Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [784,6,Mod(1,784)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(784, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("784.1");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 784 = 2^{4} \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 784.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: | \(125.740914733\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{57}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 14 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 7) |
| 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 \(\beta = \sqrt{57}\). 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 | −25.6495 | 0 | −28.7492 | 0 | 0 | 0 | 414.897 | 0 | ||||||||||||||||||||||||
| 1.2 | 0 | 19.6495 | 0 | 46.7492 | 0 | 0 | 0 | 143.103 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(7\) | \(-1\) |
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 | 784.6.a.v | 2 | |
| 4.b | odd | 2 | 1 | 49.6.a.f | 2 | ||
| 7.b | odd | 2 | 1 | 112.6.a.h | 2 | ||
| 12.b | even | 2 | 1 | 441.6.a.l | 2 | ||
| 21.c | even | 2 | 1 | 1008.6.a.bq | 2 | ||
| 28.d | even | 2 | 1 | 7.6.a.b | ✓ | 2 | |
| 28.f | even | 6 | 2 | 49.6.c.e | 4 | ||
| 28.g | odd | 6 | 2 | 49.6.c.d | 4 | ||
| 56.e | even | 2 | 1 | 448.6.a.w | 2 | ||
| 56.h | odd | 2 | 1 | 448.6.a.u | 2 | ||
| 84.h | odd | 2 | 1 | 63.6.a.f | 2 | ||
| 140.c | even | 2 | 1 | 175.6.a.c | 2 | ||
| 140.j | odd | 4 | 2 | 175.6.b.c | 4 | ||
| 308.g | odd | 2 | 1 | 847.6.a.c | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 7.6.a.b | ✓ | 2 | 28.d | even | 2 | 1 | |
| 49.6.a.f | 2 | 4.b | odd | 2 | 1 | ||
| 49.6.c.d | 4 | 28.g | odd | 6 | 2 | ||
| 49.6.c.e | 4 | 28.f | even | 6 | 2 | ||
| 63.6.a.f | 2 | 84.h | odd | 2 | 1 | ||
| 112.6.a.h | 2 | 7.b | odd | 2 | 1 | ||
| 175.6.a.c | 2 | 140.c | even | 2 | 1 | ||
| 175.6.b.c | 4 | 140.j | odd | 4 | 2 | ||
| 441.6.a.l | 2 | 12.b | even | 2 | 1 | ||
| 448.6.a.u | 2 | 56.h | odd | 2 | 1 | ||
| 448.6.a.w | 2 | 56.e | even | 2 | 1 | ||
| 784.6.a.v | 2 | 1.a | even | 1 | 1 | trivial | |
| 847.6.a.c | 2 | 308.g | odd | 2 | 1 | ||
| 1008.6.a.bq | 2 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{2} + 6T_{3} - 504 \)
acting on \(S_{6}^{\mathrm{new}}(\Gamma_0(784))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( T^{2} + 6T - 504 \)
|
| $5$ |
\( T^{2} - 18T - 1344 \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} + 396T - 179904 \)
|
| $13$ |
\( T^{2} - 350T - 195608 \)
|
| $17$ |
\( T^{2} + 1800 T + 727692 \)
|
| $19$ |
\( T^{2} + 3266 T + 2662072 \)
|
| $23$ |
\( T^{2} + 2088 T - 3507456 \)
|
| $29$ |
\( T^{2} - 6696 T + 10304172 \)
|
| $31$ |
\( T^{2} + 20T - 4155200 \)
|
| $37$ |
\( T^{2} - 6232 T + 5554156 \)
|
| $41$ |
\( T^{2} - 6048 T - 7848036 \)
|
| $43$ |
\( T^{2} - 3020 T - 324400352 \)
|
| $47$ |
\( T^{2} - 11700 T - 165954432 \)
|
| $53$ |
\( T^{2} - 9468 T + 21794244 \)
|
| $59$ |
\( T^{2} + 43938 T + 422751336 \)
|
| $61$ |
\( T^{2} - 64754 T + 719128816 \)
|
| $67$ |
\( T^{2} + 24784 T + 99708976 \)
|
| $71$ |
\( T^{2} + \cdots + 2121099264 \)
|
| $73$ |
\( T^{2} + 17452 T - 317520812 \)
|
| $79$ |
\( T^{2} + \cdots - 2508546944 \)
|
| $83$ |
\( T^{2} - 117558 T - 79919784 \)
|
| $89$ |
\( T^{2} + \cdots - 5252421468 \)
|
| $97$ |
\( T^{2} + \cdots - 1000631156 \)
|
| show more | |
| show less |