Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2842,2,Mod(1,2842)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2842, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("2842.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2842 = 2 \cdot 7^{2} \cdot 29 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2842.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: | \(22.6934842544\) |
| Analytic rank: | \(1\) |
| Dimension: | \(6\) |
| Coefficient field: | 6.6.52756992.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{6} - 2x^{5} - 13x^{4} + 18x^{3} + 22x^{2} - 20x - 7 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2^{3} \) |
| 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 \(1,\beta_1,\ldots,\beta_{5}\) 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
\( x^{6} - 2x^{5} - 13x^{4} + 18x^{3} + 22x^{2} - 20x - 7 \)
:
| \(\beta_{1}\) | \(=\) |
\( ( \nu^{4} - 5\nu^{3} - 12\nu^{2} + 47\nu + 16 ) / 11 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 2\nu^{5} - 3\nu^{4} - 26\nu^{3} + 21\nu^{2} + 31\nu - 9 ) / 11 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 2\nu^{4} + \nu^{3} - 35\nu^{2} - 16\nu + 65 ) / 11 \)
|
| \(\beta_{4}\) | \(=\) |
\( ( 6\nu^{4} - 8\nu^{3} - 72\nu^{2} + 40\nu + 63 ) / 11 \)
|
| \(\beta_{5}\) | \(=\) |
\( ( 4\nu^{5} - 6\nu^{4} - 52\nu^{3} + 42\nu^{2} + 84\nu - 29 ) / 11 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_{5} - 2\beta_{2} + 1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{5} + \beta_{4} - 2\beta_{3} - 2\beta_{2} - 2\beta _1 + 10 ) / 2 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 11\beta_{5} + \beta_{4} - 22\beta_{2} - 6\beta _1 + 14 ) / 2 \)
|
| \(\nu^{4}\) | \(=\) |
\( ( 20\beta_{5} + 17\beta_{4} - 24\beta_{3} - 40\beta_{2} - 32\beta _1 + 111 ) / 2 \)
|
| \(\nu^{5}\) | \(=\) |
\( ( 147\beta_{5} + 28\beta_{4} - 15\beta_{3} - 283\beta_{2} - 105\beta _1 + 237 ) / 2 \)
|
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 |
|
−1.00000 | −1.41421 | 1.00000 | −4.16178 | 1.41421 | 0 | −1.00000 | −1.00000 | 4.16178 | ||||||||||||||||||||||||||||||||||||
| 1.2 | −1.00000 | −1.41421 | 1.00000 | −0.157351 | 1.41421 | 0 | −1.00000 | −1.00000 | 0.157351 | |||||||||||||||||||||||||||||||||||||
| 1.3 | −1.00000 | −1.41421 | 1.00000 | 4.31913 | 1.41421 | 0 | −1.00000 | −1.00000 | −4.31913 | |||||||||||||||||||||||||||||||||||||
| 1.4 | −1.00000 | 1.41421 | 1.00000 | −4.31913 | −1.41421 | 0 | −1.00000 | −1.00000 | 4.31913 | |||||||||||||||||||||||||||||||||||||
| 1.5 | −1.00000 | 1.41421 | 1.00000 | 0.157351 | −1.41421 | 0 | −1.00000 | −1.00000 | −0.157351 | |||||||||||||||||||||||||||||||||||||
| 1.6 | −1.00000 | 1.41421 | 1.00000 | 4.16178 | −1.41421 | 0 | −1.00000 | −1.00000 | −4.16178 | |||||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(1\) |
| \(7\) | \(1\) |
| \(29\) | \(1\) |
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.b | odd | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 2842.2.a.ba | ✓ | 6 |
| 7.b | odd | 2 | 1 | inner | 2842.2.a.ba | ✓ | 6 |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 2842.2.a.ba | ✓ | 6 | 1.a | even | 1 | 1 | trivial |
| 2842.2.a.ba | ✓ | 6 | 7.b | odd | 2 | 1 | inner |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(2842))\):
|
\( T_{3}^{2} - 2 \)
|
|
\( T_{5}^{6} - 36T_{5}^{4} + 324T_{5}^{2} - 8 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T + 1)^{6} \)
|
| $3$ |
\( (T^{2} - 2)^{3} \)
|
| $5$ |
\( T^{6} - 36 T^{4} + \cdots - 8 \)
|
| $7$ |
\( T^{6} \)
|
| $11$ |
\( (T^{3} + 2 T^{2} - 24 T + 24)^{2} \)
|
| $13$ |
\( T^{6} - 36 T^{4} + \cdots - 8 \)
|
| $17$ |
\( T^{6} - 66 T^{4} + \cdots - 6728 \)
|
| $19$ |
\( T^{6} - 70 T^{4} + \cdots - 648 \)
|
| $23$ |
\( (T^{3} + 16 T^{2} + \cdots + 56)^{2} \)
|
| $29$ |
\( (T + 1)^{6} \)
|
| $31$ |
\( T^{6} - 212 T^{4} + \cdots - 250632 \)
|
| $37$ |
\( (T^{3} + 10 T^{2} + \cdots - 648)^{2} \)
|
| $41$ |
\( T^{6} - 90 T^{4} + \cdots - 8 \)
|
| $43$ |
\( (T^{3} + 10 T^{2} + \cdots - 168)^{2} \)
|
| $47$ |
\( T^{6} - 268 T^{4} + \cdots - 60552 \)
|
| $53$ |
\( (T^{3} - 14 T^{2} + \cdots + 248)^{2} \)
|
| $59$ |
\( T^{6} - 50 T^{4} + \cdots - 648 \)
|
| $61$ |
\( T^{6} - 112 T^{4} + \cdots - 4608 \)
|
| $67$ |
\( (T + 4)^{6} \)
|
| $71$ |
\( (T^{3} + 12 T^{2} + \cdots - 648)^{2} \)
|
| $73$ |
\( T^{6} - 218 T^{4} + \cdots - 8712 \)
|
| $79$ |
\( (T^{3} + 4 T^{2} + \cdots - 168)^{2} \)
|
| $83$ |
\( T^{6} - 266 T^{4} + \cdots - 3528 \)
|
| $89$ |
\( T^{6} - 330 T^{4} + \cdots - 22472 \)
|
| $97$ |
\( T^{6} - 242 T^{4} + \cdots - 78408 \)
|
| show more | |
| show less |