Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [315,6,Mod(1,315)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(315, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 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("315.1");
S:= CuspForms(chi, 6);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 315 = 3^{2} \cdot 5 \cdot 7 \) |
| Weight: | \( k \) | \(=\) | \( 6 \) |
| Character orbit: | \([\chi]\) | \(=\) | 315.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: | \(50.5209032411\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{73}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 18 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 105) |
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{73})\). 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 |
|
−3.77200 | 0 | −17.7720 | 25.0000 | 0 | 49.0000 | 187.740 | 0 | −94.3000 | ||||||||||||||||||||||||
| 1.2 | 4.77200 | 0 | −9.22800 | 25.0000 | 0 | 49.0000 | −196.740 | 0 | 119.300 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \(-1\) |
| \(5\) | \(-1\) |
| \(7\) | \(-1\) |
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 | 315.6.a.e | 2 | |
| 3.b | odd | 2 | 1 | 105.6.a.d | ✓ | 2 | |
| 15.d | odd | 2 | 1 | 525.6.a.g | 2 | ||
| 15.e | even | 4 | 2 | 525.6.d.j | 4 | ||
| 21.c | even | 2 | 1 | 735.6.a.f | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 105.6.a.d | ✓ | 2 | 3.b | odd | 2 | 1 | |
| 315.6.a.e | 2 | 1.a | even | 1 | 1 | trivial | |
| 525.6.a.g | 2 | 15.d | odd | 2 | 1 | ||
| 525.6.d.j | 4 | 15.e | even | 4 | 2 | ||
| 735.6.a.f | 2 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{2} - T_{2} - 18 \)
acting on \(S_{6}^{\mathrm{new}}(\Gamma_0(315))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - T - 18 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( (T - 25)^{2} \)
|
| $7$ |
\( (T - 49)^{2} \)
|
| $11$ |
\( T^{2} - 396T - 26496 \)
|
| $13$ |
\( T^{2} + 232T - 70932 \)
|
| $17$ |
\( T^{2} - 2372 T + 1265268 \)
|
| $19$ |
\( T^{2} + 1044 T - 5698624 \)
|
| $23$ |
\( T^{2} - 4112 T + 3661824 \)
|
| $29$ |
\( T^{2} - 3148 T - 10155612 \)
|
| $31$ |
\( T^{2} + 4380 T - 16648672 \)
|
| $37$ |
\( T^{2} + 4716 T - 11824348 \)
|
| $41$ |
\( T^{2} - 15780 T - 115400700 \)
|
| $43$ |
\( T^{2} + 13752 T + 9014528 \)
|
| $47$ |
\( T^{2} + 2896 T - 158667984 \)
|
| $53$ |
\( T^{2} - 36112 T + 274264764 \)
|
| $59$ |
\( T^{2} - 11584 T - 116985744 \)
|
| $61$ |
\( T^{2} - 40932 T - 200164156 \)
|
| $67$ |
\( T^{2} + \cdots + 2005401536 \)
|
| $71$ |
\( T^{2} + \cdots - 1677718656 \)
|
| $73$ |
\( T^{2} + \cdots - 1704362644 \)
|
| $79$ |
\( T^{2} + \cdots - 2262667136 \)
|
| $83$ |
\( T^{2} + \cdots + 1176371184 \)
|
| $89$ |
\( T^{2} + \cdots - 5196718908 \)
|
| $97$ |
\( T^{2} + \cdots - 3560972868 \)
|
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