Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [816,2,Mod(65,816)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(816, base_ring=CyclotomicField(16))
chi = DirichletCharacter(H, H._module([0, 0, 8, 9]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("816.65");
S:= CuspForms(chi, 2);
N := Newforms(S);
Level: | \( N \) | \(=\) | \( 816 = 2^{4} \cdot 3 \cdot 17 \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 816.cj (of order \(16\), degree \(8\), not 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: | \(6.51579280494\) |
Analytic rank: | \(0\) |
Dimension: | \(72\) |
Relative dimension: | \(9\) over \(\Q(\zeta_{16})\) |
Twist minimal: | no (minimal twist has level 408) |
Sato-Tate group: | $\mathrm{SU}(2)[C_{16}]$ |
$q$-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 | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
65.1 | 0 | −1.70679 | − | 0.294712i | 0 | 1.03780 | + | 1.55318i | 0 | −1.66829 | − | 1.11471i | 0 | 2.82629 | + | 1.00602i | 0 | ||||||||||
65.2 | 0 | −1.55059 | + | 0.771806i | 0 | −1.28076 | − | 1.91679i | 0 | 0.176284 | + | 0.117789i | 0 | 1.80863 | − | 2.39350i | 0 | ||||||||||
65.3 | 0 | −1.21751 | − | 1.23194i | 0 | −0.254485 | − | 0.380864i | 0 | 1.87193 | + | 1.25078i | 0 | −0.0353621 | + | 2.99979i | 0 | ||||||||||
65.4 | 0 | 0.0580152 | + | 1.73108i | 0 | 1.04136 | + | 1.55850i | 0 | 2.88539 | + | 1.92796i | 0 | −2.99327 | + | 0.200858i | 0 | ||||||||||
65.5 | 0 | 0.197491 | − | 1.72075i | 0 | 1.60395 | + | 2.40048i | 0 | −2.36431 | − | 1.57978i | 0 | −2.92199 | − | 0.679668i | 0 | ||||||||||
65.6 | 0 | 0.430496 | + | 1.67770i | 0 | 0.503287 | + | 0.753222i | 0 | −4.13347 | − | 2.76189i | 0 | −2.62935 | + | 1.44449i | 0 | ||||||||||
65.7 | 0 | 1.33848 | + | 1.09930i | 0 | −1.81973 | − | 2.72341i | 0 | 1.68007 | + | 1.12259i | 0 | 0.583074 | + | 2.94279i | 0 | ||||||||||
65.8 | 0 | 1.47754 | − | 0.903815i | 0 | −1.04129 | − | 1.55841i | 0 | −1.50251 | − | 1.00395i | 0 | 1.36624 | − | 2.67084i | 0 | ||||||||||
65.9 | 0 | 1.67997 | − | 0.421554i | 0 | 2.05763 | + | 3.07946i | 0 | 3.05491 | + | 2.04122i | 0 | 2.64458 | − | 1.41640i | 0 | ||||||||||
113.1 | 0 | −1.70679 | + | 0.294712i | 0 | 1.03780 | − | 1.55318i | 0 | −1.66829 | + | 1.11471i | 0 | 2.82629 | − | 1.00602i | 0 | ||||||||||
113.2 | 0 | −1.55059 | − | 0.771806i | 0 | −1.28076 | + | 1.91679i | 0 | 0.176284 | − | 0.117789i | 0 | 1.80863 | + | 2.39350i | 0 | ||||||||||
113.3 | 0 | −1.21751 | + | 1.23194i | 0 | −0.254485 | + | 0.380864i | 0 | 1.87193 | − | 1.25078i | 0 | −0.0353621 | − | 2.99979i | 0 | ||||||||||
113.4 | 0 | 0.0580152 | − | 1.73108i | 0 | 1.04136 | − | 1.55850i | 0 | 2.88539 | − | 1.92796i | 0 | −2.99327 | − | 0.200858i | 0 | ||||||||||
113.5 | 0 | 0.197491 | + | 1.72075i | 0 | 1.60395 | − | 2.40048i | 0 | −2.36431 | + | 1.57978i | 0 | −2.92199 | + | 0.679668i | 0 | ||||||||||
113.6 | 0 | 0.430496 | − | 1.67770i | 0 | 0.503287 | − | 0.753222i | 0 | −4.13347 | + | 2.76189i | 0 | −2.62935 | − | 1.44449i | 0 | ||||||||||
113.7 | 0 | 1.33848 | − | 1.09930i | 0 | −1.81973 | + | 2.72341i | 0 | 1.68007 | − | 1.12259i | 0 | 0.583074 | − | 2.94279i | 0 | ||||||||||
113.8 | 0 | 1.47754 | + | 0.903815i | 0 | −1.04129 | + | 1.55841i | 0 | −1.50251 | + | 1.00395i | 0 | 1.36624 | + | 2.67084i | 0 | ||||||||||
113.9 | 0 | 1.67997 | + | 0.421554i | 0 | 2.05763 | − | 3.07946i | 0 | 3.05491 | − | 2.04122i | 0 | 2.64458 | + | 1.41640i | 0 | ||||||||||
209.1 | 0 | −1.71825 | − | 0.218217i | 0 | 3.19088 | + | 0.634705i | 0 | 0.130307 | + | 0.655095i | 0 | 2.90476 | + | 0.749904i | 0 | ||||||||||
209.2 | 0 | −1.42432 | − | 0.985552i | 0 | −3.81385 | − | 0.758621i | 0 | −0.838845 | − | 4.21716i | 0 | 1.05737 | + | 2.80748i | 0 | ||||||||||
See all 72 embeddings |
Inner twists
Char | Parity | Ord | Mult | Type |
---|---|---|---|---|
1.a | even | 1 | 1 | trivial |
51.i | even | 16 | 1 | inner |
Twists
By twisting character orbit | |||||||
---|---|---|---|---|---|---|---|
Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
1.a | even | 1 | 1 | trivial | 816.2.cj.f | 72 | |
3.b | odd | 2 | 1 | 816.2.cj.e | 72 | ||
4.b | odd | 2 | 1 | 408.2.bh.a | ✓ | 72 | |
12.b | even | 2 | 1 | 408.2.bh.b | yes | 72 | |
17.e | odd | 16 | 1 | 816.2.cj.e | 72 | ||
51.i | even | 16 | 1 | inner | 816.2.cj.f | 72 | |
68.i | even | 16 | 1 | 408.2.bh.b | yes | 72 | |
204.t | odd | 16 | 1 | 408.2.bh.a | ✓ | 72 |
By twisted newform orbit | |||||||
---|---|---|---|---|---|---|---|
Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
408.2.bh.a | ✓ | 72 | 4.b | odd | 2 | 1 | |
408.2.bh.a | ✓ | 72 | 204.t | odd | 16 | 1 | |
408.2.bh.b | yes | 72 | 12.b | even | 2 | 1 | |
408.2.bh.b | yes | 72 | 68.i | even | 16 | 1 | |
816.2.cj.e | 72 | 3.b | odd | 2 | 1 | ||
816.2.cj.e | 72 | 17.e | odd | 16 | 1 | ||
816.2.cj.f | 72 | 1.a | even | 1 | 1 | trivial | |
816.2.cj.f | 72 | 51.i | even | 16 | 1 | inner |
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator \( T_{5}^{72} - 8 T_{5}^{70} - 16 T_{5}^{69} - 60 T_{5}^{68} + 1088 T_{5}^{67} + 2304 T_{5}^{66} + \cdots + 616397059162112 \) acting on \(S_{2}^{\mathrm{new}}(816, [\chi])\).