Newspace parameters
| Level: | \( N \) | \(=\) | \( 320 = 2^{6} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 2 \) |
| Character orbit: | \([\chi]\) | \(=\) | 320.c (of order \(2\), degree \(1\), not minimal) |
Newform invariants
| Self dual: | no |
| Analytic conductor: | \(2.55521286468\) |
| 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: | \(\Z[a_1, \ldots, a_{5}]\) |
| Coefficient ring index: | \( 2^{4} \) |
| 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
\( x^{4} + 3x^{2} + 1 \)
:
| \(\beta_{1}\) | \(=\) |
\( 2\nu \)
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| \(\beta_{2}\) | \(=\) |
\( 2\nu^{2} + 3 \)
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| \(\beta_{3}\) | \(=\) |
\( 4\nu^{3} + 10\nu \)
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| \(\nu\) | \(=\) |
\( ( \beta_1 ) / 2 \)
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| \(\nu^{2}\) | \(=\) |
\( ( \beta_{2} - 3 ) / 2 \)
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| \(\nu^{3}\) | \(=\) |
\( ( \beta_{3} - 5\beta_1 ) / 4 \)
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Character values
We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/320\mathbb{Z}\right)^\times\).
| \(n\) | \(191\) | \(257\) | \(261\) |
| \(\chi(n)\) | \(1\) | \(-1\) | \(1\) |
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 | − | 3.23607i | 0 | −2.23607 | 0 | − | 0.763932i | 0 | −7.47214 | 0 | ||||||||||||||||||||||||||||
| 129.2 | 0 | − | 1.23607i | 0 | 2.23607 | 0 | 5.23607i | 0 | 1.47214 | 0 | ||||||||||||||||||||||||||||||
| 129.3 | 0 | 1.23607i | 0 | 2.23607 | 0 | − | 5.23607i | 0 | 1.47214 | 0 | ||||||||||||||||||||||||||||||
| 129.4 | 0 | 3.23607i | 0 | −2.23607 | 0 | 0.763932i | 0 | −7.47214 | 0 | |||||||||||||||||||||||||||||||
Inner twists
| Char | Parity | Ord | Mult | Type |
|---|---|---|---|---|
| 1.a | even | 1 | 1 | trivial |
| 20.d | odd | 2 | 1 | CM by \(\Q(\sqrt{-5}) \) |
| 4.b | odd | 2 | 1 | inner |
| 5.b | 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 \(S_{2}^{\mathrm{new}}(320, [\chi])\):
|
\( T_{3}^{4} + 12T_{3}^{2} + 16 \)
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|
\( T_{11} \)
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Hecke characteristic polynomials
| $p$ | $F_p(T)$ |
|---|---|
| $2$ |
\( T^{4} \)
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| $3$ |
\( T^{4} + 12T^{2} + 16 \)
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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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| $29$ |
\( (T + 6)^{4} \)
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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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| $43$ |
\( T^{4} + 172T^{2} + 5776 \)
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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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| $67$ |
\( T^{4} + 268 T^{2} + 13456 \)
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| $71$ |
\( T^{4} \)
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| $73$ |
\( T^{4} \)
|
| $79$ |
\( T^{4} \)
|
| $83$ |
\( T^{4} + 332T^{2} + 5776 \)
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| $89$ |
\( (T + 6)^{4} \)
|
| $97$ |
\( T^{4} \)
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