Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [720,6,Mod(1,720)]
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, 0]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("720.1");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 720 = 2^{4} \cdot 3^{2} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 720.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: | \(115.476350265\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{241}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 60 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2^{2}\cdot 3 \) |
| Twist minimal: | no (minimal twist has level 180) |
| 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 \(\beta = 6\sqrt{241}\). 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 | 0 | 0 | −25.0000 | 0 | −53.1450 | 0 | 0 | 0 | ||||||||||||||||||||||||
| 1.2 | 0 | 0 | 0 | −25.0000 | 0 | 133.145 | 0 | 0 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(1\) |
| \(5\) | \(1\) |
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 | 720.6.a.bc | 2 | |
| 3.b | odd | 2 | 1 | 720.6.a.bg | 2 | ||
| 4.b | odd | 2 | 1 | 180.6.a.f | ✓ | 2 | |
| 12.b | even | 2 | 1 | 180.6.a.g | yes | 2 | |
| 20.d | odd | 2 | 1 | 900.6.a.u | 2 | ||
| 20.e | even | 4 | 2 | 900.6.d.n | 4 | ||
| 60.h | even | 2 | 1 | 900.6.a.t | 2 | ||
| 60.l | odd | 4 | 2 | 900.6.d.k | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 180.6.a.f | ✓ | 2 | 4.b | odd | 2 | 1 | |
| 180.6.a.g | yes | 2 | 12.b | even | 2 | 1 | |
| 720.6.a.bc | 2 | 1.a | even | 1 | 1 | trivial | |
| 720.6.a.bg | 2 | 3.b | odd | 2 | 1 | ||
| 900.6.a.t | 2 | 60.h | even | 2 | 1 | ||
| 900.6.a.u | 2 | 20.d | odd | 2 | 1 | ||
| 900.6.d.k | 4 | 60.l | odd | 4 | 2 | ||
| 900.6.d.n | 4 | 20.e | even | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{6}^{\mathrm{new}}(\Gamma_0(720))\):
|
\( T_{7}^{2} - 80T_{7} - 7076 \)
|
|
\( T_{11}^{2} + 240T_{11} - 202500 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( (T + 25)^{2} \)
|
| $7$ |
\( T^{2} - 80T - 7076 \)
|
| $11$ |
\( T^{2} + 240T - 202500 \)
|
| $13$ |
\( T^{2} + 680T - 439664 \)
|
| $17$ |
\( T^{2} - 540 T - 3397500 \)
|
| $19$ |
\( T^{2} + 1096 T - 3170096 \)
|
| $23$ |
\( T^{2} + 3480 T + 2160000 \)
|
| $29$ |
\( T^{2} - 9420 T + 8302500 \)
|
| $31$ |
\( T^{2} + 2992 T - 40274384 \)
|
| $37$ |
\( T^{2} + 7520 T - 17096000 \)
|
| $41$ |
\( T^{2} - 27120 T + 152640000 \)
|
| $43$ |
\( T^{2} + 4720 T - 61617344 \)
|
| $47$ |
\( T^{2} + 38280 T + 261360000 \)
|
| $53$ |
\( T^{2} - 53580 T + 703822500 \)
|
| $59$ |
\( T^{2} + 46800 T - 108562500 \)
|
| $61$ |
\( T^{2} - 21508 T - 9285884 \)
|
| $67$ |
\( T^{2} - 10880 T + 4294384 \)
|
| $71$ |
\( T^{2} + 45840 T - 419490000 \)
|
| $73$ |
\( T^{2} - 9580 T - 476793500 \)
|
| $79$ |
\( T^{2} + \cdots + 1878317296 \)
|
| $83$ |
\( T^{2} - 14160 T - 200610000 \)
|
| $89$ |
\( T^{2} + \cdots - 1221390000 \)
|
| $97$ |
\( T^{2} + \cdots - 7982377916 \)
|
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