Properties

Label 280.240.7-20.o.1.3
Level $280$
Index $240$
Genus $7$
Cusps $8$
$\Q$-cusps $0$

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Invariants

Level: $280$ $\SL_2$-level: $20$ Newform level: $400$
Index: $240$ $\PSL_2$-index:$120$
Genus: $7 = 1 + \frac{ 120 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 8 }{2}$
Cusps: $8$ (none of which are rational) Cusp widths $10^{4}\cdot20^{4}$ Cusp orbits $2^{2}\cdot4$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: not computed
$\Q$-gonality: $4 \le \gamma \le 12$
$\overline{\Q}$-gonality: $4 \le \gamma \le 7$
Rational cusps: $0$
Rational CM points: none

Other labels

Cummins and Pauli (CP) label: 20C7

Level structure

$\GL_2(\Z/280\Z)$-generators: $\begin{bmatrix}43&142\\2&147\end{bmatrix}$, $\begin{bmatrix}115&81\\244&65\end{bmatrix}$, $\begin{bmatrix}149&250\\188&241\end{bmatrix}$, $\begin{bmatrix}199&91\\202&191\end{bmatrix}$, $\begin{bmatrix}229&223\\80&171\end{bmatrix}$, $\begin{bmatrix}235&217\\272&269\end{bmatrix}$
Contains $-I$: no $\quad$ (see 20.120.7.o.1 for the level structure with $-I$)
Cyclic 280-isogeny field degree: $96$
Cyclic 280-torsion field degree: $9216$
Full 280-torsion field degree: $6193152$

Models

Canonical model in $\mathbb{P}^{ 6 }$ defined by 10 equations

$ 0 $ $=$ $ 2 x z - x w + y u - y v + t u + t v $
$=$ $x^{2} - 2 y^{2} + 2 y t + z^{2} + z w + u^{2} - v^{2}$
$=$ $x z + 2 x w + y v + 2 t u + t v$
$=$ $x y - 3 x t - z v + w u$
$=$$\cdots$
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Singular plane model Singular plane model

$ 0 $ $=$ $ x^{12} + 8 x^{10} y^{2} - 4 x^{10} z^{2} + 24 x^{8} y^{4} - 18 x^{8} y^{2} z^{2} + 6 x^{8} z^{4} + \cdots + y^{4} z^{8} $
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Rational points

This modular curve has no $\Q_p$ points for $p=7$, and therefore no rational points.

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 20.60.3.a.1 :

$\displaystyle X$ $=$ $\displaystyle -5x$
$\displaystyle Y$ $=$ $\displaystyle -3y-t$
$\displaystyle Z$ $=$ $\displaystyle y-3t$

Equation of the image curve:

$0$ $=$ $ X^{4}+9X^{2}Y^{2}+14Y^{4}-X^{2}YZ+8Y^{3}Z-14X^{2}Z^{2}-19Y^{2}Z^{2}+7YZ^{3}-Z^{4} $

Map of degree 1 from the canonical model of this modular curve to the plane model of the modular curve 20.120.7.o.1 :

$\displaystyle X$ $=$ $\displaystyle x$
$\displaystyle Y$ $=$ $\displaystyle y$
$\displaystyle Z$ $=$ $\displaystyle z$

Equation of the image curve:

$0$ $=$ $ X^{12}+8X^{10}Y^{2}-4X^{10}Z^{2}+24X^{8}Y^{4}-18X^{8}Y^{2}Z^{2}+6X^{8}Z^{4}+32X^{6}Y^{6}-32X^{6}Y^{4}Z^{2}+15X^{6}Y^{2}Z^{4}-4X^{6}Z^{6}+16X^{4}Y^{8}-40X^{4}Y^{6}Z^{2}-23X^{4}Y^{4}Z^{4}-8X^{4}Y^{2}Z^{6}+X^{4}Z^{8}-32X^{2}Y^{8}Z^{2}+14X^{2}Y^{4}Z^{6}+3X^{2}Y^{2}Z^{8}+16Y^{8}Z^{4}+8Y^{6}Z^{6}+Y^{4}Z^{8} $

Modular covers

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank
280.24.0-20.d.1.2 $280$ $10$ $10$ $0$ $?$
280.120.3-20.a.1.2 $280$ $2$ $2$ $3$ $?$
280.120.3-20.a.1.7 $280$ $2$ $2$ $3$ $?$

This modular curve is minimally covered by the modular curves in the database listed below.

Covering curve Level Index Degree Genus
280.480.13-20.y.1.1 $280$ $2$ $2$ $13$
280.480.13-20.z.1.1 $280$ $2$ $2$ $13$
280.480.13-20.bc.1.1 $280$ $2$ $2$ $13$
280.480.13-20.bd.1.1 $280$ $2$ $2$ $13$
280.480.13-140.dc.1.1 $280$ $2$ $2$ $13$
280.480.13-140.dd.1.2 $280$ $2$ $2$ $13$
280.480.13-140.do.1.1 $280$ $2$ $2$ $13$
280.480.13-140.dp.1.3 $280$ $2$ $2$ $13$
280.480.13-40.go.1.3 $280$ $2$ $2$ $13$
280.480.13-40.gv.1.4 $280$ $2$ $2$ $13$
280.480.13-40.hq.1.4 $280$ $2$ $2$ $13$
280.480.13-40.hx.1.3 $280$ $2$ $2$ $13$
280.480.13-280.vq.1.6 $280$ $2$ $2$ $13$
280.480.13-280.vx.1.1 $280$ $2$ $2$ $13$
280.480.13-280.yw.1.2 $280$ $2$ $2$ $13$
280.480.13-280.zd.1.5 $280$ $2$ $2$ $13$
280.480.15-40.dk.1.5 $280$ $2$ $2$ $15$
280.480.15-40.dk.1.14 $280$ $2$ $2$ $15$
280.480.15-40.dl.1.7 $280$ $2$ $2$ $15$
280.480.15-40.dl.1.13 $280$ $2$ $2$ $15$
280.480.15-40.dq.1.5 $280$ $2$ $2$ $15$
280.480.15-40.dq.1.15 $280$ $2$ $2$ $15$
280.480.15-40.dr.1.7 $280$ $2$ $2$ $15$
280.480.15-40.dr.1.13 $280$ $2$ $2$ $15$
280.480.15-40.em.1.7 $280$ $2$ $2$ $15$
280.480.15-40.em.1.13 $280$ $2$ $2$ $15$
280.480.15-40.en.1.5 $280$ $2$ $2$ $15$
280.480.15-40.en.1.14 $280$ $2$ $2$ $15$
280.480.15-40.ew.1.7 $280$ $2$ $2$ $15$
280.480.15-40.ew.1.13 $280$ $2$ $2$ $15$
280.480.15-40.ex.1.5 $280$ $2$ $2$ $15$
280.480.15-40.ex.1.15 $280$ $2$ $2$ $15$
280.480.15-280.fs.1.10 $280$ $2$ $2$ $15$
280.480.15-280.fs.1.20 $280$ $2$ $2$ $15$
280.480.15-280.ft.1.2 $280$ $2$ $2$ $15$
280.480.15-280.ft.1.24 $280$ $2$ $2$ $15$
280.480.15-280.gc.1.10 $280$ $2$ $2$ $15$
280.480.15-280.gc.1.20 $280$ $2$ $2$ $15$
280.480.15-280.gd.1.2 $280$ $2$ $2$ $15$
280.480.15-280.gd.1.24 $280$ $2$ $2$ $15$
280.480.15-280.gy.1.2 $280$ $2$ $2$ $15$
280.480.15-280.gy.1.28 $280$ $2$ $2$ $15$
280.480.15-280.gz.1.10 $280$ $2$ $2$ $15$
280.480.15-280.gz.1.22 $280$ $2$ $2$ $15$
280.480.15-280.hi.1.2 $280$ $2$ $2$ $15$
280.480.15-280.hi.1.28 $280$ $2$ $2$ $15$
280.480.15-280.hj.1.10 $280$ $2$ $2$ $15$
280.480.15-280.hj.1.22 $280$ $2$ $2$ $15$