Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [693,4,Mod(1,693)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(693, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0, 0]))
N = Newforms(chi, 4, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("693.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 693 = 3^{2} \cdot 7 \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 693.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: | \(40.8883236340\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{17}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 4 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 231) |
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{17})\). 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 |
|
−0.561553 | 0 | −7.68466 | 3.31534 | 0 | 7.00000 | 8.80776 | 0 | −1.86174 | ||||||||||||||||||||||||
| 1.2 | 3.56155 | 0 | 4.68466 | 15.6847 | 0 | 7.00000 | −11.8078 | 0 | 55.8617 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \( -1 \) |
| \(7\) | \( -1 \) |
| \(11\) | \( +1 \) |
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 | 693.4.a.k | 2 | |
| 3.b | odd | 2 | 1 | 231.4.a.f | ✓ | 2 | |
| 21.c | even | 2 | 1 | 1617.4.a.i | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 231.4.a.f | ✓ | 2 | 3.b | odd | 2 | 1 | |
| 693.4.a.k | 2 | 1.a | even | 1 | 1 | trivial | |
| 1617.4.a.i | 2 | 21.c | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(693))\):
|
\( T_{2}^{2} - 3T_{2} - 2 \)
|
|
\( T_{5}^{2} - 19T_{5} + 52 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - 3T - 2 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} - 19T + 52 \)
|
| $7$ |
\( (T - 7)^{2} \)
|
| $11$ |
\( (T + 11)^{2} \)
|
| $13$ |
\( T^{2} - 11T - 2218 \)
|
| $17$ |
\( T^{2} - 146T + 5312 \)
|
| $19$ |
\( T^{2} + 101T - 1534 \)
|
| $23$ |
\( T^{2} - 184T + 7376 \)
|
| $29$ |
\( T^{2} - 217T + 10238 \)
|
| $31$ |
\( T^{2} - 20T - 4252 \)
|
| $37$ |
\( T^{2} + 173T - 54742 \)
|
| $41$ |
\( T^{2} - 60T - 82400 \)
|
| $43$ |
\( T^{2} + 164T + 6112 \)
|
| $47$ |
\( T^{2} - 467T - 64006 \)
|
| $53$ |
\( T^{2} + 326T + 3296 \)
|
| $59$ |
\( T^{2} - 781T + 109136 \)
|
| $61$ |
\( T^{2} + 148T - 64156 \)
|
| $67$ |
\( T^{2} - 473T - 62596 \)
|
| $71$ |
\( T^{2} - 756T - 470816 \)
|
| $73$ |
\( T^{2} + 213T + 10624 \)
|
| $79$ |
\( T^{2} - 168 T - 1005056 \)
|
| $83$ |
\( T^{2} - 2096 T + 1068316 \)
|
| $89$ |
\( T^{2} + 736 T - 1333988 \)
|
| $97$ |
\( T^{2} - 638T - 265592 \)
|
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