Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [490,6,Mod(1,490)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(490, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 6, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("490.1");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 490 = 2 \cdot 5 \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 490.a (trivial) |
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: | yes |
| Analytic conductor: | \(78.5880717084\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{1129}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 282 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 70) |
| Fricke sign: | \(1\) |
| Sato-Tate group: | $\mathrm{SU}(2)$ |
$q$-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 \(\beta = \frac{1}{2}(1 + \sqrt{1129})\). We also show the integral \(q\)-expansion of the trace form.
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
4.00000 | −19.3003 | 16.0000 | −25.0000 | −77.2012 | 0 | 64.0000 | 129.501 | −100.000 | ||||||||||||||||||||||||
| 1.2 | 4.00000 | 14.3003 | 16.0000 | −25.0000 | 57.2012 | 0 | 64.0000 | −38.5015 | −100.000 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(-1\) |
| \(5\) | \(1\) |
| \(7\) | \(-1\) |
Inner twists
This newform does not admit any (nontrivial) inner twists.
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 490.6.a.u | 2 | |
| 7.b | odd | 2 | 1 | 70.6.a.h | ✓ | 2 | |
| 21.c | even | 2 | 1 | 630.6.a.s | 2 | ||
| 28.d | even | 2 | 1 | 560.6.a.k | 2 | ||
| 35.c | odd | 2 | 1 | 350.6.a.p | 2 | ||
| 35.f | even | 4 | 2 | 350.6.c.k | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 70.6.a.h | ✓ | 2 | 7.b | odd | 2 | 1 | |
| 350.6.a.p | 2 | 35.c | odd | 2 | 1 | ||
| 350.6.c.k | 4 | 35.f | even | 4 | 2 | ||
| 490.6.a.u | 2 | 1.a | even | 1 | 1 | trivial | |
| 560.6.a.k | 2 | 28.d | even | 2 | 1 | ||
| 630.6.a.s | 2 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{3}^{2} + 5T_{3} - 276 \)
acting on \(S_{6}^{\mathrm{new}}(\Gamma_0(490))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T - 4)^{2} \)
|
| $3$ |
\( T^{2} + 5T - 276 \)
|
| $5$ |
\( (T + 25)^{2} \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} - 415T - 4644 \)
|
| $13$ |
\( T^{2} + 429T + 11858 \)
|
| $17$ |
\( T^{2} + 1319 T - 757566 \)
|
| $19$ |
\( T^{2} + 1918 T - 2748440 \)
|
| $23$ |
\( T^{2} + 1334 T - 2265840 \)
|
| $29$ |
\( T^{2} + 1131 T - 2121390 \)
|
| $31$ |
\( T^{2} - 5472 T - 49163008 \)
|
| $37$ |
\( T^{2} + 9156 T + 13732484 \)
|
| $41$ |
\( T^{2} - 7822 T + 11365872 \)
|
| $43$ |
\( T^{2} - 2078 T - 364446648 \)
|
| $47$ |
\( T^{2} - 8507 T - 572885328 \)
|
| $53$ |
\( T^{2} + 34242 T + 9748512 \)
|
| $59$ |
\( T^{2} + 6952 T - 48684720 \)
|
| $61$ |
\( T^{2} - 45138 T + 402952640 \)
|
| $67$ |
\( T^{2} + 54556 T + 649140384 \)
|
| $71$ |
\( T^{2} + 62272 T - 106007808 \)
|
| $73$ |
\( T^{2} + 40896 T - 405277060 \)
|
| $79$ |
\( T^{2} - 62069 T - 653150040 \)
|
| $83$ |
\( T^{2} + \cdots + 8986877424 \)
|
| $89$ |
\( T^{2} + \cdots - 1135587000 \)
|
| $97$ |
\( T^{2} + \cdots + 5804074010 \)
|
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