Newspace parameters
comment: Compute space of new eigenforms
[N,k,chi] = [725,2,Mod(1,725)]
mf = mfinit([N,k,chi],0)
lf = mfeigenbasis(mf)
from sage.modular.dirichlet import DirichletCharacter
H = DirichletGroup(725, 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("725.1");
S:= CuspForms(chi, 2);
N := Newforms(S);
| Level: | \( N \) | \(=\) | \( 725 = 5^{2} \cdot 29 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 725.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: | \(5.78915414654\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(\sqrt{3}, \sqrt{11})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} - 7x^{2} + 4 \)
|
| Coefficient ring: | \(\Z[a_1, a_2, a_3]\) |
| Coefficient ring index: | \( 1 \) |
| Twist minimal: | no (minimal twist has level 145) |
| 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 \(1,\beta_1,\beta_2,\beta_3\) for the coefficient ring described below. We also show the integral \(q\)-expansion of the trace form.
Basis of coefficient ring in terms of a root \(\nu\) of
\( x^{4} - 7x^{2} + 4 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu \)
|
| \(\beta_{2}\) | \(=\) |
\( ( \nu^{3} - 5\nu ) / 2 \)
|
| \(\beta_{3}\) | \(=\) |
\( \nu^{2} - 4 \)
|
| \(\nu\) | \(=\) |
\( \beta_1 \)
|
| \(\nu^{2}\) | \(=\) |
\( \beta_{3} + 4 \)
|
| \(\nu^{3}\) | \(=\) |
\( 2\beta_{2} + 5\beta_1 \)
|
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 |
|
−1.73205 | −0.792287 | 1.00000 | 0 | 1.37228 | −5.04868 | 1.73205 | −2.37228 | 0 | ||||||||||||||||||||||||||||||
| 1.2 | −1.73205 | 2.52434 | 1.00000 | 0 | −4.37228 | 1.58457 | 1.73205 | 3.37228 | 0 | |||||||||||||||||||||||||||||||
| 1.3 | 1.73205 | −2.52434 | 1.00000 | 0 | −4.37228 | −1.58457 | −1.73205 | 3.37228 | 0 | |||||||||||||||||||||||||||||||
| 1.4 | 1.73205 | 0.792287 | 1.00000 | 0 | 1.37228 | 5.04868 | −1.73205 | −2.37228 | 0 | |||||||||||||||||||||||||||||||
Atkin-Lehner signs
| \( p \) | Sign |
|---|---|
| \(5\) | \(-1\) |
| \(29\) | \(1\) |
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 5.b | even | 2 | 1 | inner |
Twists
| By twisting character orbit | |||||||
|---|---|---|---|---|---|---|---|
| Char | Parity | Ord | Mult | Type | Twist | Min | Dim |
| 1.a | even | 1 | 1 | trivial | 725.2.a.g | 4 | |
| 3.b | odd | 2 | 1 | 6525.2.a.bk | 4 | ||
| 5.b | even | 2 | 1 | inner | 725.2.a.g | 4 | |
| 5.c | odd | 4 | 2 | 145.2.b.a | ✓ | 4 | |
| 15.d | odd | 2 | 1 | 6525.2.a.bk | 4 | ||
| 15.e | even | 4 | 2 | 1305.2.c.e | 4 | ||
| 20.e | even | 4 | 2 | 2320.2.d.c | 4 | ||
| By twisted newform orbit | |||||||
|---|---|---|---|---|---|---|---|
| Twist | Min | Dim | Char | Parity | Ord | Mult | Type |
| 145.2.b.a | ✓ | 4 | 5.c | odd | 4 | 2 | |
| 725.2.a.g | 4 | 1.a | even | 1 | 1 | trivial | |
| 725.2.a.g | 4 | 5.b | even | 2 | 1 | inner | |
| 1305.2.c.e | 4 | 15.e | even | 4 | 2 | ||
| 2320.2.d.c | 4 | 20.e | even | 4 | 2 | ||
| 6525.2.a.bk | 4 | 3.b | odd | 2 | 1 | ||
| 6525.2.a.bk | 4 | 15.d | odd | 2 | 1 | ||
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(\Gamma_0(725))\):
|
\( T_{2}^{2} - 3 \)
|
|
\( T_{3}^{4} - 7T_{3}^{2} + 4 \)
|
Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( (T^{2} - 3)^{2} \)
|
| $3$ |
\( T^{4} - 7T^{2} + 4 \)
|
| $5$ |
\( T^{4} \)
|
| $7$ |
\( T^{4} - 28T^{2} + 64 \)
|
| $11$ |
\( (T^{2} - 7 T + 4)^{2} \)
|
| $13$ |
\( T^{4} - 19T^{2} + 16 \)
|
| $17$ |
\( T^{4} - 28T^{2} + 64 \)
|
| $19$ |
\( (T - 4)^{4} \)
|
| $23$ |
\( (T^{2} - 12)^{2} \)
|
| $29$ |
\( (T + 1)^{4} \)
|
| $31$ |
\( (T^{2} + T - 8)^{2} \)
|
| $37$ |
\( T^{4} - 112T^{2} + 1024 \)
|
| $41$ |
\( (T^{2} - 2 T - 32)^{2} \)
|
| $43$ |
\( T^{4} - 151T^{2} + 3844 \)
|
| $47$ |
\( T^{4} - 151T^{2} + 3844 \)
|
| $53$ |
\( T^{4} - 19T^{2} + 16 \)
|
| $59$ |
\( (T^{2} + 10 T - 8)^{2} \)
|
| $61$ |
\( (T - 6)^{4} \)
|
| $67$ |
\( T^{4} - 76T^{2} + 256 \)
|
| $71$ |
\( (T^{2} - 2 T - 32)^{2} \)
|
| $73$ |
\( (T^{2} - 48)^{2} \)
|
| $79$ |
\( (T^{2} - 17 T + 64)^{2} \)
|
| $83$ |
\( T^{4} - 376 T^{2} + 26896 \)
|
| $89$ |
\( (T^{2} - 10 T - 8)^{2} \)
|
| $97$ |
\( (T^{2} - 48)^{2} \)
|
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