Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [70,8,Mod(29,70)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(70, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([1, 0]))
N = Newforms(chi, 8, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("70.29");
S:= CuspForms(chi, 8);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 70 = 2 \cdot 5 \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 8 \) |
| Character orbit: | \([\chi]\) | \(=\) | 70.c (of order \(2\), degree \(1\), 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: | \(21.8669517839\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{214})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 11449 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | yes |
| Sato-Tate group: | $\mathrm{SU}(2)[C_{2}]$ |
$q$-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
\( x^{4} + 11449 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{2} ) / 107 \)
|
| \(\beta_{3}\) | \(=\) |
\( ( \nu^{3} ) / 107 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( 107\beta_{2} \)
|
| \(\nu^{3}\) | \(=\) |
\( 107\beta_{3} \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/70\mathbb{Z}\right)^\times\).
| \(n\) | \(31\) | \(57\) |
| \(\chi(n)\) | \(1\) | \(-1\) |
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 29.1 |
|
− | 8.00000i | 25.3713i | −64.0000 | 107.859 | + | 257.859i | 202.970 | − | 343.000i | 512.000i | 1543.30 | 2062.87 | − | 862.874i | ||||||||||||||||||||||||
| 29.2 | − | 8.00000i | 54.6287i | −64.0000 | −257.859 | − | 107.859i | 437.030 | − | 343.000i | 512.000i | −797.299 | −862.874 | + | 2062.87i | |||||||||||||||||||||||||
| 29.3 | 8.00000i | − | 54.6287i | −64.0000 | −257.859 | + | 107.859i | 437.030 | 343.000i | − | 512.000i | −797.299 | −862.874 | − | 2062.87i | |||||||||||||||||||||||||
| 29.4 | 8.00000i | − | 25.3713i | −64.0000 | 107.859 | − | 257.859i | 202.970 | 343.000i | − | 512.000i | 1543.30 | 2062.87 | + | 862.874i | |||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 5.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 70.8.c.c | ✓ | 4 |
| 5.b | even | 2 | 1 | inner | 70.8.c.c | ✓ | 4 |
| 5.c | odd | 4 | 1 | 350.8.a.i | 2 | ||
| 5.c | odd | 4 | 1 | 350.8.a.q | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 70.8.c.c | ✓ | 4 | 1.a | even | 1 | 1 | trivial |
| 70.8.c.c | ✓ | 4 | 5.b | even | 2 | 1 | inner |
| 350.8.a.i | 2 | 5.c | odd | 4 | 1 | ||
| 350.8.a.q | 2 | 5.c | odd | 4 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{4} + 3628T_{3}^{2} + 1920996 \)
acting on \(S_{8}^{\mathrm{new}}(70, [\chi])\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} + 64)^{2} \)
|
| $3$ |
\( T^{4} + 3628 T^{2} + 1920996 \)
|
| $5$ |
\( T^{4} + \cdots + 6103515625 \)
|
| $7$ |
\( (T^{2} + 117649)^{2} \)
|
| $11$ |
\( (T^{2} + 6640 T + 10775016)^{2} \)
|
| $13$ |
\( T^{4} + \cdots + 6750757561284 \)
|
| $17$ |
\( T^{4} + \cdots + 10\!\cdots\!56 \)
|
| $19$ |
\( (T^{2} - 5288 T - 2839339590)^{2} \)
|
| $23$ |
\( T^{4} + \cdots + 39\!\cdots\!00 \)
|
| $29$ |
\( (T^{2} - 308684 T + 21190957260)^{2} \)
|
| $31$ |
\( (T^{2} + 153592 T - 17453822408)^{2} \)
|
| $37$ |
\( T^{4} + \cdots + 92\!\cdots\!36 \)
|
| $41$ |
\( (T^{2} - 163988 T - 34303291188)^{2} \)
|
| $43$ |
\( T^{4} + \cdots + 46\!\cdots\!04 \)
|
| $47$ |
\( T^{4} + \cdots + 32\!\cdots\!04 \)
|
| $53$ |
\( T^{4} + \cdots + 49\!\cdots\!84 \)
|
| $59$ |
\( (T^{2} + \cdots + 4730762520730)^{2} \)
|
| $61$ |
\( (T^{2} + \cdots - 3037893938130)^{2} \)
|
| $67$ |
\( T^{4} + \cdots + 72\!\cdots\!16 \)
|
| $71$ |
\( (T^{2} + \cdots + 3821540447052)^{2} \)
|
| $73$ |
\( T^{4} + \cdots + 59\!\cdots\!00 \)
|
| $79$ |
\( (T^{2} + \cdots - 27530479433940)^{2} \)
|
| $83$ |
\( T^{4} + \cdots + 10\!\cdots\!96 \)
|
| $89$ |
\( (T^{2} + \cdots + 23581652152100)^{2} \)
|
| $97$ |
\( T^{4} + \cdots + 24\!\cdots\!00 \)
|
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