Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1071,2,Mod(1,1071)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1071, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("1071.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1071 = 3^{2} \cdot 7 \cdot 17 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1071.a (trivial) |
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: | yes |
| Analytic conductor: | \(8.55197805648\) |
| Analytic rank: | \(1\) |
| Dimension: | \(5\) |
| Coefficient field: | 5.5.1224176.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - 2x^{4} - 5x^{3} + 8x^{2} + 2x - 2 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Fricke sign: | \(+1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-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 \(1,\beta_1,\beta_2,\beta_3,\beta_4\) 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
\( x^{5} - 2x^{4} - 5x^{3} + 8x^{2} + 2x - 2 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - \nu - 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{4} - \nu^{3} - 6\nu^{2} + 3\nu + 4 \)
|
| \(\beta_{4}\) | \(=\) |
\( -\nu^{4} + 2\nu^{3} + 5\nu^{2} - 7\nu - 2 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + \beta _1 + 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{4} + \beta_{3} + \beta_{2} + 5\beta_1 \)
|
| \(\nu^{4}\) | \(=\) |
\( \beta_{4} + 2\beta_{3} + 7\beta_{2} + 8\beta _1 + 8 \)
|
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−2.68829 | 0 | 5.22692 | 0.503666 | 0 | −1.00000 | −8.67492 | 0 | −1.35400 | |||||||||||||||||||||||||||||||||
| 1.2 | −1.45526 | 0 | 0.117782 | −3.93783 | 0 | −1.00000 | 2.73912 | 0 | 5.73057 | ||||||||||||||||||||||||||||||||||
| 1.3 | −0.449855 | 0 | −1.79763 | 3.08526 | 0 | −1.00000 | 1.70838 | 0 | −1.38792 | ||||||||||||||||||||||||||||||||||
| 1.4 | 0.558450 | 0 | −1.68813 | −0.275123 | 0 | −1.00000 | −2.05964 | 0 | −0.153642 | ||||||||||||||||||||||||||||||||||
| 1.5 | 2.03496 | 0 | 2.14106 | −2.37597 | 0 | −1.00000 | 0.287051 | 0 | −4.83501 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \( +1 \) |
| \(7\) | \( +1 \) |
| \(17\) | \( +1 \) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 1071.2.a.l | ✓ | 5 |
| 3.b | odd | 2 | 1 | 1071.2.a.n | yes | 5 | |
| 7.b | odd | 2 | 1 | 7497.2.a.bq | 5 | ||
| 21.c | even | 2 | 1 | 7497.2.a.bu | 5 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 1071.2.a.l | ✓ | 5 | 1.a | even | 1 | 1 | trivial |
| 1071.2.a.n | yes | 5 | 3.b | odd | 2 | 1 | |
| 7497.2.a.bq | 5 | 7.b | odd | 2 | 1 | ||
| 7497.2.a.bu | 5 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(1071))\):
|
\( T_{2}^{5} + 2T_{2}^{4} - 5T_{2}^{3} - 8T_{2}^{2} + 2T_{2} + 2 \)
|
|
\( T_{11}^{5} + 7T_{11}^{4} - 5T_{11}^{3} - 71T_{11}^{2} - 56T_{11} + 36 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} + 2 T^{4} + \cdots + 2 \)
|
| $3$ |
\( T^{5} \)
|
| $5$ |
\( T^{5} + 3 T^{4} + \cdots + 4 \)
|
| $7$ |
\( (T + 1)^{5} \)
|
| $11$ |
\( T^{5} + 7 T^{4} + \cdots + 36 \)
|
| $13$ |
\( T^{5} - 5 T^{4} + \cdots - 292 \)
|
| $17$ |
\( (T + 1)^{5} \)
|
| $19$ |
\( T^{5} - 3 T^{4} + \cdots - 2104 \)
|
| $23$ |
\( T^{5} + 11 T^{4} + \cdots - 124 \)
|
| $29$ |
\( T^{5} + 22 T^{4} + \cdots - 3168 \)
|
| $31$ |
\( T^{5} + 6 T^{4} + \cdots + 32 \)
|
| $37$ |
\( T^{5} + 10 T^{4} + \cdots + 424 \)
|
| $41$ |
\( T^{5} + 27 T^{4} + \cdots - 132 \)
|
| $43$ |
\( T^{5} + T^{4} + \cdots + 30448 \)
|
| $47$ |
\( T^{5} - 16 T^{4} + \cdots + 7584 \)
|
| $53$ |
\( T^{5} + 4 T^{4} + \cdots - 1248 \)
|
| $59$ |
\( T^{5} + 8 T^{4} + \cdots - 21792 \)
|
| $61$ |
\( T^{5} + 20 T^{4} + \cdots + 3592 \)
|
| $67$ |
\( T^{5} - 4 T^{4} + \cdots + 11072 \)
|
| $71$ |
\( T^{5} + 4 T^{4} + \cdots - 23824 \)
|
| $73$ |
\( T^{5} + 8 T^{4} + \cdots + 1152 \)
|
| $79$ |
\( T^{5} - 6 T^{4} + \cdots - 576 \)
|
| $83$ |
\( T^{5} + 6 T^{4} + \cdots - 58624 \)
|
| $89$ |
\( T^{5} + 20 T^{4} + \cdots + 273344 \)
|
| $97$ |
\( T^{5} + 18 T^{4} + \cdots - 7072 \)
|
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