Properties

Label 120.72.2-12.i.1.11
Level $120$
Index $72$
Genus $2$
Cusps $4$
$\Q$-cusps $0$

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Invariants

Level: $120$ $\SL_2$-level: $24$ Newform level: $144$
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: $\begin{bmatrix}7&93\\114&79\end{bmatrix}$, $\begin{bmatrix}23&61\\66&19\end{bmatrix}$, $\begin{bmatrix}25&62\\72&65\end{bmatrix}$, $\begin{bmatrix}33&32\\16&81\end{bmatrix}$, $\begin{bmatrix}53&44\\68&73\end{bmatrix}$, $\begin{bmatrix}53&62\\32&81\end{bmatrix}$
Contains $-I$: no $\quad$ (see 12.36.2.i.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 $ $=$ $ - x w + y^{2} $
$=$ $4 z^{2} + w^{2} + t^{2}$
$=$ $4 x y + z w$
$=$ $4 x^{2} + y z$
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Singular plane model Singular plane model

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

$ y^{2} $ $=$ $ -x^{6} - 1 $
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Rational points

This modular curve has no real points and no $\Q_p$ points for $p=7$, and therefore no 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 $X(1)$ :

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

Map of degree 1 from the embedded model of this modular curve to the plane model of the modular curve 12.36.2.i.1 :

$\displaystyle X$ $=$ $\displaystyle y$
$\displaystyle Y$ $=$ $\displaystyle \frac{1}{2}t$
$\displaystyle Z$ $=$ $\displaystyle \frac{1}{2}w$

Equation of the image curve:

$0$ $=$ $ X^{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 12.36.2.i.1 :

$\displaystyle X$ $=$ $\displaystyle -\frac{1}{2}w$
$\displaystyle Y$ $=$ $\displaystyle -\frac{1}{8}w^{2}t$
$\displaystyle Z$ $=$ $\displaystyle -y$

Modular covers

The following modular covers realize this modular curve as a fiber product over $X(1)$.

Factor curve Level Index Degree Genus Rank
$X_{\mathrm{ns}}^+(3)$ $3$ $24$ $12$ $0$ $0$
40.24.0-4.c.1.2 $40$ $3$ $3$ $0$ $0$

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank
40.24.0-4.c.1.2 $40$ $3$ $3$ $0$ $0$
120.36.1-12.b.1.1 $120$ $2$ $2$ $1$ $?$
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
120.144.3-12.s.1.5 $120$ $2$ $2$ $3$
120.144.3-12.t.1.5 $120$ $2$ $2$ $3$
120.144.3-12.u.1.3 $120$ $2$ $2$ $3$
120.144.3-12.v.1.5 $120$ $2$ $2$ $3$
120.144.3-60.ce.1.12 $120$ $2$ $2$ $3$
120.144.3-60.cf.1.5 $120$ $2$ $2$ $3$
120.144.3-60.cg.1.11 $120$ $2$ $2$ $3$
120.144.3-60.ch.1.12 $120$ $2$ $2$ $3$
120.144.3-24.eo.1.7 $120$ $2$ $2$ $3$
120.144.3-24.ev.1.8 $120$ $2$ $2$ $3$
120.144.3-24.fc.1.8 $120$ $2$ $2$ $3$
120.144.3-24.fj.1.6 $120$ $2$ $2$ $3$
120.144.3-120.nw.1.9 $120$ $2$ $2$ $3$
120.144.3-120.od.1.10 $120$ $2$ $2$ $3$
120.144.3-120.ok.1.9 $120$ $2$ $2$ $3$
120.144.3-120.or.1.16 $120$ $2$ $2$ $3$
120.144.5-24.bg.1.1 $120$ $2$ $2$ $5$
120.144.5-120.bg.1.5 $120$ $2$ $2$ $5$
120.144.5-24.bh.1.2 $120$ $2$ $2$ $5$
120.144.5-120.bh.1.7 $120$ $2$ $2$ $5$
120.144.5-24.bi.1.2 $120$ $2$ $2$ $5$
120.144.5-120.bi.1.13 $120$ $2$ $2$ $5$
120.144.5-24.bj.1.4 $120$ $2$ $2$ $5$
120.144.5-120.bj.1.15 $120$ $2$ $2$ $5$
120.144.5-24.bk.1.4 $120$ $2$ $2$ $5$
120.144.5-120.bk.1.10 $120$ $2$ $2$ $5$
120.144.5-24.bl.1.2 $120$ $2$ $2$ $5$
120.144.5-120.bl.1.7 $120$ $2$ $2$ $5$
120.144.5-24.bm.1.2 $120$ $2$ $2$ $5$
120.144.5-120.bm.1.5 $120$ $2$ $2$ $5$
120.144.5-24.bn.1.3 $120$ $2$ $2$ $5$
120.144.5-120.bn.1.9 $120$ $2$ $2$ $5$
120.360.14-60.q.1.16 $120$ $5$ $5$ $14$
120.432.15-60.y.1.21 $120$ $6$ $6$ $15$