sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(2380, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 0, 4, 3]))
N = Newforms(chi, 2, names="a")
magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("2380.781");
S:= CuspForms(chi, 2);
N := Newforms(S);
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{92} - 97 T_{3}^{90} + 5059 T_{3}^{88} - 182382 T_{3}^{86} + 5034613 T_{3}^{84} - 112289343 T_{3}^{82} + \cdots + 43046721 \)
acting on \(S_{2}^{\mathrm{new}}(2380, [\chi])\).