Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1200,4,Mod(1,1200)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1200, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 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("1200.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1200 = 2^{4} \cdot 3 \cdot 5^{2} \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1200.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: | \(70.8022920069\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{129}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 32 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 120) |
| 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 \(\beta = \sqrt{129}\). 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 | −3.00000 | 0 | 0 | 0 | −33.0735 | 0 | 9.00000 | 0 | ||||||||||||||||||||||||
| 1.2 | 0 | −3.00000 | 0 | 0 | 0 | 35.0735 | 0 | 9.00000 | 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 | 1200.4.a.bo | 2 | |
| 4.b | odd | 2 | 1 | 600.4.a.v | 2 | ||
| 5.b | even | 2 | 1 | 1200.4.a.bq | 2 | ||
| 5.c | odd | 4 | 2 | 240.4.f.g | 4 | ||
| 12.b | even | 2 | 1 | 1800.4.a.bl | 2 | ||
| 15.e | even | 4 | 2 | 720.4.f.i | 4 | ||
| 20.d | odd | 2 | 1 | 600.4.a.t | 2 | ||
| 20.e | even | 4 | 2 | 120.4.f.d | ✓ | 4 | |
| 40.i | odd | 4 | 2 | 960.4.f.o | 4 | ||
| 40.k | even | 4 | 2 | 960.4.f.n | 4 | ||
| 60.h | even | 2 | 1 | 1800.4.a.bn | 2 | ||
| 60.l | odd | 4 | 2 | 360.4.f.d | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 120.4.f.d | ✓ | 4 | 20.e | even | 4 | 2 | |
| 240.4.f.g | 4 | 5.c | odd | 4 | 2 | ||
| 360.4.f.d | 4 | 60.l | odd | 4 | 2 | ||
| 600.4.a.t | 2 | 20.d | odd | 2 | 1 | ||
| 600.4.a.v | 2 | 4.b | odd | 2 | 1 | ||
| 720.4.f.i | 4 | 15.e | even | 4 | 2 | ||
| 960.4.f.n | 4 | 40.k | even | 4 | 2 | ||
| 960.4.f.o | 4 | 40.i | odd | 4 | 2 | ||
| 1200.4.a.bo | 2 | 1.a | even | 1 | 1 | trivial | |
| 1200.4.a.bq | 2 | 5.b | even | 2 | 1 | ||
| 1800.4.a.bl | 2 | 12.b | even | 2 | 1 | ||
| 1800.4.a.bn | 2 | 60.h | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(1200))\):
|
\( T_{7}^{2} - 2T_{7} - 1160 \)
|
|
\( T_{11}^{2} + 74T_{11} + 1240 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} \)
|
| $3$ |
\( (T + 3)^{2} \)
|
| $5$ |
\( T^{2} \)
|
| $7$ |
\( T^{2} - 2T - 1160 \)
|
| $11$ |
\( T^{2} + 74T + 1240 \)
|
| $13$ |
\( T^{2} - 98T + 2272 \)
|
| $17$ |
\( T^{2} + 78T - 1704 \)
|
| $19$ |
\( T^{2} - 80T - 6656 \)
|
| $23$ |
\( T^{2} + 40T - 7856 \)
|
| $29$ |
\( T^{2} - 50T - 5696 \)
|
| $31$ |
\( T^{2} - 12T - 41760 \)
|
| $37$ |
\( T^{2} + 34T - 80336 \)
|
| $41$ |
\( T^{2} - 344T + 24940 \)
|
| $43$ |
\( (T + 108)^{2} \)
|
| $47$ |
\( T^{2} + 876T + 166560 \)
|
| $53$ |
\( T^{2} + 634T + 100360 \)
|
| $59$ |
\( T^{2} + 666T - 198840 \)
|
| $61$ |
\( T^{2} - 244T - 117212 \)
|
| $67$ |
\( T^{2} - 980T + 90976 \)
|
| $71$ |
\( T^{2} + 308T - 162560 \)
|
| $73$ |
\( T^{2} + 1412 T + 312160 \)
|
| $79$ |
\( T^{2} + 1052 T + 251392 \)
|
| $83$ |
\( T^{2} + 248T - 17648 \)
|
| $89$ |
\( T^{2} - 684T - 180252 \)
|
| $97$ |
\( T^{2} + 1840 T + 714304 \)
|
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