gp:[N,k,chi] = [17787,2,Mod(1,17787)]
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("17787.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(17787, 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,-1,-1,0,3,1,1,0,-1,-5,0,-1,-1,7,-1,6,1,0,0,-4,3,-4,
5,1,0,9,1,2,-5,0,-7,0,-1,9,-6,-5,-3,7,0,-6,0,-1,4,-2,-1,0,4,7,5,3,-1,0,
0,6,-9,-2,1,-6,-2,0,7,5,0,8,-7,-4,0,6,3,10,-9,-4,-6,0,5,-14,1,1,-7,0,0,
-7,6,9,0,9,1,0,4,2,2,-6,-5,-17,0,0,4]
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
|
| \(3\) |
\( -1 \) |
| \(7\) |
\( -1 \) |
| \(11\) |
\( -1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.