Properties

Label 80.192.5-16.v.2.10
Level $80$
Index $192$
Genus $5$
Cusps $8$
$\Q$-cusps $4$

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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 $
$=$ $2 z^{2} - w t - t^{2}$
$=$ $2 x^{2} + y z$
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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} $
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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.

Covering curve Level Index Degree Genus
80.384.9-16.r.2.6 $80$ $2$ $2$ $9$
80.384.9-16.bn.2.7 $80$ $2$ $2$ $9$
80.384.9-16.bq.3.3 $80$ $2$ $2$ $9$
80.384.9-16.bw.2.1 $80$ $2$ $2$ $9$
80.384.9-16.by.2.8 $80$ $2$ $2$ $9$
80.384.9-16.cc.2.8 $80$ $2$ $2$ $9$
80.384.9-80.ef.2.10 $80$ $2$ $2$ $9$
80.384.9-80.jl.2.10 $80$ $2$ $2$ $9$
80.384.9-80.jv.2.9 $80$ $2$ $2$ $9$
80.384.9-80.ka.2.5 $80$ $2$ $2$ $9$
80.384.9-80.ke.2.11 $80$ $2$ $2$ $9$
80.384.9-80.ky.2.12 $80$ $2$ $2$ $9$
160.384.13-32.z.3.10 $160$ $2$ $2$ $13$
160.384.13-32.z.4.10 $160$ $2$ $2$ $13$
160.384.13-32.bd.2.16 $160$ $2$ $2$ $13$
160.384.13-32.be.2.1 $160$ $2$ $2$ $13$
160.384.13-32.bf.3.10 $160$ $2$ $2$ $13$
160.384.13-32.bf.4.10 $160$ $2$ $2$ $13$
160.384.13-160.cy.3.19 $160$ $2$ $2$ $13$
160.384.13-160.cy.4.17 $160$ $2$ $2$ $13$
160.384.13-160.cz.2.30 $160$ $2$ $2$ $13$
160.384.13-160.da.2.7 $160$ $2$ $2$ $13$
160.384.13-160.db.3.19 $160$ $2$ $2$ $13$
160.384.13-160.db.4.17 $160$ $2$ $2$ $13$
240.384.9-48.cn.2.15 $240$ $2$ $2$ $9$
240.384.9-48.fx.2.16 $240$ $2$ $2$ $9$
240.384.9-48.gh.2.7 $240$ $2$ $2$ $9$
240.384.9-48.gm.2.8 $240$ $2$ $2$ $9$
240.384.9-48.gq.2.16 $240$ $2$ $2$ $9$
240.384.9-48.hc.2.16 $240$ $2$ $2$ $9$
240.384.9-240.lt.1.16 $240$ $2$ $2$ $9$
240.384.9-240.bix.2.28 $240$ $2$ $2$ $9$
240.384.9-240.bjz.2.6 $240$ $2$ $2$ $9$
240.384.9-240.bkk.2.12 $240$ $2$ $2$ $9$
240.384.9-240.bko.2.31 $240$ $2$ $2$ $9$
240.384.9-240.bnm.1.24 $240$ $2$ $2$ $9$