Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [825,2,Mod(49,825)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(825, base_ring=CyclotomicField(10))
chi = DirichletCharacter(H, H._module([0, 5, 4]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("825.49");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 825 = 3 \cdot 5^{2} \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 825.bx (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: | \(6.58765816676\) |
| 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: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{10}]$ |
$q$-expansion
comment: q-expansion
sage: f.q_expansion() # note that sage often uses an isomorphic number field
gp: mfcoefs(f, 20)
Coefficients of the \(q\)-expansion are expressed in terms of a primitive root of unity \(\zeta_{20}\). We also show the integral \(q\)-expansion of the trace form.
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/825\mathbb{Z}\right)^\times\).
| \(n\) | \(376\) | \(551\) | \(727\) |
| \(\chi(n)\) | \(-\zeta_{20}^{6}\) | \(1\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 49.1 |
|
−1.53884 | + | 0.500000i | −0.587785 | + | 0.809017i | 0.500000 | − | 0.363271i | 0 | 0.500000 | − | 1.53884i | −3.07768 | − | 4.23607i | 1.31433 | − | 1.80902i | −0.309017 | − | 0.951057i | 0 | ||||||||||||||||||||||||||||
| 49.2 | 1.53884 | − | 0.500000i | 0.587785 | − | 0.809017i | 0.500000 | − | 0.363271i | 0 | 0.500000 | − | 1.53884i | 3.07768 | + | 4.23607i | −1.31433 | + | 1.80902i | −0.309017 | − | 0.951057i | 0 | |||||||||||||||||||||||||||||
| 124.1 | −0.363271 | − | 0.500000i | −0.951057 | + | 0.309017i | 0.500000 | − | 1.53884i | 0 | 0.500000 | + | 0.363271i | −0.726543 | − | 0.236068i | −2.12663 | + | 0.690983i | 0.809017 | − | 0.587785i | 0 | |||||||||||||||||||||||||||||
| 124.2 | 0.363271 | + | 0.500000i | 0.951057 | − | 0.309017i | 0.500000 | − | 1.53884i | 0 | 0.500000 | + | 0.363271i | 0.726543 | + | 0.236068i | 2.12663 | − | 0.690983i | 0.809017 | − | 0.587785i | 0 | |||||||||||||||||||||||||||||
| 499.1 | −0.363271 | + | 0.500000i | −0.951057 | − | 0.309017i | 0.500000 | + | 1.53884i | 0 | 0.500000 | − | 0.363271i | −0.726543 | + | 0.236068i | −2.12663 | − | 0.690983i | 0.809017 | + | 0.587785i | 0 | |||||||||||||||||||||||||||||
| 499.2 | 0.363271 | − | 0.500000i | 0.951057 | + | 0.309017i | 0.500000 | + | 1.53884i | 0 | 0.500000 | − | 0.363271i | 0.726543 | − | 0.236068i | 2.12663 | + | 0.690983i | 0.809017 | + | 0.587785i | 0 | |||||||||||||||||||||||||||||
| 724.1 | −1.53884 | − | 0.500000i | −0.587785 | − | 0.809017i | 0.500000 | + | 0.363271i | 0 | 0.500000 | + | 1.53884i | −3.07768 | + | 4.23607i | 1.31433 | + | 1.80902i | −0.309017 | + | 0.951057i | 0 | |||||||||||||||||||||||||||||
| 724.2 | 1.53884 | + | 0.500000i | 0.587785 | + | 0.809017i | 0.500000 | + | 0.363271i | 0 | 0.500000 | + | 1.53884i | 3.07768 | − | 4.23607i | −1.31433 | − | 1.80902i | −0.309017 | + | 0.951057i | 0 | |||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 5.b | even | 2 | 1 | inner |
| 11.c | even | 5 | 1 | inner |
| 55.j | even | 10 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 825.2.bx.c | 8 | |
| 5.b | even | 2 | 1 | inner | 825.2.bx.c | 8 | |
| 5.c | odd | 4 | 1 | 825.2.n.b | ✓ | 4 | |
| 5.c | odd | 4 | 1 | 825.2.n.d | yes | 4 | |
| 11.c | even | 5 | 1 | inner | 825.2.bx.c | 8 | |
| 55.j | even | 10 | 1 | inner | 825.2.bx.c | 8 | |
| 55.k | odd | 20 | 1 | 825.2.n.b | ✓ | 4 | |
| 55.k | odd | 20 | 1 | 825.2.n.d | yes | 4 | |
| 55.k | odd | 20 | 1 | 9075.2.a.z | 2 | ||
| 55.k | odd | 20 | 1 | 9075.2.a.by | 2 | ||
| 55.l | even | 20 | 1 | 9075.2.a.bc | 2 | ||
| 55.l | even | 20 | 1 | 9075.2.a.bt | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 825.2.n.b | ✓ | 4 | 5.c | odd | 4 | 1 | |
| 825.2.n.b | ✓ | 4 | 55.k | odd | 20 | 1 | |
| 825.2.n.d | yes | 4 | 5.c | odd | 4 | 1 | |
| 825.2.n.d | yes | 4 | 55.k | odd | 20 | 1 | |
| 825.2.bx.c | 8 | 1.a | even | 1 | 1 | trivial | |
| 825.2.bx.c | 8 | 5.b | even | 2 | 1 | inner | |
| 825.2.bx.c | 8 | 11.c | even | 5 | 1 | inner | |
| 825.2.bx.c | 8 | 55.j | even | 10 | 1 | inner | |
| 9075.2.a.z | 2 | 55.k | odd | 20 | 1 | ||
| 9075.2.a.bc | 2 | 55.l | even | 20 | 1 | ||
| 9075.2.a.bt | 2 | 55.l | even | 20 | 1 | ||
| 9075.2.a.by | 2 | 55.k | odd | 20 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(825, [\chi])\):
|
\( T_{2}^{8} - 4T_{2}^{6} + 6T_{2}^{4} + T_{2}^{2} + 1 \)
|
|
\( T_{13}^{8} - 16T_{13}^{6} + 96T_{13}^{4} + 64T_{13}^{2} + 256 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{8} - 4 T^{6} + \cdots + 1 \)
|
| $3$ |
\( T^{8} - T^{6} + T^{4} + \cdots + 1 \)
|
| $5$ |
\( T^{8} \)
|
| $7$ |
\( T^{8} + 16 T^{6} + \cdots + 256 \)
|
| $11$ |
\( (T^{4} - 4 T^{3} + \cdots + 121)^{2} \)
|
| $13$ |
\( T^{8} - 16 T^{6} + \cdots + 256 \)
|
| $17$ |
\( T^{8} - 4 T^{6} + \cdots + 256 \)
|
| $19$ |
\( (T^{4} - 5 T^{3} + \cdots + 625)^{2} \)
|
| $23$ |
\( (T^{4} + 27 T^{2} + 121)^{2} \)
|
| $29$ |
\( (T^{4} - 5 T^{3} + 40 T^{2} + \cdots + 25)^{2} \)
|
| $31$ |
\( (T^{4} + 7 T^{3} + \cdots + 2401)^{2} \)
|
| $37$ |
\( T^{8} - 89 T^{6} + \cdots + 14641 \)
|
| $41$ |
\( (T^{4} + 17 T^{3} + \cdots + 841)^{2} \)
|
| $43$ |
\( (T^{4} + 87 T^{2} + 361)^{2} \)
|
| $47$ |
\( T^{8} - 19 T^{6} + \cdots + 923521 \)
|
| $53$ |
\( T^{8} - 11 T^{6} + \cdots + 2825761 \)
|
| $59$ |
\( (T^{4} - 15 T^{3} + \cdots + 2025)^{2} \)
|
| $61$ |
\( (T^{4} + 7 T^{3} + \cdots + 2401)^{2} \)
|
| $67$ |
\( (T^{4} + 223 T^{2} + 11881)^{2} \)
|
| $71$ |
\( (T^{4} - 8 T^{3} + \cdots + 4096)^{2} \)
|
| $73$ |
\( T^{8} - 281 T^{6} + \cdots + 13845841 \)
|
| $79$ |
\( (T^{4} + 15 T^{3} + \cdots + 625)^{2} \)
|
| $83$ |
\( T^{8} - 76 T^{6} + \cdots + 3748096 \)
|
| $89$ |
\( (T^{2} + 15 T + 45)^{4} \)
|
| $97$ |
\( T^{8} + 71 T^{6} + \cdots + 707281 \)
|
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