Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [770,2,Mod(221,770)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(770, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 4, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("770.221");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 770 = 2 \cdot 5 \cdot 7 \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 770.i (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: | \(6.14848095564\) |
| Analytic rank: | \(0\) |
| Dimension: | \(6\) |
| Relative dimension: | \(3\) over \(\Q(\zeta_{3})\) |
| Coefficient field: | 6.0.64827.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{6} - x^{5} + 3x^{4} + 5x^{2} - 2x + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| 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 \(1,\beta_1,\ldots,\beta_{5}\) 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
\( x^{6} - x^{5} + 3x^{4} + 5x^{2} - 2x + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -\nu^{5} + 3\nu^{4} - 9\nu^{3} + 5\nu^{2} - 2\nu + 6 ) / 13 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -3\nu^{5} + 9\nu^{4} - 14\nu^{3} + 15\nu^{2} - 6\nu + 18 ) / 13 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( -4\nu^{5} - \nu^{4} - 10\nu^{3} - 6\nu^{2} - 34\nu - 2 ) / 13 \)
|
| \(\beta_{5}\) | \(=\) |
\( ( -6\nu^{5} + 5\nu^{4} - 15\nu^{3} - 9\nu^{2} - 25\nu + 10 ) / 13 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( -\beta_{5} + \beta_{4} + \beta_{3} - \beta_{2} + \beta_1 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} - 3\beta_{2} \)
|
| \(\nu^{4}\) | \(=\) |
\( 2\beta_{5} - 3\beta_{4} - 4\beta _1 - 2 \)
|
| \(\nu^{5}\) | \(=\) |
\( \beta_{5} - 4\beta_{4} - 4\beta_{3} + 9\beta_{2} - 9\beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/770\mathbb{Z}\right)^\times\).
| \(n\) | \(211\) | \(617\) | \(661\) |
| \(\chi(n)\) | \(1\) | \(1\) | \(-1 + \beta_{5}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 221.1 |
|
0.500000 | + | 0.866025i | −1.52446 | + | 2.64044i | −0.500000 | + | 0.866025i | 0.500000 | + | 0.866025i | −3.04892 | 2.37047 | + | 1.17511i | −1.00000 | −3.14795 | − | 5.45241i | −0.500000 | + | 0.866025i | ||||||||||||||||||||||
| 221.2 | 0.500000 | + | 0.866025i | 0.678448 | − | 1.17511i | −0.500000 | + | 0.866025i | 0.500000 | + | 0.866025i | 1.35690 | −2.20291 | + | 1.46533i | −1.00000 | 0.579417 | + | 1.00358i | −0.500000 | + | 0.866025i | |||||||||||||||||||||||
| 221.3 | 0.500000 | + | 0.866025i | 0.846011 | − | 1.46533i | −0.500000 | + | 0.866025i | 0.500000 | + | 0.866025i | 1.69202 | −0.167563 | − | 2.64044i | −1.00000 | 0.0685317 | + | 0.118700i | −0.500000 | + | 0.866025i | |||||||||||||||||||||||
| 331.1 | 0.500000 | − | 0.866025i | −1.52446 | − | 2.64044i | −0.500000 | − | 0.866025i | 0.500000 | − | 0.866025i | −3.04892 | 2.37047 | − | 1.17511i | −1.00000 | −3.14795 | + | 5.45241i | −0.500000 | − | 0.866025i | |||||||||||||||||||||||
| 331.2 | 0.500000 | − | 0.866025i | 0.678448 | + | 1.17511i | −0.500000 | − | 0.866025i | 0.500000 | − | 0.866025i | 1.35690 | −2.20291 | − | 1.46533i | −1.00000 | 0.579417 | − | 1.00358i | −0.500000 | − | 0.866025i | |||||||||||||||||||||||
| 331.3 | 0.500000 | − | 0.866025i | 0.846011 | + | 1.46533i | −0.500000 | − | 0.866025i | 0.500000 | − | 0.866025i | 1.69202 | −0.167563 | + | 2.64044i | −1.00000 | 0.0685317 | − | 0.118700i | −0.500000 | − | 0.866025i | |||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.c | even | 3 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 770.2.i.k | ✓ | 6 |
| 7.c | even | 3 | 1 | inner | 770.2.i.k | ✓ | 6 |
| 7.c | even | 3 | 1 | 5390.2.a.bw | 3 | ||
| 7.d | odd | 6 | 1 | 5390.2.a.by | 3 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 770.2.i.k | ✓ | 6 | 1.a | even | 1 | 1 | trivial |
| 770.2.i.k | ✓ | 6 | 7.c | even | 3 | 1 | inner |
| 5390.2.a.bw | 3 | 7.c | even | 3 | 1 | ||
| 5390.2.a.by | 3 | 7.d | odd | 6 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(770, [\chi])\):
|
\( T_{3}^{6} + 7T_{3}^{4} - 14T_{3}^{3} + 49T_{3}^{2} - 49T_{3} + 49 \)
|
|
\( T_{13}^{3} + 6T_{13}^{2} - 16T_{13} - 104 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} - T + 1)^{3} \)
|
| $3$ |
\( T^{6} + 7 T^{4} + \cdots + 49 \)
|
| $5$ |
\( (T^{2} - T + 1)^{3} \)
|
| $7$ |
\( T^{6} - 7T^{3} + 343 \)
|
| $11$ |
\( (T^{2} + T + 1)^{3} \)
|
| $13$ |
\( (T^{3} + 6 T^{2} + \cdots - 104)^{2} \)
|
| $17$ |
\( T^{6} + 4 T^{5} + \cdots + 28561 \)
|
| $19$ |
\( T^{6} - 2 T^{5} + \cdots + 5041 \)
|
| $23$ |
\( T^{6} - 10 T^{5} + \cdots + 64 \)
|
| $29$ |
\( (T^{3} - 10 T^{2} + 17 T - 1)^{2} \)
|
| $31$ |
\( T^{6} - 12 T^{5} + \cdots + 729 \)
|
| $37$ |
\( T^{6} + 10 T^{5} + \cdots + 841 \)
|
| $41$ |
\( (T^{3} + 12 T^{2} + \cdots - 104)^{2} \)
|
| $43$ |
\( (T^{3} - 2 T^{2} + \cdots + 232)^{2} \)
|
| $47$ |
\( T^{6} - 4 T^{5} + \cdots + 10816 \)
|
| $53$ |
\( T^{6} + 4 T^{5} + \cdots + 57121 \)
|
| $59$ |
\( T^{6} - 8 T^{5} + \cdots + 4096 \)
|
| $61$ |
\( T^{6} - 22 T^{5} + \cdots + 142129 \)
|
| $67$ |
\( T^{6} + 9 T^{5} + \cdots + 28561 \)
|
| $71$ |
\( (T^{3} + 28 T^{2} + \cdots + 791)^{2} \)
|
| $73$ |
\( T^{6} + 23 T^{5} + \cdots + 32761 \)
|
| $79$ |
\( T^{6} + 28 T^{4} + \cdots + 3136 \)
|
| $83$ |
\( (T^{3} - 24 T^{2} + \cdots + 832)^{2} \)
|
| $89$ |
\( T^{6} - 12 T^{5} + \cdots + 9409 \)
|
| $97$ |
\( (T^{3} - 2 T^{2} + \cdots + 232)^{2} \)
|
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