Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [9,62,Mod(1,9)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(9, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0]))
N = Newforms(chi, 62, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("9.1");
S:= CuspForms(chi, 62);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 9 = 3^{2} \) |
| Weight: | \( k \) | \(=\) | \( 62 \) |
| Character orbit: | \([\chi]\) | \(=\) | 9.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: | \(212.090564938\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\mathbb{Q}[x]/(x^{4} - \cdots)\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} - 180363795469121x^{2} + 166129321978984507920x + 2785609847439483545242446300 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2^{28}\cdot 3^{10}\cdot 5^{2}\cdot 7 \) |
| Twist minimal: | no (minimal twist has level 1) |
| 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
\( x^{4} - x^{3} - 180363795469121x^{2} + 166129321978984507920x + 2785609847439483545242446300 \)
:
| \(\beta_{1}\) | \(=\) |
\( 192\nu - 48 \)
|
| \(\beta_{2}\) | \(=\) |
\( ( 108\nu^{3} + 186256044\nu^{2} - 15885966350153172\nu - 3340459070129947691688 ) / 13402613 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( -4104\nu^{3} + 486996195960\nu^{2} + 1286287826053639416\nu - 44429586960648335446356720 ) / 13402613 \)
|
| \(\nu\) | \(=\) |
\( ( \beta _1 + 48 ) / 192 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} + 38\beta_{2} - 265270530\beta _1 + 3324465478086847488 ) / 36864 \)
|
| \(\nu^{3}\) | \(=\) |
\( ( -5173779\beta_{3} + 13527672110\beta_{2} + 86097604964916454\beta _1 - 13779415522130239634116608 ) / 110592 \)
|
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 |
|
−2.84183e9 | 0 | 5.77017e18 | 6.89620e20 | 0 | −9.80127e25 | −9.84504e27 | 0 | −1.95979e30 | ||||||||||||||||||||||||||||||
| 1.2 | −9.80478e8 | 0 | −1.34451e18 | −1.59503e20 | 0 | 1.63507e25 | 3.57909e27 | 0 | 1.56389e29 | |||||||||||||||||||||||||||||||
| 1.3 | 6.27881e8 | 0 | −1.91161e18 | −2.33985e20 | 0 | 6.25792e25 | −2.64806e27 | 0 | −1.46915e29 | |||||||||||||||||||||||||||||||
| 1.4 | 2.04812e9 | 0 | 1.88894e18 | 2.27994e20 | 0 | −4.42559e25 | −8.53860e26 | 0 | 4.66958e29 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
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 | 9.62.a.a | 4 | |
| 3.b | odd | 2 | 1 | 1.62.a.a | ✓ | 4 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 1.62.a.a | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 9.62.a.a | 4 | 1.a | even | 1 | 1 | trivial | |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{4} + 1146312000 T_{2}^{3} + \cdots + 35\!\cdots\!56 \)
acting on \(S_{62}^{\mathrm{new}}(\Gamma_0(9))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + \cdots + 35\!\cdots\!56 \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} + \cdots + 58\!\cdots\!00 \)
|
| $7$ |
\( T^{4} + \cdots + 44\!\cdots\!96 \)
|
| $11$ |
\( T^{4} + \cdots + 35\!\cdots\!36 \)
|
| $13$ |
\( T^{4} + \cdots - 44\!\cdots\!84 \)
|
| $17$ |
\( T^{4} + \cdots - 35\!\cdots\!24 \)
|
| $19$ |
\( T^{4} + \cdots + 66\!\cdots\!00 \)
|
| $23$ |
\( T^{4} + \cdots + 35\!\cdots\!76 \)
|
| $29$ |
\( T^{4} + \cdots - 32\!\cdots\!00 \)
|
| $31$ |
\( T^{4} + \cdots + 16\!\cdots\!76 \)
|
| $37$ |
\( T^{4} + \cdots + 20\!\cdots\!36 \)
|
| $41$ |
\( T^{4} + \cdots - 87\!\cdots\!04 \)
|
| $43$ |
\( T^{4} + \cdots + 59\!\cdots\!96 \)
|
| $47$ |
\( T^{4} + \cdots + 22\!\cdots\!16 \)
|
| $53$ |
\( T^{4} + \cdots - 32\!\cdots\!44 \)
|
| $59$ |
\( T^{4} + \cdots + 61\!\cdots\!00 \)
|
| $61$ |
\( T^{4} + \cdots - 16\!\cdots\!64 \)
|
| $67$ |
\( T^{4} + \cdots - 47\!\cdots\!24 \)
|
| $71$ |
\( T^{4} + \cdots - 52\!\cdots\!44 \)
|
| $73$ |
\( T^{4} + \cdots + 40\!\cdots\!76 \)
|
| $79$ |
\( T^{4} + \cdots - 13\!\cdots\!00 \)
|
| $83$ |
\( T^{4} + \cdots + 65\!\cdots\!36 \)
|
| $89$ |
\( T^{4} + \cdots + 29\!\cdots\!00 \)
|
| $97$ |
\( T^{4} + \cdots - 20\!\cdots\!84 \)
|
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