Invariants
Level: | $80$ | $\SL_2$-level: | $16$ | Newform level: | $128$ | ||
Index: | $192$ | $\PSL_2$-index: | $96$ | ||||
Genus: | $5 = 1 + \frac{ 96 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 8 }{2}$ | ||||||
Cusps: | $8$ (of which $4$ are rational) | Cusp widths | $8^{4}\cdot16^{4}$ | Cusp orbits | $1^{4}\cdot2^{2}$ | ||
Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
Analytic rank: | not computed | ||||||
$\Q$-gonality: | $3 \le \gamma \le 5$ | ||||||
$\overline{\Q}$-gonality: | $3 \le \gamma \le 5$ | ||||||
Rational cusps: | $4$ | ||||||
Rational CM points: | none |
Other labels
Cummins and Pauli (CP) label: | 16C5 |
Level structure
$\GL_2(\Z/80\Z)$-generators: | $\begin{bmatrix}7&10\\54&7\end{bmatrix}$, $\begin{bmatrix}13&38\\52&11\end{bmatrix}$, $\begin{bmatrix}33&2\\40&31\end{bmatrix}$, $\begin{bmatrix}39&62\\16&49\end{bmatrix}$, $\begin{bmatrix}51&14\\68&41\end{bmatrix}$ |
Contains $-I$: | no $\quad$ (see 16.96.5.v.2 for the level structure with $-I$) |
Cyclic 80-isogeny field degree: | $24$ |
Cyclic 80-torsion field degree: | $768$ |
Full 80-torsion field degree: | $61440$ |
Models
Canonical model in $\mathbb{P}^{ 4 }$ defined by 3 equations
$ 0 $ | $=$ | $ 2 y^{2} - w^{2} + w t $ |
$=$ | $2 z^{2} - w t - t^{2}$ | |
$=$ | $2 x^{2} + y z$ |
Singular plane model Singular plane model
$ 0 $ | $=$ | $ 2 x^{8} - 3 x^{4} y^{2} z^{2} - 4 y^{6} z^{2} + y^{4} z^{4} $ |
Rational points
This modular curve has 4 rational cusps but no known non-cuspidal rational points. The following are the coordinates of the rational cusps on this modular curve.
Canonical model |
---|
$(0:1:0:-1:1)$, $(0:-1:0:-1:1)$, $(0:0:-1:1:1)$, $(0:0:1:1:1)$ |
Maps to other modular curves
Map of degree 2 from the canonical model of this modular curve to the canonical model of the modular curve 16.48.3.d.1 :
$\displaystyle X$ | $=$ | $\displaystyle -2x$ |
$\displaystyle Y$ | $=$ | $\displaystyle t$ |
$\displaystyle Z$ | $=$ | $\displaystyle -w$ |
Equation of the image curve:
$0$ | $=$ | $ X^{4}-Y^{3}Z+YZ^{3} $ |
Map of degree 1 from the canonical model of this modular curve to the plane model of the modular curve 16.96.5.v.2 :
$\displaystyle X$ | $=$ | $\displaystyle x$ |
$\displaystyle Y$ | $=$ | $\displaystyle \frac{1}{2}z$ |
$\displaystyle Z$ | $=$ | $\displaystyle w$ |
Equation of the image curve:
$0$ | $=$ | $ 2X^{8}-3X^{4}Y^{2}Z^{2}-4Y^{6}Z^{2}+Y^{4}Z^{4} $ |
Modular covers
This modular curve minimally covers the modular curves listed below.
Covered curve | Level | Index | Degree | Genus | Rank |
---|---|---|---|---|---|
40.96.1-8.k.2.4 | $40$ | $2$ | $2$ | $1$ | $0$ |
80.96.1-8.k.2.6 | $80$ | $2$ | $2$ | $1$ | $?$ |
80.96.3-16.d.1.8 | $80$ | $2$ | $2$ | $3$ | $?$ |
80.96.3-16.d.1.10 | $80$ | $2$ | $2$ | $3$ | $?$ |
80.96.3-16.f.1.1 | $80$ | $2$ | $2$ | $3$ | $?$ |
80.96.3-16.f.1.11 | $80$ | $2$ | $2$ | $3$ | $?$ |
This modular curve is minimally covered by the modular curves in the database listed below.