Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [45,22,Mod(1,45)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(45, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 22, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("45.1");
S:= CuspForms(chi, 22);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 45 = 3^{2} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 22 \) |
| Character orbit: | \([\chi]\) | \(=\) | 45.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: | \(125.764804929\) |
| 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: |
\( x^{4} - x^{3} - 3512166x^{2} + 363520480x + 2321089280000 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{11}]\) |
| Coefficient ring index: | \( 2^{5}\cdot 3^{4}\cdot 5^{2}\cdot 7^{2} \) |
| Twist minimal: | no (minimal twist has level 15) |
| 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
\( x^{4} - x^{3} - 3512166x^{2} + 363520480x + 2321089280000 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} + 154\nu - 1756122 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( \nu^{3} + 711\nu^{2} - 2080768\nu - 978048758 ) / 22 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} - 154\beta _1 + 1756122 \)
|
| \(\nu^{3}\) | \(=\) |
\( 22\beta_{3} - 711\beta_{2} + 2190262\beta _1 - 270553984 \)
|
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 |
|
−1487.97 | 0 | 116903. | −9.76562e6 | 0 | −1.26833e9 | 2.94655e9 | 0 | 1.45310e10 | ||||||||||||||||||||||||||||||
| 1.2 | −625.272 | 0 | −1.70619e6 | −9.76562e6 | 0 | 3.78633e8 | 2.37812e9 | 0 | 6.10617e9 | |||||||||||||||||||||||||||||||
| 1.3 | 1293.36 | 0 | −424379. | −9.76562e6 | 0 | 1.27960e9 | −3.26124e9 | 0 | −1.26304e10 | |||||||||||||||||||||||||||||||
| 1.4 | 1716.88 | 0 | 850541. | −9.76562e6 | 0 | −6.24477e8 | −2.14029e9 | 0 | −1.67665e10 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
| \(5\) | \(1\) |
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 | 45.22.a.g | 4 | |
| 3.b | odd | 2 | 1 | 15.22.a.e | ✓ | 4 | |
| 15.d | odd | 2 | 1 | 75.22.a.h | 4 | ||
| 15.e | even | 4 | 2 | 75.22.b.h | 8 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 15.22.a.e | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 45.22.a.g | 4 | 1.a | even | 1 | 1 | trivial | |
| 75.22.a.h | 4 | 15.d | odd | 2 | 1 | ||
| 75.22.b.h | 8 | 15.e | even | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{4} - 897T_{2}^{3} - 3210438T_{2}^{2} + 1891862624T_{2} + 2065963121664 \)
acting on \(S_{22}^{\mathrm{new}}(\Gamma_0(45))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} + \cdots + 2065963121664 \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( (T + 9765625)^{4} \)
|
| $7$ |
\( T^{4} + \cdots + 38\!\cdots\!00 \)
|
| $11$ |
\( T^{4} + \cdots + 28\!\cdots\!64 \)
|
| $13$ |
\( T^{4} + \cdots + 26\!\cdots\!84 \)
|
| $17$ |
\( T^{4} + \cdots + 31\!\cdots\!56 \)
|
| $19$ |
\( T^{4} + \cdots + 34\!\cdots\!00 \)
|
| $23$ |
\( T^{4} + \cdots - 97\!\cdots\!00 \)
|
| $29$ |
\( T^{4} + \cdots - 51\!\cdots\!00 \)
|
| $31$ |
\( T^{4} + \cdots + 15\!\cdots\!00 \)
|
| $37$ |
\( T^{4} + \cdots + 50\!\cdots\!00 \)
|
| $41$ |
\( T^{4} + \cdots - 70\!\cdots\!00 \)
|
| $43$ |
\( T^{4} + \cdots - 16\!\cdots\!04 \)
|
| $47$ |
\( T^{4} + \cdots - 21\!\cdots\!44 \)
|
| $53$ |
\( T^{4} + \cdots + 34\!\cdots\!00 \)
|
| $59$ |
\( T^{4} + \cdots + 97\!\cdots\!00 \)
|
| $61$ |
\( T^{4} + \cdots + 27\!\cdots\!76 \)
|
| $67$ |
\( T^{4} + \cdots + 28\!\cdots\!56 \)
|
| $71$ |
\( T^{4} + \cdots - 17\!\cdots\!44 \)
|
| $73$ |
\( T^{4} + \cdots - 99\!\cdots\!00 \)
|
| $79$ |
\( T^{4} + \cdots - 12\!\cdots\!00 \)
|
| $83$ |
\( T^{4} + \cdots - 79\!\cdots\!56 \)
|
| $89$ |
\( T^{4} + \cdots + 85\!\cdots\!00 \)
|
| $97$ |
\( T^{4} + \cdots - 16\!\cdots\!24 \)
|
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