[N,k,chi] = [4031,2,Mod(1,4031)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(4031, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("4031.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
Newform invariants
sage: f = N[0] # Warning: the index may be different
gp: f = lf[1] \\ Warning: the index may be different
The dimension is sufficiently large that we do not compute an algebraic \(q\)-expansion, but we have computed the trace expansion.
For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.
For more information on an embedded modular form you can click on its label.
\( p \) |
Sign
|
\(29\) |
\(-1\) |
\(139\) |
\(-1\) |
This newform does not admit any (nontrivial) inner twists.
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{59} + 5 T_{2}^{58} - 67 T_{2}^{57} - 366 T_{2}^{56} + 2065 T_{2}^{55} + 12599 T_{2}^{54} - 38552 T_{2}^{53} - 271237 T_{2}^{52} + 480449 T_{2}^{51} + 4096812 T_{2}^{50} - 4095853 T_{2}^{49} - 46165271 T_{2}^{48} + \cdots + 83 \)
acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(4031))\).