Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2793,2,Mod(1,2793)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2793, 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("2793.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2793 = 3 \cdot 7^{2} \cdot 19 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2793.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: | \(22.3022172845\) |
| Analytic rank: | \(0\) |
| Dimension: | \(5\) |
| Coefficient field: | 5.5.1244416.1 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - 2x^{4} - 8x^{3} + 4x^{2} + 14x + 4 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 2 \) |
| 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
\( x^{5} - 2x^{4} - 8x^{3} + 4x^{2} + 14x + 4 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - 2\nu - 3 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{3} - 3\nu^{2} - 3\nu + 4 \)
|
| \(\beta_{4}\) | \(=\) |
\( \nu^{4} - 3\nu^{3} - 5\nu^{2} + 8\nu + 6 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + 2\beta _1 + 3 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} + 3\beta_{2} + 9\beta _1 + 5 \)
|
| \(\nu^{4}\) | \(=\) |
\( \beta_{4} + 3\beta_{3} + 14\beta_{2} + 29\beta _1 + 24 \)
|
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 |
|
−2.59118 | −1.00000 | 4.71424 | 2.37338 | 2.59118 | 0 | −7.03309 | 1.00000 | −6.14986 | |||||||||||||||||||||||||||||||||
| 1.2 | −0.635242 | −1.00000 | −1.59647 | 0.255770 | 0.635242 | 0 | 2.28463 | 1.00000 | −0.162476 | ||||||||||||||||||||||||||||||||||
| 1.3 | 1.33838 | −1.00000 | −0.208743 | −2.84982 | −1.33838 | 0 | −2.95613 | 1.00000 | −3.81413 | ||||||||||||||||||||||||||||||||||
| 1.4 | 2.17526 | −1.00000 | 2.73176 | 3.53051 | −2.17526 | 0 | 1.59177 | 1.00000 | 7.67979 | ||||||||||||||||||||||||||||||||||
| 1.5 | 2.71279 | −1.00000 | 5.35921 | −1.30984 | −2.71279 | 0 | 9.11283 | 1.00000 | −3.55333 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \( +1 \) |
| \(7\) | \( -1 \) |
| \(19\) | \( +1 \) |
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 | 2793.2.a.bf | ✓ | 5 |
| 3.b | odd | 2 | 1 | 8379.2.a.cc | 5 | ||
| 7.b | odd | 2 | 1 | 2793.2.a.bh | yes | 5 | |
| 21.c | even | 2 | 1 | 8379.2.a.cd | 5 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 2793.2.a.bf | ✓ | 5 | 1.a | even | 1 | 1 | trivial |
| 2793.2.a.bh | yes | 5 | 7.b | odd | 2 | 1 | |
| 8379.2.a.cc | 5 | 3.b | odd | 2 | 1 | ||
| 8379.2.a.cd | 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 \(S_{2}^{\mathrm{new}}(\Gamma_0(2793))\):
|
\( T_{2}^{5} - 3T_{2}^{4} - 6T_{2}^{3} + 22T_{2}^{2} - 5T_{2} - 13 \)
|
|
\( T_{5}^{5} - 2T_{5}^{4} - 12T_{5}^{3} + 16T_{5}^{2} + 28T_{5} - 8 \)
|
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\( T_{11} - 2 \)
|
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\( T_{13}^{5} - 2T_{13}^{4} - 48T_{13}^{3} + 96T_{13}^{2} + 320T_{13} - 128 \)
|
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\( T_{17}^{5} - 2T_{17}^{4} - 12T_{17}^{3} + 16T_{17}^{2} + 28T_{17} - 8 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} - 3 T^{4} + \cdots - 13 \)
|
| $3$ |
\( (T + 1)^{5} \)
|
| $5$ |
\( T^{5} - 2 T^{4} + \cdots - 8 \)
|
| $7$ |
\( T^{5} \)
|
| $11$ |
\( (T - 2)^{5} \)
|
| $13$ |
\( T^{5} - 2 T^{4} + \cdots - 128 \)
|
| $17$ |
\( T^{5} - 2 T^{4} + \cdots - 8 \)
|
| $19$ |
\( (T + 1)^{5} \)
|
| $23$ |
\( T^{5} - 14 T^{4} + \cdots - 352 \)
|
| $29$ |
\( T^{5} - 6 T^{4} + \cdots - 3608 \)
|
| $31$ |
\( T^{5} - 8 T^{4} + \cdots - 4736 \)
|
| $37$ |
\( T^{5} - 14 T^{4} + \cdots - 352 \)
|
| $41$ |
\( T^{5} - 8 T^{4} + \cdots - 2048 \)
|
| $43$ |
\( T^{5} - 16 T^{4} + \cdots - 6272 \)
|
| $47$ |
\( T^{5} - 4 T^{4} + \cdots + 1952 \)
|
| $53$ |
\( T^{5} - 10 T^{4} + \cdots - 9608 \)
|
| $59$ |
\( T^{5} - 4 T^{4} + \cdots - 12544 \)
|
| $61$ |
\( T^{5} - 176 T^{3} + \cdots - 6656 \)
|
| $67$ |
\( T^{5} - 2 T^{4} + \cdots - 1696 \)
|
| $71$ |
\( T^{5} - 16 T^{4} + \cdots - 5584 \)
|
| $73$ |
\( T^{5} + 8 T^{4} + \cdots - 4096 \)
|
| $79$ |
\( T^{5} - 6 T^{4} + \cdots - 31456 \)
|
| $83$ |
\( T^{5} - 16 T^{4} + \cdots + 11792 \)
|
| $89$ |
\( T^{5} + 8 T^{4} + \cdots + 512 \)
|
| $97$ |
\( T^{5} + 26 T^{4} + \cdots + 23584 \)
|
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