Properties

Label 816.2.cj.f
Level $816$
Weight $2$
Character orbit 816.cj
Analytic conductor $6.516$
Analytic rank $0$
Dimension $72$
CM no
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

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.

\(\operatorname{Tr}(f)(q) = \) \( 72 q+O(q^{10}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q) = \) \( 72 q + 16 q^{11} + 24 q^{15} + 16 q^{17} + 24 q^{21} + 16 q^{25} - 16 q^{29} - 16 q^{31} - 16 q^{33} + 16 q^{37} + 32 q^{41} - 24 q^{43} + 48 q^{45} + 16 q^{47} + 32 q^{51} - 64 q^{53} - 40 q^{57} - 64 q^{59} + 24 q^{63} - 48 q^{69} + 32 q^{71} + 128 q^{75} + 16 q^{77} + 24 q^{81} - 72 q^{83} - 16 q^{85} - 32 q^{87} - 48 q^{89} + 32 q^{91} - 96 q^{93} + 32 q^{95} - 16 q^{97} + 40 q^{99}+O(q^{100}) \) Copy content Toggle raw display

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
\(n\): e.g. 2-40 or 990-1000
Embeddings: e.g. 1-3 or 65.9
Significant digits:
Format:

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 \(S_{2}^{\mathrm{new}}(816, [\chi])\). Copy content Toggle raw display