Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [3844,1,Mod(531,3844)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(3844, base_ring=CyclotomicField(10))
chi = DirichletCharacter(H, H._module([5, 6]))
N = Newforms(chi, 1, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("3844.531");
S:= CuspForms(chi, 1);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 3844 = 2^{2} \cdot 31^{2} \) |
| Weight: | \( k \) | \(=\) | \( 1 \) |
| Character orbit: | \([\chi]\) | \(=\) | 3844.l (of order \(10\), degree \(4\), not minimal) |
Newform invariants
comment: select newform
sage: f = N[0] # Warning: the index may be different
gp: f = lf[1] \\ Warning: the index may be different
| Self dual: | no |
| Analytic conductor: | \(1.91840590856\) |
| Analytic rank: | \(0\) |
| Dimension: | \(8\) |
| Relative dimension: | \(2\) over \(\Q(\zeta_{10})\) |
| Coefficient field: | \(\Q(\zeta_{20})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{8} - x^{6} + x^{4} - x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 124) |
| Projective image: | \(A_{4}\) |
| Projective field: | Galois closure of 4.0.15376.1 |
$q$-expansion
comment: q-expansion
sage: f.q_expansion() # note that sage often uses an isomorphic number field
gp: mfcoefs(f, 20)
The \(q\)-expansion and trace form are shown below.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/3844\mathbb{Z}\right)^\times\).
| \(n\) | \(1923\) | \(1925\) |
| \(\chi(n)\) | \(-1\) | \(-\zeta_{20}^{6}\) |
Embeddings
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.
comment: embeddings in the coefficient field
gp: mfembed(f)
| Label | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 531.1 |
|
−0.951057 | + | 0.309017i | 0.951057 | + | 0.309017i | 0.809017 | − | 0.587785i | 1.00000 | −1.00000 | −0.587785 | − | 0.809017i | −0.587785 | + | 0.809017i | 0 | −0.951057 | + | 0.309017i | ||||||||||||||||||||||||||||||
| 531.2 | 0.951057 | − | 0.309017i | −0.951057 | − | 0.309017i | 0.809017 | − | 0.587785i | 1.00000 | −1.00000 | 0.587785 | + | 0.809017i | 0.587785 | − | 0.809017i | 0 | 0.951057 | − | 0.309017i | |||||||||||||||||||||||||||||||
| 1335.1 | −0.587785 | + | 0.809017i | 0.587785 | + | 0.809017i | −0.309017 | − | 0.951057i | 1.00000 | −1.00000 | 0.951057 | − | 0.309017i | 0.951057 | + | 0.309017i | 0 | −0.587785 | + | 0.809017i | |||||||||||||||||||||||||||||||
| 1335.2 | 0.587785 | − | 0.809017i | −0.587785 | − | 0.809017i | −0.309017 | − | 0.951057i | 1.00000 | −1.00000 | −0.951057 | + | 0.309017i | −0.951057 | − | 0.309017i | 0 | 0.587785 | − | 0.809017i | |||||||||||||||||||||||||||||||
| 3271.1 | −0.587785 | − | 0.809017i | 0.587785 | − | 0.809017i | −0.309017 | + | 0.951057i | 1.00000 | −1.00000 | 0.951057 | + | 0.309017i | 0.951057 | − | 0.309017i | 0 | −0.587785 | − | 0.809017i | |||||||||||||||||||||||||||||||
| 3271.2 | 0.587785 | + | 0.809017i | −0.587785 | + | 0.809017i | −0.309017 | + | 0.951057i | 1.00000 | −1.00000 | −0.951057 | − | 0.309017i | −0.951057 | + | 0.309017i | 0 | 0.587785 | + | 0.809017i | |||||||||||||||||||||||||||||||
| 3511.1 | −0.951057 | − | 0.309017i | 0.951057 | − | 0.309017i | 0.809017 | + | 0.587785i | 1.00000 | −1.00000 | −0.587785 | + | 0.809017i | −0.587785 | − | 0.809017i | 0 | −0.951057 | − | 0.309017i | |||||||||||||||||||||||||||||||
| 3511.2 | 0.951057 | + | 0.309017i | −0.951057 | + | 0.309017i | 0.809017 | + | 0.587785i | 1.00000 | −1.00000 | 0.587785 | − | 0.809017i | 0.587785 | + | 0.809017i | 0 | 0.951057 | + | 0.309017i | |||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 4.b | odd | 2 | 1 | inner |
| 31.d | even | 5 | 3 | inner |
| 124.l | odd | 10 | 3 | inner |
Twists
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{1}^{\mathrm{new}}(3844, [\chi])\):
|
\( T_{3}^{8} - T_{3}^{6} + T_{3}^{4} - T_{3}^{2} + 1 \)
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\( T_{5} - 1 \)
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\( T_{13}^{4} + T_{13}^{3} + T_{13}^{2} + T_{13} + 1 \)
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Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $3$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $5$ |
\( (T - 1)^{8} \)
|
| $7$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
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| $11$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $13$ |
\( (T^{4} + T^{3} + T^{2} + \cdots + 1)^{2} \)
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| $17$ |
\( (T^{4} - T^{3} + T^{2} + \cdots + 1)^{2} \)
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| $19$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
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| $23$ |
\( T^{8} \)
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| $29$ |
\( T^{8} \)
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| $31$ |
\( T^{8} \)
|
| $37$ |
\( (T + 1)^{8} \)
|
| $41$ |
\( (T^{4} + T^{3} + T^{2} + \cdots + 1)^{2} \)
|
| $43$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $47$ |
\( T^{8} \)
|
| $53$ |
\( (T^{4} + T^{3} + T^{2} + \cdots + 1)^{2} \)
|
| $59$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $61$ |
\( T^{8} \)
|
| $67$ |
\( (T^{2} + 1)^{4} \)
|
| $71$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $73$ |
\( (T^{4} - T^{3} + T^{2} + \cdots + 1)^{2} \)
|
| $79$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $83$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $89$ |
\( T^{8} \)
|
| $97$ |
\( T^{8} \)
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