Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [99,4,Mod(1,99)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(99, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([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("99.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 99 = 3^{2} \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 99.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: | \(5.84118909057\) |
| Analytic rank: | \(1\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{33}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 8 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 33) |
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{33})\). 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 |
|
−3.37228 | 0 | 3.37228 | 3.48913 | 0 | −4.74456 | 15.6060 | 0 | −11.7663 | ||||||||||||||||||||||||
| 1.2 | 2.37228 | 0 | −2.37228 | −19.4891 | 0 | 6.74456 | −24.6060 | 0 | −46.2337 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(3\) | \( -1 \) |
| \(11\) | \( +1 \) |
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 | 99.4.a.e | 2 | |
| 3.b | odd | 2 | 1 | 33.4.a.d | ✓ | 2 | |
| 4.b | odd | 2 | 1 | 1584.4.a.x | 2 | ||
| 5.b | even | 2 | 1 | 2475.4.a.o | 2 | ||
| 11.b | odd | 2 | 1 | 1089.4.a.t | 2 | ||
| 12.b | even | 2 | 1 | 528.4.a.o | 2 | ||
| 15.d | odd | 2 | 1 | 825.4.a.k | 2 | ||
| 15.e | even | 4 | 2 | 825.4.c.i | 4 | ||
| 21.c | even | 2 | 1 | 1617.4.a.j | 2 | ||
| 24.f | even | 2 | 1 | 2112.4.a.bh | 2 | ||
| 24.h | odd | 2 | 1 | 2112.4.a.ba | 2 | ||
| 33.d | even | 2 | 1 | 363.4.a.j | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 33.4.a.d | ✓ | 2 | 3.b | odd | 2 | 1 | |
| 99.4.a.e | 2 | 1.a | even | 1 | 1 | trivial | |
| 363.4.a.j | 2 | 33.d | even | 2 | 1 | ||
| 528.4.a.o | 2 | 12.b | even | 2 | 1 | ||
| 825.4.a.k | 2 | 15.d | odd | 2 | 1 | ||
| 825.4.c.i | 4 | 15.e | even | 4 | 2 | ||
| 1089.4.a.t | 2 | 11.b | odd | 2 | 1 | ||
| 1584.4.a.x | 2 | 4.b | odd | 2 | 1 | ||
| 1617.4.a.j | 2 | 21.c | even | 2 | 1 | ||
| 2112.4.a.ba | 2 | 24.h | odd | 2 | 1 | ||
| 2112.4.a.bh | 2 | 24.f | even | 2 | 1 | ||
| 2475.4.a.o | 2 | 5.b | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{2}^{2} + T_{2} - 8 \)
acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(99))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + T - 8 \)
|
| $3$ |
\( T^{2} \)
|
| $5$ |
\( T^{2} + 16T - 68 \)
|
| $7$ |
\( T^{2} - 2T - 32 \)
|
| $11$ |
\( (T + 11)^{2} \)
|
| $13$ |
\( T^{2} + 76T + 916 \)
|
| $17$ |
\( T^{2} - 26T - 7256 \)
|
| $19$ |
\( T^{2} + 54T - 1944 \)
|
| $23$ |
\( (T + 112)^{2} \)
|
| $29$ |
\( T^{2} + 222T - 5136 \)
|
| $31$ |
\( T^{2} + 40T - 88832 \)
|
| $37$ |
\( T^{2} + 48T - 15396 \)
|
| $41$ |
\( T^{2} - 494T + 60976 \)
|
| $43$ |
\( T^{2} + 66T - 59928 \)
|
| $47$ |
\( T^{2} - 64T - 17984 \)
|
| $53$ |
\( T^{2} - 84T - 133404 \)
|
| $59$ |
\( (T + 196)^{2} \)
|
| $61$ |
\( T^{2} + 1104 T + 282396 \)
|
| $67$ |
\( T^{2} - 928T + 24688 \)
|
| $71$ |
\( T^{2} + 456T - 227328 \)
|
| $73$ |
\( T^{2} + 592T - 436292 \)
|
| $79$ |
\( T^{2} + 230T - 31952 \)
|
| $83$ |
\( T^{2} + 348T - 835776 \)
|
| $89$ |
\( T^{2} + 972T + 235668 \)
|
| $97$ |
\( T^{2} + 1184 T - 1104836 \)
|
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