Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1710,2,Mod(647,1710)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1710, base_ring=CyclotomicField(4))
chi = DirichletCharacter(H, H._module([2, 1, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("1710.647");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1710 = 2 \cdot 3^{2} \cdot 5 \cdot 19 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1710.n (of order \(4\), 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: | \(13.6544187456\) |
| Analytic rank: | \(0\) |
| Dimension: | \(8\) |
| Relative dimension: | \(4\) over \(\Q(i)\) |
| Coefficient field: | 8.0.110166016.2 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{8} + 10x^{6} + 19x^{4} + 10x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{4}]$ |
$q$-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 \(1,\beta_1,\ldots,\beta_{7}\) 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
\( x^{8} + 10x^{6} + 19x^{4} + 10x^{2} + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( \nu^{4} + 9\nu^{2} + 7 ) / 2 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{6} + \nu^{5} + 10\nu^{4} + 9\nu^{3} + 18\nu^{2} + 9\nu + 5 ) / 4 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( \nu^{6} - \nu^{5} + 10\nu^{4} - 9\nu^{3} + 18\nu^{2} - 9\nu + 5 ) / 4 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( 3\nu^{6} + \nu^{5} + 28\nu^{4} + 9\nu^{3} + 40\nu^{2} + 13\nu + 13 ) / 4 \)
|
| \(\beta_{5}\) | \(=\) |
\( ( 2\nu^{7} + 19\nu^{5} + 29\nu^{3} + 9\nu ) / 2 \)
|
| \(\beta_{6}\) | \(=\) |
\( ( -3\nu^{6} + \nu^{5} - 28\nu^{4} + 9\nu^{3} - 40\nu^{2} + 13\nu - 13 ) / 4 \)
|
| \(\beta_{7}\) | \(=\) |
\( ( 3\nu^{7} + 29\nu^{5} + 47\nu^{3} + 14\nu ) / 2 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{6} + \beta_{4} + \beta_{3} - \beta_{2} ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( -\beta_{6} + \beta_{4} - 3\beta_{3} - 3\beta_{2} + 2\beta _1 - 6 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( -2\beta_{7} - 2\beta_{6} + 3\beta_{5} - 2\beta_{4} - 3\beta_{3} + 3\beta_{2} \)
|
| \(\nu^{4}\) | \(=\) |
\( ( 9\beta_{6} - 9\beta_{4} + 27\beta_{3} + 27\beta_{2} - 14\beta _1 + 40 ) / 2 \)
|
| \(\nu^{5}\) | \(=\) |
\( ( 36\beta_{7} + 27\beta_{6} - 54\beta_{5} + 27\beta_{4} + 41\beta_{3} - 41\beta_{2} ) / 2 \)
|
| \(\nu^{6}\) | \(=\) |
\( -36\beta_{6} + 36\beta_{4} - 106\beta_{3} - 106\beta_{2} + 52\beta _1 - 151 \)
|
| \(\nu^{7}\) | \(=\) |
\( ( -284\beta_{7} - 203\beta_{6} + 428\beta_{5} - 203\beta_{4} - 307\beta_{3} + 307\beta_{2} ) / 2 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1710\mathbb{Z}\right)^\times\).
| \(n\) | \(191\) | \(1027\) | \(1351\) |
| \(\chi(n)\) | \(-1\) | \(-\beta_{5}\) | \(1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 647.1 |
|
−0.707107 | + | 0.707107i | 0 | − | 1.00000i | −0.292893 | − | 2.21680i | 0 | −2.41421 | − | 2.41421i | 0.707107 | + | 0.707107i | 0 | 1.77462 | + | 1.36041i | |||||||||||||||||||||||||||||||
| 647.2 | −0.707107 | + | 0.707107i | 0 | − | 1.00000i | −0.292893 | + | 2.21680i | 0 | −2.41421 | − | 2.41421i | 0.707107 | + | 0.707107i | 0 | −1.36041 | − | 1.77462i | ||||||||||||||||||||||||||||||||
| 647.3 | 0.707107 | − | 0.707107i | 0 | − | 1.00000i | −1.70711 | − | 1.44423i | 0 | 0.414214 | + | 0.414214i | −0.707107 | − | 0.707107i | 0 | −2.22833 | + | 0.185885i | ||||||||||||||||||||||||||||||||
| 647.4 | 0.707107 | − | 0.707107i | 0 | − | 1.00000i | −1.70711 | + | 1.44423i | 0 | 0.414214 | + | 0.414214i | −0.707107 | − | 0.707107i | 0 | −0.185885 | + | 2.22833i | ||||||||||||||||||||||||||||||||
| 1673.1 | −0.707107 | − | 0.707107i | 0 | 1.00000i | −0.292893 | − | 2.21680i | 0 | −2.41421 | + | 2.41421i | 0.707107 | − | 0.707107i | 0 | −1.36041 | + | 1.77462i | |||||||||||||||||||||||||||||||||
| 1673.2 | −0.707107 | − | 0.707107i | 0 | 1.00000i | −0.292893 | + | 2.21680i | 0 | −2.41421 | + | 2.41421i | 0.707107 | − | 0.707107i | 0 | 1.77462 | − | 1.36041i | |||||||||||||||||||||||||||||||||
| 1673.3 | 0.707107 | + | 0.707107i | 0 | 1.00000i | −1.70711 | − | 1.44423i | 0 | 0.414214 | − | 0.414214i | −0.707107 | + | 0.707107i | 0 | −0.185885 | − | 2.22833i | |||||||||||||||||||||||||||||||||
| 1673.4 | 0.707107 | + | 0.707107i | 0 | 1.00000i | −1.70711 | + | 1.44423i | 0 | 0.414214 | − | 0.414214i | −0.707107 | + | 0.707107i | 0 | −2.22833 | − | 0.185885i | |||||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 15.e | even | 4 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 1710.2.n.f | ✓ | 8 |
| 3.b | odd | 2 | 1 | 1710.2.n.g | yes | 8 | |
| 5.c | odd | 4 | 1 | 1710.2.n.g | yes | 8 | |
| 15.e | even | 4 | 1 | inner | 1710.2.n.f | ✓ | 8 |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 1710.2.n.f | ✓ | 8 | 1.a | even | 1 | 1 | trivial |
| 1710.2.n.f | ✓ | 8 | 15.e | even | 4 | 1 | inner |
| 1710.2.n.g | yes | 8 | 3.b | odd | 2 | 1 | |
| 1710.2.n.g | yes | 8 | 5.c | odd | 4 | 1 | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1710, [\chi])\):
|
\( T_{7}^{4} + 4T_{7}^{3} + 8T_{7}^{2} - 8T_{7} + 4 \)
|
|
\( T_{17}^{8} + 192T_{17}^{5} + 2160T_{17}^{4} + 8448T_{17}^{3} + 18432T_{17}^{2} + 21504T_{17} + 12544 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{4} + 1)^{2} \)
|
| $3$ |
\( T^{8} \)
|
| $5$ |
\( (T^{4} + 4 T^{3} + 12 T^{2} + \cdots + 25)^{2} \)
|
| $7$ |
\( (T^{4} + 4 T^{3} + 8 T^{2} + \cdots + 4)^{2} \)
|
| $11$ |
\( (T^{4} + 36 T^{2} + 196)^{2} \)
|
| $13$ |
\( T^{8} + 1824 T^{4} + 430336 \)
|
| $17$ |
\( T^{8} + 192 T^{5} + \cdots + 12544 \)
|
| $19$ |
\( (T^{2} + 1)^{4} \)
|
| $23$ |
\( T^{8} - 8 T^{7} + \cdots + 256 \)
|
| $29$ |
\( (T^{4} - 112 T^{2} + 2624)^{2} \)
|
| $31$ |
\( (T^{4} - 8 T^{3} - 40 T^{2} + \cdots - 64)^{2} \)
|
| $37$ |
\( (T^{4} + 16)^{2} \)
|
| $41$ |
\( T^{8} + 128 T^{6} + \cdots + 256 \)
|
| $43$ |
\( T^{8} - 8 T^{7} + \cdots + 204304 \)
|
| $47$ |
\( T^{8} - 24 T^{7} + \cdots + 1679616 \)
|
| $53$ |
\( (T^{4} + 1296)^{2} \)
|
| $59$ |
\( (T^{4} + 16 T^{3} + \cdots - 16)^{2} \)
|
| $61$ |
\( (T^{4} - 72 T^{2} + \cdots + 272)^{2} \)
|
| $67$ |
\( T^{8} - 128 T^{5} + \cdots + 200704 \)
|
| $71$ |
\( T^{8} + 288 T^{6} + \cdots + 65536 \)
|
| $73$ |
\( (T^{4} - 4 T^{3} + \cdots + 196)^{2} \)
|
| $79$ |
\( T^{8} + 240 T^{6} + \cdots + 4096 \)
|
| $83$ |
\( T^{8} - 96 T^{5} + \cdots + 99361024 \)
|
| $89$ |
\( (T^{4} + 8 T^{3} + \cdots - 4112)^{2} \)
|
| $97$ |
\( T^{8} - 24 T^{7} + \cdots + 9834496 \)
|
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