| Curve name |
$X_{168}$ |
| Index |
$24$ |
| Level |
$16$ |
| Genus |
$1$ |
| Does the subgroup contain $-I$? |
Yes |
| Generating matrices |
$
\left[ \begin{matrix} 7 & 7 \\ 8 & 7 \end{matrix}\right],
\left[ \begin{matrix} 7 & 0 \\ 0 & 7 \end{matrix}\right],
\left[ \begin{matrix} 1 & 0 \\ 8 & 7 \end{matrix}\right],
\left[ \begin{matrix} 5 & 0 \\ 0 & 1 \end{matrix}\right],
\left[ \begin{matrix} 3 & 0 \\ 0 & 3 \end{matrix}\right]$ |
| Images in lower levels |
|
| Meaning/Special name |
|
| Chosen covering |
$X_{36}$ |
| Curves that $X_{168}$ minimally covers |
$X_{36}$ |
| Curves that minimally cover $X_{168}$ |
$X_{305}$, $X_{313}$, $X_{330}$, $X_{332}$, $X_{335}$, $X_{336}$, $X_{337}$, $X_{338}$, $X_{339}$, $X_{340}$, $X_{427}$, $X_{428}$, $X_{429}$, $X_{430}$, $X_{431}$, $X_{432}$, $X_{433}$, $X_{438}$ |
| Curves that minimally cover $X_{168}$ and have infinitely many rational
points. |
|
| Model |
\[y^2 = x^3 - x\] |
| Info about rational points |
| Rational point | Image on the $j$-line |
| $(0 : 1 : 0)$ |
\[ \infty \]
|
| $(-1 : 0 : 1)$ |
\[ \infty \]
|
| $(0 : 0 : 1)$ |
\[ \infty \]
|
| $(1 : 0 : 1)$ |
\[ \infty \]
|
|
| Comments on finding rational points |
None |
| Elliptic curve whose $2$-adic image is the subgroup |
None |
| Generic density of odd order reductions |
N/A |