Invariants
| Level: | $56$ | $\SL_2$-level: | $56$ | Newform level: | $3136$ | ||
| 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: | $1$ | ||||||
| $\Q$-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: | 56E21 |
| Rouse, Sutherland, and Zureick-Brown (RSZB) label: | 56.672.21.461 |
Level structure
| $\GL_2(\Z/56\Z)$-generators: | $\begin{bmatrix}1&27\\48&45\end{bmatrix}$, $\begin{bmatrix}23&28\\24&33\end{bmatrix}$, $\begin{bmatrix}33&41\\20&7\end{bmatrix}$, $\begin{bmatrix}33&55\\48&7\end{bmatrix}$, $\begin{bmatrix}55&23\\0&15\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 56.336.21.cm.1 for the level structure with $-I$) |
| Cyclic 56-isogeny field degree: | $4$ |
| Cyclic 56-torsion field degree: | $48$ |
| Full 56-torsion field degree: | $4608$ |
Jacobian
| Conductor: | $2^{84}\cdot7^{37}$ |
| Simple: | no |
| Squarefree: | no |
| Decomposition: | $1^{13}\cdot2^{4}$ |
| Newforms: | 14.2.a.a$^{2}$, 98.2.a.b$^{2}$, 196.2.a.b, 196.2.a.c, 448.2.a.c, 448.2.a.d, 448.2.a.g, 3136.2.a.bb, 3136.2.a.bt, 3136.2.a.e, 3136.2.a.i, 3136.2.a.n, 3136.2.a.q, 3136.2.a.v, 3136.2.a.w |
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 |
|---|---|---|---|---|---|---|
| 28.336.9-28.c.1.7 | $28$ | $2$ | $2$ | $9$ | $0$ | $1^{10}\cdot2$ |
| 56.336.9-28.c.1.2 | $56$ | $2$ | $2$ | $9$ | $0$ | $1^{10}\cdot2$ |
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.nc.1.14 | $56$ | $2$ | $2$ | $41$ | $8$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.nf.1.20 | $56$ | $2$ | $2$ | $41$ | $2$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.nt.1.24 | $56$ | $2$ | $2$ | $41$ | $12$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.nu.1.16 | $56$ | $2$ | $2$ | $41$ | $12$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.om.1.15 | $56$ | $2$ | $2$ | $41$ | $12$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.op.1.14 | $56$ | $2$ | $2$ | $41$ | $5$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.ov.1.24 | $56$ | $2$ | $2$ | $41$ | $7$ | $1^{14}\cdot2^{3}$ |
| 56.1344.41-56.ow.1.16 | $56$ | $2$ | $2$ | $41$ | $10$ | $1^{14}\cdot2^{3}$ |
| 56.1344.45-56.n.1.9 | $56$ | $2$ | $2$ | $45$ | $12$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.cm.1.15 | $56$ | $2$ | $2$ | $45$ | $5$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.ds.1.4 | $56$ | $2$ | $2$ | $45$ | $7$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.du.1.16 | $56$ | $2$ | $2$ | $45$ | $15$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.fk.1.16 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.fm.1.16 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.fw.1.16 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.fy.1.16 | $56$ | $2$ | $2$ | $45$ | $12$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.hh.1.12 | $56$ | $2$ | $2$ | $45$ | $11$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.hi.1.12 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.ho.1.12 | $56$ | $2$ | $2$ | $45$ | $9$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.hr.1.12 | $56$ | $2$ | $2$ | $45$ | $12$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.ij.1.24 | $56$ | $2$ | $2$ | $45$ | $12$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.ik.1.16 | $56$ | $2$ | $2$ | $45$ | $5$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.iy.1.12 | $56$ | $2$ | $2$ | $45$ | $7$ | $1^{16}\cdot2^{4}$ |
| 56.1344.45-56.jb.1.12 | $56$ | $2$ | $2$ | $45$ | $15$ | $1^{16}\cdot2^{4}$ |
| 56.2016.61-56.hg.1.30 | $56$ | $3$ | $3$ | $61$ | $15$ | $1^{26}\cdot2^{7}$ |