Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1260,4,Mod(1009,1260)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1260, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 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("1260.1009");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1260 = 2^{2} \cdot 3^{2} \cdot 5 \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1260.k (of order \(2\), degree \(1\), 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: | \(74.3424066072\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{6})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 9 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 7^{2} \) |
| Twist minimal: | no (minimal twist has level 140) |
| 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
\( x^{4} + 9 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( 7\nu^{2} ) / 3 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{3} + 3\nu ) / 3 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -4\nu^{3} + 9\nu ) / 3 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{3} + 4\beta_{2} ) / 7 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( 3\beta_1 ) / 7 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( -3\beta_{3} + 9\beta_{2} ) / 7 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1260\mathbb{Z}\right)^\times\).
| \(n\) | \(281\) | \(631\) | \(757\) | \(1081\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(-1\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1009.1 |
|
0 | 0 | 0 | −9.57321 | − | 5.77526i | 0 | − | 7.00000i | 0 | 0 | 0 | |||||||||||||||||||||||||||
| 1009.2 | 0 | 0 | 0 | −9.57321 | + | 5.77526i | 0 | 7.00000i | 0 | 0 | 0 | |||||||||||||||||||||||||||||
| 1009.3 | 0 | 0 | 0 | 7.57321 | − | 8.22474i | 0 | − | 7.00000i | 0 | 0 | 0 | ||||||||||||||||||||||||||||
| 1009.4 | 0 | 0 | 0 | 7.57321 | + | 8.22474i | 0 | 7.00000i | 0 | 0 | 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 | 1260.4.k.d | 4 | |
| 3.b | odd | 2 | 1 | 140.4.e.c | ✓ | 4 | |
| 5.b | even | 2 | 1 | inner | 1260.4.k.d | 4 | |
| 12.b | even | 2 | 1 | 560.4.g.d | 4 | ||
| 15.d | odd | 2 | 1 | 140.4.e.c | ✓ | 4 | |
| 15.e | even | 4 | 1 | 700.4.a.p | 2 | ||
| 15.e | even | 4 | 1 | 700.4.a.q | 2 | ||
| 21.c | even | 2 | 1 | 980.4.e.d | 4 | ||
| 60.h | even | 2 | 1 | 560.4.g.d | 4 | ||
| 105.g | even | 2 | 1 | 980.4.e.d | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 140.4.e.c | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 140.4.e.c | ✓ | 4 | 15.d | odd | 2 | 1 | |
| 560.4.g.d | 4 | 12.b | even | 2 | 1 | ||
| 560.4.g.d | 4 | 60.h | even | 2 | 1 | ||
| 700.4.a.p | 2 | 15.e | even | 4 | 1 | ||
| 700.4.a.q | 2 | 15.e | even | 4 | 1 | ||
| 980.4.e.d | 4 | 21.c | even | 2 | 1 | ||
| 980.4.e.d | 4 | 105.g | even | 2 | 1 | ||
| 1260.4.k.d | 4 | 1.a | even | 1 | 1 | trivial | |
| 1260.4.k.d | 4 | 5.b | even | 2 | 1 | inner | |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{11}^{2} + 48T_{11} - 600 \)
acting on \(S_{4}^{\mathrm{new}}(1260, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} + 4 T^{3} + \cdots + 15625 \)
|
| $7$ |
\( (T^{2} + 49)^{2} \)
|
| $11$ |
\( (T^{2} + 48 T - 600)^{2} \)
|
| $13$ |
\( T^{4} + 6740 T^{2} + 8868484 \)
|
| $17$ |
\( T^{4} + 7304 T^{2} + 10627600 \)
|
| $19$ |
\( (T^{2} - 88 T + 1642)^{2} \)
|
| $23$ |
\( T^{4} + 440 T^{2} + 29584 \)
|
| $29$ |
\( (T^{2} + 140 T + 3724)^{2} \)
|
| $31$ |
\( (T^{2} - 104 T + 1528)^{2} \)
|
| $37$ |
\( T^{4} + 93896 T^{2} + 372490000 \)
|
| $41$ |
\( (T^{2} + 180 T - 134196)^{2} \)
|
| $43$ |
\( T^{4} + 182864 T^{2} + 213160000 \)
|
| $47$ |
\( T^{4} + 60368 T^{2} + 818875456 \)
|
| $53$ |
\( T^{4} + \cdots + 39380021136 \)
|
| $59$ |
\( (T^{2} - 568 T - 74870)^{2} \)
|
| $61$ |
\( (T^{2} + 468 T - 100770)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 235341414400 \)
|
| $71$ |
\( (T^{2} - 972 T + 235020)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 140880115600 \)
|
| $79$ |
\( (T^{2} + 964 T - 502676)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 145403417124 \)
|
| $89$ |
\( (T^{2} + 1652 T + 512932)^{2} \)
|
| $97$ |
\( T^{4} + \cdots + 257450700816 \)
|
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