Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2070,4,Mod(1,2070)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2070, 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("2070.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2070 = 2 \cdot 3^{2} \cdot 5 \cdot 23 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2070.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: | \(122.133953712\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{41}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 10 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| 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 \(\beta = \sqrt{41}\). We also show the integral \(q\)-expansion of the trace form.
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 | 0 | 4.00000 | 5.00000 | 0 | −19.4031 | 8.00000 | 0 | 10.0000 | ||||||||||||||||||||||||
| 1.2 | 2.00000 | 0 | 4.00000 | 5.00000 | 0 | −6.59688 | 8.00000 | 0 | 10.0000 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(1\) |
| \(5\) | \(-1\) |
| \(23\) | \(-1\) |
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 | 2070.4.a.t | yes | 2 |
| 3.b | odd | 2 | 1 | 2070.4.a.p | ✓ | 2 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 2070.4.a.p | ✓ | 2 | 3.b | odd | 2 | 1 | |
| 2070.4.a.t | yes | 2 | 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 \(S_{4}^{\mathrm{new}}(\Gamma_0(2070))\):
|
\( T_{7}^{2} + 26T_{7} + 128 \)
|
|
\( T_{11}^{2} - 64T_{11} + 368 \)
|
|
\( T_{17}^{2} + 66T_{17} - 3872 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T - 2)^{2} \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( (T - 5)^{2} \)
|
| $7$ |
\( T^{2} + 26T + 128 \)
|
| $11$ |
\( T^{2} - 64T + 368 \)
|
| $13$ |
\( T^{2} + 110T + 2656 \)
|
| $17$ |
\( T^{2} + 66T - 3872 \)
|
| $19$ |
\( T^{2} + 4T - 1472 \)
|
| $23$ |
\( (T - 23)^{2} \)
|
| $29$ |
\( T^{2} - 158T - 38408 \)
|
| $31$ |
\( T^{2} + 108T - 33984 \)
|
| $37$ |
\( T^{2} + 666T + 109864 \)
|
| $41$ |
\( T^{2} - 380T - 800 \)
|
| $43$ |
\( T^{2} + 618T + 77400 \)
|
| $47$ |
\( T^{2} - 136T - 284672 \)
|
| $53$ |
\( T^{2} + 152T - 21940 \)
|
| $59$ |
\( T^{2} - 228T + 2500 \)
|
| $61$ |
\( T^{2} - 142T - 20584 \)
|
| $67$ |
\( T^{2} + 574T - 422792 \)
|
| $71$ |
\( T^{2} + 614T + 3680 \)
|
| $73$ |
\( T^{2} + 400T - 530884 \)
|
| $79$ |
\( T^{2} + 1394 T + 312584 \)
|
| $83$ |
\( T^{2} + 1426 T + 505048 \)
|
| $89$ |
\( T^{2} + 112T - 359140 \)
|
| $97$ |
\( T^{2} + 2278 T + 1154600 \)
|
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