gp: [N,k,chi] = [1344,4,Mod(1,1344)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
sage: from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1344, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0, 0]))
N = Newforms(chi, 4, names="a")
magma: //Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("1344.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
Newform invariants
sage: traces = [1,0,3,0,-2,0,7,0,9,0,-8]
f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(11)] == 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)
For each embedding ι m \iota_m ι m of the coefficient field, the values ι m ( a n ) \iota_m(a_n) ι m ( a n ) are shown below.
For more information on an embedded modular form you can click on its label.
gp: mfembed(f)
Refresh table
p p p
Sign
2 2 2
− 1 -1 − 1
3 3 3
− 1 -1 − 1
7 7 7
− 1 -1 − 1
This newform does not admit any (nontrivial ) inner twists .
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on S 4 n e w ( Γ 0 ( 1344 ) ) S_{4}^{\mathrm{new}}(\Gamma_0(1344)) S 4 n e w ( Γ 0 ( 1 3 4 4 ) ) :
T 5 + 2 T_{5} + 2 T 5 + 2
T5 + 2
T 11 + 8 T_{11} + 8 T 1 1 + 8
T11 + 8
p p p
F p ( T ) F_p(T) F p ( T )
2 2 2
T T T
T
3 3 3
T − 3 T - 3 T − 3
T - 3
5 5 5
T + 2 T + 2 T + 2
T + 2
7 7 7
T − 7 T - 7 T − 7
T - 7
11 11 1 1
T + 8 T + 8 T + 8
T + 8
13 13 1 3
T − 42 T - 42 T − 4 2
T - 42
17 17 1 7
T + 2 T + 2 T + 2
T + 2
19 19 1 9
T + 124 T + 124 T + 1 2 4
T + 124
23 23 2 3
T + 76 T + 76 T + 7 6
T + 76
29 29 2 9
T + 254 T + 254 T + 2 5 4
T + 254
31 31 3 1
T − 72 T - 72 T − 7 2
T - 72
37 37 3 7
T + 398 T + 398 T + 3 9 8
T + 398
41 41 4 1
T − 462 T - 462 T − 4 6 2
T - 462
43 43 4 3
T − 212 T - 212 T − 2 1 2
T - 212
47 47 4 7
T − 264 T - 264 T − 2 6 4
T - 264
53 53 5 3
T − 162 T - 162 T − 1 6 2
T - 162
59 59 5 9
T + 772 T + 772 T + 7 7 2
T + 772
61 61 6 1
T + 30 T + 30 T + 3 0
T + 30
67 67 6 7
T + 764 T + 764 T + 7 6 4
T + 764
71 71 7 1
T − 236 T - 236 T − 2 3 6
T - 236
73 73 7 3
T − 418 T - 418 T − 4 1 8
T - 418
79 79 7 9
T + 552 T + 552 T + 5 5 2
T + 552
83 83 8 3
T − 1036 T - 1036 T − 1 0 3 6
T - 1036
89 89 8 9
T − 30 T - 30 T − 3 0
T - 30
97 97 9 7
T + 1190 T + 1190 T + 1 1 9 0
T + 1190
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