Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [154,4,Mod(1,154)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(154, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("154.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 154 = 2 \cdot 7 \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 154.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: | \(9.08629414088\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{37}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 9 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| 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 \(\beta = \sqrt{37}\). 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 | −3.08276 | 4.00000 | 19.0828 | 6.16553 | 7.00000 | −8.00000 | −17.4966 | −38.1655 | ||||||||||||||||||||||||
| 1.2 | −2.00000 | 9.08276 | 4.00000 | 6.91724 | −18.1655 | 7.00000 | −8.00000 | 55.4966 | −13.8345 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \( +1 \) |
| \(7\) | \( -1 \) |
| \(11\) | \( -1 \) |
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 | 154.4.a.g | ✓ | 2 |
| 3.b | odd | 2 | 1 | 1386.4.a.u | 2 | ||
| 4.b | odd | 2 | 1 | 1232.4.a.j | 2 | ||
| 7.b | odd | 2 | 1 | 1078.4.a.i | 2 | ||
| 11.b | odd | 2 | 1 | 1694.4.a.p | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 154.4.a.g | ✓ | 2 | 1.a | even | 1 | 1 | trivial |
| 1078.4.a.i | 2 | 7.b | odd | 2 | 1 | ||
| 1232.4.a.j | 2 | 4.b | odd | 2 | 1 | ||
| 1386.4.a.u | 2 | 3.b | odd | 2 | 1 | ||
| 1694.4.a.p | 2 | 11.b | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{2} - 6T_{3} - 28 \)
acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(154))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T + 2)^{2} \)
|
| $3$ |
\( T^{2} - 6T - 28 \)
|
| $5$ |
\( T^{2} - 26T + 132 \)
|
| $7$ |
\( (T - 7)^{2} \)
|
| $11$ |
\( (T - 11)^{2} \)
|
| $13$ |
\( T^{2} - 2T - 36 \)
|
| $17$ |
\( T^{2} + 88T + 1344 \)
|
| $19$ |
\( T^{2} - 42T - 12916 \)
|
| $23$ |
\( T^{2} - 160T + 5808 \)
|
| $29$ |
\( T^{2} - 24T - 1188 \)
|
| $31$ |
\( T^{2} - 248T + 8124 \)
|
| $37$ |
\( T^{2} + 52T - 28332 \)
|
| $41$ |
\( T^{2} - 528T + 48384 \)
|
| $43$ |
\( T^{2} + 204T + 3152 \)
|
| $47$ |
\( T^{2} - 24T - 299556 \)
|
| $53$ |
\( T^{2} - 248T - 62916 \)
|
| $59$ |
\( T^{2} - 570T + 54252 \)
|
| $61$ |
\( T^{2} + 1338 T + 427988 \)
|
| $67$ |
\( T^{2} + 180T - 34672 \)
|
| $71$ |
\( T^{2} + 60T - 831600 \)
|
| $73$ |
\( T^{2} + 4T - 7248 \)
|
| $79$ |
\( T^{2} + 1928 T + 796096 \)
|
| $83$ |
\( T^{2} + 542T - 704484 \)
|
| $89$ |
\( T^{2} + 140 T - 1595868 \)
|
| $97$ |
\( T^{2} + 2712 T + 1589948 \)
|
| show more | |
| show less |