Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [289,2,Mod(288,289)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(289, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("289.288");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 289 = 17^{2} \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 289.b (of order \(2\), degree \(1\), not minimal) |
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: | no |
| Analytic conductor: | \(2.30767661842\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{-1}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 17) |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{2}]$ |
$q$-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 \(\beta = 2i\). We also show the integral \(q\)-expansion of the trace form.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/289\mathbb{Z}\right)^\times\).
| \(n\) | \(3\) |
| \(\chi(n)\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 288.1 |
|
1.00000 | 0 | −1.00000 | − | 2.00000i | 0 | − | 4.00000i | −3.00000 | 3.00000 | − | 2.00000i | |||||||||||||||||||||
| 288.2 | 1.00000 | 0 | −1.00000 | 2.00000i | 0 | 4.00000i | −3.00000 | 3.00000 | 2.00000i | |||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 17.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 289.2.b.a | 2 | |
| 17.b | even | 2 | 1 | inner | 289.2.b.a | 2 | |
| 17.c | even | 4 | 1 | 17.2.a.a | ✓ | 1 | |
| 17.c | even | 4 | 1 | 289.2.a.a | 1 | ||
| 17.d | even | 8 | 4 | 289.2.c.a | 4 | ||
| 17.e | odd | 16 | 8 | 289.2.d.d | 8 | ||
| 51.f | odd | 4 | 1 | 153.2.a.c | 1 | ||
| 51.f | odd | 4 | 1 | 2601.2.a.g | 1 | ||
| 68.f | odd | 4 | 1 | 272.2.a.b | 1 | ||
| 68.f | odd | 4 | 1 | 4624.2.a.d | 1 | ||
| 85.f | odd | 4 | 1 | 425.2.b.b | 2 | ||
| 85.i | odd | 4 | 1 | 425.2.b.b | 2 | ||
| 85.j | even | 4 | 1 | 425.2.a.d | 1 | ||
| 85.j | even | 4 | 1 | 7225.2.a.g | 1 | ||
| 119.f | odd | 4 | 1 | 833.2.a.a | 1 | ||
| 119.m | odd | 12 | 2 | 833.2.e.a | 2 | ||
| 119.n | even | 12 | 2 | 833.2.e.b | 2 | ||
| 136.i | even | 4 | 1 | 1088.2.a.i | 1 | ||
| 136.j | odd | 4 | 1 | 1088.2.a.h | 1 | ||
| 187.f | odd | 4 | 1 | 2057.2.a.e | 1 | ||
| 204.l | even | 4 | 1 | 2448.2.a.o | 1 | ||
| 221.k | even | 4 | 1 | 2873.2.a.c | 1 | ||
| 255.i | odd | 4 | 1 | 3825.2.a.d | 1 | ||
| 323.g | odd | 4 | 1 | 6137.2.a.b | 1 | ||
| 340.n | odd | 4 | 1 | 6800.2.a.n | 1 | ||
| 357.l | even | 4 | 1 | 7497.2.a.l | 1 | ||
| 391.f | odd | 4 | 1 | 8993.2.a.a | 1 | ||
| 408.q | even | 4 | 1 | 9792.2.a.i | 1 | ||
| 408.t | odd | 4 | 1 | 9792.2.a.n | 1 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 17.2.a.a | ✓ | 1 | 17.c | even | 4 | 1 | |
| 153.2.a.c | 1 | 51.f | odd | 4 | 1 | ||
| 272.2.a.b | 1 | 68.f | odd | 4 | 1 | ||
| 289.2.a.a | 1 | 17.c | even | 4 | 1 | ||
| 289.2.b.a | 2 | 1.a | even | 1 | 1 | trivial | |
| 289.2.b.a | 2 | 17.b | even | 2 | 1 | inner | |
| 289.2.c.a | 4 | 17.d | even | 8 | 4 | ||
| 289.2.d.d | 8 | 17.e | odd | 16 | 8 | ||
| 425.2.a.d | 1 | 85.j | even | 4 | 1 | ||
| 425.2.b.b | 2 | 85.f | odd | 4 | 1 | ||
| 425.2.b.b | 2 | 85.i | odd | 4 | 1 | ||
| 833.2.a.a | 1 | 119.f | odd | 4 | 1 | ||
| 833.2.e.a | 2 | 119.m | odd | 12 | 2 | ||
| 833.2.e.b | 2 | 119.n | even | 12 | 2 | ||
| 1088.2.a.h | 1 | 136.j | odd | 4 | 1 | ||
| 1088.2.a.i | 1 | 136.i | even | 4 | 1 | ||
| 2057.2.a.e | 1 | 187.f | odd | 4 | 1 | ||
| 2448.2.a.o | 1 | 204.l | even | 4 | 1 | ||
| 2601.2.a.g | 1 | 51.f | odd | 4 | 1 | ||
| 2873.2.a.c | 1 | 221.k | even | 4 | 1 | ||
| 3825.2.a.d | 1 | 255.i | odd | 4 | 1 | ||
| 4624.2.a.d | 1 | 68.f | odd | 4 | 1 | ||
| 6137.2.a.b | 1 | 323.g | odd | 4 | 1 | ||
| 6800.2.a.n | 1 | 340.n | odd | 4 | 1 | ||
| 7225.2.a.g | 1 | 85.j | even | 4 | 1 | ||
| 7497.2.a.l | 1 | 357.l | even | 4 | 1 | ||
| 8993.2.a.a | 1 | 391.f | odd | 4 | 1 | ||
| 9792.2.a.i | 1 | 408.q | even | 4 | 1 | ||
| 9792.2.a.n | 1 | 408.t | odd | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2} - 1 \)
acting on \(S_{2}^{\mathrm{new}}(289, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T - 1)^{2} \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} + 4 \)
|
| $7$ |
\( T^{2} + 16 \)
|
| $11$ |
\( T^{2} \)
|
| $13$ |
\( (T + 2)^{2} \)
|
| $17$ |
\( T^{2} \)
|
| $19$ |
\( (T - 4)^{2} \)
|
| $23$ |
\( T^{2} + 16 \)
|
| $29$ |
\( T^{2} + 36 \)
|
| $31$ |
\( T^{2} + 16 \)
|
| $37$ |
\( T^{2} + 4 \)
|
| $41$ |
\( T^{2} + 36 \)
|
| $43$ |
\( (T + 4)^{2} \)
|
| $47$ |
\( T^{2} \)
|
| $53$ |
\( (T + 6)^{2} \)
|
| $59$ |
\( (T - 12)^{2} \)
|
| $61$ |
\( T^{2} + 100 \)
|
| $67$ |
\( (T - 4)^{2} \)
|
| $71$ |
\( T^{2} + 16 \)
|
| $73$ |
\( T^{2} + 36 \)
|
| $79$ |
\( T^{2} + 144 \)
|
| $83$ |
\( (T - 4)^{2} \)
|
| $89$ |
\( (T - 10)^{2} \)
|
| $97$ |
\( T^{2} + 4 \)
|
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