Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [245,10,Mod(1,245)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(245, base_ring=CyclotomicField(2))
chi = DirichletCharacter(H, H._module([0, 0]))
N = Newforms(chi, 10, names="a")
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
chi := DirichletCharacter("245.1");
S:= CuspForms(chi, 10);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 245 = 5 \cdot 7^{2} \) |
| Weight: | \( k \) | \(=\) | \( 10 \) |
| Character orbit: | \([\chi]\) | \(=\) | 245.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: | \(126.183779860\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{1009}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - x - 252 \)
|
| Coefficient ring: | \(\Z[a_1, a_2]\) |
| Coefficient ring index: | \( 2 \) |
| Twist minimal: | no (minimal twist has level 5) |
| 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 \(\beta = \sqrt{1009}\). 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 |
|
−36.7648 | −193.530 | 839.648 | −625.000 | 7115.07 | 0 | −12045.9 | 17770.7 | 22978.0 | ||||||||||||||||||||||||
| 1.2 | 26.7648 | −66.4705 | 204.352 | −625.000 | −1779.07 | 0 | −8234.11 | −15264.7 | −16728.0 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(5\) | \(1\) |
| \(7\) | \(-1\) |
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 | 245.10.a.d | 2 | |
| 7.b | odd | 2 | 1 | 5.10.a.b | ✓ | 2 | |
| 21.c | even | 2 | 1 | 45.10.a.f | 2 | ||
| 28.d | even | 2 | 1 | 80.10.a.f | 2 | ||
| 35.c | odd | 2 | 1 | 25.10.a.b | 2 | ||
| 35.f | even | 4 | 2 | 25.10.b.b | 4 | ||
| 56.e | even | 2 | 1 | 320.10.a.s | 2 | ||
| 56.h | odd | 2 | 1 | 320.10.a.k | 2 | ||
| 105.g | even | 2 | 1 | 225.10.a.h | 2 | ||
| 105.k | odd | 4 | 2 | 225.10.b.h | 4 | ||
| 140.c | even | 2 | 1 | 400.10.a.t | 2 | ||
| 140.j | odd | 4 | 2 | 400.10.c.p | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 5.10.a.b | ✓ | 2 | 7.b | odd | 2 | 1 | |
| 25.10.a.b | 2 | 35.c | odd | 2 | 1 | ||
| 25.10.b.b | 4 | 35.f | even | 4 | 2 | ||
| 45.10.a.f | 2 | 21.c | even | 2 | 1 | ||
| 80.10.a.f | 2 | 28.d | even | 2 | 1 | ||
| 225.10.a.h | 2 | 105.g | even | 2 | 1 | ||
| 225.10.b.h | 4 | 105.k | odd | 4 | 2 | ||
| 245.10.a.d | 2 | 1.a | even | 1 | 1 | trivial | |
| 320.10.a.k | 2 | 56.h | odd | 2 | 1 | ||
| 320.10.a.s | 2 | 56.e | even | 2 | 1 | ||
| 400.10.a.t | 2 | 140.c | even | 2 | 1 | ||
| 400.10.c.p | 4 | 140.j | odd | 4 | 2 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{10}^{\mathrm{new}}(\Gamma_0(245))\):
|
\( T_{2}^{2} + 10T_{2} - 984 \)
|
|
\( T_{3}^{2} + 260T_{3} + 12864 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{2} + 10T - 984 \)
|
| $3$ |
\( T^{2} + 260T + 12864 \)
|
| $5$ |
\( (T + 625)^{2} \)
|
| $7$ |
\( T^{2} \)
|
| $11$ |
\( T^{2} + \cdots - 3498681936 \)
|
| $13$ |
\( T^{2} + \cdots + 1463044964 \)
|
| $17$ |
\( T^{2} + \cdots - 124159138524 \)
|
| $19$ |
\( T^{2} + \cdots + 13842837200 \)
|
| $23$ |
\( T^{2} + \cdots - 104453293536 \)
|
| $29$ |
\( T^{2} + \cdots - 8181719994300 \)
|
| $31$ |
\( T^{2} + \cdots - 23496920418816 \)
|
| $37$ |
\( T^{2} + \cdots + 69008321696356 \)
|
| $41$ |
\( T^{2} + \cdots + 157181579575044 \)
|
| $43$ |
\( T^{2} + \cdots + 698658564887264 \)
|
| $47$ |
\( T^{2} + \cdots + 576652311252096 \)
|
| $53$ |
\( T^{2} + \cdots - 924496505573436 \)
|
| $59$ |
\( T^{2} + \cdots - 16\!\cdots\!00 \)
|
| $61$ |
\( T^{2} + \cdots + 18\!\cdots\!64 \)
|
| $67$ |
\( T^{2} + \cdots - 58\!\cdots\!24 \)
|
| $71$ |
\( T^{2} + \cdots - 39\!\cdots\!76 \)
|
| $73$ |
\( T^{2} + \cdots - 75\!\cdots\!36 \)
|
| $79$ |
\( T^{2} + \cdots - 35\!\cdots\!00 \)
|
| $83$ |
\( T^{2} + \cdots + 48\!\cdots\!64 \)
|
| $89$ |
\( T^{2} + \cdots - 84\!\cdots\!00 \)
|
| $97$ |
\( T^{2} + \cdots + 94\!\cdots\!96 \)
|
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