Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [720,6,Mod(289,720)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(720, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0, 1]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("720.289");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 720 = 2^{4} \cdot 3^{2} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 720.f (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: | \(115.476350265\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{19})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - 9x^{2} + 25 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2^{6} \) |
| Twist minimal: | no (minimal twist has level 90) |
| 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 a basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{4} - 9x^{2} + 25 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( -\nu^{3} + 24\nu ) / 5 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -2\nu^{3} + 8\nu ) / 5 \)
|
| \(\beta_{3}\) | \(=\) |
\( 8\nu^{2} - 36 \)
|
| \(\nu\) | \(=\) |
\( ( -\beta_{2} + 2\beta_1 ) / 8 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} + 36 ) / 8 \)
|
| \(\nu^{3}\) | \(=\) |
\( -3\beta_{2} + \beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/720\mathbb{Z}\right)^\times\).
| \(n\) | \(181\) | \(271\) | \(577\) | \(641\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 289.1 |
|
0 | 0 | 0 | −43.5890 | − | 35.0000i | 0 | 17.4356i | 0 | 0 | 0 | ||||||||||||||||||||||||||||
| 289.2 | 0 | 0 | 0 | −43.5890 | + | 35.0000i | 0 | − | 17.4356i | 0 | 0 | 0 | ||||||||||||||||||||||||||||
| 289.3 | 0 | 0 | 0 | 43.5890 | − | 35.0000i | 0 | − | 17.4356i | 0 | 0 | 0 | ||||||||||||||||||||||||||||
| 289.4 | 0 | 0 | 0 | 43.5890 | + | 35.0000i | 0 | 17.4356i | 0 | 0 | 0 | |||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 3.b | odd | 2 | 1 | inner |
| 5.b | even | 2 | 1 | inner |
| 15.d | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 720.6.f.j | 4 | |
| 3.b | odd | 2 | 1 | inner | 720.6.f.j | 4 | |
| 4.b | odd | 2 | 1 | 90.6.c.d | ✓ | 4 | |
| 5.b | even | 2 | 1 | inner | 720.6.f.j | 4 | |
| 12.b | even | 2 | 1 | 90.6.c.d | ✓ | 4 | |
| 15.d | odd | 2 | 1 | inner | 720.6.f.j | 4 | |
| 20.d | odd | 2 | 1 | 90.6.c.d | ✓ | 4 | |
| 20.e | even | 4 | 1 | 450.6.a.z | 2 | ||
| 20.e | even | 4 | 1 | 450.6.a.be | 2 | ||
| 60.h | even | 2 | 1 | 90.6.c.d | ✓ | 4 | |
| 60.l | odd | 4 | 1 | 450.6.a.z | 2 | ||
| 60.l | odd | 4 | 1 | 450.6.a.be | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 90.6.c.d | ✓ | 4 | 4.b | odd | 2 | 1 | |
| 90.6.c.d | ✓ | 4 | 12.b | even | 2 | 1 | |
| 90.6.c.d | ✓ | 4 | 20.d | odd | 2 | 1 | |
| 90.6.c.d | ✓ | 4 | 60.h | even | 2 | 1 | |
| 450.6.a.z | 2 | 20.e | even | 4 | 1 | ||
| 450.6.a.z | 2 | 60.l | odd | 4 | 1 | ||
| 450.6.a.be | 2 | 20.e | even | 4 | 1 | ||
| 450.6.a.be | 2 | 60.l | odd | 4 | 1 | ||
| 720.6.f.j | 4 | 1.a | even | 1 | 1 | trivial | |
| 720.6.f.j | 4 | 3.b | odd | 2 | 1 | inner | |
| 720.6.f.j | 4 | 5.b | even | 2 | 1 | inner | |
| 720.6.f.j | 4 | 15.d | odd | 2 | 1 | inner | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{6}^{\mathrm{new}}(720, [\chi])\):
|
\( T_{7}^{2} + 304 \)
|
|
\( T_{11}^{2} - 416176 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} - 1350 T^{2} + 9765625 \)
|
| $7$ |
\( (T^{2} + 304)^{2} \)
|
| $11$ |
\( (T^{2} - 416176)^{2} \)
|
| $13$ |
\( (T^{2} + 1206576)^{2} \)
|
| $17$ |
\( (T^{2} + 1359556)^{2} \)
|
| $19$ |
\( (T + 2244)^{4} \)
|
| $23$ |
\( (T^{2} + 250000)^{2} \)
|
| $29$ |
\( (T^{2} - 221616)^{2} \)
|
| $31$ |
\( (T + 3856)^{4} \)
|
| $37$ |
\( (T^{2} + 48883504)^{2} \)
|
| $41$ |
\( (T^{2} - 91960000)^{2} \)
|
| $43$ |
\( (T^{2} + 28094464)^{2} \)
|
| $47$ |
\( (T^{2} + 396010000)^{2} \)
|
| $53$ |
\( (T^{2} + 1313316)^{2} \)
|
| $59$ |
\( (T^{2} - 1396104496)^{2} \)
|
| $61$ |
\( (T + 38158)^{4} \)
|
| $67$ |
\( (T^{2} + 1312697536)^{2} \)
|
| $71$ |
\( (T^{2} - 276675264)^{2} \)
|
| $73$ |
\( (T^{2} + 4815481600)^{2} \)
|
| $79$ |
\( (T + 20664)^{4} \)
|
| $83$ |
\( (T^{2} + 9402793024)^{2} \)
|
| $89$ |
\( (T^{2} - 3564027904)^{2} \)
|
| $97$ |
\( (T^{2} + 33913024)^{2} \)
|
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