Invariants
| Level: | $204$ | $\SL_2$-level: | $12$ | ||||
| Index: | $96$ | $\PSL_2$-index: | $48$ | ||||
| Genus: | $0 = 1 + \frac{ 48 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 10 }{2}$ | ||||||
| Cusps: | $10$ (of which $4$ are rational) | Cusp widths | $1^{2}\cdot2\cdot3^{2}\cdot4^{2}\cdot6\cdot12^{2}$ | Cusp orbits | $1^{4}\cdot2^{3}$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| $\Q$-gonality: | $1$ | ||||||
| $\overline{\Q}$-gonality: | $1$ | ||||||
| Rational cusps: | $4$ | ||||||
| Rational CM points: | none |
Other labels
| Cummins and Pauli (CP) label: | 12J0 |
Level structure
| $\GL_2(\Z/204\Z)$-generators: | $\begin{bmatrix}100&159\\33&142\end{bmatrix}$, $\begin{bmatrix}126&175\\125&28\end{bmatrix}$, $\begin{bmatrix}186&179\\179&90\end{bmatrix}$, $\begin{bmatrix}200&121\\185&96\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 12.48.0.c.3 for the level structure with $-I$) |
| Cyclic 204-isogeny field degree: | $18$ |
| Cyclic 204-torsion field degree: | $1152$ |
| Full 204-torsion field degree: | $3760128$ |
Models
This modular curve is isomorphic to $\mathbb{P}^1$.
Rational points
This modular curve has infinitely many rational points, including 17 stored non-cuspidal points.
Maps to other modular curves
$j$-invariant map of degree 48 to the modular curve $X(1)$ :
| $\displaystyle j$ | $=$ | $\displaystyle \frac{1}{2^3}\cdot\frac{(x-2y)^{48}(x^{4}+8x^{3}y-24x^{2}y^{2}+32xy^{3}+16y^{4})^{3}(x^{12}-24x^{11}y+312x^{10}y^{2}-1504x^{9}y^{3}+1776x^{8}y^{4}+8448x^{7}y^{5}-28416x^{6}y^{6}+33792x^{5}y^{7}+28416x^{4}y^{8}-96256x^{3}y^{9}+79872x^{2}y^{10}-24576xy^{11}+4096y^{12})^{3}}{y^{3}x^{3}(x-2y)^{54}(x+2y)^{2}(x^{2}+4y^{2})^{12}(x^{2}-8xy+4y^{2})^{4}(x^{2}-2xy+4y^{2})}$ |
Modular covers
This modular curve minimally covers the modular curves listed below.
| Covered curve | Level | Index | Degree | Genus | Rank |
|---|---|---|---|---|---|
| 204.48.0-12.g.1.3 | $204$ | $2$ | $2$ | $0$ | $?$ |
| 204.48.0-12.g.1.10 | $204$ | $2$ | $2$ | $0$ | $?$ |
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus |
|---|---|---|---|---|
| 204.192.1-12.b.3.1 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-12.e.1.6 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-12.f.1.3 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-12.g.1.4 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-204.l.1.2 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-204.m.1.3 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-204.n.3.2 | $204$ | $2$ | $2$ | $1$ |
| 204.192.1-204.o.1.3 | $204$ | $2$ | $2$ | $1$ |
| 204.288.3-12.c.1.7 | $204$ | $3$ | $3$ | $3$ |