Invariants
Level: | $72$ | $\SL_2$-level: | $18$ | Newform level: | $1$ | ||
Index: | $48$ | $\PSL_2$-index: | $24$ | ||||
Genus: | $2 = 1 + \frac{ 24 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 2 }{2}$ | ||||||
Cusps: | $2$ (all of which are rational) | Cusp widths | $6\cdot18$ | Cusp orbits | $1^{2}$ | ||
Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
Analytic rank: | not computed | ||||||
$\Q$-gonality: | $2$ | ||||||
$\overline{\Q}$-gonality: | $2$ | ||||||
Rational cusps: | $2$ | ||||||
Rational CM points: | none |
Other labels
Cummins and Pauli (CP) label: | 18B2 |
Level structure
$\GL_2(\Z/72\Z)$-generators: | $\begin{bmatrix}0&53\\5&21\end{bmatrix}$, $\begin{bmatrix}61&11\\10&63\end{bmatrix}$, $\begin{bmatrix}69&32\\10&59\end{bmatrix}$ |
Contains $-I$: | no $\quad$ (see 72.24.2.b.1 for the level structure with $-I$) |
Cyclic 72-isogeny field degree: | $36$ |
Cyclic 72-torsion field degree: | $864$ |
Full 72-torsion field degree: | $124416$ |
Rational points
This modular curve has 2 rational cusps but no known non-cuspidal rational points.
Modular covers
This modular curve minimally covers the modular curves listed below.
Covered curve | Level | Index | Degree | Genus | Rank |
---|---|---|---|---|---|
18.24.1-9.a.1.1 | $18$ | $2$ | $2$ | $1$ | $0$ |
72.24.1-9.a.1.4 | $72$ | $2$ | $2$ | $1$ | $?$ |
24.16.0-24.b.1.5 | $24$ | $3$ | $3$ | $0$ | $0$ |
This modular curve is minimally covered by the modular curves in the database listed below.
Covering curve | Level | Index | Degree | Genus |
---|---|---|---|---|
72.144.4-72.c.1.1 | $72$ | $3$ | $3$ | $4$ |
72.144.4-72.j.1.8 | $72$ | $3$ | $3$ | $4$ |
72.144.4-72.l.1.2 | $72$ | $3$ | $3$ | $4$ |
72.144.4-72.l.2.1 | $72$ | $3$ | $3$ | $4$ |
72.144.4-72.n.1.2 | $72$ | $3$ | $3$ | $4$ |
72.192.7-72.b.1.1 | $72$ | $4$ | $4$ | $7$ |