Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [15,22,Mod(1,15)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(15, 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("15.1");
S:= CuspForms(chi, 22);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 15 = 3 \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 22 \) |
| Character orbit: | \([\chi]\) | \(=\) | 15.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: | \(41.9216016431\) |
| Analytic rank: | \(0\) |
| Dimension: | \(1\) |
| Coefficient field: | \(\mathbb{Q}\) |
| Coefficient ring: | \(\mathbb{Z}\) |
| 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)
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 |
|
544.000 | 59049.0 | −1.80122e6 | −9.76562e6 | 3.21227e7 | 1.27770e9 | −2.12071e9 | 3.48678e9 | −5.31250e9 | |||||||||||||||||||||
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 | 15.22.a.a | ✓ | 1 |
| 3.b | odd | 2 | 1 | 45.22.a.a | 1 | ||
| 5.b | even | 2 | 1 | 75.22.a.b | 1 | ||
| 5.c | odd | 4 | 2 | 75.22.b.c | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 15.22.a.a | ✓ | 1 | 1.a | even | 1 | 1 | trivial |
| 45.22.a.a | 1 | 3.b | odd | 2 | 1 | ||
| 75.22.a.b | 1 | 5.b | even | 2 | 1 | ||
| 75.22.b.c | 2 | 5.c | odd | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2} - 544 \)
acting on \(S_{22}^{\mathrm{new}}(\Gamma_0(15))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T - 544 \)
|
| $3$ |
\( T - 59049 \)
|
| $5$ |
\( T + 9765625 \)
|
| $7$ |
\( T - 1277698380 \)
|
| $11$ |
\( T + 77585921744 \)
|
| $13$ |
\( T + 434110898702 \)
|
| $17$ |
\( T - 12848917115782 \)
|
| $19$ |
\( T + 28605256159796 \)
|
| $23$ |
\( T - 224022192208080 \)
|
| $29$ |
\( T + 51676030833142 \)
|
| $31$ |
\( T - 8921108838285000 \)
|
| $37$ |
\( T - 43\!\cdots\!90 \)
|
| $41$ |
\( T - 58\!\cdots\!70 \)
|
| $43$ |
\( T + 16\!\cdots\!76 \)
|
| $47$ |
\( T + 16\!\cdots\!92 \)
|
| $53$ |
\( T - 22\!\cdots\!70 \)
|
| $59$ |
\( T - 51\!\cdots\!16 \)
|
| $61$ |
\( T - 12\!\cdots\!98 \)
|
| $67$ |
\( T + 54\!\cdots\!88 \)
|
| $71$ |
\( T + 11\!\cdots\!68 \)
|
| $73$ |
\( T + 37\!\cdots\!50 \)
|
| $79$ |
\( T - 63\!\cdots\!60 \)
|
| $83$ |
\( T + 14\!\cdots\!28 \)
|
| $89$ |
\( T - 13\!\cdots\!14 \)
|
| $97$ |
\( T + 32\!\cdots\!18 \)
|
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