Invariants
Level: | $220$ | $\SL_2$-level: | $4$ | ||||
Index: | $12$ | $\PSL_2$-index: | $12$ | ||||
Genus: | $0 = 1 + \frac{ 12 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 4 }{2}$ | ||||||
Cusps: | $4$ (none of which are rational) | Cusp widths | $2^{2}\cdot4^{2}$ | Cusp orbits | $2^{2}$ | ||
Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
$\Q$-gonality: | $2$ | ||||||
$\overline{\Q}$-gonality: | $1$ | ||||||
Rational cusps: | $0$ | ||||||
Rational CM points: | none |
Other labels
Cummins and Pauli (CP) label: | 4E0 |
Level structure
$\GL_2(\Z/220\Z)$-generators: | $\begin{bmatrix}65&42\\32&115\end{bmatrix}$, $\begin{bmatrix}139&140\\159&171\end{bmatrix}$, $\begin{bmatrix}143&190\\149&21\end{bmatrix}$ |
Contains $-I$: | yes |
Quadratic refinements: | none in database |
Cyclic 220-isogeny field degree: | $144$ |
Cyclic 220-torsion field degree: | $11520$ |
Full 220-torsion field degree: | $50688000$ |
Rational points
This modular curve has no real points, and therefore no rational points.
Modular covers
This modular curve minimally covers the modular curves listed below.
Covered curve | Level | Index | Degree | Genus | Rank |
---|---|---|---|---|---|
20.6.0.b.1 | $20$ | $2$ | $2$ | $0$ | $0$ |
44.6.0.e.1 | $44$ | $2$ | $2$ | $0$ | $0$ |
110.6.0.a.1 | $110$ | $2$ | $2$ | $0$ | $?$ |
This modular curve is minimally covered by the modular curves in the database listed below.
Covering curve | Level | Index | Degree | Genus |
---|---|---|---|---|
220.60.4.bd.1 | $220$ | $5$ | $5$ | $4$ |
220.72.3.bt.1 | $220$ | $6$ | $6$ | $3$ |
220.120.7.cj.1 | $220$ | $10$ | $10$ | $7$ |
220.144.9.bd.1 | $220$ | $12$ | $12$ | $9$ |