Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [1617,4,Mod(1,1617)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(1617, 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("1617.1");
S:= CuspForms(chi, 4);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 1617 = 3 \cdot 7^{2} \cdot 11 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1617.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: | \(95.4060884793\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{97}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 24 \)
|
| 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 \(\beta = \frac{1}{2}(1 + \sqrt{97})\). 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 |
|
−4.42443 | 3.00000 | 11.5756 | −2.84886 | −13.2733 | 0 | −15.8199 | 9.00000 | 12.6046 | ||||||||||||||||||||||||
| 1.2 | 5.42443 | 3.00000 | 21.4244 | 16.8489 | 16.2733 | 0 | 72.8199 | 9.00000 | 91.3954 | |||||||||||||||||||||||||
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 | 1617.4.a.k | 2 | |
| 7.b | odd | 2 | 1 | 33.4.a.c | ✓ | 2 | |
| 21.c | even | 2 | 1 | 99.4.a.f | 2 | ||
| 28.d | even | 2 | 1 | 528.4.a.p | 2 | ||
| 35.c | odd | 2 | 1 | 825.4.a.l | 2 | ||
| 35.f | even | 4 | 2 | 825.4.c.h | 4 | ||
| 56.e | even | 2 | 1 | 2112.4.a.bg | 2 | ||
| 56.h | odd | 2 | 1 | 2112.4.a.bn | 2 | ||
| 77.b | even | 2 | 1 | 363.4.a.i | 2 | ||
| 84.h | odd | 2 | 1 | 1584.4.a.bj | 2 | ||
| 105.g | even | 2 | 1 | 2475.4.a.p | 2 | ||
| 231.h | odd | 2 | 1 | 1089.4.a.u | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 33.4.a.c | ✓ | 2 | 7.b | odd | 2 | 1 | |
| 99.4.a.f | 2 | 21.c | even | 2 | 1 | ||
| 363.4.a.i | 2 | 77.b | even | 2 | 1 | ||
| 528.4.a.p | 2 | 28.d | even | 2 | 1 | ||
| 825.4.a.l | 2 | 35.c | odd | 2 | 1 | ||
| 825.4.c.h | 4 | 35.f | even | 4 | 2 | ||
| 1089.4.a.u | 2 | 231.h | odd | 2 | 1 | ||
| 1584.4.a.bj | 2 | 84.h | odd | 2 | 1 | ||
| 1617.4.a.k | 2 | 1.a | even | 1 | 1 | trivial | |
| 2112.4.a.bg | 2 | 56.e | even | 2 | 1 | ||
| 2112.4.a.bn | 2 | 56.h | odd | 2 | 1 | ||
| 2475.4.a.p | 2 | 105.g | even | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{4}^{\mathrm{new}}(\Gamma_0(1617))\):
|
\( T_{2}^{2} - T_{2} - 24 \)
|
|
\( T_{5}^{2} - 14T_{5} - 48 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} - T - 24 \)
|
| $3$ |
\( (T - 3)^{2} \)
|
| $5$ |
\( T^{2} - 14T - 48 \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( (T + 11)^{2} \)
|
| $13$ |
\( T^{2} + 30T + 128 \)
|
| $17$ |
\( T^{2} + 106T - 1944 \)
|
| $19$ |
\( T^{2} + 50T + 528 \)
|
| $23$ |
\( T^{2} - 134T + 2064 \)
|
| $29$ |
\( T^{2} + 198T + 8928 \)
|
| $31$ |
\( T^{2} + 360T + 30848 \)
|
| $37$ |
\( T^{2} + 328T - 38676 \)
|
| $41$ |
\( T^{2} - 782T + 148128 \)
|
| $43$ |
\( T^{2} - 386T + 20856 \)
|
| $47$ |
\( T^{2} + 266T - 115104 \)
|
| $53$ |
\( T^{2} + 522T - 2592 \)
|
| $59$ |
\( T^{2} - 172T - 235104 \)
|
| $61$ |
\( T^{2} - 778T + 123288 \)
|
| $67$ |
\( T^{2} + 776T - 72944 \)
|
| $71$ |
\( T^{2} - 630T + 28512 \)
|
| $73$ |
\( T^{2} + 1296 T + 400892 \)
|
| $79$ |
\( T^{2} - 652T - 396572 \)
|
| $83$ |
\( T^{2} - 324T - 563904 \)
|
| $89$ |
\( T^{2} - 756T + 17172 \)
|
| $97$ |
\( T^{2} - 452T - 842876 \)
|
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