Newspace parameters
| Level: | \( N \) | \(=\) | \( 1280 = 2^{8} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1280.f (of order \(2\), degree \(1\), not minimal) |
Newform invariants
| Self dual: | no |
| Analytic conductor: | \(10.2208514587\) |
| Analytic rank: | \(0\) |
| Dimension: | \(4\) |
| Coefficient field: | \(\Q(i, \sqrt{5})\) |
|
comment: defining polynomial
gp: f.mod \\ as an extension of the character field
|
|
| Defining polynomial: |
\( x^{4} + 3x^{2} + 1 \)
|
| Coefficient ring: | \(\Z[a_1, \ldots, a_{7}]\) |
| Coefficient ring index: | \( 2^{2} \) |
| Twist minimal: | no (minimal twist has level 160) |
| Sato-Tate group: | $\mathrm{U}(1)[D_{2}]$ |
$q$-expansion
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
\( x^{4} + 3x^{2} + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( \nu^{3} + 2\nu \)
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| \(\beta_{2}\) | \(=\) |
\( \nu^{3} + 4\nu \)
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| \(\beta_{3}\) | \(=\) |
\( 2\nu^{2} + 3 \)
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| \(\nu\) | \(=\) |
\( ( \beta_{2} - \beta_1 ) / 2 \)
|
| \(\nu^{2}\) | \(=\) |
\( ( \beta_{3} - 3 ) / 2 \)
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| \(\nu^{3}\) | \(=\) |
\( -\beta_{2} + 2\beta_1 \)
|
Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/1280\mathbb{Z}\right)^\times\).
| \(n\) | \(257\) | \(261\) | \(511\) |
| \(\chi(n)\) | \(-1\) | \(-1\) | \(1\) |
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.
| Label | \(\iota_m(\nu)\) | \( a_{2} \) | \( a_{3} \) | \( a_{4} \) | \( a_{5} \) | \( a_{6} \) | \( a_{7} \) | \( a_{8} \) | \( a_{9} \) | \( a_{10} \) | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 129.1 |
|
0 | −3.23607 | 0 | − | 2.23607i | 0 | 0.763932i | 0 | 7.47214 | 0 | |||||||||||||||||||||||||||||
| 129.2 | 0 | −3.23607 | 0 | 2.23607i | 0 | − | 0.763932i | 0 | 7.47214 | 0 | ||||||||||||||||||||||||||||||
| 129.3 | 0 | 1.23607 | 0 | − | 2.23607i | 0 | − | 5.23607i | 0 | −1.47214 | 0 | |||||||||||||||||||||||||||||
| 129.4 | 0 | 1.23607 | 0 | 2.23607i | 0 | 5.23607i | 0 | −1.47214 | 0 | |||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 20.d | odd | 2 | 1 | CM by \(\Q(\sqrt{-5}) \) |
| 8.d | odd | 2 | 1 | inner |
| 40.f | even | 2 | 1 | inner |
Twists
Hecke kernels
This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(1280, [\chi])\):
|
\( T_{3}^{2} + 2T_{3} - 4 \)
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|
\( T_{13} \)
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Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
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| $3$ |
\( (T^{2} + 2 T - 4)^{2} \)
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| $5$ |
\( (T^{2} + 5)^{2} \)
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| $7$ |
\( T^{4} + 28T^{2} + 16 \)
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| $11$ |
\( T^{4} \)
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| $13$ |
\( T^{4} \)
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| $17$ |
\( T^{4} \)
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| $19$ |
\( T^{4} \)
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| $23$ |
\( T^{4} + 92T^{2} + 1936 \)
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| $29$ |
\( (T^{2} + 36)^{2} \)
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| $31$ |
\( T^{4} \)
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| $37$ |
\( T^{4} \)
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| $41$ |
\( (T^{2} - 20)^{2} \)
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| $43$ |
\( (T^{2} - 18 T + 76)^{2} \)
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| $47$ |
\( T^{4} + 188T^{2} + 16 \)
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| $53$ |
\( T^{4} \)
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| $59$ |
\( T^{4} \)
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| $61$ |
\( (T^{2} + 180)^{2} \)
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| $67$ |
\( (T^{2} - 6 T - 116)^{2} \)
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| $71$ |
\( T^{4} \)
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| $73$ |
\( T^{4} \)
|
| $79$ |
\( T^{4} \)
|
| $83$ |
\( (T^{2} - 22 T + 76)^{2} \)
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| $89$ |
\( (T - 6)^{4} \)
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| $97$ |
\( T^{4} \)
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