Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1575,4,Mod(1,1575)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1575, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("1575.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1575 = 3^{2} \cdot 5^{2} \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1575.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: | \(92.9280082590\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{17}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 4 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 525) |
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{17})\). 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 |
|
−0.561553 | 0 | −7.68466 | 0 | 0 | 7.00000 | 8.80776 | 0 | 0 | ||||||||||||||||||||||||
| 1.2 | 3.56155 | 0 | 4.68466 | 0 | 0 | 7.00000 | −11.8078 | 0 | 0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
| \(5\) | \(-1\) |
| \(7\) | \(-1\) |
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 | 1575.4.a.x | 2 | |
| 3.b | odd | 2 | 1 | 525.4.a.j | ✓ | 2 | |
| 5.b | even | 2 | 1 | 1575.4.a.o | 2 | ||
| 15.d | odd | 2 | 1 | 525.4.a.m | yes | 2 | |
| 15.e | even | 4 | 2 | 525.4.d.m | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 525.4.a.j | ✓ | 2 | 3.b | odd | 2 | 1 | |
| 525.4.a.m | yes | 2 | 15.d | odd | 2 | 1 | |
| 525.4.d.m | 4 | 15.e | even | 4 | 2 | ||
| 1575.4.a.o | 2 | 5.b | even | 2 | 1 | ||
| 1575.4.a.x | 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 \(S_{4}^{\mathrm{new}}(\Gamma_0(1575))\):
|
\( T_{2}^{2} - 3T_{2} - 2 \)
|
|
\( T_{11}^{2} - 31T_{11} + 134 \)
|
|
\( T_{13}^{2} + 39T_{13} - 848 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - 3T - 2 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} \)
|
| $7$ |
\( (T - 7)^{2} \)
|
| $11$ |
\( T^{2} - 31T + 134 \)
|
| $13$ |
\( T^{2} + 39T - 848 \)
|
| $17$ |
\( T^{2} + 79T - 1538 \)
|
| $19$ |
\( T^{2} + 56T - 12544 \)
|
| $23$ |
\( T^{2} - 254T + 13681 \)
|
| $29$ |
\( T^{2} - 62T - 29027 \)
|
| $31$ |
\( T^{2} + 135T + 3838 \)
|
| $37$ |
\( T^{2} + 113T + 1658 \)
|
| $41$ |
\( T^{2} + 235T + 5200 \)
|
| $43$ |
\( T^{2} + 804T + 147307 \)
|
| $47$ |
\( T^{2} - 152T - 27136 \)
|
| $53$ |
\( T^{2} - 149T - 28114 \)
|
| $59$ |
\( T^{2} - 441T - 137024 \)
|
| $61$ |
\( T^{2} + 223T - 304316 \)
|
| $67$ |
\( T^{2} + 1157 T + 270364 \)
|
| $71$ |
\( T^{2} + 619T - 138916 \)
|
| $73$ |
\( T^{2} + 268T - 14956 \)
|
| $79$ |
\( T^{2} + 427T + 494 \)
|
| $83$ |
\( T^{2} - 1211 T - 422854 \)
|
| $89$ |
\( T^{2} + 466 T - 1103768 \)
|
| $97$ |
\( T^{2} + 172 T - 2098972 \)
|
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