Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [546,2,Mod(211,546)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(546, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 0, 2]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("546.211");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 546 = 2 \cdot 3 \cdot 7 \cdot 13 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 546.l (of order \(3\), degree \(2\), 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: | \(4.35983195036\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Relative dimension: | \(2\) over \(\Q(\zeta_{3})\) |
| Coefficient field: | \(\Q(\sqrt{-3}, \sqrt{-19})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} - 4x^{2} - 5x + 25 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 3 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{3}]$ |
$q$-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
\( x^{4} - x^{3} - 4x^{2} - 5x + 25 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( \nu^{3} + 4\nu^{2} - 4\nu - 25 ) / 20 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -\nu^{3} + \nu^{2} + 9\nu + 5 ) / 5 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 3\nu^{3} + 2\nu^{2} + 8\nu - 25 ) / 10 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{3} + \beta_{2} - 2\beta _1 - 1 ) / 3 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( -\beta_{3} + 2\beta_{2} + 14\beta _1 + 13 ) / 3 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 8\beta_{3} - 4\beta_{2} - 4\beta _1 + 19 ) / 3 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/546\mathbb{Z}\right)^\times\).
| \(n\) | \(157\) | \(365\) | \(379\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(-1 - \beta_{1}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 211.1 |
|
−0.500000 | − | 0.866025i | −0.500000 | − | 0.866025i | −0.500000 | + | 0.866025i | −3.27492 | −0.500000 | + | 0.866025i | −0.500000 | + | 0.866025i | 1.00000 | −0.500000 | + | 0.866025i | 1.63746 | + | 2.83616i | ||||||||||||||||
| 211.2 | −0.500000 | − | 0.866025i | −0.500000 | − | 0.866025i | −0.500000 | + | 0.866025i | 4.27492 | −0.500000 | + | 0.866025i | −0.500000 | + | 0.866025i | 1.00000 | −0.500000 | + | 0.866025i | −2.13746 | − | 3.70219i | |||||||||||||||||
| 295.1 | −0.500000 | + | 0.866025i | −0.500000 | + | 0.866025i | −0.500000 | − | 0.866025i | −3.27492 | −0.500000 | − | 0.866025i | −0.500000 | − | 0.866025i | 1.00000 | −0.500000 | − | 0.866025i | 1.63746 | − | 2.83616i | |||||||||||||||||
| 295.2 | −0.500000 | + | 0.866025i | −0.500000 | + | 0.866025i | −0.500000 | − | 0.866025i | 4.27492 | −0.500000 | − | 0.866025i | −0.500000 | − | 0.866025i | 1.00000 | −0.500000 | − | 0.866025i | −2.13746 | + | 3.70219i | |||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 13.c | even | 3 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 546.2.l.j | ✓ | 4 |
| 3.b | odd | 2 | 1 | 1638.2.r.x | 4 | ||
| 13.c | even | 3 | 1 | inner | 546.2.l.j | ✓ | 4 |
| 13.c | even | 3 | 1 | 7098.2.a.ca | 2 | ||
| 13.e | even | 6 | 1 | 7098.2.a.bm | 2 | ||
| 39.i | odd | 6 | 1 | 1638.2.r.x | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 546.2.l.j | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 546.2.l.j | ✓ | 4 | 13.c | even | 3 | 1 | inner |
| 1638.2.r.x | 4 | 3.b | odd | 2 | 1 | ||
| 1638.2.r.x | 4 | 39.i | odd | 6 | 1 | ||
| 7098.2.a.bm | 2 | 13.e | even | 6 | 1 | ||
| 7098.2.a.ca | 2 | 13.c | even | 3 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(546, [\chi])\):
|
\( T_{5}^{2} - T_{5} - 14 \)
|
|
\( T_{11}^{2} - 4T_{11} + 16 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} + T + 1)^{2} \)
|
| $3$ |
\( (T^{2} + T + 1)^{2} \)
|
| $5$ |
\( (T^{2} - T - 14)^{2} \)
|
| $7$ |
\( (T^{2} + T + 1)^{2} \)
|
| $11$ |
\( (T^{2} - 4 T + 16)^{2} \)
|
| $13$ |
\( (T^{2} - 7 T + 13)^{2} \)
|
| $17$ |
\( (T^{2} + 3 T + 9)^{2} \)
|
| $19$ |
\( T^{4} - 2 T^{3} + \cdots + 3136 \)
|
| $23$ |
\( T^{4} - 3 T^{3} + \cdots + 144 \)
|
| $29$ |
\( T^{4} + 9 T^{3} + \cdots + 36 \)
|
| $31$ |
\( (T^{2} - 5 T - 8)^{2} \)
|
| $37$ |
\( T^{4} - 7 T^{3} + \cdots + 4 \)
|
| $41$ |
\( T^{4} + 9 T^{3} + \cdots + 36 \)
|
| $43$ |
\( T^{4} - T^{3} + \cdots + 16384 \)
|
| $47$ |
\( (T^{2} - 2 T - 56)^{2} \)
|
| $53$ |
\( (T^{2} - 8 T - 41)^{2} \)
|
| $59$ |
\( T^{4} - T^{3} + \cdots + 16384 \)
|
| $61$ |
\( (T^{2} - 9 T + 81)^{2} \)
|
| $67$ |
\( T^{4} - 13 T^{3} + \cdots + 784 \)
|
| $71$ |
\( T^{4} + 3 T^{3} + \cdots + 144 \)
|
| $73$ |
\( (T^{2} - 19 T + 76)^{2} \)
|
| $79$ |
\( (T + 8)^{4} \)
|
| $83$ |
\( (T^{2} + T - 128)^{2} \)
|
| $89$ |
\( T^{4} + 9 T^{3} + \cdots + 36 \)
|
| $97$ |
\( T^{4} + 14 T^{3} + \cdots + 64 \)
|
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