Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [525,4,Mod(274,525)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(525, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 1, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("525.274");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 525 = 3 \cdot 5^{2} \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 525.d (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: | \(30.9760027530\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{5})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 3x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 105) |
| 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
\( x^{4} + 3x^{2} + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu^{3} + 2\nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{3} + 4\nu \)
|
| \(\beta_{3}\) | \(=\) |
\( 2\nu^{2} + 3 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{2} - \beta_1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} - 3 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( -\beta_{2} + 2\beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/525\mathbb{Z}\right)^\times\).
| \(n\) | \(127\) | \(176\) | \(451\) |
| \(\chi(n)\) | \(-1\) | \(1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 274.1 |
|
− | 4.23607i | − | 3.00000i | −9.94427 | 0 | −12.7082 | − | 7.00000i | 8.23607i | −9.00000 | 0 | |||||||||||||||||||||||||||
| 274.2 | − | 0.236068i | 3.00000i | 7.94427 | 0 | 0.708204 | 7.00000i | − | 3.76393i | −9.00000 | 0 | |||||||||||||||||||||||||||||
| 274.3 | 0.236068i | − | 3.00000i | 7.94427 | 0 | 0.708204 | − | 7.00000i | 3.76393i | −9.00000 | 0 | |||||||||||||||||||||||||||||
| 274.4 | 4.23607i | 3.00000i | −9.94427 | 0 | −12.7082 | 7.00000i | − | 8.23607i | −9.00000 | 0 | ||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 5.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 525.4.d.k | 4 | |
| 5.b | even | 2 | 1 | inner | 525.4.d.k | 4 | |
| 5.c | odd | 4 | 1 | 105.4.a.d | ✓ | 2 | |
| 5.c | odd | 4 | 1 | 525.4.a.o | 2 | ||
| 15.e | even | 4 | 1 | 315.4.a.l | 2 | ||
| 15.e | even | 4 | 1 | 1575.4.a.n | 2 | ||
| 20.e | even | 4 | 1 | 1680.4.a.bd | 2 | ||
| 35.f | even | 4 | 1 | 735.4.a.m | 2 | ||
| 105.k | odd | 4 | 1 | 2205.4.a.be | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 105.4.a.d | ✓ | 2 | 5.c | odd | 4 | 1 | |
| 315.4.a.l | 2 | 15.e | even | 4 | 1 | ||
| 525.4.a.o | 2 | 5.c | odd | 4 | 1 | ||
| 525.4.d.k | 4 | 1.a | even | 1 | 1 | trivial | |
| 525.4.d.k | 4 | 5.b | even | 2 | 1 | inner | |
| 735.4.a.m | 2 | 35.f | even | 4 | 1 | ||
| 1575.4.a.n | 2 | 15.e | even | 4 | 1 | ||
| 1680.4.a.bd | 2 | 20.e | even | 4 | 1 | ||
| 2205.4.a.be | 2 | 105.k | odd | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(525, [\chi])\):
|
\( T_{2}^{4} + 18T_{2}^{2} + 1 \)
|
|
\( T_{11}^{2} + 92T_{11} + 2096 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + 18T^{2} + 1 \)
|
| $3$ |
\( (T^{2} + 9)^{2} \)
|
| $5$ |
\( T^{4} \)
|
| $7$ |
\( (T^{2} + 49)^{2} \)
|
| $11$ |
\( (T^{2} + 92 T + 2096)^{2} \)
|
| $13$ |
\( T^{4} + 14472 T^{2} + 51897616 \)
|
| $17$ |
\( T^{4} + 20328 T^{2} + 84566416 \)
|
| $19$ |
\( (T^{2} - 108 T - 464)^{2} \)
|
| $23$ |
\( T^{4} + 55200 T^{2} + 556960000 \)
|
| $29$ |
\( (T^{2} - 236 T + 13204)^{2} \)
|
| $31$ |
\( (T^{2} + 60 T - 51120)^{2} \)
|
| $37$ |
\( T^{4} + 26568 T^{2} + 56610576 \)
|
| $41$ |
\( (T^{2} - 44 T - 31516)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 5974671616 \)
|
| $47$ |
\( T^{4} + \cdots + 10225254400 \)
|
| $53$ |
\( T^{4} + \cdots + 1362791056 \)
|
| $59$ |
\( (T^{2} - 464 T + 47344)^{2} \)
|
| $61$ |
\( (T^{2} + 684 T + 81684)^{2} \)
|
| $67$ |
\( T^{4} + 539808 T^{2} + 891136 \)
|
| $71$ |
\( (T^{2} + 740 T + 41680)^{2} \)
|
| $73$ |
\( T^{4} + 238728 T^{2} + 868834576 \)
|
| $79$ |
\( (T^{2} - 408 T - 1129664)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 3264522496 \)
|
| $89$ |
\( (T^{2} - 1332 T + 380836)^{2} \)
|
| $97$ |
\( T^{4} + \cdots + 2135093750416 \)
|
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