $17$ |
\( T^{5} + \cdots - 1265668128 \)
|
| $19$ |
\( T^{5} + \cdots - 1316491776 \)
|
| $23$ |
\( T^{5} + \cdots + 52072661184 \)
|
| $29$ |
\( T^{5} + \cdots - 525073286512 \)
|
| $31$ |
\( (T + 31)^{5} \)
|
| $37$ |
\( T^{5} + \cdots - 9623376496 \)
|
| $41$ |
\( T^{5} + \cdots - 591874905600 \)
|
| $43$ |
\( T^{5} + \cdots - 900849052256 \)
|
| $47$ |
\( T^{5} + \cdots - 1047370547520 \)
|
| $53$ |
\( T^{5} + \cdots - 6786713083640 \)
|
| $59$ |
\( T^{5} + \cdots - 59739243395968 \)
|
| $61$ |
\( T^{5} + \cdots - 8982536516064 \)
|
| $67$ |
\( T^{5} + \cdots + 12040755304816 \)
|
| $71$ |
\( T^{5} + \cdots + 21960803099520 \)
|
| $73$ |
\( T^{5} + \cdots - 110764568916 \)
|
| $79$ |
\( T^{5} + \cdots - 4431055019520 \)
|
| $83$ |
\( T^{5} + \cdots - 117941077956096 \)
|
| $89$ |
\( T^{5} + \cdots + 306408211164 \)
|
| $97$ |
\( T^{5} + \cdots - 12\!\cdots\!44 \)
|
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