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: | \(\Q(\sqrt{-3}, \sqrt{79})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 79x^{2} + 6241 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 14) |
| 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
\( x^{4} + 79x^{2} + 6241 \)
:
| \(\beta_{1}\) | \(=\) |
\( 2\nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{2} ) / 79 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( 2\nu^{3} ) / 79 \)
|
| \(\nu\) | \(=\) |
\( ( \beta_1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( 79\beta_{2} \)
|
| \(\nu^{3}\) | \(=\) |
\( ( 79\beta_{3} ) / 2 \)
|
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 | −18.0528 | + | 31.2683i | 0 | −124.435 | − | 36.3731i | −64.0000 | 0 | 72.2111 | + | 125.073i | ||||||||||||||||||||
| 37.2 | 2.00000 | − | 3.46410i | 0 | −8.00000 | − | 13.8564i | 53.0528 | − | 91.8901i | 0 | 124.435 | − | 36.3731i | −64.0000 | 0 | −212.211 | − | 367.560i | |||||||||||||||||||||
| 109.1 | 2.00000 | + | 3.46410i | 0 | −8.00000 | + | 13.8564i | −18.0528 | − | 31.2683i | 0 | −124.435 | + | 36.3731i | −64.0000 | 0 | 72.2111 | − | 125.073i | |||||||||||||||||||||
| 109.2 | 2.00000 | + | 3.46410i | 0 | −8.00000 | + | 13.8564i | 53.0528 | + | 91.8901i | 0 | 124.435 | + | 36.3731i | −64.0000 | 0 | −212.211 | + | 367.560i | |||||||||||||||||||||
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.j | 4 | |
| 3.b | odd | 2 | 1 | 14.6.c.a | ✓ | 4 | |
| 7.c | even | 3 | 1 | inner | 126.6.g.j | 4 | |
| 7.c | even | 3 | 1 | 882.6.a.ba | 2 | ||
| 7.d | odd | 6 | 1 | 882.6.a.bi | 2 | ||
| 12.b | even | 2 | 1 | 112.6.i.d | 4 | ||
| 21.c | even | 2 | 1 | 98.6.c.e | 4 | ||
| 21.g | even | 6 | 1 | 98.6.a.g | 2 | ||
| 21.g | even | 6 | 1 | 98.6.c.e | 4 | ||
| 21.h | odd | 6 | 1 | 14.6.c.a | ✓ | 4 | |
| 21.h | odd | 6 | 1 | 98.6.a.h | 2 | ||
| 84.j | odd | 6 | 1 | 784.6.a.bb | 2 | ||
| 84.n | even | 6 | 1 | 112.6.i.d | 4 | ||
| 84.n | even | 6 | 1 | 784.6.a.s | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 14.6.c.a | ✓ | 4 | 3.b | odd | 2 | 1 | |
| 14.6.c.a | ✓ | 4 | 21.h | odd | 6 | 1 | |
| 98.6.a.g | 2 | 21.g | even | 6 | 1 | ||
| 98.6.a.h | 2 | 21.h | odd | 6 | 1 | ||
| 98.6.c.e | 4 | 21.c | even | 2 | 1 | ||
| 98.6.c.e | 4 | 21.g | even | 6 | 1 | ||
| 112.6.i.d | 4 | 12.b | even | 2 | 1 | ||
| 112.6.i.d | 4 | 84.n | even | 6 | 1 | ||
| 126.6.g.j | 4 | 1.a | even | 1 | 1 | trivial | |
| 126.6.g.j | 4 | 7.c | even | 3 | 1 | inner | |
| 784.6.a.s | 2 | 84.n | even | 6 | 1 | ||
| 784.6.a.bb | 2 | 84.j | odd | 6 | 1 | ||
| 882.6.a.ba | 2 | 7.c | even | 3 | 1 | ||
| 882.6.a.bi | 2 | 7.d | odd | 6 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{4} - 70T_{5}^{3} + 8731T_{5}^{2} + 268170T_{5} + 14676561 \)
acting on \(S_{6}^{\mathrm{new}}(126, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} - 4 T + 16)^{2} \)
|
| $3$ |
\( T^{4} \)
|
| $5$ |
\( T^{4} - 70 T^{3} + \cdots + 14676561 \)
|
| $7$ |
\( T^{4} - 28322 T^{2} + 282475249 \)
|
| $11$ |
\( T^{4} - 62 T^{3} + \cdots + 210917529 \)
|
| $13$ |
\( (T^{2} - 1820 T + 766164)^{2} \)
|
| $17$ |
\( T^{4} + \cdots + 318620736225 \)
|
| $19$ |
\( T^{4} + \cdots + 96141544489 \)
|
| $23$ |
\( T^{4} + \cdots + 6792210678969 \)
|
| $29$ |
\( (T^{2} - 2852 T - 15866028)^{2} \)
|
| $31$ |
\( T^{4} + \cdots + 691673325561 \)
|
| $37$ |
\( T^{4} + \cdots + 252667333533169 \)
|
| $41$ |
\( (T^{2} + 6132 T + 8842932)^{2} \)
|
| $43$ |
\( (T^{2} + 16040 T - 78380144)^{2} \)
|
| $47$ |
\( T^{4} + \cdots + 24\!\cdots\!25 \)
|
| $53$ |
\( T^{4} + \cdots + 85\!\cdots\!81 \)
|
| $59$ |
\( T^{4} + \cdots + 868886159765625 \)
|
| $61$ |
\( T^{4} + \cdots + 38\!\cdots\!25 \)
|
| $67$ |
\( T^{4} + \cdots + 65\!\cdots\!25 \)
|
| $71$ |
\( (T^{2} - 11056 T - 177793920)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 22\!\cdots\!81 \)
|
| $79$ |
\( T^{4} + \cdots + 62\!\cdots\!25 \)
|
| $83$ |
\( (T^{2} - 44632 T - 5608638000)^{2} \)
|
| $89$ |
\( T^{4} + \cdots + 36\!\cdots\!25 \)
|
| $97$ |
\( (T^{2} + 8316 T - 349929580)^{2} \)
|
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