Properties

Label 120.72.2-60.v.1.3
Level $120$
Index $72$
Genus $2$
Cusps $4$
$\Q$-cusps $0$

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Invariants

Level: $120$ $\SL_2$-level: $24$ Newform level: $3600$
Index: $72$ $\PSL_2$-index:$36$
Genus: $2 = 1 + \frac{ 36 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 4 }{2}$
Cusps: $4$ (none of which are rational) Cusp widths $6^{2}\cdot12^{2}$ Cusp orbits $2^{2}$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: not computed
$\Q$-gonality: $2$
$\overline{\Q}$-gonality: $2$
Rational cusps: $0$
Rational CM points: none

Other labels

Cummins and Pauli (CP) label: 12B2

Level structure

$\GL_2(\Z/120\Z)$-generators: $\begin{bmatrix}43&31\\22&47\end{bmatrix}$, $\begin{bmatrix}57&59\\80&37\end{bmatrix}$, $\begin{bmatrix}63&19\\28&107\end{bmatrix}$, $\begin{bmatrix}71&119\\8&79\end{bmatrix}$, $\begin{bmatrix}75&58\\26&57\end{bmatrix}$
Contains $-I$: no $\quad$ (see 60.36.2.v.1 for the level structure with $-I$)
Cyclic 120-isogeny field degree: $96$
Cyclic 120-torsion field degree: $3072$
Full 120-torsion field degree: $491520$

Models

Embedded model Embedded model in $\mathbb{P}^{4}$

$ 0 $ $=$ $ 4 x y - z t $
$=$ $15 x^{2} - y t$
$=$ $ - 15 x z + 4 y^{2}$
$=$ $60 z^{2} + 15 w^{2} - t^{2}$
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Singular plane model Singular plane model

$ 0 $ $=$ $ 3375 x^{6} - y^{2} z^{4} - z^{6} $
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Weierstrass model Weierstrass model

$ y^{2} $ $=$ $ -x^{6} + 3375 $
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Rational points

This modular curve has real points and $\Q_p$ points for $p$ not dividing the level, but no known rational points.

Maps to other modular curves

$j$-invariant map of degree 36 from the embedded model of this modular curve to the modular curve $X(1)$ :

$\displaystyle j$ $=$ $\displaystyle 2^6\cdot3^3\,\frac{(5w^{2}+t^{2})^{3}}{t^{2}(15w^{2}-t^{2})^{2}}$

Map of degree 1 from the embedded model of this modular curve to the plane model of the modular curve 60.36.2.v.1 :

$\displaystyle X$ $=$ $\displaystyle y$
$\displaystyle Y$ $=$ $\displaystyle \frac{15}{4}w$
$\displaystyle Z$ $=$ $\displaystyle \frac{15}{2}z$

Equation of the image curve:

$0$ $=$ $ 3375X^{6}-Y^{2}Z^{4}-Z^{6} $

Map of degree 1 from the embedded model of this modular curve to the Weierstrass model of the modular curve 60.36.2.v.1 :

$\displaystyle X$ $=$ $\displaystyle -\frac{1}{2}z$
$\displaystyle Y$ $=$ $\displaystyle \frac{1}{16}z^{2}w$
$\displaystyle Z$ $=$ $\displaystyle -\frac{1}{15}y$

Modular covers

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank
24.36.1-12.b.1.5 $24$ $2$ $2$ $1$ $0$
120.24.0-60.f.1.8 $120$ $3$ $3$ $0$ $?$
120.36.1-12.b.1.16 $120$ $2$ $2$ $1$ $?$

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

Covering curve Level Index Degree Genus
120.144.3-60.fq.1.2 $120$ $2$ $2$ $3$
120.144.3-60.fr.1.2 $120$ $2$ $2$ $3$
120.144.3-60.gg.1.10 $120$ $2$ $2$ $3$
120.144.3-60.gh.1.6 $120$ $2$ $2$ $3$
120.144.3-60.gw.1.2 $120$ $2$ $2$ $3$
120.144.3-60.gx.1.1 $120$ $2$ $2$ $3$
120.144.3-60.hm.1.3 $120$ $2$ $2$ $3$
120.144.3-60.hn.1.7 $120$ $2$ $2$ $3$
120.144.3-120.bjq.1.4 $120$ $2$ $2$ $3$
120.144.3-120.bjx.1.3 $120$ $2$ $2$ $3$
120.144.3-120.bny.1.5 $120$ $2$ $2$ $3$
120.144.3-120.bof.1.6 $120$ $2$ $2$ $3$
120.144.3-120.bsg.1.3 $120$ $2$ $2$ $3$
120.144.3-120.bsn.1.4 $120$ $2$ $2$ $3$
120.144.3-120.bwo.1.6 $120$ $2$ $2$ $3$
120.144.3-120.bwv.1.5 $120$ $2$ $2$ $3$
120.360.14-60.bp.1.6 $120$ $5$ $5$ $14$
120.432.15-60.cf.1.5 $120$ $6$ $6$ $15$