Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [126,6,Mod(37,126)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(126, base_ring=CyclotomicField(6))
chi = DirichletCharacter(H, H._module([0, 2]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("126.37");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 126 = 2 \cdot 3^{2} \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 126.g (of order \(3\), degree \(2\), 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: | \(20.2083612964\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Relative dimension: | \(2\) over \(\Q(\zeta_{3})\) |
| Coefficient field: | \(\Q(\sqrt{-3}, \sqrt{697})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - x^{3} + 175x^{2} + 174x + 30276 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{3}]$ |
$q$-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 basis \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{4} - x^{3} + 175x^{2} + 174x + 30276 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( -\nu^{3} + 175\nu^{2} - 175\nu + 30276 ) / 30450 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( \nu^{3} + 349 ) / 175 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{3} + 174\beta_{2} + \beta _1 - 175 \)
|
| \(\nu^{3}\) | \(=\) |
\( 175\beta_{3} - 349 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/126\mathbb{Z}\right)^\times\).
| \(n\) | \(29\) | \(73\) |
| \(\chi(n)\) | \(1\) | \(-1 + \beta_{2}\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 37.1 |
|
2.00000 | − | 3.46410i | 0 | −8.00000 | − | 13.8564i | −31.2509 | + | 54.1282i | 0 | 92.4027 | − | 90.9327i | −64.0000 | 0 | 125.004 | + | 216.513i | ||||||||||||||||||||
| 37.2 | 2.00000 | − | 3.46410i | 0 | −8.00000 | − | 13.8564i | 34.7509 | − | 60.1904i | 0 | −92.4027 | − | 90.9327i | −64.0000 | 0 | −139.004 | − | 240.762i | |||||||||||||||||||||
| 109.1 | 2.00000 | + | 3.46410i | 0 | −8.00000 | + | 13.8564i | −31.2509 | − | 54.1282i | 0 | 92.4027 | + | 90.9327i | −64.0000 | 0 | 125.004 | − | 216.513i | |||||||||||||||||||||
| 109.2 | 2.00000 | + | 3.46410i | 0 | −8.00000 | + | 13.8564i | 34.7509 | + | 60.1904i | 0 | −92.4027 | + | 90.9327i | −64.0000 | 0 | −139.004 | + | 240.762i | |||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 7.c | even | 3 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 126.6.g.i | yes | 4 |
| 3.b | odd | 2 | 1 | 126.6.g.f | ✓ | 4 | |
| 7.c | even | 3 | 1 | inner | 126.6.g.i | yes | 4 |
| 7.c | even | 3 | 1 | 882.6.a.bd | 2 | ||
| 7.d | odd | 6 | 1 | 882.6.a.bf | 2 | ||
| 21.g | even | 6 | 1 | 882.6.a.bn | 2 | ||
| 21.h | odd | 6 | 1 | 126.6.g.f | ✓ | 4 | |
| 21.h | odd | 6 | 1 | 882.6.a.br | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 126.6.g.f | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 126.6.g.f | ✓ | 4 | 21.h | odd | 6 | 1 | |
| 126.6.g.i | yes | 4 | 1.a | even | 1 | 1 | trivial |
| 126.6.g.i | yes | 4 | 7.c | even | 3 | 1 | inner |
| 882.6.a.bd | 2 | 7.c | even | 3 | 1 | ||
| 882.6.a.bf | 2 | 7.d | odd | 6 | 1 | ||
| 882.6.a.bn | 2 | 21.g | even | 6 | 1 | ||
| 882.6.a.br | 2 | 21.h | odd | 6 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{4} - 7T_{5}^{3} + 4393T_{5}^{2} + 30408T_{5} + 18870336 \)
acting on \(S_{6}^{\mathrm{new}}(126, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} - 4 T + 16)^{2} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} - 7 T^{3} + \cdots + 18870336 \)
|
| $7$ |
\( T^{4} - 539 T^{2} + 282475249 \)
|
| $11$ |
\( T^{4} + 19 T^{3} + \cdots + 71368704 \)
|
| $13$ |
\( (T^{2} + 889 T + 105402)^{2} \)
|
| $17$ |
\( T^{4} + \cdots + 326433966336 \)
|
| $19$ |
\( T^{4} + \cdots + 1555712387524 \)
|
| $23$ |
\( T^{4} + \cdots + 38909450209536 \)
|
| $29$ |
\( (T^{2} + 2125 T - 34945200)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 207884520076401 \)
|
| $37$ |
\( T^{4} + \cdots + 463522556621476 \)
|
| $41$ |
\( (T^{2} + 19992 T + 95001984)^{2} \)
|
| $43$ |
\( (T^{2} - 5767 T - 379057292)^{2} \)
|
| $47$ |
\( T^{4} + \cdots + 59\!\cdots\!56 \)
|
| $53$ |
\( T^{4} + \cdots + 36\!\cdots\!04 \)
|
| $59$ |
\( T^{4} + \cdots + 28\!\cdots\!84 \)
|
| $61$ |
\( T^{4} + \cdots + 11\!\cdots\!64 \)
|
| $67$ |
\( T^{4} + \cdots + 83\!\cdots\!84 \)
|
| $71$ |
\( (T^{2} - 9184 T - 1135197504)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 38\!\cdots\!36 \)
|
| $79$ |
\( T^{4} + \cdots + 28\!\cdots\!89 \)
|
| $83$ |
\( (T^{2} - 27055 T - 3410160408)^{2} \)
|
| $89$ |
\( T^{4} + \cdots + 18\!\cdots\!36 \)
|
| $97$ |
\( (T^{2} - 105777 T + 1416397226)^{2} \)
|
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