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gp:[N,k,chi] = [168,8,Mod(1,168)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
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sage:from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(168, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0, 0]))
N = Newforms(chi, 8, names="a")
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magma://Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("168.1");
S:= CuspForms(chi, 8);
N := Newforms(S);
Newform invariants
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sage:traces = [2,0,-54,0,-52]
f = next(g for g in N if [g.coefficient(i+1).trace() for i in range(5)] == 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)
Coefficients of the \(q\)-expansion are expressed in terms of \(\beta = 24\sqrt{211}\).
We also show the integral \(q\)-expansion of the trace form.
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.
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gp:mfembed(f)
| \( p \) |
Sign
|
| \(2\) |
\( +1 \) |
| \(3\) |
\( +1 \) |
| \(7\) |
\( -1 \) |
This newform does not admit any (nontrivial) inner twists.
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{2} + 52T_{5} - 120860 \)
acting on \(S_{8}^{\mathrm{new}}(\Gamma_0(168))\).
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| $p$ |
$F_p(T)$ |
| $2$ |
\( T^{2} \)
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|
| $3$ |
\( (T + 27)^{2} \)
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|
| $5$ |
\( T^{2} + 52T - 120860 \)
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|
| $7$ |
\( (T - 343)^{2} \)
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|
| $11$ |
\( T^{2} + 4056 T + 1074384 \)
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|
| $13$ |
\( T^{2} + 6468 T - 38155644 \)
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|
| $17$ |
\( T^{2} - 7780 T - 230978300 \)
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|
| $19$ |
\( T^{2} - 15464 T - 22374512 \)
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|
| $23$ |
\( T^{2} + \cdots + 2393261440 \)
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|
| $29$ |
\( T^{2} + \cdots - 9367459292 \)
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|
| $31$ |
\( T^{2} + \cdots - 8377080320 \)
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|
| $37$ |
\( T^{2} + \cdots + 2675912580 \)
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|
| $41$ |
\( T^{2} + \cdots + 2447733220 \)
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|
| $43$ |
\( T^{2} + \cdots + 93153917200 \)
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|
| $47$ |
\( T^{2} + \cdots + 159574591744 \)
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|
| $53$ |
\( T^{2} + \cdots + 340404611332 \)
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|
| $59$ |
\( T^{2} + \cdots - 678842463600 \)
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|
| $61$ |
\( T^{2} + \cdots + 2649767265028 \)
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|
| $67$ |
\( T^{2} + \cdots - 1137117299184 \)
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|
| $71$ |
\( T^{2} + \cdots - 2277258731136 \)
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|
| $73$ |
\( T^{2} + \cdots - 8409288180572 \)
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|
| $79$ |
\( T^{2} + \cdots + 246065890816 \)
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|
| $83$ |
\( T^{2} + \cdots + 20649853460880 \)
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|
| $89$ |
\( T^{2} + \cdots - 39523841602844 \)
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|
| $97$ |
\( T^{2} + \cdots + 3581899117636 \)
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