Invariants
| Level: | $56$ | $\SL_2$-level: | $8$ | Newform level: | $1568$ | ||
| Index: | $192$ | $\PSL_2$-index: | $96$ | ||||
| Genus: | $1 = 1 + \frac{ 96 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 16 }{2}$ | ||||||
| Cusps: | $16$ (none of which are rational) | Cusp widths | $4^{8}\cdot8^{8}$ | Cusp orbits | $2^{2}\cdot4^{3}$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| Analytic rank: | $1$ | ||||||
| $\Q$-gonality: | $2$ | ||||||
| $\overline{\Q}$-gonality: | $2$ | ||||||
| Rational cusps: | $0$ | ||||||
| Rational CM points: | none |
Other labels
| Cummins and Pauli (CP) label: | 8K1 |
| Rouse, Sutherland, and Zureick-Brown (RSZB) label: | 56.192.1.66 |
Level structure
| $\GL_2(\Z/56\Z)$-generators: | $\begin{bmatrix}21&52\\20&7\end{bmatrix}$, $\begin{bmatrix}47&16\\38&1\end{bmatrix}$, $\begin{bmatrix}49&4\\44&9\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 56.96.1.bd.2 for the level structure with $-I$) |
| Cyclic 56-isogeny field degree: | $16$ |
| Cyclic 56-torsion field degree: | $192$ |
| Full 56-torsion field degree: | $16128$ |
Jacobian
| Conductor: | $2^{5}\cdot7^{2}$ |
| Simple: | yes |
| Squarefree: | yes |
| Decomposition: | $1$ |
| Newforms: | 1568.2.a.e |
Models
Embedded model Embedded model in $\mathbb{P}^{3}$
| $ 0 $ | $=$ | $ 2 x^{2} - 4 y^{2} - z^{2} $ |
| $=$ | $6 x^{2} + 2 y^{2} + 4 z^{2} - w^{2}$ |
Rational points
This modular curve has real points and $\Q_p$ points for $p$ not dividing the level, but no known rational points.
Maps to other modular curves
$j$-invariant map of degree 96 from the embedded model of this modular curve to the modular curve $X(1)$ :
| $\displaystyle j$ | $=$ | $\displaystyle \frac{2^8}{7^2}\cdot\frac{(2401z^{8}-1372z^{6}w^{2}+245z^{4}w^{4}-14z^{2}w^{6}+w^{8})^{3}}{w^{8}z^{4}(7z^{2}-2w^{2})^{2}(7z^{2}-w^{2})^{4}}$ |
Modular covers
This modular curve minimally covers the modular curves listed below.
| Covered curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 8.96.0-8.e.2.6 | $8$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.d.1.8 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.d.1.14 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-8.e.2.4 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.o.2.6 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.o.2.13 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.q.2.6 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.0-56.q.2.14 | $56$ | $2$ | $2$ | $0$ | $0$ | full Jacobian |
| 56.96.1-56.v.1.5 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
| 56.96.1-56.v.1.10 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
| 56.96.1-56.bc.1.5 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
| 56.96.1-56.bc.1.15 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
| 56.96.1-56.be.1.7 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
| 56.96.1-56.be.1.9 | $56$ | $2$ | $2$ | $1$ | $1$ | dimension zero |
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 56.1536.49-56.gh.1.7 | $56$ | $8$ | $8$ | $49$ | $9$ | $1^{20}\cdot2^{6}\cdot4^{4}$ |
| 56.4032.145-56.pv.1.6 | $56$ | $21$ | $21$ | $145$ | $28$ | $1^{16}\cdot2^{26}\cdot4\cdot6^{4}\cdot12^{4}$ |
| 56.5376.193-56.qp.1.4 | $56$ | $28$ | $28$ | $193$ | $36$ | $1^{36}\cdot2^{32}\cdot4^{5}\cdot6^{4}\cdot12^{4}$ |