Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2025,4,Mod(1,2025)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2025, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("2025.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2025 = 3^{4} \cdot 5^{2} \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2025.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: | \(119.478867762\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{33}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 8 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 9) |
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{33})\). 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 |
|
−1.37228 | 0 | −6.11684 | 0 | 0 | 5.11684 | 19.3723 | 0 | 0 | ||||||||||||||||||||||||
| 1.2 | 4.37228 | 0 | 11.1168 | 0 | 0 | −12.1168 | 13.6277 | 0 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
| \(5\) | \(1\) |
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 | 2025.4.a.n | 2 | |
| 3.b | odd | 2 | 1 | 2025.4.a.g | 2 | ||
| 5.b | even | 2 | 1 | 81.4.a.a | 2 | ||
| 9.d | odd | 6 | 2 | 225.4.e.b | 4 | ||
| 15.d | odd | 2 | 1 | 81.4.a.d | 2 | ||
| 20.d | odd | 2 | 1 | 1296.4.a.i | 2 | ||
| 45.h | odd | 6 | 2 | 9.4.c.a | ✓ | 4 | |
| 45.j | even | 6 | 2 | 27.4.c.a | 4 | ||
| 45.l | even | 12 | 4 | 225.4.k.b | 8 | ||
| 60.h | even | 2 | 1 | 1296.4.a.u | 2 | ||
| 180.n | even | 6 | 2 | 144.4.i.c | 4 | ||
| 180.p | odd | 6 | 2 | 432.4.i.c | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 9.4.c.a | ✓ | 4 | 45.h | odd | 6 | 2 | |
| 27.4.c.a | 4 | 45.j | even | 6 | 2 | ||
| 81.4.a.a | 2 | 5.b | even | 2 | 1 | ||
| 81.4.a.d | 2 | 15.d | odd | 2 | 1 | ||
| 144.4.i.c | 4 | 180.n | even | 6 | 2 | ||
| 225.4.e.b | 4 | 9.d | odd | 6 | 2 | ||
| 225.4.k.b | 8 | 45.l | even | 12 | 4 | ||
| 432.4.i.c | 4 | 180.p | odd | 6 | 2 | ||
| 1296.4.a.i | 2 | 20.d | odd | 2 | 1 | ||
| 1296.4.a.u | 2 | 60.h | even | 2 | 1 | ||
| 2025.4.a.g | 2 | 3.b | odd | 2 | 1 | ||
| 2025.4.a.n | 2 | 1.a | even | 1 | 1 | trivial | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(2025))\):
|
\( T_{2}^{2} - 3T_{2} - 6 \)
|
|
\( T_{7}^{2} + 7T_{7} - 62 \)
|
|
\( T_{11}^{2} + 66T_{11} + 561 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - 3T - 6 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} \)
|
| $7$ |
\( T^{2} + 7T - 62 \)
|
| $11$ |
\( T^{2} + 66T + 561 \)
|
| $13$ |
\( T^{2} - 11T - 1826 \)
|
| $17$ |
\( T^{2} - 99T + 1782 \)
|
| $19$ |
\( T^{2} + 77T - 4532 \)
|
| $23$ |
\( T^{2} - 33T - 2706 \)
|
| $29$ |
\( T^{2} - 51T + 642 \)
|
| $31$ |
\( T^{2} - 43T + 388 \)
|
| $37$ |
\( T^{2} - 50T - 23432 \)
|
| $41$ |
\( T^{2} + 132T - 74877 \)
|
| $43$ |
\( T^{2} + 88T + 1639 \)
|
| $47$ |
\( T^{2} - 399T - 28518 \)
|
| $53$ |
\( T^{2} - 54T - 215784 \)
|
| $59$ |
\( T^{2} + 798T + 6609 \)
|
| $61$ |
\( T^{2} - 439T - 42776 \)
|
| $67$ |
\( T^{2} + 988T + 208099 \)
|
| $71$ |
\( T^{2} + 1368 T + 296784 \)
|
| $73$ |
\( T^{2} - 455T - 435398 \)
|
| $79$ |
\( T^{2} + 803T - 626516 \)
|
| $83$ |
\( T^{2} - 813T + 70788 \)
|
| $89$ |
\( T^{2} - 396T - 3564 \)
|
| $97$ |
\( T^{2} + 736T + 49591 \)
|
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