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gp:[N,k,chi] = [27378,2,Mod(1,27378)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
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magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("27378.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
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sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(27378, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 2, names="a")
Newform invariants
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sage:traces = [1,-1,0,1,2,0,2,-1,0,-2,-1,0,0,-2,0,1,1,0,5,2,0,1,0,0,-1,0,0,
2,0,0,-2,-1,0,-1,4,0,8,-5,0,-2,5,0,-11,-1,0,0,8,0,-3,1,0,0,-2,0,-2,-2,
0,0,-11,0,-14,2,0,1,0,0,-5,1,0,-4,-2,0,-5,-8,0,5,-2,0,-10,2,0,-5,-12,0,
2,11,0,1,14,0,0,0,0,-8,10,0,-19,3,0,-1]
f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(None)] == traces)
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gp:f = lf[1] \\ Warning: the index may be different
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sage:f.q_expansion() # note that sage often uses an isomorphic number field
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gp:mfcoefs(f, 20)
| \( p \) |
Sign
|
| \(2\) |
\( +1 \) |
| \(3\) |
\( +1 \) |
| \(13\) |
\( +1 \) |
Inner twists of this newform have not been computed.
Twists of this newform have not been computed.
