gp:[N,k,chi] = [26862,2,Mod(1,26862)]
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("26862.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(26862, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 2, names="a")
Newform invariants
sage:traces = [1,-1,1,1,2,-1,4,-1,1,-2,0,1,-4,-4,2,1,-2,-1,-8,2,4,0,4,-1,-1,
4,1,4,6,-2,0,-1,0,2,8,1,1,8,-4,-2,-6,-4,-8,0,2,-4,-6,1,9,1,-2,-4,0,-1,
0,-4,-8,-6,6,2,-8,0,4,1,-8,0,-12,-2,4,-8,2,-1,-4,-1,-1,-8,0,4,2,2,1,6,
0,4,-4,8,6,0,4,-2,-16,4,0,6,-16,-1,2,-9,0,-1]
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
|
| \(2\) |
\( +1 \) |
| \(3\) |
\( -1 \) |
| \(11\) |
\( +1 \) |
| \(37\) |
\( -1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.