Invariants
| Level: | $40$ | $\SL_2$-level: | $40$ | Newform level: | $800$ | ||
| Index: | $960$ | $\PSL_2$-index: | $480$ | ||||
| Genus: | $33 = 1 + \frac{ 480 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 16 }{2}$ | ||||||
| Cusps: | $16$ (of which $4$ are rational) | Cusp widths | $20^{8}\cdot40^{8}$ | Cusp orbits | $1^{4}\cdot2^{4}\cdot4$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| Analytic rank: | $5$ | ||||||
| $\Q$-gonality: | $8 \le \gamma \le 10$ | ||||||
| $\overline{\Q}$-gonality: | $8 \le \gamma \le 10$ | ||||||
| Rational cusps: | $4$ | ||||||
| Rational CM points: | none |
Other labels
| Rouse, Sutherland, and Zureick-Brown (RSZB) label: | 40.960.33.189 |
Level structure
| $\GL_2(\Z/40\Z)$-generators: | $\begin{bmatrix}1&12\\0&7\end{bmatrix}$, $\begin{bmatrix}1&24\\28&9\end{bmatrix}$, $\begin{bmatrix}1&24\\32&37\end{bmatrix}$, $\begin{bmatrix}33&36\\8&3\end{bmatrix}$ |
| $\GL_2(\Z/40\Z)$-subgroup: | $C_2^3\times \GU(2,3)$ |
| Contains $-I$: | no $\quad$ (see 40.480.33.cw.2 for the level structure with $-I$) |
| Cyclic 40-isogeny field degree: | $6$ |
| Cyclic 40-torsion field degree: | $48$ |
| Full 40-torsion field degree: | $768$ |
Jacobian
| Conductor: | $2^{111}\cdot5^{64}$ |
| Simple: | no |
| Squarefree: | no |
| Decomposition: | $1^{15}\cdot2^{9}$ |
| Newforms: | 32.2.a.a, 50.2.a.b$^{5}$, 200.2.a.e$^{3}$, 200.2.d.a$^{3}$, 200.2.d.c$^{3}$, 400.2.a.a$^{2}$, 400.2.a.f$^{2}$, 800.2.a.c, 800.2.a.g, 800.2.a.k, 800.2.d.a, 800.2.d.c |
Rational points
This modular curve has 4 rational cusps but no known non-cuspidal rational points.
Modular covers
The following modular covers realize this modular curve as a fiber product over $X(1)$.
| Factor curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| $X_{S_4}(5)$ | $5$ | $192$ | $96$ | $0$ | $0$ | full Jacobian |
| 8.192.1-8.g.1.1 | $8$ | $5$ | $5$ | $1$ | $0$ | $1^{14}\cdot2^{9}$ |
This modular curve minimally covers the modular curves listed below.
| Covered curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 8.192.1-8.g.1.1 | $8$ | $5$ | $5$ | $1$ | $0$ | $1^{14}\cdot2^{9}$ |
| 40.480.16-40.d.2.5 | $40$ | $2$ | $2$ | $16$ | $3$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.d.2.23 | $40$ | $2$ | $2$ | $16$ | $3$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.f.1.1 | $40$ | $2$ | $2$ | $16$ | $1$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.f.1.11 | $40$ | $2$ | $2$ | $16$ | $1$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.bn.2.7 | $40$ | $2$ | $2$ | $16$ | $3$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.bn.2.9 | $40$ | $2$ | $2$ | $16$ | $3$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.bp.2.5 | $40$ | $2$ | $2$ | $16$ | $1$ | $1^{7}\cdot2^{5}$ |
| 40.480.16-40.bp.2.10 | $40$ | $2$ | $2$ | $16$ | $1$ | $1^{7}\cdot2^{5}$ |
| 40.480.17-40.w.1.9 | $40$ | $2$ | $2$ | $17$ | $3$ | $2^{8}$ |
| 40.480.17-40.w.1.24 | $40$ | $2$ | $2$ | $17$ | $3$ | $2^{8}$ |
| 40.480.17-40.bb.2.7 | $40$ | $2$ | $2$ | $17$ | $3$ | $1^{8}\cdot2^{4}$ |
| 40.480.17-40.bb.2.9 | $40$ | $2$ | $2$ | $17$ | $3$ | $1^{8}\cdot2^{4}$ |
| 40.480.17-40.bf.2.7 | $40$ | $2$ | $2$ | $17$ | $1$ | $1^{8}\cdot2^{4}$ |
| 40.480.17-40.bf.2.10 | $40$ | $2$ | $2$ | $17$ | $1$ | $1^{8}\cdot2^{4}$ |
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 40.1920.69-40.by.2.1 | $40$ | $2$ | $2$ | $69$ | $13$ | $1^{14}\cdot2^{7}\cdot4^{2}$ |
| 40.1920.69-40.by.3.2 | $40$ | $2$ | $2$ | $69$ | $13$ | $1^{14}\cdot2^{7}\cdot4^{2}$ |
| 40.1920.69-40.cc.3.1 | $40$ | $2$ | $2$ | $69$ | $12$ | $1^{14}\cdot2^{7}\cdot4^{2}$ |
| 40.1920.69-40.cc.4.3 | $40$ | $2$ | $2$ | $69$ | $12$ | $1^{14}\cdot2^{7}\cdot4^{2}$ |
| 40.2880.97-40.qu.2.9 | $40$ | $3$ | $3$ | $97$ | $10$ | $1^{28}\cdot2^{2}\cdot4^{8}$ |
| 40.3840.129-40.fw.2.5 | $40$ | $4$ | $4$ | $129$ | $20$ | $1^{40}\cdot2^{12}\cdot4^{8}$ |