Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [280,4,Mod(1,280)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(280, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 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("280.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 280 = 2^{3} \cdot 5 \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 280.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: | \(16.5205348016\) |
| Analytic rank: | \(1\) |
| Dimension: | \(3\) |
| Coefficient field: | 3.3.11045.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{3} - x^{2} - 31x - 54 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2^{2} \) |
| 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 \(1,\beta_1,\beta_2\) 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
\( x^{3} - x^{2} - 31x - 54 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu^{2} - 3\nu - 20 \)
|
| \(\beta_{2}\) | \(=\) |
\( -2\nu^{2} + 10\nu + 39 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{2} + 2\beta _1 + 1 ) / 4 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 3\beta_{2} + 10\beta _1 + 83 ) / 4 \)
|
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 |
|
0 | −9.69516 | 0 | −5.00000 | 0 | 7.00000 | 0 | 66.9961 | 0 | |||||||||||||||||||||||||||
| 1.2 | 0 | 0.238730 | 0 | −5.00000 | 0 | 7.00000 | 0 | −26.9430 | 0 | ||||||||||||||||||||||||||||
| 1.3 | 0 | 3.45643 | 0 | −5.00000 | 0 | 7.00000 | 0 | −15.0531 | 0 | ||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \( +1 \) |
| \(5\) | \( +1 \) |
| \(7\) | \( -1 \) |
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 | 280.4.a.f | ✓ | 3 |
| 4.b | odd | 2 | 1 | 560.4.a.w | 3 | ||
| 5.b | even | 2 | 1 | 1400.4.a.m | 3 | ||
| 5.c | odd | 4 | 2 | 1400.4.g.l | 6 | ||
| 7.b | odd | 2 | 1 | 1960.4.a.r | 3 | ||
| 8.b | even | 2 | 1 | 2240.4.a.bz | 3 | ||
| 8.d | odd | 2 | 1 | 2240.4.a.br | 3 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 280.4.a.f | ✓ | 3 | 1.a | even | 1 | 1 | trivial |
| 560.4.a.w | 3 | 4.b | odd | 2 | 1 | ||
| 1400.4.a.m | 3 | 5.b | even | 2 | 1 | ||
| 1400.4.g.l | 6 | 5.c | odd | 4 | 2 | ||
| 1960.4.a.r | 3 | 7.b | odd | 2 | 1 | ||
| 2240.4.a.br | 3 | 8.d | odd | 2 | 1 | ||
| 2240.4.a.bz | 3 | 8.b | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{3} + 6T_{3}^{2} - 35T_{3} + 8 \)
acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(280))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{3} \)
|
| $3$ |
\( T^{3} + 6 T^{2} + \cdots + 8 \)
|
| $5$ |
\( (T + 5)^{3} \)
|
| $7$ |
\( (T - 7)^{3} \)
|
| $11$ |
\( T^{3} + 6 T^{2} + \cdots - 24620 \)
|
| $13$ |
\( T^{3} - 8 T^{2} + \cdots - 20410 \)
|
| $17$ |
\( T^{3} + 52 T^{2} + \cdots + 10134 \)
|
| $19$ |
\( T^{3} + 152 T^{2} + \cdots - 2087776 \)
|
| $23$ |
\( T^{3} + 48 T^{2} + \cdots - 1469824 \)
|
| $29$ |
\( T^{3} + 468 T^{2} + \cdots - 3237134 \)
|
| $31$ |
\( T^{3} + 268 T^{2} + \cdots - 921984 \)
|
| $37$ |
\( T^{3} - 262 T^{2} + \cdots + 11050616 \)
|
| $41$ |
\( T^{3} + 74 T^{2} + \cdots - 3221920 \)
|
| $43$ |
\( T^{3} + 692 T^{2} + \cdots + 3560240 \)
|
| $47$ |
\( T^{3} + 774 T^{2} + \cdots + 8510472 \)
|
| $53$ |
\( T^{3} - 62 T^{2} + \cdots - 5800160 \)
|
| $59$ |
\( T^{3} + 1088 T^{2} + \cdots + 19501056 \)
|
| $61$ |
\( T^{3} - 174 T^{2} + \cdots + 187440544 \)
|
| $67$ |
\( T^{3} - 212 T^{2} + \cdots - 41574080 \)
|
| $71$ |
\( T^{3} + 1056 T^{2} + \cdots - 270950400 \)
|
| $73$ |
\( T^{3} + 194 T^{2} + \cdots + 80306840 \)
|
| $79$ |
\( T^{3} - 362 T^{2} + \cdots + 362644136 \)
|
| $83$ |
\( T^{3} + 1696 T^{2} + \cdots + 90044928 \)
|
| $89$ |
\( T^{3} - 158 T^{2} + \cdots + 860463840 \)
|
| $97$ |
\( T^{3} + \cdots + 2380431942 \)
|
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