Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [384,4,Mod(1,384)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(384, 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("384.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 384 = 2^{7} \cdot 3 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 384.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: | \(22.6567334422\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{15}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - 15 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| 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 \(\beta = 4\sqrt{15}\). 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 |
|
0 | 3.00000 | 0 | −11.4919 | 0 | −13.4919 | 0 | 9.00000 | 0 | ||||||||||||||||||||||||
| 1.2 | 0 | 3.00000 | 0 | 19.4919 | 0 | 17.4919 | 0 | 9.00000 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(-1\) |
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 | 384.4.a.o | yes | 2 |
| 3.b | odd | 2 | 1 | 1152.4.a.p | 2 | ||
| 4.b | odd | 2 | 1 | 384.4.a.k | yes | 2 | |
| 8.b | even | 2 | 1 | 384.4.a.j | ✓ | 2 | |
| 8.d | odd | 2 | 1 | 384.4.a.n | yes | 2 | |
| 12.b | even | 2 | 1 | 1152.4.a.o | 2 | ||
| 16.e | even | 4 | 2 | 768.4.d.q | 4 | ||
| 16.f | odd | 4 | 2 | 768.4.d.t | 4 | ||
| 24.f | even | 2 | 1 | 1152.4.a.u | 2 | ||
| 24.h | odd | 2 | 1 | 1152.4.a.v | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 384.4.a.j | ✓ | 2 | 8.b | even | 2 | 1 | |
| 384.4.a.k | yes | 2 | 4.b | odd | 2 | 1 | |
| 384.4.a.n | yes | 2 | 8.d | odd | 2 | 1 | |
| 384.4.a.o | yes | 2 | 1.a | even | 1 | 1 | trivial |
| 768.4.d.q | 4 | 16.e | even | 4 | 2 | ||
| 768.4.d.t | 4 | 16.f | odd | 4 | 2 | ||
| 1152.4.a.o | 2 | 12.b | even | 2 | 1 | ||
| 1152.4.a.p | 2 | 3.b | odd | 2 | 1 | ||
| 1152.4.a.u | 2 | 24.f | even | 2 | 1 | ||
| 1152.4.a.v | 2 | 24.h | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(384))\):
|
\( T_{5}^{2} - 8T_{5} - 224 \)
|
|
\( T_{7}^{2} - 4T_{7} - 236 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( (T - 3)^{2} \)
|
| $5$ |
\( T^{2} - 8T - 224 \)
|
| $7$ |
\( T^{2} - 4T - 236 \)
|
| $11$ |
\( T^{2} - 40T - 560 \)
|
| $13$ |
\( (T - 2)^{2} \)
|
| $17$ |
\( T^{2} - 28T - 8444 \)
|
| $19$ |
\( T^{2} - 112T + 2176 \)
|
| $23$ |
\( T^{2} + 56T - 7856 \)
|
| $29$ |
\( T^{2} + 144T - 35376 \)
|
| $31$ |
\( T^{2} - 276T + 7284 \)
|
| $37$ |
\( T^{2} + 580T + 83140 \)
|
| $41$ |
\( T^{2} - 588T + 85476 \)
|
| $43$ |
\( T^{2} + 96T - 113856 \)
|
| $47$ |
\( T^{2} - 712T + 125776 \)
|
| $53$ |
\( T^{2} + 1104 T + 304464 \)
|
| $59$ |
\( T^{2} - 536T - 66416 \)
|
| $61$ |
\( T^{2} + 452T - 111164 \)
|
| $67$ |
\( T^{2} - 296T - 730736 \)
|
| $71$ |
\( T^{2} - 216T + 3024 \)
|
| $73$ |
\( T^{2} - 364T - 615836 \)
|
| $79$ |
\( T^{2} - 1076 T + 235444 \)
|
| $83$ |
\( T^{2} - 648T - 817584 \)
|
| $89$ |
\( T^{2} - 2308 T + 1235716 \)
|
| $97$ |
\( T^{2} + 1900 T + 806500 \)
|
| show more | |
| show less |