Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [2394,4,Mod(1,2394)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2394, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("2394.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 2394 = 2 \cdot 3^{2} \cdot 7 \cdot 19 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 2394.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: | \(141.250572554\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | 4.4.6939601.2 |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} - 24x^{2} + 3x + 37 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 266) |
| 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 \(1,\beta_1,\beta_2,\beta_3\) 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
\( x^{4} - x^{3} - 24x^{2} + 3x + 37 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{3} - 24\nu - 9 ) / 4 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -\nu^{3} + 4\nu^{2} + 16\nu - 39 ) / 4 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{3} + \beta_{2} + 2\beta _1 + 12 \)
|
| \(\nu^{3}\) | \(=\) |
\( 4\beta_{2} + 24\beta _1 + 9 \)
|
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 |
|
2.00000 | 0 | 4.00000 | −13.1884 | 0 | −7.00000 | 8.00000 | 0 | −26.3767 | ||||||||||||||||||||||||||||||
| 1.2 | 2.00000 | 0 | 4.00000 | −10.9065 | 0 | −7.00000 | 8.00000 | 0 | −21.8129 | |||||||||||||||||||||||||||||||
| 1.3 | 2.00000 | 0 | 4.00000 | −0.886556 | 0 | −7.00000 | 8.00000 | 0 | −1.77311 | |||||||||||||||||||||||||||||||
| 1.4 | 2.00000 | 0 | 4.00000 | 17.9814 | 0 | −7.00000 | 8.00000 | 0 | 35.9628 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(3\) | \(-1\) |
| \(7\) | \(1\) |
| \(19\) | \(1\) |
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 | 2394.4.a.v | 4 | |
| 3.b | odd | 2 | 1 | 266.4.a.e | ✓ | 4 | |
| 12.b | even | 2 | 1 | 2128.4.a.h | 4 | ||
| 21.c | even | 2 | 1 | 1862.4.a.i | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 266.4.a.e | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 1862.4.a.i | 4 | 21.c | even | 2 | 1 | ||
| 2128.4.a.h | 4 | 12.b | even | 2 | 1 | ||
| 2394.4.a.v | 4 | 1.a | even | 1 | 1 | trivial | |
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(2394))\):
|
\( T_{5}^{4} + 7T_{5}^{3} - 284T_{5}^{2} - 2843T_{5} - 2293 \)
|
|
\( T_{11}^{4} + 48T_{11}^{3} - 2089T_{11}^{2} - 92926T_{11} - 323313 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T - 2)^{4} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} + 7 T^{3} + \cdots - 2293 \)
|
| $7$ |
\( (T + 7)^{4} \)
|
| $11$ |
\( T^{4} + 48 T^{3} + \cdots - 323313 \)
|
| $13$ |
\( T^{4} + 38 T^{3} + \cdots - 1860524 \)
|
| $17$ |
\( T^{4} - 73 T^{3} + \cdots - 14741872 \)
|
| $19$ |
\( (T + 19)^{4} \)
|
| $23$ |
\( T^{4} + 186 T^{3} + \cdots - 103551308 \)
|
| $29$ |
\( T^{4} - 56 T^{3} + \cdots - 265525 \)
|
| $31$ |
\( T^{4} + 19 T^{3} + \cdots + 662230748 \)
|
| $37$ |
\( T^{4} - 483 T^{3} + \cdots - 361612177 \)
|
| $41$ |
\( T^{4} + \cdots - 12570225597 \)
|
| $43$ |
\( T^{4} + \cdots + 8059536468 \)
|
| $47$ |
\( T^{4} - 31 T^{3} + \cdots + 191585969 \)
|
| $53$ |
\( T^{4} + \cdots + 15325956593 \)
|
| $59$ |
\( T^{4} + \cdots - 200143392615 \)
|
| $61$ |
\( T^{4} + \cdots + 6779460467 \)
|
| $67$ |
\( T^{4} + \cdots - 7711720156 \)
|
| $71$ |
\( T^{4} + \cdots - 96632191309 \)
|
| $73$ |
\( T^{4} + \cdots + 17761863284 \)
|
| $79$ |
\( T^{4} + \cdots - 59017129540 \)
|
| $83$ |
\( T^{4} + \cdots - 112881943632 \)
|
| $89$ |
\( T^{4} + \cdots - 2023005668220 \)
|
| $97$ |
\( T^{4} + \cdots + 64441975347 \)
|
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