Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [825,4,Mod(1,825)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(825, 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("825.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 825 = 3 \cdot 5^{2} \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 825.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: | \(48.6765757547\) |
| Analytic rank: | \(1\) |
| Dimension: | \(5\) |
| Coefficient field: | \(\mathbb{Q}[x]/(x^{5} - \cdots)\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{5} - x^{4} - 21x^{3} + 17x^{2} + 78x - 30 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| 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
\( x^{5} - x^{4} - 21x^{3} + 17x^{2} + 78x - 30 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - 9 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{3} - 14\nu \)
|
| \(\beta_{4}\) | \(=\) |
\( ( \nu^{4} - 19\nu^{2} + 46 ) / 2 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + 9 \)
|
| \(\nu^{3}\) | \(=\) |
\( \beta_{3} + 14\beta_1 \)
|
| \(\nu^{4}\) | \(=\) |
\( 2\beta_{4} + 19\beta_{2} + 125 \)
|
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 |
|
−3.98707 | −3.00000 | 7.89672 | 0 | 11.9612 | 12.5627 | 0.411800 | 9.00000 | 0 | |||||||||||||||||||||||||||||||||
| 1.2 | −1.98454 | −3.00000 | −4.06159 | 0 | 5.95363 | 5.59777 | 23.9367 | 9.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.3 | 0.368634 | −3.00000 | −7.86411 | 0 | −1.10590 | −26.5824 | −5.84806 | 9.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.4 | 2.51748 | −3.00000 | −1.66228 | 0 | −7.55245 | 18.4627 | −24.3246 | 9.00000 | 0 | ||||||||||||||||||||||||||||||||||
| 1.5 | 4.08549 | −3.00000 | 8.69126 | 0 | −12.2565 | 7.95915 | 2.82414 | 9.00000 | 0 | ||||||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(1\) |
| \(5\) | \(-1\) |
| \(11\) | \(1\) |
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 | 825.4.a.y | yes | 5 |
| 3.b | odd | 2 | 1 | 2475.4.a.bi | 5 | ||
| 5.b | even | 2 | 1 | 825.4.a.x | ✓ | 5 | |
| 5.c | odd | 4 | 2 | 825.4.c.s | 10 | ||
| 15.d | odd | 2 | 1 | 2475.4.a.bj | 5 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 825.4.a.x | ✓ | 5 | 5.b | even | 2 | 1 | |
| 825.4.a.y | yes | 5 | 1.a | even | 1 | 1 | trivial |
| 825.4.c.s | 10 | 5.c | odd | 4 | 2 | ||
| 2475.4.a.bi | 5 | 3.b | odd | 2 | 1 | ||
| 2475.4.a.bj | 5 | 15.d | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(825))\):
|
\( T_{2}^{5} - T_{2}^{4} - 21T_{2}^{3} + 17T_{2}^{2} + 78T_{2} - 30 \)
|
|
\( T_{7}^{5} - 18T_{7}^{4} - 488T_{7}^{3} + 14004T_{7}^{2} - 109997T_{7} + 274698 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{5} - T^{4} + \cdots - 30 \)
|
| $3$ |
\( (T + 3)^{5} \)
|
| $5$ |
\( T^{5} \)
|
| $7$ |
\( T^{5} - 18 T^{4} + \cdots + 274698 \)
|
| $11$ |
\( (T + 11)^{5} \)
|
| $13$ |
\( T^{5} - 31 T^{4} + \cdots - 160971832 \)
|
| $17$ |
\( T^{5} + \cdots - 2998274400 \)
|
| $19$ |
\( T^{5} + 57 T^{4} + \cdots - 92396817 \)
|
| $23$ |
\( T^{5} + \cdots - 3646836204 \)
|
| $29$ |
\( T^{5} + \cdots + 16041054816 \)
|
| $31$ |
\( T^{5} + \cdots + 9419016168 \)
|
| $37$ |
\( T^{5} + \cdots - 117286555496 \)
|
| $41$ |
\( T^{5} + \cdots + 144243119304 \)
|
| $43$ |
\( T^{5} + \cdots + 106386652548 \)
|
| $47$ |
\( T^{5} + \cdots + 9919512777600 \)
|
| $53$ |
\( T^{5} + \cdots + 6507197476032 \)
|
| $59$ |
\( T^{5} + \cdots - 849531990720 \)
|
| $61$ |
\( T^{5} + \cdots + 105472451720 \)
|
| $67$ |
\( T^{5} + \cdots + 33338076430840 \)
|
| $71$ |
\( T^{5} + \cdots + 13467667404912 \)
|
| $73$ |
\( T^{5} + \cdots + 28282570016 \)
|
| $79$ |
\( T^{5} + \cdots + 57405986771584 \)
|
| $83$ |
\( T^{5} + \cdots - 22148729580384 \)
|
| $89$ |
\( T^{5} + \cdots - 205516733649744 \)
|
| $97$ |
\( T^{5} + \cdots - 46307548394375 \)
|
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