| Curve name |
$X_{240a}$ |
| Index |
$96$ |
| Level |
$32$ |
| Genus |
$0$ |
| Does the subgroup contain $-I$? |
No |
| Generating matrices |
$
\left[ \begin{matrix} 1 & 0 \\ 16 & 7 \end{matrix}\right],
\left[ \begin{matrix} 3 & 0 \\ 16 & 1 \end{matrix}\right],
\left[ \begin{matrix} 3 & 0 \\ 16 & 3 \end{matrix}\right],
\left[ \begin{matrix} 7 & 7 \\ 16 & 1 \end{matrix}\right]$ |
| Images in lower levels |
|
| Meaning/Special name |
|
| Chosen covering |
$X_{240}$ |
| Curves that $X_{240a}$ minimally covers |
|
| Curves that minimally cover $X_{240a}$ |
|
| Curves that minimally cover $X_{240a}$ and have infinitely many rational
points. |
|
| Model |
$\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is
given by
\[y^2 = x^3 + A(t)x + B(t), \text{ where}\]
\[A(t) = -108t^{24} + 864t^{20} - 13824t^{12} + 25920t^{8} + 13824t^{4} -
27648\]
\[B(t) = -432t^{36} + 5184t^{32} - 10368t^{28} - 96768t^{24} + 445824t^{20} -
41472t^{16} - 2515968t^{12} + 3649536t^{8} - 1327104t^{4} + 1769472\]
|
| Info about rational points |
| Comments on finding rational points |
None |
| Elliptic curve whose $2$-adic image is the subgroup |
$y^2 = x^3 - 46092x - 3808784$, with conductor $2880$ |
| Generic density of odd order reductions |
$73/672$ |