gp:[N,k,chi] = [23670,2,Mod(1,23670)]
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("23670.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(23670, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 2, names="a")
Newform invariants
sage:traces = [1,1,0,1,1,0,1,1,0,1,-1,0,-4,1,0,1,-8,0,0,1,0,-1,4,0,1,-4,0,1,
4,0,9,1,0,-8,1,0,2,0,0,1,0,0,-8,-1,0,4,-3,0,-6,1,0,-4,-9,0,-1,1,0,4,8,
0,-11,9,0,1,-4,0,-8,-8,0,1,10,0,-3,2,0,0,-1,0,10,1,0,0,12,0,-8,-8,0,-1,
-1,0,-4,4,0,-3,0,0,2,-6,0,1]
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
|
| \(2\) |
\( -1 \) |
| \(3\) |
\( -1 \) |
| \(5\) |
\( -1 \) |
| \(263\) |
\( -1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.