Properties

Label 120.72.2-24.dk.1.2
Level $120$
Index $72$
Genus $2$
Cusps $4$
$\Q$-cusps $0$

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Invariants

Level: $120$ $\SL_2$-level: $24$ Newform level: $576$
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: 12D2

Level structure

$\GL_2(\Z/120\Z)$-generators: $\begin{bmatrix}28&79\\111&110\end{bmatrix}$, $\begin{bmatrix}58&17\\59&0\end{bmatrix}$, $\begin{bmatrix}68&75\\101&22\end{bmatrix}$, $\begin{bmatrix}86&23\\35&112\end{bmatrix}$, $\begin{bmatrix}118&117\\37&44\end{bmatrix}$
Contains $-I$: no $\quad$ (see 24.36.2.dk.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 t + y t + z w $
$=$ $6 x w + z t$
$=$ $6 x^{2} - 6 x y + z^{2}$
$=$ $24 x^{2} + 24 x y + 24 y^{2} + 6 w^{2} + t^{2}$
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Singular plane model Singular plane model

$ 0 $ $=$ $ 3 x^{4} y^{2} + 3 x^{4} z^{2} + 6 x^{2} y^{2} z^{2} + 2 x^{2} z^{4} + 4 y^{2} z^{4} $
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Weierstrass model Weierstrass model

$ y^{2} $ $=$ $ -8x^{6} - 24x^{4} - 24x^{2} - 9 $
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Rational points

This modular curve has no real points, 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 $X(1)$ :

$\displaystyle j$ $=$ $\displaystyle 2^9\cdot3^3\,\frac{576y^{2}z^{4}+720y^{2}z^{2}t^{2}-156y^{2}t^{4}-104z^{4}t^{2}-76z^{2}t^{4}-36w^{6}-75w^{2}t^{4}-2t^{6}}{4608y^{2}z^{4}+576y^{2}z^{2}t^{2}-168y^{2}t^{4}+32z^{4}t^{2}+4z^{2}t^{4}-6w^{2}t^{4}-t^{6}}$

Map of degree 1 from the embedded model of this modular curve to the plane model of the modular curve 24.36.2.dk.1 :

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

Equation of the image curve:

$0$ $=$ $ 3X^{4}Y^{2}+3X^{4}Z^{2}+6X^{2}Y^{2}Z^{2}+2X^{2}Z^{4}+4Y^{2}Z^{4} $

Map of degree 1 from the embedded model of this modular curve to the Weierstrass model of the modular curve 24.36.2.dk.1 :

$\displaystyle X$ $=$ $\displaystyle -\frac{1}{2}wt^{2}$
$\displaystyle Y$ $=$ $\displaystyle -6zw^{6}t^{2}-3zw^{4}t^{4}-\frac{1}{2}zw^{2}t^{6}$
$\displaystyle Z$ $=$ $\displaystyle -w^{2}t$

Modular covers

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank
120.36.1-12.b.1.2 $120$ $2$ $2$ $1$ $?$
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
120.144.3-24.h.1.9 $120$ $2$ $2$ $3$
120.144.3-24.bz.1.4 $120$ $2$ $2$ $3$
120.144.3-24.eo.1.7 $120$ $2$ $2$ $3$
120.144.3-24.er.1.3 $120$ $2$ $2$ $3$
120.144.3-24.lg.1.3 $120$ $2$ $2$ $3$
120.144.3-24.lh.1.4 $120$ $2$ $2$ $3$
120.144.3-24.lu.1.4 $120$ $2$ $2$ $3$
120.144.3-24.lv.1.5 $120$ $2$ $2$ $3$
120.144.3-120.btw.1.14 $120$ $2$ $2$ $3$
120.144.3-120.btx.1.8 $120$ $2$ $2$ $3$
120.144.3-120.buk.1.5 $120$ $2$ $2$ $3$
120.144.3-120.bul.1.6 $120$ $2$ $2$ $3$
120.144.3-120.bwa.1.5 $120$ $2$ $2$ $3$
120.144.3-120.bwb.1.4 $120$ $2$ $2$ $3$
120.144.3-120.bwo.1.6 $120$ $2$ $2$ $3$
120.144.3-120.bwp.1.5 $120$ $2$ $2$ $3$
120.360.14-120.hs.1.12 $120$ $5$ $5$ $14$
120.432.15-120.lc.1.28 $120$ $6$ $6$ $15$