Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [3971,2,Mod(1,3971)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(3971, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 2, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("3971.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 3971 = 11 \cdot 19^{2} \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 3971.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: | \(31.7085946427\) |
| Analytic rank: | \(2\) |
| Dimension: | \(3\) |
| Coefficient field: | \(\Q(\zeta_{18})^+\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{3} - 3x - 1 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 209) |
| 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 a basis \(1,\beta_1,\beta_2\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of \(\nu = \zeta_{18} + \zeta_{18}^{-1}\):
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( \nu^{2} - 2 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{2} + 2 \)
|
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 | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.1 |
|
−2.53209 | −2.00000 | 4.41147 | −3.87939 | 5.06418 | −3.53209 | −6.10607 | 1.00000 | 9.82295 | |||||||||||||||||||||||||||
| 1.2 | −1.34730 | −2.00000 | −0.184793 | −0.467911 | 2.69459 | −2.34730 | 2.94356 | 1.00000 | 0.630415 | ||||||||||||||||||||||||||||
| 1.3 | 0.879385 | −2.00000 | −1.22668 | −1.65270 | −1.75877 | −0.120615 | −2.83750 | 1.00000 | −1.45336 | ||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(11\) | \(-1\) |
| \(19\) | \(1\) |
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 | 3971.2.a.e | 3 | |
| 19.b | odd | 2 | 1 | 3971.2.a.f | 3 | ||
| 19.e | even | 9 | 2 | 209.2.j.a | ✓ | 6 | |
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 209.2.j.a | ✓ | 6 | 19.e | even | 9 | 2 | |
| 3971.2.a.e | 3 | 1.a | even | 1 | 1 | trivial | |
| 3971.2.a.f | 3 | 19.b | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(3971))\):
|
\( T_{2}^{3} + 3T_{2}^{2} - 3 \)
|
|
\( T_{3} + 2 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{3} + 3T^{2} - 3 \)
|
| $3$ |
\( (T + 2)^{3} \)
|
| $5$ |
\( T^{3} + 6 T^{2} + 9 T + 3 \)
|
| $7$ |
\( T^{3} + 6 T^{2} + 9 T + 1 \)
|
| $11$ |
\( (T - 1)^{3} \)
|
| $13$ |
\( T^{3} + 6 T^{2} - 9 T - 71 \)
|
| $17$ |
\( T^{3} + 15 T^{2} + 72 T + 111 \)
|
| $19$ |
\( T^{3} \)
|
| $23$ |
\( T^{3} + 9 T^{2} + 18 T - 9 \)
|
| $29$ |
\( T^{3} + 12 T^{2} + 36 T + 24 \)
|
| $31$ |
\( T^{3} - 3 T^{2} - 36 T + 127 \)
|
| $37$ |
\( T^{3} + 9 T^{2} + 24 T + 19 \)
|
| $41$ |
\( T^{3} - 9T + 9 \)
|
| $43$ |
\( T^{3} + 18 T^{2} + 87 T + 73 \)
|
| $47$ |
\( T^{3} + 9 T^{2} - 54 T - 459 \)
|
| $53$ |
\( T^{3} + 9 T^{2} - 81 T - 513 \)
|
| $59$ |
\( T^{3} + 3 T^{2} - 81 T + 213 \)
|
| $61$ |
\( T^{3} + 18 T^{2} + 69 T - 107 \)
|
| $67$ |
\( T^{3} + 15 T^{2} - 18 T - 359 \)
|
| $71$ |
\( T^{3} - 6 T^{2} - 135 T - 57 \)
|
| $73$ |
\( T^{3} + 33 T^{2} + 342 T + 1063 \)
|
| $79$ |
\( T^{3} + 12 T^{2} + 21 T - 17 \)
|
| $83$ |
\( T^{3} + 6 T^{2} - 99 T + 219 \)
|
| $89$ |
\( T^{3} + 3 T^{2} - 90 T - 111 \)
|
| $97$ |
\( T^{3} - 6 T^{2} - 69 T + 397 \)
|
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