Invariants
| Level: | $56$ | $\SL_2$-level: | $56$ | Newform level: | $392$ | ||
| Index: | $672$ | $\PSL_2$-index: | $336$ | ||||
| Genus: | $21 = 1 + \frac{ 336 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 16 }{2}$ | ||||||
| Cusps: | $16$ (of which $2$ are rational) | Cusp widths | $7^{8}\cdot14^{4}\cdot56^{4}$ | Cusp orbits | $1^{2}\cdot2\cdot3^{2}\cdot6$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| Analytic rank: | $3$ | ||||||
| $\Q$-gonality: | $6 \le \gamma \le 12$ | ||||||
| $\overline{\Q}$-gonality: | $6 \le \gamma \le 12$ | ||||||
| Rational cusps: | $2$ | ||||||
| Rational CM points: | none |
Other labels
| Cummins and Pauli (CP) label: | 56F21 |
| Rouse, Sutherland, and Zureick-Brown (RSZB) label: | 56.672.21.1021 |
Level structure
| $\GL_2(\Z/56\Z)$-generators: | $\begin{bmatrix}20&35\\7&48\end{bmatrix}$, $\begin{bmatrix}20&45\\49&36\end{bmatrix}$, $\begin{bmatrix}28&3\\27&24\end{bmatrix}$, $\begin{bmatrix}38&49\\45&46\end{bmatrix}$, $\begin{bmatrix}41&10\\20&51\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 56.336.21.cl.1 for the level structure with $-I$) |
| Cyclic 56-isogeny field degree: | $4$ |
| Cyclic 56-torsion field degree: | $96$ |
| Full 56-torsion field degree: | $4608$ |
Jacobian
| Conductor: | $2^{39}\cdot7^{40}$ |
| Simple: | no |
| Squarefree: | no |
| Decomposition: | $1^{9}\cdot2^{6}$ |
| Newforms: | 14.2.a.a$^{2}$, 98.2.a.a, 98.2.a.b$^{3}$, 196.2.a.a, 196.2.a.b, 196.2.a.c$^{2}$, 392.2.a.a, 392.2.a.b, 392.2.a.d, 392.2.a.e, 392.2.a.g |
Rational points
This modular curve has 2 rational cusps but no known non-cuspidal rational points.
Modular covers
This modular curve minimally covers the modular curves listed below.
| Covered curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 56.24.0-56.z.1.8 | $56$ | $28$ | $28$ | $0$ | $0$ | full Jacobian |
| 56.336.9-28.c.1.2 | $56$ | $2$ | $2$ | $9$ | $0$ | $1^{6}\cdot2^{3}$ |
| 56.336.9-28.c.1.6 | $56$ | $2$ | $2$ | $9$ | $0$ | $1^{6}\cdot2^{3}$ |
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 56.1344.41-56.nh.1.22 | $56$ | $2$ | $2$ | $41$ | $6$ | $1^{18}\cdot2$ |
| 56.1344.41-56.nj.1.14 | $56$ | $2$ | $2$ | $41$ | $16$ | $1^{18}\cdot2$ |
| 56.1344.41-56.nl.1.16 | $56$ | $2$ | $2$ | $41$ | $14$ | $1^{18}\cdot2$ |
| 56.1344.41-56.nn.1.16 | $56$ | $2$ | $2$ | $41$ | $7$ | $1^{18}\cdot2$ |
| 56.1344.41-56.on.1.15 | $56$ | $2$ | $2$ | $41$ | $12$ | $1^{18}\cdot2$ |
| 56.1344.41-56.op.1.14 | $56$ | $2$ | $2$ | $41$ | $5$ | $1^{18}\cdot2$ |
| 56.1344.41-56.or.1.24 | $56$ | $2$ | $2$ | $41$ | $6$ | $1^{18}\cdot2$ |
| 56.1344.41-56.ot.1.16 | $56$ | $2$ | $2$ | $41$ | $18$ | $1^{18}\cdot2$ |
| 56.1344.45-56.cf.1.5 | $56$ | $2$ | $2$ | $45$ | $8$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.cq.1.14 | $56$ | $2$ | $2$ | $45$ | $10$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.dn.1.7 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.do.1.10 | $56$ | $2$ | $2$ | $45$ | $19$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.fh.1.22 | $56$ | $2$ | $2$ | $45$ | $8$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.fi.1.15 | $56$ | $2$ | $2$ | $45$ | $10$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.fs.1.10 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.fv.1.13 | $56$ | $2$ | $2$ | $45$ | $19$ | $1^{12}\cdot2^{6}$ |
| 56.1344.45-56.hh.1.16 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.hj.1.16 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.hl.1.16 | $56$ | $2$ | $2$ | $45$ | $17$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.hn.1.16 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.in.1.14 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.ip.1.14 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.ir.1.12 | $56$ | $2$ | $2$ | $45$ | $17$ | $1^{20}\cdot2^{2}$ |
| 56.1344.45-56.it.1.12 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{20}\cdot2^{2}$ |
| 56.2016.61-56.hp.1.20 | $56$ | $3$ | $3$ | $61$ | $10$ | $1^{26}\cdot2^{7}$ |