gp:[N,k,chi] = [22491,2,Mod(1,22491)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(22491, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 2, names="a")
magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("22491.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
Newform invariants
sage:traces = [1,-1,0,-1,2,0,0,3,0,-2,6,0,-4,0,0,-1,-1,0,-5,-2,0,-6,-8,0,-1,
4,0,0,3,0,2,-5,0,1,0,0,4,5,0,6,-6,0,10,-6,0,8,0,0,0,1,0,4,-12,0,12,0,0,
-3,12,0,7,-2,0,7,-8,0,4,1,0,0,-10,0,-6,-4,0,5,0,0,9,-2,0,6,-8,0,-2,-10,
0,18,-1,0,0,8,0,0,-10,0,1,0,0,1]
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
|
\(3\) |
\( -1 \) |
\(7\) |
\( -1 \) |
\(17\) |
\( +1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.