Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [78,10,Mod(1,78)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(78, 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("78.1");
S:= CuspForms(chi, 10);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 78 = 2 \cdot 3 \cdot 13 \) |
| Weight: | \( k \) | \(=\) | \( 10 \) |
| Character orbit: | \([\chi]\) | \(=\) | 78.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: | \(40.1727952208\) |
| Analytic rank: | \(0\) |
| Dimension: | \(2\) |
| Coefficient field: | \(\Q(\sqrt{14}) \) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{2} - 14 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2\cdot 3^{2} \) |
| Twist minimal: | yes |
| 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 \(\beta = 18\sqrt{14}\). 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 |
|
−16.0000 | 81.0000 | 256.000 | −150.049 | −1296.00 | −5905.53 | −4096.00 | 6561.00 | 2400.79 | ||||||||||||||||||||||||
| 1.2 | −16.0000 | 81.0000 | 256.000 | 254.049 | −1296.00 | 12009.5 | −4096.00 | 6561.00 | −4064.79 | |||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(2\) | \(1\) |
| \(3\) | \(-1\) |
| \(13\) | \(1\) |
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 | 78.10.a.c | ✓ | 2 |
| 3.b | odd | 2 | 1 | 234.10.a.h | 2 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 78.10.a.c | ✓ | 2 | 1.a | even | 1 | 1 | trivial |
| 234.10.a.h | 2 | 3.b | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the kernel of the linear operator
\( T_{5}^{2} - 104T_{5} - 38120 \)
acting on \(S_{10}^{\mathrm{new}}(\Gamma_0(78))\).
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T + 16)^{2} \)
|
| $3$ |
\( (T - 81)^{2} \)
|
| $5$ |
\( T^{2} - 104T - 38120 \)
|
| $7$ |
\( T^{2} - 6104 T - 70922600 \)
|
| $11$ |
\( T^{2} + \cdots - 1218680060 \)
|
| $13$ |
\( (T + 28561)^{2} \)
|
| $17$ |
\( T^{2} + \cdots + 75697935300 \)
|
| $19$ |
\( T^{2} + \cdots - 156560012136 \)
|
| $23$ |
\( T^{2} + \cdots - 10315720688 \)
|
| $29$ |
\( T^{2} + \cdots - 1650881913596 \)
|
| $31$ |
\( T^{2} + \cdots + 13953755193928 \)
|
| $37$ |
\( T^{2} + \cdots - 369567191395260 \)
|
| $41$ |
\( T^{2} + \cdots - 318923532423144 \)
|
| $43$ |
\( T^{2} + \cdots - 534011329307216 \)
|
| $47$ |
\( T^{2} + \cdots + 654620712193060 \)
|
| $53$ |
\( T^{2} + \cdots - 51\!\cdots\!60 \)
|
| $59$ |
\( T^{2} + \cdots + 23\!\cdots\!00 \)
|
| $61$ |
\( T^{2} + \cdots + 41\!\cdots\!80 \)
|
| $67$ |
\( T^{2} + \cdots + 15\!\cdots\!56 \)
|
| $71$ |
\( T^{2} + \cdots + 59\!\cdots\!68 \)
|
| $73$ |
\( T^{2} + \cdots - 85\!\cdots\!64 \)
|
| $79$ |
\( T^{2} + \cdots + 90\!\cdots\!72 \)
|
| $83$ |
\( T^{2} + \cdots - 13\!\cdots\!44 \)
|
| $89$ |
\( T^{2} + \cdots + 11\!\cdots\!60 \)
|
| $97$ |
\( T^{2} + \cdots + 78\!\cdots\!52 \)
|
| show more | |
| show less |