Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [891,2,Mod(890,891)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(891, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 1]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("891.890");
S:= CuspForms(chi, 2);
N := Newforms(S);
Level: | \( N \) | \(=\) | \( 891 = 3^{4} \cdot 11 \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 891.d (of order \(2\), degree \(1\), minimal) |
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: | no |
Analytic conductor: | \(7.11467082010\) |
Analytic rank: | \(0\) |
Dimension: | \(24\) |
Twist minimal: | yes |
Sato-Tate group: | $\mathrm{SU}(2)[C_{2}]$ |
$q$-expansion
The dimension is sufficiently large that we do not compute an algebraic \(q\)-expansion, but we have computed the trace expansion.
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 | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
890.1 | −2.72623 | 0 | 5.43234 | − | 3.56048i | 0 | − | 1.74007i | −9.35736 | 0 | 9.70671i | ||||||||||||||||
890.2 | −2.72623 | 0 | 5.43234 | 3.56048i | 0 | 1.74007i | −9.35736 | 0 | − | 9.70671i | |||||||||||||||||
890.3 | −2.29736 | 0 | 3.27787 | − | 1.02695i | 0 | 2.98168i | −2.93572 | 0 | 2.35926i | |||||||||||||||||
890.4 | −2.29736 | 0 | 3.27787 | 1.02695i | 0 | − | 2.98168i | −2.93572 | 0 | − | 2.35926i | ||||||||||||||||
890.5 | −1.78114 | 0 | 1.17248 | − | 2.30190i | 0 | 1.42536i | 1.47394 | 0 | 4.10001i | |||||||||||||||||
890.6 | −1.78114 | 0 | 1.17248 | 2.30190i | 0 | − | 1.42536i | 1.47394 | 0 | − | 4.10001i | ||||||||||||||||
890.7 | −1.28235 | 0 | −0.355579 | − | 2.71071i | 0 | 0.132015i | 3.02068 | 0 | 3.47607i | |||||||||||||||||
890.8 | −1.28235 | 0 | −0.355579 | 2.71071i | 0 | − | 0.132015i | 3.02068 | 0 | − | 3.47607i | ||||||||||||||||
890.9 | −0.587929 | 0 | −1.65434 | − | 3.09798i | 0 | − | 4.55548i | 2.14849 | 0 | 1.82139i | ||||||||||||||||
890.10 | −0.587929 | 0 | −1.65434 | 3.09798i | 0 | 4.55548i | 2.14849 | 0 | − | 1.82139i | |||||||||||||||||
890.11 | −0.356696 | 0 | −1.87277 | − | 0.155629i | 0 | − | 2.69819i | 1.38140 | 0 | 0.0555122i | ||||||||||||||||
890.12 | −0.356696 | 0 | −1.87277 | 0.155629i | 0 | 2.69819i | 1.38140 | 0 | − | 0.0555122i | |||||||||||||||||
890.13 | 0.356696 | 0 | −1.87277 | − | 0.155629i | 0 | 2.69819i | −1.38140 | 0 | − | 0.0555122i | ||||||||||||||||
890.14 | 0.356696 | 0 | −1.87277 | 0.155629i | 0 | − | 2.69819i | −1.38140 | 0 | 0.0555122i | |||||||||||||||||
890.15 | 0.587929 | 0 | −1.65434 | − | 3.09798i | 0 | 4.55548i | −2.14849 | 0 | − | 1.82139i | ||||||||||||||||
890.16 | 0.587929 | 0 | −1.65434 | 3.09798i | 0 | − | 4.55548i | −2.14849 | 0 | 1.82139i | |||||||||||||||||
890.17 | 1.28235 | 0 | −0.355579 | − | 2.71071i | 0 | − | 0.132015i | −3.02068 | 0 | − | 3.47607i | |||||||||||||||
890.18 | 1.28235 | 0 | −0.355579 | 2.71071i | 0 | 0.132015i | −3.02068 | 0 | 3.47607i | ||||||||||||||||||
890.19 | 1.78114 | 0 | 1.17248 | − | 2.30190i | 0 | − | 1.42536i | −1.47394 | 0 | − | 4.10001i | |||||||||||||||
890.20 | 1.78114 | 0 | 1.17248 | 2.30190i | 0 | 1.42536i | −1.47394 | 0 | 4.10001i | ||||||||||||||||||
See all 24 embeddings |
Inner twists
Char | Parity | Ord | Mult | Type |
---|---|---|---|---|
1.a | even | 1 | 1 | trivial |
3.b | odd | 2 | 1 | inner |
11.b | odd | 2 | 1 | inner |
33.d | even | 2 | 1 | inner |
Twists
By twisting character orbit | |||||||
---|---|---|---|---|---|---|---|
Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
1.a | even | 1 | 1 | trivial | 891.2.d.c | ✓ | 24 |
3.b | odd | 2 | 1 | inner | 891.2.d.c | ✓ | 24 |
9.c | even | 3 | 2 | 891.2.g.f | 48 | ||
9.d | odd | 6 | 2 | 891.2.g.f | 48 | ||
11.b | odd | 2 | 1 | inner | 891.2.d.c | ✓ | 24 |
33.d | even | 2 | 1 | inner | 891.2.d.c | ✓ | 24 |
99.g | even | 6 | 2 | 891.2.g.f | 48 | ||
99.h | odd | 6 | 2 | 891.2.g.f | 48 |
By twisted newform orbit | |||||||
---|---|---|---|---|---|---|---|
Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
891.2.d.c | ✓ | 24 | 1.a | even | 1 | 1 | trivial |
891.2.d.c | ✓ | 24 | 3.b | odd | 2 | 1 | inner |
891.2.d.c | ✓ | 24 | 11.b | odd | 2 | 1 | inner |
891.2.d.c | ✓ | 24 | 33.d | even | 2 | 1 | inner |
891.2.g.f | 48 | 9.c | even | 3 | 2 | ||
891.2.g.f | 48 | 9.d | odd | 6 | 2 | ||
891.2.g.f | 48 | 99.g | even | 6 | 2 | ||
891.2.g.f | 48 | 99.h | odd | 6 | 2 |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator \( T_{2}^{12} - 18T_{2}^{10} + 114T_{2}^{8} - 306T_{2}^{6} + 330T_{2}^{4} - 108T_{2}^{2} + 9 \) acting on \(S_{2}^{\mathrm{new}}(891, [\chi])\).