Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [169,4,Mod(1,169)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(169, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("169.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 169 = 13^{2} \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 169.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: | \(9.97132279097\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{3}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - 3 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 13) |
| 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 \(\beta = \sqrt{3}\). 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 |
|
−3.46410 | −7.00000 | 4.00000 | −13.8564 | 24.2487 | 22.5167 | 13.8564 | 22.0000 | 48.0000 | ||||||||||||||||||||||||
| 1.2 | 3.46410 | −7.00000 | 4.00000 | 13.8564 | −24.2487 | −22.5167 | −13.8564 | 22.0000 | 48.0000 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(13\) | \( -1 \) |
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 13.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 169.4.a.h | 2 | |
| 3.b | odd | 2 | 1 | 1521.4.a.q | 2 | ||
| 13.b | even | 2 | 1 | inner | 169.4.a.h | 2 | |
| 13.c | even | 3 | 2 | 169.4.c.i | 4 | ||
| 13.d | odd | 4 | 2 | 169.4.b.b | 2 | ||
| 13.e | even | 6 | 2 | 169.4.c.i | 4 | ||
| 13.f | odd | 12 | 2 | 13.4.e.a | ✓ | 2 | |
| 13.f | odd | 12 | 2 | 169.4.e.b | 2 | ||
| 39.d | odd | 2 | 1 | 1521.4.a.q | 2 | ||
| 39.k | even | 12 | 2 | 117.4.q.c | 2 | ||
| 52.l | even | 12 | 2 | 208.4.w.a | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 13.4.e.a | ✓ | 2 | 13.f | odd | 12 | 2 | |
| 117.4.q.c | 2 | 39.k | even | 12 | 2 | ||
| 169.4.a.h | 2 | 1.a | even | 1 | 1 | trivial | |
| 169.4.a.h | 2 | 13.b | even | 2 | 1 | inner | |
| 169.4.b.b | 2 | 13.d | odd | 4 | 2 | ||
| 169.4.c.i | 4 | 13.c | even | 3 | 2 | ||
| 169.4.c.i | 4 | 13.e | even | 6 | 2 | ||
| 169.4.e.b | 2 | 13.f | odd | 12 | 2 | ||
| 208.4.w.a | 2 | 52.l | even | 12 | 2 | ||
| 1521.4.a.q | 2 | 3.b | odd | 2 | 1 | ||
| 1521.4.a.q | 2 | 39.d | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{2} - 12 \)
acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(169))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - 12 \)
|
| $3$ |
\( (T + 7)^{2} \)
|
| $5$ |
\( T^{2} - 192 \)
|
| $7$ |
\( T^{2} - 507 \)
|
| $11$ |
\( T^{2} - 507 \)
|
| $13$ |
\( T^{2} \)
|
| $17$ |
\( (T + 27)^{2} \)
|
| $19$ |
\( T^{2} - 7803 \)
|
| $23$ |
\( (T + 57)^{2} \)
|
| $29$ |
\( (T + 69)^{2} \)
|
| $31$ |
\( T^{2} - 5292 \)
|
| $37$ |
\( T^{2} - 1587 \)
|
| $41$ |
\( T^{2} - 154587 \)
|
| $43$ |
\( (T - 85)^{2} \)
|
| $47$ |
\( T^{2} - 117612 \)
|
| $53$ |
\( (T - 426)^{2} \)
|
| $59$ |
\( T^{2} - 363 \)
|
| $61$ |
\( (T + 17)^{2} \)
|
| $67$ |
\( T^{2} - 27075 \)
|
| $71$ |
\( T^{2} - 340707 \)
|
| $73$ |
\( T^{2} - 1009200 \)
|
| $79$ |
\( (T + 1244)^{2} \)
|
| $83$ |
\( T^{2} - 181548 \)
|
| $89$ |
\( T^{2} - 93987 \)
|
| $97$ |
\( T^{2} - 1525107 \)
|
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