gp:[N,k,chi] = [41600,2,Mod(1,41600)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("41600.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(41600, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0, 0]))
N = Newforms(chi, 2, names="a")
Newform invariants
sage:traces = [1,0,-2,0,0,0,3,0,1,0,5,0,1,0,0,0,-3,0,0,0,-6,0,6,0,0,0,4,0,-7,
0,-7,0,-10,0,0,0,-4,0,-2,0,-6,0,8,0,0,0,9,0,2,0,6,0,1,0,0,0,0,0,3,0,3,
0,3,0,0,0,-13,0,-12,0,-8,0,16,0,0,0,15,0,16,0,-11,0,-13,0,0,0,14,0,-4,
0,3,0,14,0,0,0,-18,0,5,0]
f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(None)] == traces)
gp:f = lf[1] \\ Warning: the index may be different
sage:f.q_expansion() # note that sage often uses an isomorphic number field
gp:mfcoefs(f, 20)
| \( p \) |
Sign
|
| \(2\) |
\( -1 \) |
| \(5\) |
\( +1 \) |
| \(13\) |
\( -1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.