Properties

Label 75.240.9.a.2
Level $75$
Index $240$
Genus $9$
Cusps $24$
$\Q$-cusps $4$

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Invariants

Level: $75$ $\SL_2$-level: $75$ Newform level: $1$
Index: $240$ $\PSL_2$-index:$240$
Genus: $9 = 1 + \frac{ 240 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 24 }{2}$
Cusps: $24$ (of which $4$ are rational) Cusp widths $1^{10}\cdot3^{10}\cdot25^{2}\cdot75^{2}$ Cusp orbits $1^{4}\cdot2^{2}\cdot4^{4}$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: not computed
$\Q$-gonality: $3 \le \gamma \le 9$
$\overline{\Q}$-gonality: $3 \le \gamma \le 9$
Rational cusps: $4$
Rational CM points: none

Other labels

Cummins and Pauli (CP) label: 75F9

Level structure

$\GL_2(\Z/75\Z)$-generators: $\begin{bmatrix}13&47\\0&11\end{bmatrix}$, $\begin{bmatrix}13&62\\0&14\end{bmatrix}$, $\begin{bmatrix}67&10\\0&16\end{bmatrix}$, $\begin{bmatrix}71&28\\0&4\end{bmatrix}$
Contains $-I$: yes
Quadratic refinements: 75.480.9-75.a.2.1, 75.480.9-75.a.2.2, 75.480.9-75.a.2.3, 75.480.9-75.a.2.4, 75.480.9-75.a.2.5, 75.480.9-75.a.2.6, 75.480.9-75.a.2.7, 75.480.9-75.a.2.8, 150.480.9-75.a.2.1, 150.480.9-75.a.2.2, 150.480.9-75.a.2.3, 150.480.9-75.a.2.4, 150.480.9-75.a.2.5, 150.480.9-75.a.2.6, 150.480.9-75.a.2.7, 150.480.9-75.a.2.8, 300.480.9-75.a.2.1, 300.480.9-75.a.2.2, 300.480.9-75.a.2.3, 300.480.9-75.a.2.4, 300.480.9-75.a.2.5, 300.480.9-75.a.2.6, 300.480.9-75.a.2.7, 300.480.9-75.a.2.8, 300.480.9-75.a.2.9, 300.480.9-75.a.2.10, 300.480.9-75.a.2.11, 300.480.9-75.a.2.12, 300.480.9-75.a.2.13, 300.480.9-75.a.2.14, 300.480.9-75.a.2.15, 300.480.9-75.a.2.16
Cyclic 75-isogeny field degree: $1$
Cyclic 75-torsion field degree: $40$
Full 75-torsion field degree: $60000$

Rational points

This modular curve has 4 rational cusps but no known non-cuspidal rational points.

Modular covers

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

Factor curve Level Index Degree Genus Rank
$X_0(3)$ $3$ $60$ $60$ $0$ $0$
25.60.0.a.2 $25$ $4$ $4$ $0$ $0$

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank
15.48.1.a.2 $15$ $5$ $5$ $1$ $0$
25.60.0.a.2 $25$ $4$ $4$ $0$ $0$
$X_0(75)$ $75$ $2$ $2$ $5$ $?$

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

Covering curve Level Index Degree Genus
75.480.17.a.2 $75$ $2$ $2$ $17$
75.480.17.a.4 $75$ $2$ $2$ $17$
75.480.17.b.3 $75$ $2$ $2$ $17$
75.480.17.b.4 $75$ $2$ $2$ $17$
300.480.17.a.1 $300$ $2$ $2$ $17$
300.480.17.a.2 $300$ $2$ $2$ $17$
300.480.17.b.3 $300$ $2$ $2$ $17$
300.480.17.b.4 $300$ $2$ $2$ $17$